Motherboard P5P41T/USB3
E5470 First Edition V1 April 2010 Copyright © 2010 ASUSTeK Computer Inc. All Rights Reserved. No part of this manual, including the products and software described in it, may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language in any form or by any means, except documentation kept by the purchaser for backup purposes, without the express written permission of ASUSTeK Computer Inc. (“ASUS”).
Contents Notices.......................................................................................................... vi Safety information...................................................................................... vii About this guide......................................................................................... vii P5P41T/USB3 specifications summary..................................................... ix Chapter 1: Product introduction 1.1 Welcome!............................
Contents 1.9 Jumpers....................................................................................... 1-20 1.10 Connectors.................................................................................. 1-21 1.11 1.10.1 Rear panel connectors................................................... 1-21 1.10.2 Internal connectors........................................................ 1-22 Software support......................................................................... 1-28 1.11.
Contents 2.5 2.6 2.7 2.8 2.4.4 Onboard Devices Configuration..................................... 2-13 2.4.5 USB Configuration......................................................... 2-14 2.4.6 PCI PnP......................................................................... 2-15 Power menu................................................................................. 2-15 2.5.1 Suspend Mode [Auto].................................................... 2-15 2.5.2 ACPI 2.0 Support [Enabled].....
Notices Federal Communications Commission Statement This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: • This device may not cause harmful interference, and • This device must accept any interference received including interference that may cause undesired operation. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules.
Safety information Electrical safety • To prevent electric shock hazard, disconnect the power cable from the electric outlet before relocating the system. • When adding or removing devices to or from the system, ensure that the power cables for the devices are unplugged before the signal cables are connected. If possible, disconnect all power cables from the existing system before you add a device.
Conventions used in this guide To ensure that you perform certain tasks properly, take note of the following symbols used throughout this manual. DANGER/WARNING: Information to prevent injury to yourself when trying to complete a task. CAUTION: Information to prevent damage to the components when trying to complete a task. IMPORTANT: Instructions that you MUST follow to complete a task. NOTE: Tips and additional information to help you complete a task.
P5P41T/USB3 specifications summary CPU LGA775 socket for Intel® Core™2 Quad / Core™2 Extreme / Core™2 Duo / Pentium® dual-core / Celeron® dual-core / Celeron® processors Supports Intel® 45nm multi-core CPU Supports Enhanced Intel® SpeedStep® Technology (EIST) * Refer to www.asus.com for Intel® CPU support list.
P5P41T/USB3 specifications summary Back panel I/O ports 1 x PS/2 keyboard port 1 x PS/2 mouse port 1 x Optical S/PDIF out port 1 x COM port 1 x LPT port 1 x LAN (RJ-45) port 4 x USB 2.0/1.1 ports 2 x USB3.0/USB 2.0/1.1 Combo ports 3 x audio jacks Internal connectors 2 x USB 2.0/1.1 connectors support additional 4 USB 2.0/1.
Chapter 1 Product introduction 1.1 Welcome! Thank you for buying an ASUS® P5P41T/USB3 motherboard! The motherboard delivers a host of new features and latest technologies, making it another standout in the long line of ASUS quality motherboards! Before you start installing the motherboard, and hardware devices on it, check the items in your package with the list below. 1.2 Package contents Check your motherboard package for the following items.
Dual channel DDR3 1333(O.C.)/1066/800 MHz support This motherboard supports DDR3 memory that features data transfer rates of 1333(O.C.)/1066/800 MHz providing great performance for 3D graphics and other memory-demanding applications. USB 3.0 support Experience ultra-fast data transfer at 4.8Gbps with USB 3.0 – the latest connectivity standard. Built to connect easily with next-generation components and peripherals, USB 3.0 transfers data 10x faster and is also backward compatible with USB 2.0 components.
ASUS Express Gate Express Gate is an ASUS exclusive OS, which lets you instantly access the Internet and key applications before entering the Windows® OS. • ASUS Express Gate supports installation on SATA HDDs, USB HDDs and flash drives with at least 1.2GB free disk space. When installing it on USB HDDs or flash drives, connect the drives to the motherboard USB port before turning on the computer. • The actual boot time depends on the system configuration.
