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Can I mix DDR3 1600mhz Dual Channel Kits?

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September 10, 2010 12:59:28 AM

I have a G.skill DDR3 2x2GB @ 9-9-9-24 1.5V kit and a Patriot Gamer DDR3 2x2GB @ 7-7-7-24 1.7V and I think I realized a bit too late that I will not be able to get these both to run at 1600mhz? I think by default they are being clocked down to 1333MHz I have no idea how to begin to set timings manually for these to work together @ 1600mhz? Is it even possible? Will it suffer much performance as long as my AMD 955 Phenom Black is recognizing the 8GB of RAM? Can you set timings differently for the first 2 RAM slots as opposed to the next 2? They appear to run off the same settings in the BIOS as far as I can tell.

Thanks
a c 347 } Memory
September 10, 2010 1:06:38 AM

The DDR will run at the slowest CAS and Speed, but mixing 1.5V & 1.7V is not a good idea. I don't know if it will run stable. What exact P/N are the DDR's?
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September 10, 2010 1:58:08 AM

jaquith said:
The DDR will run at the slowest CAS and Speed, but mixing 1.5V & 1.7V is not a good idea. I don't know if it will run stable. What exact P/N are the DDR's?


I am not sure exactly but the only way I can get the computer to boot and show 8GB of RAM is to set it @ 533MHz memory clock and CAS Latency 8 anything else the computer doesn't boot seems to work fine like this so far. I have the AMD Overdrive utility and cant figure out what might make these both work at 800 clock (1600MHz)
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September 10, 2010 1:58:44 AM

Thinking I should just keep this simple and buy another pair of the same exact G.Skill RAM
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September 10, 2010 2:05:46 AM

Appears that its running @ 1.6V as well is this bad for my 1.5V RAM? Crosshair III mobo
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a c 347 } Memory
September 10, 2010 2:40:10 AM

jdbaker82 said:
Thinking I should just keep this simple and buy another pair of the same exact G.Skill RAM


Yep, while you "can" mix and match it is not a good idea to have different Speeds + different CAS timings + different Voltages + different manufacturers, etc - you see where I'm going with this...your stock with the WORST of each not the better of each.

You're making the best decision getting the same.

Good Luck!
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