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Corsair RAM having trouble with XMP

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May 18, 2012 2:48:16 PM

Hey guys! I did a new build for my cousin just on sunday, here is the build:

Mobo: Asus P8H77-V
CPU: Intel Core i5 2500
RAM: Corsair CMZ8GX3M2A1600C9
HDD: Seagate Barracuda 3TB
GPU: Asus GTX 550Ti
PSU: Corsair 600CX V2
Case: Corsair 300R

The issue that I'm having is that the BIOS, when set to auto, sets the RAM to 1333 instead of 1600. Changing the settings from auto to XMP does show that the RAM should run at 1600, but when i save the settings and attempt to reboot, it won't, it'll just give me a black screen. I tried it many times and i always get the same result. I've updated the BIOS to the most current version and nothing changed. I only put the modules in one at a time and got the same thing.

I then tried putting the RAM in my buddy's build to see if it would work there, he is using an Asus P8P67 LE with a Core i5 2310. I changed the settings to XMP and it was able to reboot successfully.

I am really confused with this one... Any and all help is much appreciated!
May 18, 2012 3:03:08 PM

Have you tried putting them in other pair of DIMM slots?
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May 18, 2012 3:05:00 PM

Yup I tried that aswell, got the same result
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August 23, 2012 10:58:05 AM

I haven't completed my build yet but I have the exact same mobo and memory as you. Checking the manual of the mobo it does not list our memory in the QVL. guess that is why it won't work at 1600.
Does it work fine at 1333?
first time build so i am a complete noob. xD
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August 23, 2012 4:50:43 PM

Sadly I later realized I had made a mix up with the memory...

CMP8GX3M2A1600C9 is supported @ 1600, not CMZ8GX3M2A1600C9. Only difference being the P and Z...

But to answer your question, the build has been running with the same memory @1333 for a few months now without any issues what so ever.
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a c 207 Ĉ ASUS
a c 717 V Motherboard
August 23, 2012 5:20:56 PM

krab19 said:
Mobo: Asus P8H77-V
CPU: Intel Core i5 2500

DDR3-1600 isn't supported with the Sandy Bridge CPU, so DDR3-1333 is it. Only the Ivy Bridge on the H77 supports DDR3-1600 and higher. Otherwise you'd need a P67/Z68/Z75/Z77 Chipset for DDR3-1600 support.
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Best solution

a c 207 Ĉ ASUS
a c 717 V Motherboard
August 23, 2012 5:29:25 PM

So there's no doubt, here's your specs; ref - http://www.asus.com/Motherboards/Intel_Socket_1155/P8H7...
Quote:
"4 x DIMM, Max. 32GB, DDR3 2200(O.C.)/2133(O.C.)/2000(O.C.)/1866(O.C.)/1800(O.C.)/1600/1333 MHz Non-ECC, Un-buffered Memory
Dual Channel Memory Architecture
Supports Intel® Extreme Memory Profile (XMP)
* 1600MHz and higher frequency is supported by Intel® 3rd generation processors.


Intel® 3rd generation processors = Ivy Bridge
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August 23, 2012 7:12:13 PM

Best answer selected by krab19.
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August 23, 2012 7:13:12 PM

Thank you for this! Haha, now it all makes sense! I knew i should have gotten a mobo with the Z77 chipset :p 
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August 26, 2012 8:09:51 PM

nice then i get the full 1600 as i have an ivybridge one thanks for clarifying.
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