Overclock.net › Forums › Graphics Cards › NVIDIA › CPU overclock causes GPU issues
New Posts  All Forums:Forum Nav:

CPU overclock causes GPU issues

post #1 of 14
Thread Starter 
I have been running with 2 x GTX 570s and 1 x GTX 275 GPUs in my rig.

Last week I replaced the GTX 275 with another (identical) GTX 570 but soon noticed applications quitting and general instability.

I now have my CPU & MB running at stock speeds and voltages so no overclocking, all my GPUs are still overclock at;

Core Clock (MHz): 760
Shader Clock (MHz): 1520
Memory Clock (MHz): 1900

And everything seems to be stable now!!

Any ideas?

Note: I know this could be either a AMD or Nvidia thread, but cuz changing the GPU is the only change thought it best posted in here.
post #2 of 14
maybe the 3rd gtx 570 increased heat of the other 2 570's and makes the gpu unstable at high temperatures
    
CPUMotherboardGraphicsGraphics
Intel i7 3770k Asus Maximus V Formula GTX titan GTX Titan 
RAMHard DriveHard DriveCooling
12gb Corsair Vengeance Vertex 4 Vertex 4 Thermaltake Water2.0 Pro 
OSMonitorMonitorMonitor
Windows 7 Proffesional Planar SA2311W Planar SA2311W Planar SA2311W 
KeyboardPowerCaseMouse
Das Professional Silent Corsair AX1200 HAF-X Logitech G9x 
Mouse Pad
Razer Mousepad 
  hide details  
Reply
    
CPUMotherboardGraphicsGraphics
Intel i7 3770k Asus Maximus V Formula GTX titan GTX Titan 
RAMHard DriveHard DriveCooling
12gb Corsair Vengeance Vertex 4 Vertex 4 Thermaltake Water2.0 Pro 
OSMonitorMonitorMonitor
Windows 7 Proffesional Planar SA2311W Planar SA2311W Planar SA2311W 
KeyboardPowerCaseMouse
Das Professional Silent Corsair AX1200 HAF-X Logitech G9x 
Mouse Pad
Razer Mousepad 
  hide details  
Reply
post #3 of 14
Thread Starter 
I've was monitoring the GPUb temps but no change from previous temperatures. Hence me running all my GPUs overclocked now with no issues.

I only get problems when I OC my CPU and change MB voltages.
post #4 of 14
Could be that the extra bandwide to the CPU started make the CPU unstable. Sometime extra volts to the PCIE lanes and chip helps.

How did you OC your CPU? Did you change anything in the SB / PCIE frequencies? (I'm not a good AMD OCer ).

On intel, increasing ICH volts sometimes help to make it stable (up to a point).
Main system
(16 items)
 
Editing PC
(8 items)
 
 
CPUGraphicsGraphicsRAM
E5-1680v2 AMD FirePro D700 AMD FirePro D700 64GB 1866mhz 
Hard DriveOSMonitorCase
1TB PCIE SSD OSX 10.10.x Dell U2713H Mac Pro 
  hide details  
Reply
Main system
(16 items)
 
Editing PC
(8 items)
 
 
CPUGraphicsGraphicsRAM
E5-1680v2 AMD FirePro D700 AMD FirePro D700 64GB 1866mhz 
Hard DriveOSMonitorCase
1TB PCIE SSD OSX 10.10.x Dell U2713H Mac Pro 
  hide details  
Reply
post #5 of 14
Thread Starter 
Hi,

I did nothing to change the PCIE.

I was at;

CPU = x16.0
FSB = 250MHz
CPU = 1.4v
CPU/NB = 1.4v
NB Freq = 3000MHz
HT Link Speed = 2000MHz

The following is still unchanged;

NB = 1.1v
SB = 1.113v
HT = 1.2v

for many weeks with no problems. Until I swapped the GTX 275 with the GTX 570.
post #6 of 14
I don't know much about your PSU and assuming it has more than a single 12V rail, is it possible that the new GPU and the 8 pin CPU connector arfe running off the same 12V rail?
 
