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Problems with RAM

post #1 of 9
9/8/12 at 11:26am
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Hi all,

I am really a newbie in this but my pc now has new RAM and I got advised to do 4x2GB because that is better with my motherboard. Anyway I don't have the feeling that it is running correctly. I've done some research and noticed it shows on CPU-Z that al 4 slots are running on 667Mhz meaning it is on 1333Mhz. I'm talking about 1600Mhz Corsair Vengeance RAM modules, knowing it has to go to 800Mhz I've been looking in my BIOS. But I can't find the proper way to activate it. I've seen that I could set DRAM to 800Mhz but then CPU-Z still showed it was running on 667Mhz. Any help?





Edited by HonorguyXNL - 9/8/12 at 11:31am
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post #2 of 9
9/8/12 at 12:15pm
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Unless I am missing something here, just select DDR3-1600 on your BIOS. That will show up as 800MHz on your CPU-z.
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post #3 of 9
9/8/12 at 12:34pm
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Tried that but I can only select DRAM to 800Mhz. When I reboot and it says 1732-Ungaged mode while booting. CPU-z will still show 667 Mhz
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post #4 of 9
9/8/12 at 12:47pm
1) CPU-Z is correct.
2) Your Corsair Vengeance RAM is rated DDR3-1600 to run at 1600MT/s (Mega Transfers per Second), not 1600MHz (Mega Cycles per Second). At 1600MT/s it is actually running at 800MHz because it is DDR (double data rate).
3) The AM3 platform is only officially supported up to DDR-1333, with anything higher considered an overclock.

To set up your RAM to run at DDR3-1600, there are two options:

1) If your BIOS supports it, use the x8 RAM divider. It might be labeled as 800, or 1600.
2) If your BIOS does not support #1 above, then set RAM to the x6.67 divider. It might be labeled as 667 or 1333. Then raise your HT reference clock to 240, and your memory will be running at DDR3-1600. Adjust other settings as needed for stability now that you have overclocked your entire platform.
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post #5 of 9
9/8/12 at 12:55pm
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You'll never get DDR3-1600 with a 215Mhz bus clock. You need to be at 200Mhz to use x8 multi or 240Mhz to use x6.66.

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post #6 of 9
9/9/12 at 9:06am
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Quote:
Originally Posted by xd_1771 View Post

You'll never get DDR3-1600 with a 215Mhz bus clock. You need to be at 200Mhz to use x8 multi or 240Mhz to use x6.66.

And how do I change that? I've been looking in the BIOS and couldn't find any of the options mentioned above. I can only select on DRAM the manual mode and set it to 800mhz. But on auto it appears to run as high as possible with all the other components. If it doesn't select highest available then something is on its limit already. (Thats what I made out of the details)
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post #7 of 9
9/9/12 at 11:19am
Quote:
Originally Posted by HonorguyXNL View Post

And how do I change that? I've been looking in the BIOS and couldn't find any of the options mentioned above. I can only select on DRAM the manual mode and set it to 800mhz. But on auto it appears to run as high as possible with all the other components. If it doesn't select highest available then something is on its limit already. (Thats what I made out of the details)

This is highly detailed in section 2.4 of your product owner's manual.

I don't see any other way to explain it to you other than how the goat and I already did,

Reference clock * RAM divider = RAM Speed.
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post #8 of 9
9/9/12 at 11:21am
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ok Fail of me then xD. Gotta take my time for this then. Like I said just a newbie with this
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post #9 of 9
9/17/12 at 11:04am
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Just found this again about my Motherboard, http://www.asus.com/Motherboards/AMD_AM3/M4N68T/#specifications Might be helpfull. Haven't had time yet to do this (college)
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