Tom's Hardware > Forum > Motherboards & Memory > Memory > [Solved] G.Skill 6400CL5D-4GBPQ OC ?

[Solved] G.Skill 6400CL5D-4GBPQ OC ?

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Best answer from mongox.

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bhumpty   09-24-2009 at 04:00:37 AM

I have 4GB OCed right now to 942 running smooth....
I am getting Win7 64 and wanted to go up to 8GB.
Anyone know if I will be able to run all 8 gigs at these speeds???
And is it possible to run some g.skill 1066 with these?
I really don't want to buy 8 gigs of 1066...


Message edited by bhumpty on 09-24-2009 at 04:01:19 AM
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Best answer from mongox
I'd stick with the exact same RAM if I were you.

Notice that the 1000 is listed at 2.0-2.1V. If this is what you have now:
http://www.newegg.com/Product/Prod [...] -_-Product
then it's a 1.8-1.9V module.

Does your BIOS allow you to direct different voltage to the RAM modules? I see lots of problems with the higher voltage RAM anyway - I wouldn't touch it. Are you sending your current RAM more than 1.9V? If so, would it be able to run under the even more overvoltage you need for the new ones?

And remember, that 1000 would only be 800 as long as the others are present, no way around that I know of.

If you can buy the exact same modules that you like now - I'd do it.
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Silver Motherboards badge mongox   09-24-2009 at 06:52:19 AM

I see no reason you couldn't run 4 sticks at the same OC as 2 sticks, but I'm no expert in this. There could be heat concerns for example. And even 2 more sticks bought at the same time might not have the same OC characteristics when swapped with your current ones.

It's possible to run 1066 with those, but all will run at 800 speed. So might as well match them exactly.

Depending on your motherboard, which you didn't mention or give URL to its homepage, you may:
1)not be able to run 1066 with 4 sticks (AMD AM sockets)
2)not be able to set timings individually - again, good reason to match current if overclocking

Check your motherboard manual for these things.

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bhumpty   09-24-2009 at 01:22:27 PM

Thanks for the reply. My system specs are on my profile (it would be nice to have a sig...).
So if I run 1066 and 800 I could run them at whatever speed the 800 is capable of (942)?
G.Skill 1000 PQ

Gigabyte EP45-UD3P
Q9550E0 @4.0 @1.21V
2x2 GSkill PQ 800@942
GTX 260 750/1522/1200
Xigmatek Dark Knight
Corsair TX 650W
Antec 300


Message edited by bhumpty on 09-24-2009 at 01:24:39 PM
Reply to bhumpty
Silver Motherboards badge mongox   09-24-2009 at 01:52:04 PM
Best answer

I'd stick with the exact same RAM if I were you.

Notice that the 1000 is listed at 2.0-2.1V. If this is what you have now:
http://www.newegg.com/Product/Prod [...] -_-Product
then it's a 1.8-1.9V module.

Does your BIOS allow you to direct different voltage to the RAM modules? I see lots of problems with the higher voltage RAM anyway - I wouldn't touch it. Are you sending your current RAM more than 1.9V? If so, would it be able to run under the even more overvoltage you need for the new ones?

And remember, that 1000 would only be 800 as long as the others are present, no way around that I know of.

If you can buy the exact same modules that you like now - I'd do it.

Reply to mongox
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