DDR2 800 vs DDR2 1066

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animan419

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#1 animan419
Member since 2007 • 25 Posts
Is there any performance difference at all between pc6400 and pc8500. My mobo supports both so I was just wondering?
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AARONRULZ1

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#2 AARONRULZ1
Member since 2006 • 6273 Posts
Nominal performance difference at best,you won't notice it.
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TheDukeEmperor

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#3 TheDukeEmperor
Member since 2007 • 202 Posts
You would be better off buying more memory instead of faster memory.
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Macolele

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#4 Macolele
Member since 2006 • 534 Posts
There's probably no big difference. I try setting from 800 to 533. Only a bit performance improve.
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NamelessPlayer

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#5 NamelessPlayer
Member since 2004 • 7729 Posts
Wait, so it's not an issue if your RAM doesn't run at the same speed as the FSB? I always thought that for 1066 MHz FSB CPUs like the Core 2 E6xx0/Q6x00 series, using anything less than DDR2-1066 would result in a major performance hit unless you OC your RAM to that speed.
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skinnypete91

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#6 skinnypete91
Member since 2006 • 6022 Posts

Wait, so it's not an issue if your RAM doesn't run at the same speed as the FSB? I always thought that for 1066 MHz FSB CPUs like the Core 2 E6xx0/Q6x00 series, using anything less than DDR2-1066 would result in a major performance hit unless you OC your RAM to that speed.NamelessPlayer

No..

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skinnypete91

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#7 skinnypete91
Member since 2006 • 6022 Posts

Because Intel CPUs are quad pumped:

1066Mhz FSB = 266 x 4

1333Mhz = 333 x 4

If your RAM is running at 1:1, then it will go no higher than 667Mhz (PC 5400), unless you overclock..