C.P.R. (CPU Parameter Recall) The BIOS C.P.R. feature automatically restores the CPU default settings when the system hangs due to overclocking failure. C.P.R. eliminates the need to open the system chassis and clear the RTC data. Simply shut down and reboot the system, and the BIOS automatically restores the CPU parameters to their default settings. Green ASUS This motherboard and its packaging comply with the European Union’s Restriction on the use of Hazardous Substances (RoHS).
1.4 Before you proceed Take note of the following precautions before you install motherboard components or change any motherboard settings. • Unplug the power cord from the wall socket before touching any component. • Before handling components, use a grounded wrist strap or touch a safely grounded object or a metal object, such as the power supply case, to avoid damaging them due to static electricity. • Hold components by the edges to avoid touching the ICs on them.
1.5 Motherboard overview Before you install the motherboard, study the configuration of your chassis to ensure that the motherboard fits into it. Ensure that you unplug the power cord before installing or removing the motherboard. Failure to do so can cause you physical injury and damage motherboard components. 1.5.1 Placement direction 1.5.2 Screw holes When installing the motherboard, ensure that you place it into the chassis in the correct orientation.
1.5.3 Motherboard layout 1 2 3 4 21.1cm(8.3in) KBMS USB3_12 LAN1_USB12 30.5cm(12.
1.6 Central Processing Unit (CPU) The motherboard comes with a surface mount LGA775 socket designed for the Intel® Core™2 Extreme / Core™2 Quad / Core™2 Duo / Pentium® dual-core /Celeron® dual-core processors. • Unplug all power cables before installing the CPU. • Connect the chassis fan cable to the CHA_FAN connector to ensure system stability. • Upon purchase of the motherboard, ensure that the PnP cap is on the socket and the socket contacts are not bent.
2. Press the load lever with your thumb (A), then move it to the left (B) until it is released from the retention tab. To prevent damage to the socket pins, do not remove the PnP cap unless you are installing a CPU. Retention tab A B Load lever 3. 4. Lift the load lever in the direction of the arrow to a 135º angle. PnP cap Load plate 4B Lift the load plate with your thumb and forefinger to a 100º angle (4A), then push the PnP cap from the load plate window to remove (4B). 4A 3 5.
6. Apply some Thermal Interface Material to the exposed area of the CPU that the heatsink will be in contact with, ensuring that it is spread in an even thin layer. Some heatsinks come with pre-applied thermal paste. If so, skip this step. DO NOT eat the Thermal Interface Material. If it gets into your eyes or touches your skin, ensure that you wash it off immediately, and seek professional medical help. To prevent contaminating the paste, DO NOT spread the paste with your finger directly. 7.
1.6.2 Installing the CPU heatsink and fan The Intel® LGA775 processor requires a specially designed heatsink and fan assembly to ensure optimum thermal condition and performance. • When you buy a boxed Intel® processor, the package includes the CPU fan and heatsink assembly. If you buy a CPU separately, ensure that you use only Intel®‑certified multi‑directional heatsink and fan. • Your Intel® LGA775 heatsink and fan assembly comes in a push-pin design and requires no tool to install.
3. Connect the CPU fan cable to the connector on the motherboard labeled CPU_FAN. CPU_FAN CPU FAN PWM CPU FAN IN CPU FAN PWR GND P5P41T/USB3 P5P41T/USB3 CPU fan connector Do not forget to connect the CPU fan connector! Hardware monitoring errors can occur if you fail to plug this connector. 1.6.3 Uninstalling the CPU heatsink and fan To uninstall the CPU heatsink and fan: 1. Disconnect the CPU fan cable from the connector on the motherboard. 2. Rotate each fastener counterclockwise. 3.
4. Carefully remove the heatsink and fan assembly from the motherboard. 5. Rotate each fastener clockwise to ensure correct orientation when reinstalling. 1.7 System memory 1.7.1 Overview DIMM_B1 DIMM_B2 DIMM_A1 DIMM_A2 This motherboard comes with four Double Data Rate 3 (DDR3) Dual Inline Memory Modules (DIMM) sockets. A DDR3 module has the same physical dimensions as a DDR2 DIMM but is notched differently to prevent installation on a DDR2 DIMM socket.
