RAM choice HELP!

It's usually better to select modules that require 1.8V-1.9V.

Modules with tighter timings and/or lower voltage requirements than your selections:

G.Skill PI Black: http://www.newegg.com/Product/Prod [...] 6820231209

G.Skill HK: http://www.newegg.com/Product/Prod [...] 6820231219

Chislain between the links which one would you recommend me because I can't choose???? Thanks.

Certainly less than modules that require higher voltages. I run 8 GB of G.Skill PI black and the system is stable. All modules that you chose are DDR2 800 MHz. You can always run them at a higher frequency, but you'll need to loosen the timings.

Lower voltage is better simply because you can increase it if need be. If you select modules that already require over 2.0V, your margins are smaller. A good example of what manufactures do is this other G.Skill kit: http://www.newegg.com/Product/Prod [...] 6820231216

It most likely is identical to the PI Black DDR2 800 kit, but they increased the voltage requirement by .2V and set the timings to 4-5-4-12 instead of 4-4-4-12.

I would buy the PI Black over the HK because the PI Black should cool a bit better. I have 8 GB of PI Black and it runs very stable at 1.9V. It also runs quite good at 1.8V, but I had one crash after 3 months and that's why I increased the voltage to 1.9V. To be honest, you can safely assume that the highest recommended voltage is required to ensure maximum stability.

If it runs on a UD3P, then it will also run on a UD3R. CL4 is faster, but you need to run benchmarks to tell the difference. On the other hand, that same memory will run at 5-5-5-15 and 1.8V by default and at 4-4-4-12 if you select EPP in the BIOS. It will run no matter what Core 2 CPU you use.

High end to me is a computer with dual Xeon 5570.

You just set the memory profile to EPP #1 and it automatically selects the correct voltage and timings.

If it doesn't, then set the timings and voltage manually. Unless you run benchmarks, you'll never notice the difference.

I have 8 GB of G.Skill PI Black in one system (GA-EP45-UD3P) and 8 GB of older G.Skill http://www.newegg.com/Product/Prod [...] CL4D-4GBPK in another system (P5Q Deluxe). The other systems have slower RAM. You should never mix memory; all modules should be identical. If you plan on installing 8 GB, then get all of it now. I need 8 GB to run VMs.

What if I do like a bios update or something will that make everything default? Thanks.Ok now I'm into asking if I rather get a 1066CL5 than a 800CL4? I heard that for AMD CL matters most and for Intel bandwidth matters most. If it is true that if I get Intel and a 1066mhz CL5 would perform better and in games than a 800MHZ CL4 then can you recommend me any of that as I see plenty of g skills for the same price at higher bandwidth? Thanks.

Ok how much percent difference would it be if it was 800mhz CL5 vs 1066 mhz CL 5 so both CL5 ? And how much percent would it be Between 800mhz CL4 and 1066mhz CL5? As for I know that 800mhz CL4 is 2-4% better than 800 mhz CL 5 as you have said 1-3 almost the same thing can you answer the questions please. Thanks

Ok Thanks. So I guess I will just get an 800mhz CL5 Ram. Thanks.

Well Thanks. But I just want ones as cheap as possible. As PI Black is 55 and I found some for 47 at CL 5 800mhz. And I don't plan on changing anything in bios but maybe just a slight CPU overclock without touching anything else just FSB which won't change the ram. But thanks.