Legit Reviews has grabbed 7 different companies 800Mhz DIMMs, and put them all to a test to see who is fastest, the best overclocker, and which has the best price for it’s performance.  Give it a read.
“Legit Reviews has recently had the opportunity to look over SEVEN PC2-6400 memory kits from some of the most popular enthusiast brand lines here in North America. Our three memory kits came from A-DATA, Corsair, Crucial, Kingston, Mushkin, OCZ, and SyncMAX. All of the kits are rated at PC2-6400 or DDR2 800MHz and are meant to be used in overclocking situations. While all seven brands are rated at 800MHz, this is where the similarities end…”

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