HTPC
(8 items)
 
 
CPUMotherboardGraphicsRAM
i7-3930k MSI X79MA-GD45 Powercolor 7950 G Skill 
Hard DriveCoolingCoolingCooling
Samsung 830 Swiftech Apogee XT Rev. 1 EK-FC HWLabs Black Ice GTX 240 and a Koolance HX-CU72... 
CoolingCoolingOSOS
MCP 35X and a MCP 350 Koolance 401x2 Opensuse 12.1 Windows 7 
KeyboardPowerCase
Ducky OCN with cherry blues Antec True Power New 650W Cooler Master CM690 II 
CPUMotherboardGraphicsRAM
i5-750 Gigabyte p55-ud2 GTX 430 G Skill 
Hard DriveOSPowerCase
Samsung HD204UI Fedora 15 Corsair CX-430 Silverstone GC04 
  hide details  
Reply
 
HTPC
(8 items)
 
 
CPUMotherboardGraphicsRAM
i7-3930k MSI X79MA-GD45 Powercolor 7950 G Skill 
Hard DriveCoolingCoolingCooling
Samsung 830 Swiftech Apogee XT Rev. 1 EK-FC HWLabs Black Ice GTX 240 and a Koolance HX-CU72... 
CoolingCoolingOSOS
MCP 35X and a MCP 350 Koolance 401x2 Opensuse 12.1 Windows 7 
KeyboardPowerCase
Ducky OCN with cherry blues Antec True Power New 650W Cooler Master CM690 II 
CPUMotherboardGraphicsRAM
i5-750 Gigabyte p55-ud2 GTX 430 G Skill 
Hard DriveOSPowerCase
Samsung HD204UI Fedora 15 Corsair CX-430 Silverstone GC04 
  hide details  
Reply
post #7 of 14
Thread Starter 
Thanks, I will look into that. But I would have thought I would have seen this problem before as I had three GPU cards installed.
post #8 of 14
Thread Starter 
The power supply I have is;

http://www.gigabyte.com/products/pro...px?pid=2705#kf

It states;

Quad +12V Rails, 4-rail, +12V design, capable of supplying higher power output.
NVIDIA certified multiple graphic accelerators support up to 4 graphic cards.

I will look at the cabling when I have time (at work right now).
post #9 of 14
The 1200w is more than enough for 3x570s.

I think you should increase the SB volts. Its the same with the IOH on intel.
The more GPUs you have, the more stress you are putting on the SB. If it doesn't have enough volts, it will also start stressing the CPU.

I had something similar in the past, that when OCing the cards, the computer starts to BSOD on CPU errors.
Main system
(16 items)
 
Editing PC
(8 items)
 
 
CPUGraphicsGraphicsRAM
E5-1680v2 AMD FirePro D700 AMD FirePro D700 64GB 1866mhz 
Hard DriveOSMonitorCase
1TB PCIE SSD OSX 10.10.x Dell U2713H Mac Pro 
  hide details  
Reply
Main system
(16 items)
 
Editing PC
(8 items)
 
 
CPUGraphicsGraphicsRAM
E5-1680v2 AMD FirePro D700 AMD FirePro D700 64GB 1866mhz 
Hard DriveOSMonitorCase
1TB PCIE SSD OSX 10.10.x Dell U2713H Mac Pro 
  hide details  
Reply
post #10 of 14
Thread Starter 
Well it seems to be stable now, I'm slowly increasing the level of OC.

The manual from Gigabyte is awful, it gives no details. But it seems ThermalTake use the same OEM 'CWT 1200W'. They have a better explanation on how to correctly connect multiple GPUs.

It seems the GPU power connectors are split across a number of +12V power rails and you must NOT have a GPU card using different power rails. Since the GTX 570 requires two power connectors and there are six to connect I had a high chance of mixing GPUs across the power rails.

So I downloaded the ThermalTake manual and I think I have it sorted not.

Shame about the Gigabyte user guide, a few reviews suggests the Gigabyte uses higher quality components than the ThermalTake unit.

Anyway it will be a very slow recovery back to 4GH for me.

Thanks for all the suggestions.
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: NVIDIA
Overclock.net › Forums › Graphics Cards › NVIDIA › CPU overclock causes GPU issues