Verdict: DDR2 that fails to run at its rated speed

Like all HyperX kits, the DIMMs that make up the KHX6400D2LLK2/2G are dressed up in lightning-blue heatspreaders. Unfortunately, these heatspreaders don't appear to help overclocking.

This kit is rated as PC2-6400, which means that it's guaranteed to run at up to 800MHz at 4 - 4 - 4 - 12 latency timings at 1.95V. Strangely, the KHX6400D2LLK2/2G refused to POST at these settings in our Core 2 test rig, and would only work stably with the frequency reduced to 667MHz. We contacted Kingston's tech support team about this issue, and it confirmed that it hadn't tested this kit with the Asus P5B Deluxe motherboard and were therefore unable to help us.

However, in our Athlon 64 test rig, the KHX6400D2LLK2/2G behaved perfectly, POSTing and running stably at 800MHz with 4 - 4 - 4 - 12 latency timings. Although the KHX6400D2LLK2/2G performed almost identically to the KHX5400D2K2/2G in the Paint Shop Pro and F.E.A.R. benchmarks, it was noticeably faster in the SuperPI 32M test, no doubt due to its higher bandwidth.

Like the other HyperX kits in this Labs test, the KHX6400D2LLK2/2G refused to overclock beyond its guaranteed settings. This makes the KHX6400D2LLK2/2G extremely poor value for money, especially as it wouldn't even run at 800MHz in our Core 2 test rig.

• Cases - 21st November 2008
• Motherboards - 24th October 2008
• Gaming Headsets - 26th September 2008
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• Headphones - 12th September 2008
• Media PC components - 22nd August 2008
• PSUs - 14th July 2008

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