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February 16, 2012 8:09:39 PM

Does anyone have a Rampage III Formula motherboard with Corsair XMS3 2000 MHz memory? I need help overclocking the memory, it runs at 533 MHz no matter what the bus speed is set at. I tried to enable XMP and it wouldn't boot up. Computer recognizes all 24 GB of ram.

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a b K Overclocking
February 17, 2012 3:42:59 AM

so your running at 1066 stock? If I'm not mistaken isn't there an option to manually adjust your RAM frequency through your BIOS options? Have you tried adjusting your RAM Voltage?
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February 17, 2012 9:47:47 PM

I was able to get it to run at 1680 last night, had to kick the cpu up to 4.4 ghz to get it to do that. I have tried choosing one of the clock speeds and it won't boot up, also tried XMP and it won't boot. Ram voltage is about 1.65 to 1.656, where it should be according to Corsair. Tried all of the latency settings within reason, even the one Corsair recommended, actually they recommend two different ones. I know many have run this combo and ran at 2000 mhz, I just don't know how they did it. Ram checks good. Even ran Prime 95 torture test for a couple of hours last night.
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a b K Overclocking
February 18, 2012 2:42:25 AM

1680 is still pretty fast RAM, there really isn't much difference between 1680 and 2000, maybe a little but not a great deal. You may bump up the RAM to 1.85v but I wouldn't push it any higher. Is 1.65v stock or have you bumped it from 1.5v originally?
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February 19, 2012 12:52:46 AM

rage33 said:
1680 is still pretty fast RAM, there really isn't much difference between 1680 and 2000, maybe a little but not a great deal. You may bump up the RAM to 1.85v but I wouldn't push it any higher. Is 1.65v stock or have you bumped it from 1.5v originally?


I think it was 1.5 stock, I am at 1.8 on DRAM Bus right now. What are the highest voltages you would go on these, it's an I7 960 3.20 GHz, and still be safe? I have a Corsair H100 water cooler, and will be adding a fan to blow a little air around the CPU and RAM.

CPU Voltage

CPU PLL

QPI/DRAM Core

IOH

IOH PCI

ICH

DRAM Bus
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a b K Overclocking
February 19, 2012 2:27:19 AM

1.85v on the RAM is always where I've been most comfortable as a max, some people will go higher but at that point its just academic at those levels. Is you're i7 960 OC'd @3.2GHz or is that the stock frequency? I'm not sure what the recommended max voltage is for your processor but I'd imagine you would want to stay right around the 1.4v max area. Also your RAM doesn't get particularly hot, at least assuming you already have good airflow in your case already, so you may not need to specifically add a fan.
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February 19, 2012 5:10:41 PM

rage33 said:
1.85v on the RAM is always where I've been most comfortable as a max, some people will go higher but at that point its just academic at those levels. Is you're i7 960 OC'd @3.2GHz or is that the stock frequency? I'm not sure what the recommended max voltage is for your processor but I'd imagine you would want to stay right around the 1.4v max area. Also your RAM doesn't get particularly hot, at least assuming you already have good airflow in your case already, so you may not need to specifically add a fan.


Stock is 3.2, it is running at about 4.4 right now, voltage is about 1.425.
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a b K Overclocking
February 20, 2012 3:17:17 AM

I think based on your settings you should be running pretty good now. 4.4GHz is a darn good OC
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