Essentially, I had 2GB (2x 1GB) of Corsair DDR2 800MHz RAM in my machine, running at 2.1V with 4-4-4-12 timings and this has been stable for the last eight months. Now, I purchased some RAM which arrived yesterday, which is 2GB (1x 2GB) Corsair DDR2 800MHz RAM with timings of 5-5-5-12 at 1.9V...