Which would run better 4 Gigs of ddr2 800 G Skiel Ram or 2 Gigs DDR2 1066 Corsair Dominators?

Whats the advantage.

I would say 4 gigs of anything over 2gigs. I never found the speed of ram to affect anything performance wise.

I'm probably wrong, so don't listen to me.

Input is Input, Thanks for it!

Unless you are running things that require more than 2gb, I would go with the faster RAM. Here is the logic....

1066 > 800: Small difference in FSB may not make a noticeable difference. 266mhz is not small. As a matter of fact that is over a 25% increase in the speed of the FSB.

BIOS: Depending upon the BIOS of the motherboard you may not be able to have the RAM run at one speed and the CPU and rest of the system at another. Therefore using 800mhz RAM may limit the speed your CPU can run at. Remember that your CPU speed is (FSB/4) * Multiplier. So with a multiplier of say, 10, you are talking about a CPU difference of 2ghz ((800/4 * 10) = 200 * 10 = 2ghz). With a 1066 bus you are looking at 2.66ghz ((1066/4)*10=266*10=2.66ghz).

Corasir > GSkill: THis one is my opinion, but I am sure many will agree. If you were talking OCZ, Mushkin, Geil, or Crucial the difference might be arguable.

finally, if the 4gb is 4x1gb then it will probably cause issues with the DDR part of it. It is a known fact that motherboards that support DDR run better with only 2 sticks, especially if you plan on overclocking.

There is My Two Cents, take it for what it's worth.

That actually helped me a lot.

CPU is AMD Athlon x2 6000+

Any idea on that?

Or dpoes the above comment definately apply.

On a AMD anything over 667 is overkill.... Even on my machine, i have 800 in it, if i run the RAM at 800 the system becomes unstable. But when i lower the ram to 667 i can go all the way to 290fsb before i need to add any voltage. I know that it has been beat to death, but look for some ddr2 with tight timmings vs high bandwidth. if you can get something at CAS3 then you are cooking.

even when i installed 1066 crap in here it would become unstable. i even maxed out the other voltages besides CPU and RAM. ram is at 2.2 and the CPU changes depending on what i am doing.