Overclocking DDR2 memory on the AMD Athlon64 Socket AM2 platform is
more challenging due to a memory divider issue PCSTATS highlighted in this article. With these limitations, we could only employ even-numbered multipliers when overclocking the Crucial Ballistix PC2-6400 DDR2 memory.
To begin with, the CPU divider was set to 8x and the CAS latency memory timings set to 4-4-4-12. The motherboard clock frequency was increased in 4-6 MHz intervals for the duration of the overclocking tests, from the 200MHz starting point.
The Crucial PC2-6400 DDR-2 memory quickly passed the 220
MHz point, but thereafter required a little more voltage to remain stable
(it was increased to 1.9V from 1.8V). At 236 MHz the system started to BSOD while loading into WindowsXP, and again required the voltage to be increased to 2.0V to keep the overclocking going.
In the end the set of Crucial Ballistix PC2-6400 memory maxed out at a speed of 260 MHz (1040 MHz memory frequency) with low latency timings of 4-4-4-12 and a supplied memory voltage of 2.2V. Any settings higher than this resulted in random BSOD's while running evaluation benchmarks.
Since this is DDR2 memory, PCSTATS also tested high the
memory would overclock with really loose 5-5-5-15 timings. For this, 2.2V
was supplied and the Crucial Ballistix PC2-6400 was pushed to the socket
AM2 Foxconn C51XEM2AA motherboard's top speed of 276 MHz (1104 MHz memory frequency).
Prelude to Benchmarks
The details of how the Crucial Ballistix PC2-6400 memory test system
was configured for benchmarking, including the specific hardware, software
drivers, operating system and benchmark versions are indicated below. In
the second column are the general specs for the reference platforms this pair of
PC2-6400 DDR-2 memory is to be compared against. Please take a moment to look over
PCSTATS test system configurations before moving on to the individual benchmark
|PCSTATS Test System Configurations|