Test Setup

Here you can see the system we tested on.


All parts are selected with high performance and good overclockability in mind to reach high test results. We used BIOS 510-FIX2 (updated version of Mushkin's recommended 510-2) for the DFI LanParty nForce4 SLI-D.

All AlphaTimings in the Bios were set to auto, except for:

• CPC - Enabled
• DRAM bank Interleaving - Enabled
• Idle Cycle Limit - 256
• Dynamic Counter - Enabled
• R/W Queue Bypass - 16x
• Bypass Max - 07x.
• TRAS - 5
• TRC - 7
• TRFC - 14

For JEDEC DDR400A Benchmarks all alpha timings were set to auto.

Testing

Very good results, but a motherboard with enough VDIMM is required.
Reduced latencies did not give much overclocking headroom. This shows, that this memory is designed for low latencies. Faster than DDR500 with tight timings is very fast, compared to 2.5-3-3-7.
In the factory, the SPD Timings were not set to the correct values of 2-2-2-5 for DDR500. They were set to 2-3-2-6 for DDR400. Those are the best possible timings for DDR400 using 2.6V. So it's not completely wrong.


265 MHz @ 2-2-2-5 (3.5V)

Benchmarks

For easier comparison with other modules, we set a maximum voltage of 3.1V und tested until we found the highest clock frequency and fastest timings for this memory. The Benchmarks Everest Read, Everest Write and Quake 3 were run. We then calculated the performance increase in percent compared to some standard DDR400 memory running at JEDEC DDR400A (2.5-3-3-8). The average percentage of the three benchmarks is listed in following table: