Tom's Hardware > Forum > Motherboards & Memory > General Motherboard > DDR2 1066 or above speed is only supported by 1 dimm per channel

DDR2 1066 or above speed is only supported by 1 dimm per channel

Forum Motherboards & Memory : General Motherboard - DDR2 1066 or above speed is only supported by 1 dimm per channel

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natesi   06-04-2009 at 08:59:35 AM

Howdy,

I have a Phenom II 940 on the way and a Gigabyte board as well. It has the 790X chipset: GIGABYTE GA-MA790X-UD4P AM3/AM2+/AM2


Looking online, the board says "DDR2 1066 or above speed is only supported by 1 dimm per channel."

I ordered 4 GB of RAM (two 2GB sticks). G.SKILL DDR2 1066

So, I'm wondering....

Would I get better performance by putting one stick in each channel, or by putting both sticks in one channel?

Will the Phenom II 940 run the RAM at 1066 native? I won't be overclocking.

Thanks,

-Nathan

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natesi   06-04-2009 at 09:24:37 AM
- 0 +

Hmmm

Just noticed this: http://www.overclockersclub.com/news/24052/

Not sure how credible the source is....

But it sounds to me like 1066 might work in dual channel if you're lucky (or if you apply a little more voltage to the RAM)??

If I'm NOT lucky and have to run DDR 800 though, I still wonder if 4GB @ dual channel DDR 800 is faster than 4GB @ single channel 1066. ???

Message quoted 1 times
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natesi   06-04-2009 at 05:33:55 PM
- 0 +

Hello?

[cricket, cricket]


= )


Did I answer my own question?

Reply to natesi
nss000   06-05-2009 at 07:17:23 AM
- -1 +

So ... hotshot Phenom CPUs can't really run high speed memory. I thinks that's called a "factory cripple". AMD lusrs take it in the butt again. No wonder the INTEL P58 mobos are so expensive. Only the i7s can run 4-sticks ddr3 @ speed.

Reply to nss000
Twoboxer   06-05-2009 at 09:38:07 AM
- 0 +

natesi wrote :

Hmmm

Just noticed this: http://www.overclockersclub.com/news/24052/

Not sure how credible the source is....

But it sounds to me like 1066 might work in dual channel if you're lucky (or if you apply a little more voltage to the RAM)??

If I'm NOT lucky and have to run DDR 800 though, I still wonder if 4GB @ dual channel DDR 800 is faster than 4GB @ single channel 1066. ???



That's what they said in the forums - "more voltage easily solves it". Seems strange that AMD would not only have such a problem, but also not mention it can be solved so easily.

If that doesn't work, go 800. I *doubt* you'll notice the difference.

Reply to Twoboxer
astrotrain1000   06-05-2009 at 10:04:50 AM
- 0 +

"DDR2 1066 or above speed is only supported by 1 dimm per channel." Sounds to me like you can run at 1066 but that you can only do it with 2 sticks. Its Double data rate ram so you have to have 2 sticks in order to run at 1066. I think what it means is that you could not run 4 sticks at 1066. 2 sticks is "1 dimm per channel" 4 sticks is 2 dimms per channel.

Reply to astrotrain1000
Dekasav   06-05-2009 at 06:45:45 PM
- 0 +

Yup, run it dual-channel. That's 1 DIMM per channel, and what you were going to do if you had no info, anyway. If for some strange reason it doesn't work, up the voltage a little.

Reply to Dekasav
natesi   06-05-2009 at 10:22:42 PM
- 0 +

Thanks dudes.

Reply to natesi
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