1.7.2 Memory configurations You may install 512MB, 1GB, 2GB, and 4GB unbuffered non‑ECC DDR3 DIMMs into the DIMM sockets. • You may install varying memory sizes in Channel A and Channel B. The system maps the total size of the lower-sized channel for the dual-channel configuration. Any excess memory from the higher-sized channel is then mapped for single-channel operation. • Always install DIMMs with the same CAS latency.
DDR3-1333 MHz capability Vendor SS/ DS Chip Brand Part No. Size Chip No. Timing A-Data AD31333001GOU 1024MB SS A-Data AD30908C8D-151C E0906 - A-Data AD31333G001GOU 3072MB (Kit of 3) SS - - A-Data AD31333002GOU 2048MB DS A-Data A-Data AD31333G002GMU 2048MB DS Apacer 78.A1GC6.9L1 2048MB DS CORSAIR CM3X1024-1333C9DHX 1024MB CORSAIR CM3X1024-1333C9 CORSAIR Voltage DIMM support A* B* C* - • • • 8-8-8-24 1.65-1.
DDR3-1333 MHz capability Vendor Part No. Size SS/ DS Chip Brand Chip No. Timing Voltage DIMM support A* B* C* G.SKILL F3-10666CL7T-3GBPK 3072MB (Kit of 3) SS - - 7-7-7-18 1.5~1.6V • • • G.SKILL F3-10666CL9T-3GBNQ 3072MB (Kit of 3) SS - - 9-9-9-24 1.5~1.6V • • G.SKILL F3-10600CL9D-2GBNQ 1024MB DS G.SKILL - - - • • G.SKILL F3-10666CL8D4GBECO(XMP) 4096MB (Kit of 2 ) DS - - 8-8-88-24 1.35V (low voltage) • • G.
DDR3-1333 MHz capability Vendor Part No. Size SS/ DS Chip Brand Chip No. Timing Voltage DIMM support A* B* OCZ OCZ3P1333LV4GK 4096MB (Kit of 2) DS - - 7-7-7-20 1.65V • • OCZ OCZ3RPX1333EB4GK 4096MB (Kit of 2) DS - - 6-5-5-20 1.85V • • OCZ OCZ3X13334GK(XMP) 4096MB (Kit of 2) DS - - 7-7-7-20 1.75V • • OCZ OCZ3G1333LV6GK 6144MB (Kit of 3 ) DS - - 9-9-9-20 1.65V • • OCZ OCZ3P1333LV6GK 6144MB (Kit of 3 ) DS - - 7-7-7-20 1.
1.7.3 Installing a DIMM Unplug the power supply before adding or removing DIMMs or other system components. Failure to do so can cause severe damage to both the motherboard and the components. 2 To install a DIMM: DIMM notch 1. Press the retaining clips outward to unlock a DIMM socket. 2. Align a DIMM on the socket such that the notch on the DIMM matches the DIMM slot key on the socket. 1 1 DIMM slot key Unlocked retaining clip A DIMM is keyed with a notch so that it fits in only one direction.
1.8 Expansion slots In the future, you may need to install expansion cards. The following sub‑sections describe the slots and the expansion cards that they support. Unplug the power cord before adding or removing expansion cards. Failure to do so may cause you physical injury and damage motherboard components. 1.8.1 Installing an expansion card To install an expansion card: 1.
1.9 1. Jumpers Clear RTC RAM (3-pin CLRTC) This jumper allows you to clear the Real Time Clock (RTC) RAM in CMOS. You can clear the CMOS memory of date, time, and system setup parameters by erasing the CMOS RTC RAM data. The onboard button cell battery powers the RAM data in CMOS, which include system setup information such as system passwords. CLRTC P5P41T/USB3 1 2 2 3 Normal (Default) Clear RTC P5P41T/USB3 Clear RTC RAM To erase the RTC RAM: 1. Turn OFF the computer and unplug the power cord. 2.
1.10 Connectors 1.10.1 Rear panel connectors 1 2 11 10 4 5 3 9 8 6 7 1. PS/2 Mouse port (green). This port is for a PS/2 mouse. 2. Parallel port. This 25-pin port connects a parallel printer, a scanner, or other devices. 3. LAN (RJ-45) port. This port allows Gigabit connection to a Local Area Network (LAN) through a network hub. Refer to the table below for the LAN port LED indications.
