Overclocking PC2-5300 class DDR-2 memory is more
challenging because of the CPU multiplier issue documented earlier. With that in mind, the first thing PCSTATS did was increase the memory divider to run at DDR2-800 mode... unfortunately that caused the computer to not POST. Increasing the voltage all the way up to 2.2V did nothing to effect change, so we were forced to lower the multiplier to 11x and keep the DDR2-667 setting. From there the motherboard was increased in 4-6 MHz intervals.
Ballistix PC2-5300 memory handled moderate overclocking steps much better, and with this approach the board reached a speed of 226 MHz (709 MHz memory frequency). To get there, the voltage had to be increased slightly to 2.0V to maintain stability. At 250 MHz motherboard clock speed (780 MHz memory) the Crucial Ballistix PC2-5300 memory was given another voltage boost, this time to 2.1V.
Eventually the maximum speed the Crucial Ballistix
PC2-5300 memory ran at was 252 MHz (790 MHz), anything higher and the system would simply refuse to boot. Another quick test was done with the Crucial Ballistix PC2-5300 using loose memory timings. With a CAS latency of 5-5-5-15 dialed in, and a 252 MHz motherboard clock speed it will be interesting to see how the PC2-5300 DDR-2 reacts...
The motherboard clock speed was bumped up in 4-6 MHz, with 2.2V, but even with the lax 5-5-5-15 timings 266 MHz (836 MHz) was the fastest we could push the Crucial Ballistix PC2-5300 1GB modules.
Prelude to Benchmarks
The details of how the Crucial Ballistix PC2-5300 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 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|