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GA-P31-DS3L FSB won't change

post #1 of 4
Thread Starter 
Hey, I own a GA-P31-DS3L and a E8400. Having looked over the net they both seem to have good OC performance, especially the CPU. So I set out to bump it to 4GHz on air with the AC7 Alpine cooler. The problem is for some reason the FSB setting won't get properly saved or used. When I change it save and exit, the pc starts with the default fsb. The strange thing is that overvoltages and multipliers are saved just fine, everything except changing the FSB is working. I tried overvolting the FSB, the CPU, the ram, even used some looser timings but it would still revert to the default 333MHz after the "Save and Exit". Also when I do that the screen goes black like a failed shutdown and i have to reset or turn it off manually. I've tried reseting the cmos, the battery is fresh, i got the latest bios. A friend even suggested upping the PCIe bus because as he said it the PCIe clock may be linked to the fsb. Here are some pics.
post #2 of 4
Disable CIE/Speedstep etc. etc.?
    
CPUMotherboardGraphicsRAM
Xeon w3680 Gigabyte X58A-UD3R GTX 295 Engineering Samples 2X Corsair XMS3 
Hard DriveHard DriveCoolingOS
Sandisk SSD Seagate Corsair H50 W7 Ult 
MonitorMonitorKeyboardCase
Viewsonic VA1912wb Viewsonic VA912b K350 CM HAF 
Mouse
Logitech M570 
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CPUMotherboardGraphicsRAM
Xeon w3680 Gigabyte X58A-UD3R GTX 295 Engineering Samples 2X Corsair XMS3 
Hard DriveHard DriveCoolingOS
Sandisk SSD Seagate Corsair H50 W7 Ult 
MonitorMonitorKeyboardCase
Viewsonic VA1912wb Viewsonic VA912b K350 CM HAF 
Mouse
Logitech M570 
  hide details  
Reply
post #3 of 4
Thread Starter 
I have disabled all of that too
post #4 of 4
Thread Starter 
Well seems removing the battery and reseting the bios did the trick. I managed to get 3.6GHz with a x9 multi and 400MHz bus speed with a Vcore of 1.26V slightly above the stock 1.25V. It won't get trough the POST with 4GHz and a 445MHz bus speed, so do i need to overvolt the FSB, the (G)MCH (i assume this is the northbridge) or the CPU?
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