Corsair TwinX2048-4000PT - PCStats
PCStats posted a review of the Corsair TwinX2048-4000PT memory modules. These modules have 1GB memory each and they overclock very well. PCStats writes in the conclusion:
[...] these modules are a good choice for anyone looking to make the 2GB transition, but who still want to overclock their memory for that ‘extra’ performance edge. [...]
Read here for more information and different benchmark results.