Quote: Originally Posted by Antman
I decided on an Intel E6700, Asus P5B Deluxe WiFi. I read in the Asus literature about Kingston HyperX PC8500 running at 1066 and paid about $270 for 2GB. About a year later, the next 2GB kit only cost me about $80.
Not once have I been able to run this RAM at 1066. It's SPD is 800 and all variations of overclocking crash the RAM after about 900. I even discovered this forum as a result of searching for clues on how to achieve 1066.
Maybe I'm confused here...but doesn't the Intel E6700 CPU run on a 1066 front side bus? And the Intel FSB is quad-pumped, so if we divide 1066 by 4, we end up with 266Mhz. So, in the event of DDR2 RAM...the FSB speed of 266 x 2 = 533Mhz...would put the RAM at a 1:1 ratio with the CPU.
It's my understanding that the CPU and the RAM aren't going to communicate any faster than the Front Side Bus speed will allow. I think you are confusing the FSB speed total of 1066 with your RAM speed of 1066...since the FSB speed is 4x and the ram speed is 2x.
Technically, with your DDR2 1066 ram, if you divide 1066 by 2 you would get 533Mhz. So, you should be able to effectively run your FSB at 533Mhz and if it were quad-pumped that would be a FSB speed of 2133 in order to run that at the full rated speed.
So, with your CPU running at stock clock speeds (no overclocking) DDR2 533 RAM would have been fast enough to run as fast as your system could possibly go. DDR2 667 would have given you some heardroom for overclocking your CPU a bit (up from 266 to 333) and DDR2 800 would have given you the ability to up your CPU even more (from 266 to 400) while still running at 100% the speed of your system.
Somebody can correct me if I am wrong.