First time builder looking for some expert advice with memory.
I am trying to build a mid to upper level build, I have antec 900 case, q6600 processor, 680i lt Mobo and PC&P 750 Power Supply. I plan on adding 2 8800gt's this week.
I have never been one to Overclock, but am open to try it in the future. I was going to do XP as an OS, but I seen a few people on here using vista so they can use more memory. So I ask three questions.
Vista or XP? Only reason I would use vista is for the memory.
8 gigs or 4?
How important is it to have CAS latency 4 instead of 5.
I would go with XP 32-bit and 4 Gigs of memory.
8 Gigs is more for like a server.
You could go with Vista 64-bit and 8 Gigs.
CAS 4 is a little faster, but you can always overclock CAS 5 to 4 and run memtest86+ or Prime95 to check for errors. Most likely it will work. You may have to up the voltage to 2.0 or 2.1.
I can't see your links at the moement. I would go with DDR-2 800, which gives you plenty of room to overclock or put in a faster processor.
Myself, I go with the lower CL rate ram, unless it considerably more expensive, which it is not. Currently using 4 gigs corsair CL4 PC6400 with dual boot xp pro & vista 32 Bus.
I don't think you will see a big difference on gpu intensive games. More of an effect on CPU/memory intensive games and maybe a 15% inprovement in video encoding. Basicly CL4 only requires 4 clock pulses vs 5 for CL5, But Don't think you will get the full 20 % improvement because memory is only part of the equation.
CL4 generally easier to achieve overclock. I'm running with Bus at 400 MHz and a 1::1 ration (3.2 GHz on E6400)