7. USB 2.0 ports 1 and 2. These two 4-pin Universal Serial Bus (USB) ports are available for connecting USB 2.0 devices. 8. USB 3.0 ports 1 and 2. These two 4-pin Universal Serial Bus (USB) ports are available for connecting USB 3.0 devices. 9. Optical S/PDIF Out port. This port connects an external audio output device via an optical S/PDIF cable. 10. COM port. This 9-pin COM1 port is for pointing devices or other serial devices. 11. PS/2 Keyboard port (purple). This port is for a PS/2 keyboard.
2. ATX power connectors (24-pin EATXPWR, 4-pin ATX12V) These connectors are for ATX power supply plugs. The power supply plugs are designed to fit these connectors in only one orientation. Find the proper orientation and push down firmly until the connectors completely fit.
4. Serial ATA connectors (7-pin SATA1-6) These connectors are for the Serial ATA signal cables for Serial ATA 3Gb/s hard disk and optical disk drives. The Serial ATA 3Gb/s is backward compatible with Serial ATA 1.5Gb/s specification. The data transfer rate of the Serial ATA 3Gb/s is faster than the standard parallel ATA with 133 MB/s (Ultra DMA133).
6. IDE connector (40-1 pin PRI_IDE) The onboard IDE connector is for the Ultra DMA 133/100/66 signal cable. There are three connectors on each Ultra DMA 133/100/66 signal cable: blue, black, and gray. Connect the blue connector to the motherboard’s IDE connector, then select one of the following modes to configure your device.
7. System panel connector (20-8 pin PANEL) This connector supports several chassis-mounted functions. +5V Ground Ground Speaker SPEAKER PLED- PLED+ PLED PANEL P5P41T/USB3 IDE_LED PWRSW Reset Ground IDE_LED+ IDE_LED- PWR Ground PIN 1 RESET * Requires an ATX power supply P5P41T/USB3 System panel connector • System power LED (2-pin PLED) • This 2-pin connector is for the system power LED. Connect the chassis power LED cable to this connector.
8. USB connectors (10-1 pin USB56, USB78) These connectors are for USB 2.0 ports. Connect the USB module cable to any of these connectors, then install the module to a slot opening at the back of the system chassis. These USB connectors comply with USB 2.0 specification that supports up to 480 Mbps connection speed. PIN 1 USB+5V USB_P7 USB_P7+ GND PIN 1 USB+5V USB_P5USB_P5+ GND P5P41T/USB3 USB+5V USB_P8USB_P8+ GND NC USB78 USB+5V USB_P6USB_P6+ GND NC USB56 P5P41T/USB3 USB2.
1.11 Software support 1.11.1 Installing an operating system This motherboard supports Windows® XP / Vista / 7 Operating Systems (OS). Always install the latest OS version and corresponding updates to maximize the features of your hardware. • Motherboard settings and hardware options vary. Refer to your OS documentation for detailed information.
Chapter 2 BIOS information 2.1 Managing and updating your BIOS Save a copy of the original motherboard BIOS file to a USB flash disk in case you need to restore the BIOS in the future. Copy the original motherboard BIOS using the ASUS Update utility. 2.1.1 ASUS Update utility The ASUS Update is a utility that allows you to manage, save, and update the motherboard BIOS in Windows® environment. • ASUS Update requires an Internet connection either through a network or an Internet Service Provider (ISP).
The ASUS Update utility is capable of updating itself through the Internet. Always update the utility to avail all its features. Updating from a BIOS file 3. a. Select Update BIOS from a file, then click Next. b. Locate the BIOS file from the Open window, then click Open. Follow the onscreen instructions to complete the updating process. 2.1.2 ASUS EZ Flash 2 The ASUS EZ Flash 2 feature allows you to update the BIOS without using an OS‑based utility.
• This function supports USB flash disks with FAT 32/16 format and single partition only. • DO NOT shut down or reset the system while updating the BIOS to prevent system boot failure! 2.1.3 ASUS CrashFree BIOS 3 The ASUS CrashFree BIOS 3 is an auto recovery tool that allows you to restore the BIOS file when it fails or gets corrupted during the updating process. You can restore a corrupted BIOS file using the motherboard support DVD or a removable device that contains the updated BIOS file.
