OCZ claims its DDR2 PC2-9200 Flex II 4GB series is the world's fastest 4GB kit money can buy. It features the Flex II cooling kit which allows you to water cool the RAM if you are going for ultra high clocks. The package even includes 40" plastic tubing, 4-way manifold barb and 3/8" and 1/2" barb adaptors.
![](https://www.tweaktown.com/images/imagebank/news_oczflexIIddr2fast-01a_full.jpg)
Working at 2.1 volts, the two 2GB RAM modules will clock up to 1150MHz DDR in Dual Channel at relatively good timings of 5-5-5-18. OCZ's Lifetime Warranty is also thrown in for good measure. No details on pricing just yet but expect to pay a fair chuck.
You can read more over at the OCZ product page for more details.