XFX 780i and Q9650

I have the XFX 780i and Q9650 combo. For the past 6 months, I have had a good, stable overclock of 3.6GHZ on stock voltage. I have a Zalman 9700 and was reading 26C idle and 43-47 full load. This was the same temps for 3 different programs. I have been researching and debating OC'ing to 4.0GHZ and bumping up the voltage.

From BIOS, I tuned mt memory and tested it, the I went back into BIOS and Increased my FSB to 1800. This gave me a clock of 4.05GHZ, and upped the voltage to 1.375. FSB was set to 1.4. This is the well known OC BIOS settings for this processor/Mobo combo. I noticed that when I changed the voltages, it would stay at stock (1.3) for both V core and FSB.

I accessed windows XP 64 and opened CPU-Z and noticed I had the 4.05GHZ clock, however the V-core and FSB voltages remained stock. I performed a stress test woth OCCT and it was immediately unstable. the computer froze and I re-booted it.

I restarted the computer with stock CPU settings, however I got a BSOD, then a few more times with no BSOD, but windows froze everytime during startup.

I then when back into BIOS and put the last setting before everything went wrong. Windows opened right up, however CPU-Z only read stock voltages for FSB and Vcore. I tweaked it around and figured the only way to access windows was to put my last overclcok settings. . Anything else freezes.

Things I have done since with no success: reset CMOS jumpers, replaced CMOS battery, and flashed to the latest BIOS for the XFX 780i.

it appears the CPU is at the overclock, but BIOS is not letting me input voltages for V core or FSB. games like flight simulator X etc. are immediately unstable. temps are the same 29c idle and 43 load

here are my specs:


Microsoft Windows XP Professional SP2C 64-bit for System Builders - OEM
Intel Core 2 Quad Q9650 3.0GHz 12MB L2 Cache LGA 775 95W Quad-Core Processor @ 3.6GHZ
XFX nForce 780i SLI Motherboard
(2) EVGA Nvidia GeForce 9800 GTX+ 1GB 256-bit GDDR3 PCI Express 2.0 x16 HDCP Ready SLI Video Cards
CORSAIR CMPSU-750TX 750W ATX12V / EPS12V SLI Ready CrossFire Ready 80 PLUS Certified
ZALMAN CNPS9700 LED 110mm 2 Ball CPU Cooler
Antec Three Hundred Black Steel ATX Mid Tower Computer Case
(3) Scythe DFS123812-3000 "ULTRA KAZE" 120 x 38 mm Case Fan
(2) SILVERSTONE FM121 120mm Case Fan
OCZ SLI-Ready Edition 8GB (4 x 2GB) 240-Pin DDR2 SDRAM DDR2 1000 (PC2 8000) Dual Channel Kit Desktop Memory

any thoughts on what could be the problem?
7 answers Last reply
More about 780i q9650
  1. So are you saying that when it was stable your raised the voltage a little then you got a bsod?
  2. I overclocked the processor speed first, the raised the voltage gradually. When I did this, the actuall voltage indicated the stock voltage evern though i entered in 1.375. stock is 1.3. there is no way to say if it was stable or not becasue i just attempted a stress test once before everything happend
  3. Ok.

    Here is what i believe is the deal.

    The stock settings are set to "auto".

    Wich means you are leaving it up to the mobo to select a voltage for you.

    the voltage that the mobo selects can be up to 1.45v in some cases.

    So you may be actually lowering the voltages when you think you are raising them.
  4. i will set to auto and see what happens, but whenever i change something BIOS has not been saving the changes
  5. Well you have obviously overclocked right?>

    So it is changing saving some things.
  6. i think this need to be rma'd
  7. I have the same setup as you what did you exactly change in the bios to get the 3.6? I have corsair ram ddr2 800?
    Please list? Thanks
Ask a new question

Read More

Motherboards Overclocking