Datasheet
Datasheet Volume 2 of 2 13
Intel Xeon Processor E7-8800/4800/2800 Product Families Architecture
2 Intel Xeon Processor E7-8800/
4800/2800 Product Families
Architecture
2.1 Introduction
The Intel Xeon Processor E7-8800/4800/2800 Product Families support up to ten-cores
with up to 30-MB shared last-level cache (LLC) and two on-chip memory controllers. It
is designed primarily for glueless four- or eight-socket multiprocessor systems, and
features four Intel QuickPath Interconnects and four Intel
SMI channels.
The Intel
®
Xeon
®
processor 7500 series-based platform supports four fully-connected
Intel Xeon Processor E7-8800/4800/2800 Product Families sockets, where each Intel
Xeon Processor E7-8800/4800/2800 Product Families use three Intel QuickPath
Interconnects to connect to the other sockets and a fourth Intel QuickPath Interconnect
can be connected to an IO Hub (IOH) or an eXternal Node Controller (XNC) to expand
beyond a four-socket configuration. The Intel Xeon Processor E7-8800/4800/2800
Product Families maintain cache coherence at the platform level by supporting the Intel
QuickPath Interconnect source broadcast snoopy protocol.
The Intel Xeon Processor E7-8800/4800/2800 Product Families are designed to support
Intel QuickPath Interconnects at speeds of 4.8, 5.86 and 6.4 GT/s and DDR3-800, 978
and 1067 MHz memory speeds. It uses a power-through-the-pins power delivery
system and LS socket.
Comparison of some key features of the Intel Xeon Processor E7-8800/4800/2800
Product Families, and Intel
®
Xeon
®
Processor 7500 series are listed in Tab l e 2-1 .
Table 2-1. Intel
®
Xeon
®
Processor E7-8800/4800/2800 Product Families and Intel
®
Xeon
®
Processor 7500 Series Key Features (Sheet 1 of 2)
Features
Intel® Xeon®
Processor 7500
Series
Intel® Xeon®
Processor E7-
8800/4800/2800
Product Families
Comments
Number of cores/threads per core 8/2 10/2 Total of 20 threads
Lowest-Level Cache (LLC) 24 MB 30 MB Inclusive shared cache
Physical Address 44 bits
Intel QuickPath Interconnect
speeds
4.8/5.86/6.4 GT/s 4.8/5.86/6.4 GT/s Two high-performance
connectors, plus maximum
of 17" FR4 trace length
Memory Speed DDR3-800, DDR3-
978, DDR3-
1067 MHz
DDR3-800, DDR3-
978, DDR3-
1067 MHz
Power Delivery PTP PTP Power-Through-the-Pins
Power TDP 130W, 105W, 95W 130 W, 105W, 95W
ACPI states C0, C1, C1e, C3,
P-State
S0/S4
C0, C1, C1E, C3, C6
P-State S0/S4
C1: halt, All cores halted;
V/f scale to min. voltage,
C3, C6
Caching agents per socket 2 2 Each caching agent handles
1/2 of the address space