Alright. The point of this thread is to dispel the myths, rumors, misconceptions, and insecurities people have in regards to 1T vs 2T timings and memory speed. Hopefully this will cause less threads asking for "memory that does 1T" and people worrying over the 4x double sided dimms issue. This benchmark is with a Socket 754 Clawhammer at 2.5GHz. One setting I used was 10x250MHz 1:1. The other was 11x227 5:6 with 192MHz ram speed. And Sciencemark 2.0: Code: 10x250 1T Mol Dyn 929.63 Primidoria 811.37 cipher bench 1008.29 blas bench 1192.42 10x250 2T Mol Dyn 833.31 Primidoria 804.80 cipher bench 984.38 blas bench 1012.97 11x227 1T Mol Dyn 953.12 Primidoria 859.01 cipher bench 1158.53 blas bench 1199.84 11x227 2T Mol Dyn 830.57 Primidoria 850.04 cipher bench 1131.82 blas bench 1185.05 So aside from memory specific benchmarks, we see the greatest performance hit from latency and memory bandwidth in gaming and Molecular Dynamics. In 10x250, we lose 3% Aquamark performance when switching to 2T. In 10x227, we lose 4.5% Aquamark performance when switching to 2T. Not a very big deal if getting 2 gigs means having to use 2T. Counterstrike lost a relatively small amount of framerate, especially since I ran the benchmark with a +15 LOD bias, 640x480 resolution, and bare minimum detail. To give you an idea of image quality: Yeah. Ouch. So in higher resolutions, when the GPU is actually stressed, I don't think you'll even feel the hit. Also, since many people are finding Socket 939 systems to be rewarding with their dual cores and dual channel and dual PCI-E, there will be even less of a hit due to the almost doubled write bandwidth. As for molecular dynamics, well, hopefully if you're going to be messing with that, your university will back you up with a nice computer anyway.