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nForce 790i Ultra memory issue

post #1 of 7
Thread Starter 
I've got an EVGA nForce 790i Ultra motherboard and am having issues with it running memory in certains configs. I think.

I just recently picked up four sticks of 2GB G.Skill Ripjaws 1600MHz RAM to replace my sig rig RAM, but I'm having issues.

First off, I put all 8GB in, set everything in the BIOS, and nothing. It just hung and then after a few dozen seconds reset to a reset everything. However, all 8GB would work if I clocked the RAM down to 1333MHz.

So today I tried 4GB at 1600MHz in slots 0 and 1. 1600MHz gave me like 1562MHz according to CPU-Z and the BIOS, so I just bumped it to 1666MHz without a change in voltage and it was fine.

Then I tried the same config in slots 2 and 3 with the second set of 4GB. Nothing. Same hang. Switched that memory to slots 0 and 1 and it worked at 1666MHz. So I've got confirmation that all 4 sticks run at 1666MHz in slots 0 and 1.

So my question is what the heck is going on? Are some of my DIMM slots busted? They run 1333 fine though. It can't be the memory sticks from what I've seen. Is this just a BIOS thing? Any help would be greatly appreciated.
post #2 of 7
Try upping your NB voltage. It stresses your memory controller more with 4 sticks.
    
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post #3 of 7
Thread Starter 
Thanks for the input. I'll try it and get back to you.

EDIT: No dice. Cranked up the NB (SPP) as far as it would go, 1.55, and nothing. No boot. Tried cranking the SB (MCP) and memory as well, but nothing.

Is this a BIOS issue or a motherboard hardware issue? If it's a BIOS issue then I can leave it until I get some free time in a couple weeks. If not, I'd like to get on the hardware ASAP.
Edited by CasanovaFly - 3/9/11 at 6:33pm
post #4 of 7
Thread Starter 
Bump.

Anybody got any more input on my condundrum?
post #5 of 7
Well I dont knoq what is going on. Mine boots with all 8G (2x4) bit will random bsod mem management error. 4G and no error.

Sent from my SCH-I500 using Tapatalk
post #6 of 7
I guarantee if you put just 4gb in you could run at rated speeds. Now, figure out if it's your NB voltage or DRAM voltage holding you back from running all 8gb at rated specs and get back to us.
 
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ThinkPad W510
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The Arkbird
(14 items)
 
CPUGraphicsRAMHard Drive
i7 3840QM Quadro K2000M 4x8gb Intel 525 Series 240gb mSATA 
Optical DriveCoolingOSMonitor
Tray-load DVD Factory Windows 7 Pro 1080P "Ultrasharp" panel 
KeyboardPowerCase
Integrated Big 'ol brick M4700 chassis 
CPUMotherboardGraphicsRAM
i7 820QM 4318-CTO Quadro FX 880M 4x4gb 
Hard DriveOptical DriveCoolingOS
X-25M G2 DVD Stock Arch x64 
MonitorKeyboardPowerMouse
1080P touch screen IPS Clicky Brick Adapter UltraNav 
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4x Xeon E7440s HP DL580 G3 Motherboard Rev. 1.1 ATi Rage XL Samsung ECC DDR2 
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15K HP Ultra320 SCSI DVD Burner Bare Heatsinks + Chassis Airflow The Ever-Changing Distro... 
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post #7 of 7
Thread Starter 
I'm assuming it's a voltage issue. I haven't sat down to try and identify it yet. I don't think I've tried 4GB at 1600 either. It can't be NB voltage because I've upped that to the max and it didn't work, judging from my previous posts.
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