2.2 BIOS setup program Use the BIOS Setup program to update the BIOS or configure its parameters. The BIOS screens include navigation keys and brief online help to guide you in using the BIOS Setup program. Entering BIOS Setup at startup To enter BIOS Setup at startup: • Press during the Power-On Self Test (POST). If you do not press , POST continues with its routines. Entering BIOS Setup after POST To enter BIOS Setup after POST: • Press ++ simultaneously.
2.2.
2.2.3 Navigation keys At the bottom right corner of a menu screen are the navigation keys for that particular menu. Use the navigation keys to select items in the menu and change the settings. Some of the navigation keys differ from one screen to another. 2.2.4 Menu items 2.2.5 Submenu items 2.2.6 Configuration fields 2.2.7 Pop-up window The highlighted item on the menu bar displays the specific items for that menu. For example, selecting Main shows the Main menu items.
2.3 Main menu When you enter the BIOS Setup program, the Main menu screen appears, giving you an overview of the basic system information. Refer to section 2.2.1 BIOS menu screen for information on the menu screen items and how to navigate through them.
LBA/Large Mode [Auto] Enables or disables the LBA mode. Setting to [Auto] enables the LBA mode if the device supports this mode, and if the device was not previously formatted with LBA mode disabled. Configuration options: [Disabled] [Auto] Block (Multi-sector Transfer) M [Auto] Enables or disables data multi-sectors transfers. When set to [Auto], the data transfer from and to the device occurs multiple sectors at a time if the device supports multi-sector transfer feature.
The following item appears only when ATA/IDE Configuration is set to [Compatible]. Legacy IDE Channels [PATA Pri, SATA Sec] Allows you to select the IDE ports to use when you select Primary P-ATA+S-ATA only to support SATA 3 and SATA 4’s combined modes. Configuration options: [SATA Only] [PATA Pri, SATA Sec] [PATA Only]. IDE Detect Time Out (Sec) [35] Selects the time out value for detecting ATA/ATAPI devices. Configuration options: [0] [5] [10] [15] [20] [25] [30] [35] 2.3.
2.4.1 JumperFree Configuration The items in this menu allows you to adjust the system frequency/voltage. PCI/PCIe CLK Status [Enabled] Allows you to enable or disable the clock for the PCI or PCIe slot. Configuration options: [Enabled] [Disabled] Ai Overclocking [Auto] Allows selection of CPU overclocking options to achieve desired CPU internal frequency. Select either one of the preset overclocking configuration options: Manual - allows you to individually set overclocking parameters.
The following table shows the DRAM Frequency options that appear when the FSB value is 1333, 1066, and 800. FSB DRAM Frequency Auto 800MHz 960MHz 1333 v v 1000MHz 1067MHz v 1066 v v v 800 v v 1100MHz 1333MHz v Selecting a very high DRAM frequency may cause the system to become unstable! If this happens, revert to the default setting. Memory Voltage [Auto] Allows you to adjust Memory Over voltage and each step is 10mV. NB Voltage [Auto] Allows you to set the Northbridge voltage.
2.4.2 CPU Configuration The items in this menu show the CPU-related information that the BIOS automatically detects. Ratio CMOS Setting [Auto] Sets the ratio between CPU core clock and the FSB frequency. Key in ratio numbers directly. If an invalid ratio is set in CMOS, then the actual and set values may differ. C1E Support [Enabled] Allows you to enable or disable the Enhanced Halt State function.
2.4.3 Chipset The Chipset menu allows you to change the advanced chipset settings. Select an item then press to display the submenu. North Bridge Configuration Memory Remap Feature [Enabled] Allows you to enabled or disable the remapping of the overlapped PCI memory above the total physical memory. Enable this option only when you install 64-bit operating system.
Parallel Port Mode [ECP] Allows you to select the Parallel Port mode. Configuration options: [Normal] [Bi-Directional] [EPP] [ECP] ECP Mode DMA Channel [DMA3] Appears only when the Parallel Port Mode is set to [ECP]. This item allows you to set the Parallel Port ECP DMA. Configuration options: [DMA0] [DMA1] [DMA3] Parallel Port IRQ [IRQ7] Allows you to select parallel port IRQ. Configuration options: [IRQ5] [IRQ7] Onboard USB 3.0 Controller [Enabled] Enables or disables the USB 3.0 controller.
