User guide

NVIDIA nForce 590 SLI Technology Chipset Overclocking
DU-02451-001_v01 17
05/17/06
CPU Core Clock
This section discusses how to effectively increase the CPU core clock of the AMD
Athlon FX-62 CPU on NVIDIA nForce 590 SLI chipset. Before you proceed to
overclock the CPU core clock, eliminate all other sources of system instability. Do
so by keeping memory and CPU HyperTransport frequencies low.
Use the following procedure to overclock the FX-62 CPU:
1. Go to the
System Voltages BIOS menu to change the following voltages (so
they have exactly the same values as shown in Figure 5):
¾
CPU core voltage
¾ HyperTransport interface core voltage,
HT CPU <-> nForce SPP
¾ NVIDIA nForce 590 SLI SPP core voltage,
nForce SPP and nForce MCP
2. Set memory frequency as low as possible from the
Memory Timings BIOS
menu so they have exactly the same values as shown in Figure 4.
a) Set
Timing Mode to [User limit].
b) Set
Memory Clock Limit to [DDR2 400].
3. Change the
System Clocks settings to the values shown in Figure 10.
a) Change the
CPU Multiplier to x12 (for FX-62 CPU, this value is
sufficient; for other AM2 CPUs x5 will work) in
System Clocks BIOS
menu.
b) Change
CPU <-> nForce SPP multiplier to x3.
c) Set the Ref Clock
(HTT) to 200 MHz as a starting point.