In order to test SuperTalent PC2-6400 we used the following setup:

• CPU: Intel XE6600 @ 2.4GHz
• Motherboard: Asus P5B Deluxe Wi-Fi Edition BIOS 0903 (beta)
• PSU: OCZ GameXStream GXS600 SLI-Ready
• VGA: MSI 7600GT Silent (stock memory/core timings)
• HDD: WD 800JB
• OS: Windows XP SP2 with all the latest updates installed

While for benchmarking we used:

• Memtest86+ v1.65
• Sisoft Sandra 2007 SP1
• RightMark Memory Analyzer v3.70
• Pov-Ray v3.7 Beta15
• SuperPI XS Mod v1.50
  

The Asus P5B Deluxe offers various CPU:RAM ratio locks and high overclocking tuning precision. With CPU-Z we can check the properties of the memory modules. Note that the embedded timings are rather "slow". You can achieve much faster results with manual settings and appropriate testing:

For all tests, we manually set the FSB to 266MHz. That allowed the CPU to run at 2.40GHz and we then used the various built-in CPU:RAM ratios to underclock/overclock the memory:

Each CPU:RAM ratio offers different performance which was benchmarked with various software. For each setting, we tried to find the most aggressive timings that offer the best possible performance. Each setting, before being benchmarked, had to pass a 30min test with Memtest86+ v1.65 without causing any errors. All benchmarks were doubly confirmed and all displayed results are the average number of both measurements.

- Overclocking

The user has to manually set aggressive timings and memory voltages. All tests were carried out with 2.25V, since the Asus P5B Deluxe doesn't offer 2.20V setting. Below are the best timings we managed to get and the effective frequency of each memory speed:

The test results are impressive. The T800UX2GC4 is being sold as a DDR2 800 kit. However, it can easily reach DDR2 960 without requiring a very high memory voltage. We tried to reach 1000MHz, however we couldn't maintain a stable system, either with relaxed timings (5-5-5-15) or by increasing memory voltage (up to 2.45V). Nevertheless, the overclocking results are very good and will please enthusiast overclockers...