2.4.6 PCI PnP The PCI PnP menu items allow you to change the advanced settings for PCI/PnP devices. The menu includes setting IRQ and DMA channel resources for either PCI/PnP or legacy ISA devices, and setting the memory size block for legacy ISA devices. Be cautious when changing the settings of the PCI PnP menu items. Incorrect field values can cause the system to malfunction. Plug and Play O/S [No] When set to [No], BIOS configures all the devices in the system.
2.5.3 ACPI APIC Support [Enabled] 2.5.4 Anti Surge Support [Enabled] 2.5.5 APM Configuration Allows you to enable or disable the Advanced Configuration and Power Interface (ACPI) support in the Application-Specific Integrated Circuit (ASIC). When set to Enabled, the ACPI APIC table pointer is included in the RSDT pointer list. Configuration options: [Disabled] [Enabled] Allows you to enable or disable the over-voltage protection function.
2.5.6 Hardware Monitor CPU Temperature [xxxºC/xxxºF] or [Ignored] MB Temperature [xxxºC/xxxºF] or [Ignored] The onboard hardware monitor automatically detects and displays the motherboard and CPU temperatures. Select Ignored if you do not wish to display the detected temperatures. CPU Fan Speed [xxxxRPM] or [Ignored] Chassis Fan Speed [Ignored] or [N/A] The onboard hardware monitor automatically detects and displays the CPU/Chassis fan speeds in rotations per minute (RPM).
2.6 Boot menu The Boot menu items allow you to change the system boot options. Select an item then press to display the sub-menu. Main Advanced Power P5P41T/USB3 BIOS Setup Boot Tools Exit Boot Settings Boot Device Priority Boot Settings Configuration Security 2.6.1 Version 0306 Specifies the Boot Device Priority sequence. A virtual drive (Drive B:) may appear when you set the CD-ROM drive as the first boot device.
Wait For ‘F1’ If Error [Enabled] When set to Enabled, the system waits for the F1 key to be pressed when error occurs. Configuration options: [Disabled] [Enabled] Hit ‘DEL’ Message Display [Enabled] When set to [Enabled], the system displays the message Press DEL to run Setup during POST. Configuration options: [Disabled] [Enabled] 2.6.3 Security The Security menu items allow you to change the system security settings. Select an item then press to display the configuration options.
Change User Password Select this item to set or change the user password. The User Password item on top of the screen shows the default Not Installed. After you set a password, this item shows Installed. To set a User Password: 1. Select the Change User Password item and press . 2. On the password box, key in a password containing up to six letters, or numbers, or both, then press . 3. Confirm the password when prompted.
2.7.2 Express Gate [Auto] Allows you to enable or disable the ASUS Express Gate feature. The ASUS Express Gate feature is a unique instant-on environment that provides quick access to the Internet browser and Skype. Configuration options: [Enabled] [Disabled] [Auto] Enter OS Timer [10 Seconds] Sets countdown duration that the system waits at the Express Gate’s first screen before starting Windows or other installed OS. Choose [Prompt User] to stay at the first screen of Express Gate for user action.
Exit & Save Changes Once you are finished making your selections, choose this option from the Exit menu to ensure the values you selected are saved to the CMOS RAM. An onboard backup battery sustains the CMOS RAM so it stays on even when the PC is turned off. When you select this option, a confirmation window appears. Select OK to save changes and exit. Exit & Discard Changes Select this option only if you do not want to save the changes that you made to the Setup program.
ASUS contact information ASUSTeK Computer Inc. Address Telephone Fax E-mail Web site Technical Support Telephone Online support 15 Li-Te Road, Peitou, Taipei, Taiwan 11259 +886-2-2894-3447 +886-2-2890-7798 info@asus.com.tw www.asus.com.tw +86-21-38429911 support.asus.com ASUS Computer International (America) Address Telephone 800 Corporate Way, Fremont, CA 94539, USA +1-510-739-3777 Fax Web site +1-510-608-4555 usa.asus.
(510)739-3777/(510)608-4555 800 Corporate Way, Fremont, CA 94539. Asus Computer International Date : Signature : Representative Personʼs Name : Mar. 23, 2010 Steve Chang / President This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
