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CPUZ detects all 12GB, Windows and Bios don't

post #1 of 15
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as title says, cpuz and pc wizard detect the full 12gb or RAM but windows and the bios dont. one of the RAM slots seems not to work either, as in when i take the RAM out of one particular slot it still sas 10GB in windows and on post but if i pull a stick out of another slot it drops down to 8GB. Its not the motherboard as i got a new one, and still the same problem. and its not the RAM as all the sticks have been memtested repeatedly. HALLPPPP
Edited by Sircles - 3/1/11 at 11:19am
     
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post #2 of 15
Quote:
Originally Posted by Sircles View Post
as title says, EVGA support are stumped. cpuz and pc wizard detect the full 12gb or RAM but windows and the bios dont. one of the RAM slots seems not to work either, as in when i take the RAM out of one particular slot it still sas 10GB in windows and on post but if i pull a stick out of another slot it drops down to 8GB. Its not the motherboard as i got a new one, and still the same problem. and its not the RAM as all the sticks have been memtested repeatedly. HALLPPPP
afaik, MemTest tests if the ICs are good, but if something is wrong with the PCB they're on, the ICs don't get tested. It could be that the sticks themselves are reporting their capacity and ID information to CPU-Z via their SPD, but they can't be used at that capacity.

In any case, an RMA might not be a bad idea at this point.
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post #3 of 15
Thread Starter 
in the cpuz report i sent to EVGA it lists info for 6 dimms, which is what is currently in my system though only 10gb is showing instead of 12gb. i ran sticks indvidually in another system and they all passed memtest and i also moved them aroudn within my system and it was always the same slot that didnt work :S i took one out of the slot i suspected broken, and it still said 10gb, confirming my thoughts. i then took one i knew worked out of a slot on the other side of the board and booted the PC, it then showed 8gb, which is correct, i then put the stick i removed from the other side into the slot i thought was broken and it still only showed 8gb, this confirmed that it was the slot and not the DIMM. ive tried all the same procedures with completely different sets of RAM. so not the board, and not the RAM or maybe they all have the same fault????...... could it be cpus? or windows?
     
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post #4 of 15
Sounds like that slot is bad. If no memory will work in it.
I had a similar problem but it was 1 bad stick. If all 6 sticks work separately in the first slot, then it has to be that slot. Just because a MB is new doesn't mean it's perfect.
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post #5 of 15
More than likely there is too much tension on one or both of the CPU sockets. Remove the CPU HSF, raise the CPU lever and loosen all 4 of the hex head screws around the CPU socket. You might have to repeat, removing the HSF and loosening the socket tension a few times before all the RAM slots are recognized.

Contrary to popular opinion, RAM slot issues are seldom defective motherboards but too much tension on CPU socket combined with big, heavy, aftermarket CPU coolers.
Edited by sgilmore62 - 2/27/11 at 4:35pm
    
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post #6 of 15
On my mb, which has 12 gb, if i raise the ram above 1600mhz, itll start showing ram at a less capacity then what is in it, if its at 1800, only 10gb shows, at 2000 only 6 gigs.

I was reading, that with my chip set its only rated to oc at triple channel at 1 stick per channel, if you have more then that, some stick will not show up.

Try lowing the speed below 1600 mhz and just tighten the timing, all 12 should show up...
    
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post #7 of 15
moar vdimm and vtt should fix you right up
post #8 of 15
Thread Starter 
tried with different sets of RAM still the same slot playing up. i have 2 of the mobos and they both have the same problem, chances of that REALLY? what are the thoughts on it being cpu?? somethign to do with memory controller? or windows installation? have tried making the cooler looser and still nothing, though will try it again i guess.
     
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post #9 of 15
Thread Starter 
halp meeee
     
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CPUCPUMotherboardGraphics
Xeon x5650 Xeon X5650 EVGA Classified SR2 EVGA GTX 680 FTW 
GraphicsRAMHard DriveHard Drive
EVGA GTX 680 FTW 24 GB DDR3 1600Mhz C9 1 TB WD Black 1 TB WD Black 
Hard DriveHard DriveHard DriveHard Drive
1 TB WD Black 1 TB WD Black Kington Hyper X 3k 120GB OCZ Vertex 3 120GB 
OSPower
Windows 8 Cooler Master Silent Pro Hybrid 1050w 
CPUMotherboardGraphicsRAM
3930k Intel ES ASrock X79 Extreme4-m GTX 680 16GB 1600Mhz DDR3 
Hard DriveHard DriveOptical DriveCooling
240GB Samsung EVO SSD 2TB WD Green DVDrw Cooler Master Nepton 240m 
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post #10 of 15
Thread Starter 
nothing suggested is working. help plz.
     
CPUCPUMotherboardGraphics
Xeon x5650 Xeon X5650 EVGA Classified SR2 EVGA GTX 680 FTW 
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EVGA GTX 680 FTW 24 GB DDR3 1600Mhz C9 1 TB WD Black 1 TB WD Black 
Hard DriveHard DriveHard DriveHard Drive
1 TB WD Black 1 TB WD Black Kington Hyper X 3k 120GB OCZ Vertex 3 120GB 
OSPower
Windows 8 Cooler Master Silent Pro Hybrid 1050w 
CPUMotherboardGraphicsRAM
3930k Intel ES ASrock X79 Extreme4-m GTX 680 16GB 1600Mhz DDR3 
Hard DriveHard DriveOptical DriveCooling
240GB Samsung EVO SSD 2TB WD Green DVDrw Cooler Master Nepton 240m 
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Windows 7 Ultmate Cooler Master VS550 Cooler Master Silencio 352 
  hide details  
Reply
     
CPUCPUMotherboardGraphics
Xeon x5650 Xeon X5650 EVGA Classified SR2 EVGA GTX 680 FTW 
GraphicsRAMHard DriveHard Drive
EVGA GTX 680 FTW 24 GB DDR3 1600Mhz C9 1 TB WD Black 1 TB WD Black 
Hard DriveHard DriveHard DriveHard Drive
1 TB WD Black 1 TB WD Black Kington Hyper X 3k 120GB OCZ Vertex 3 120GB 
OSPower
Windows 8 Cooler Master Silent Pro Hybrid 1050w 
CPUMotherboardGraphicsRAM
3930k Intel ES ASrock X79 Extreme4-m GTX 680 16GB 1600Mhz DDR3 
Hard DriveHard DriveOptical DriveCooling
240GB Samsung EVO SSD 2TB WD Green DVDrw Cooler Master Nepton 240m 
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Windows 7 Ultmate Cooler Master VS550 Cooler Master Silencio 352 
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