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memory for MSI X68A-GD80 1333 or 1600?

post #1 of 7
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I'm a newbie here and I've never overclocked before, but I'm building my own PC for the first time and I'll be overclocking for the first time. The main sticking point I have is what memory to get. I'm planning on getting the MSI X68A-GD80 motherboard and the i7-2600k. The motherboard memory support says that it supports PC-1333, while PC-1600 and PC-2150 are supported with overclocking.

I'm confused by what this means on a practical level. Does that mean if I overclock the CPU then I can use 1600mhz memory?

And will there be a noticable performance boost would be for PC-1600 vs PC-1333 if the stock timings are the same (9-9-9-24 on the corsair memory I'm looking at for both speeds). Assume that I'll overclock the CPU to somewhere in the 4.2 to 4.5 ghz range. I won't be going for the highest setting, just a useful bump that is doable with air cooling.

I would think that if the slot is a 1333 slot, then faster memory will do nothing for performance. Why am I wrong about this?

Thanks!

Mark
post #2 of 7
The IMC of the CPU only officially supports 1333, but can easilly run 1600.

With Sandy bridge, all you need to do is change the multiplier to change RAM speed.

Pretty much any ram will work.

There is probably no noticeable difference between 1333 and 1600 assuming similar timings
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post #3 of 7
Quote:
Originally Posted by reflex99 View Post
The IMC of the CPU only officially supports 1333, but can easilly run 1600.

With Sandy bridge, all you need to do is change the multiplier to change RAM speed.

Pretty much any ram will work.

There is probably no noticeable difference between 1333 and 1600 assuming similar timings
Multiplier is independent from the RAM speed. You choose from 1333, 1600, 1866, 2166 unless you touched the BLCK.
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post #4 of 7
How is the multiplier independant from ram speed?

multiplier x blk= ram speed

I'll agree the ram multi is a bit different, as it only gives you 1066/1333/1600/1866/2133/etc, but the concept is the same
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post #5 of 7
Quote:
Originally Posted by reflex99 View Post
How is the multiplier independant from ram speed?

multiplier x blk= ram speed

I'll agree the ram multi is a bit different, as it only gives you 1066/1333/1600/1866/2133/etc, but the concept is the same
I meant the CPU turbo multiplier is independent from the RAM speed.

The ram multiplier has everything to do with the RAM speed .
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post #6 of 7
well yea........

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post #7 of 7
Here you go. Quoted from my own thread...

Quote:
Originally Posted by turrican9 View Post
Here is an an even better, later and more detailed test - The Best Memory for Sandy Bridge

It actually seems 1333-7-7-7-24 are very equal to 1600-9-9-9-24, with a little performance edge for 1600MHz CAS 9 one..


    
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