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New guy, Need help OC'ing qx9650

post #1 of 8
Thread Starter 
Hello everyone, i seem to be in a pickle with the overclocking stuff I am brand new to overclocking and have done a pretty extensive amount of research on the subject in fear of destroying my hardware but even with my research I still can even hold a slight overclock

I am trying to get my cpu to a stable 4.0 ghz that's more than sufficient for what I need

Im not really understanding the voltage/FSB stuff to well..

The most stable i got was 3.1 ghz with a FSB of 1450 and a voltage of like 1.50

The BIOS is strange to me the cpu voltage starts at 0.00000v and goes up, im not sure how to really judge what the voltage will be

and i Guess I don't understand the concept of FSB... When I raise it the clock speed goes up but I keep getting freezez or no boots or blue screens

I don't expect anyone to be able to give me a magic number but i figured u guys may have access to some good resources

My setup is

qx9650 @3.0 ghz ---runs at 70-80f so temps shouldn't be the issue
XFX 750i SLI
8gb 1066 hyperx @800mhz
corsair h60
2xevga gtx 460
1050 watt psu
WIN7 64bit

Thanks for any advice
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CPUMotherboardGraphicsRAM
Intel QX9560 EVGA 780i FTW  (X2 SLI) EVGA GTX 460 8gb HyperX 1066 running @ 800mhz 
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Intel QX9560 EVGA 780i FTW  (X2 SLI) EVGA GTX 460 8gb HyperX 1066 running @ 800mhz 
Hard DriveOptical DriveOSPower
WD Velociraptor 10k rpm 300gb Asus Win 7 Home Premi x64 ULTRA x4 1050 watt 
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post #2 of 8
The voltage at 0.00 is stock Volts then w/e you add from there adds to the stock voltage, so 1.2v stock with 0.3 in the bios is 1.5v.

Might need to check out the VTT voltage and your NB voltage also. If you search for the 750i specifically you should get some more info.

Make sure your ram timings are set manually you may need to loosen them up from advertised to make it stable.

I had that board at one point was not impressed with it's OC ability at all
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post #3 of 8
Thread Starter 
ok cool ill check it out thanks.
My System
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Intel QX9560 EVGA 780i FTW  (X2 SLI) EVGA GTX 460 8gb HyperX 1066 running @ 800mhz 
Hard DriveOptical DriveOSPower
WD Velociraptor 10k rpm 300gb Asus Win 7 Home Premi x64 ULTRA x4 1050 watt 
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel QX9560 EVGA 780i FTW  (X2 SLI) EVGA GTX 460 8gb HyperX 1066 running @ 800mhz 
Hard DriveOptical DriveOSPower
WD Velociraptor 10k rpm 300gb Asus Win 7 Home Premi x64 ULTRA x4 1050 watt 
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ULTRA ALUMINUS 
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post #4 of 8
Stop running 1.5VCore before you kill that chip. VCore has nothing to do with your limitation, and you should not be pushing more than 1.4 VCore or 1.4 VTT if you want that chip to live.

Your problem is going to be your board, not the CPU. You need to tune the board for the fastest FSB it can make, using a lower CPU mutliple (6X) and forgetting about CPU frequency. Then after you get that down you can bring the multi back up and see what you can do stable on the CPU. You should read up on 750i overclocking, you'll need to bump NB voltage etc. and set the RAM correctly.

750i is not a great C2 Quad overclocking board. Duo? Absolutely. Quad? no.
Edited by 2thAche - 10/27/11 at 6:38pm
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post #5 of 8
Thread Starter 
Yes I have read up on the 750i and it seems people are having the same problems as myself.

First off what is a safe increase in voltage for the NB?

RAM: Don't get me started...My ram is capable of running 1066mhz@2.2v 5-5-5-15 STOCK, Default is 5-5-5-18 800mhz and like 1.8 or 9 volts

So..I increased it to 2.2v with 5-5-5-15 ans set the memory mhz to 1066

Boots up and queue the blue screen I try going for broke and OC'ing it to 1200mhz because the board does not support 1066mhz but does support 1200mhz...So I increase voltage to 2.3v 5-5-5-15 @1200mhz, and no boot

reduce to 5-5-5-8 @ 2.2v no boot

Seems no matter what i do I cant even get my ram to run at stock settings let alone my cpu...
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Intel QX9560 EVGA 780i FTW  (X2 SLI) EVGA GTX 460 8gb HyperX 1066 running @ 800mhz 
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WD Velociraptor 10k rpm 300gb Asus Win 7 Home Premi x64 ULTRA x4 1050 watt 
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ULTRA ALUMINUS 
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel QX9560 EVGA 780i FTW  (X2 SLI) EVGA GTX 460 8gb HyperX 1066 running @ 800mhz 
Hard DriveOptical DriveOSPower
WD Velociraptor 10k rpm 300gb Asus Win 7 Home Premi x64 ULTRA x4 1050 watt 
Case
ULTRA ALUMINUS 
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post #6 of 8
Thread Starter 
Tried reducing multiplier to 6 slight increase in voltage and putt fsb to 1400

cpuz read that my 3.0 ghz processor was now working at 2.0ghz and as soon as i opened a game it froze

Ram was at 2.2v 5-5-5-15

added .125 cpu voltage from stock

multiplier x6

FSB 1400

added some NB voltage as well

This thing just wont cooperate
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel QX9560 EVGA 780i FTW  (X2 SLI) EVGA GTX 460 8gb HyperX 1066 running @ 800mhz 
Hard DriveOptical DriveOSPower
WD Velociraptor 10k rpm 300gb Asus Win 7 Home Premi x64 ULTRA x4 1050 watt 
Case
ULTRA ALUMINUS 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel QX9560 EVGA 780i FTW  (X2 SLI) EVGA GTX 460 8gb HyperX 1066 running @ 800mhz 
Hard DriveOptical DriveOSPower
WD Velociraptor 10k rpm 300gb Asus Win 7 Home Premi x64 ULTRA x4 1050 watt 
Case
ULTRA ALUMINUS 
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post #7 of 8
I have an XFX 780i and my q9650 hit 4.0 Ghz without too much trouble.

Try this - x9 multi, 1:1 on the ram, let it autoadjust ram timings, set FSB to 445 or 450, I think I used 1.4v of NB voltage (been a long time since I did this and can't open the bios to check settings), I know i used 1.296vcore.

Here is an Anandtech article about oc'ing your chip.

http://www.anandtech.com/show/2404/11

Make sure your NB has good cooling - they get really hot oc'ed and managing sli
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post #8 of 8
There are a couple of things to note with NVIDIA 600 and 700 (not so much the 790i) series chipsets. NVIDIA tried to allow for many different memory dividers that you don't see in Intel chipsets. Intel allows only a specific few memory dividers that are known stable at all frequencies. NVIDIA, while allowing so many, have created an issue with FSB holes, or frequencies that just won’t work. So the best thing to do is to test target FSB speeds, while leaving the CPU under clocked, to help figure out where the holes are (again, frequencies that just don’t work with certain memory dividers).

What you will see happen is a range of FSB frequencies that the board won't boot. This goes against most OCers method of OCing. As an OCer, you will keep increasing the FSB until it does not boot, and you stop. With NVIDIA, you can actually jump past those frequencies and keep going. So let’s say your board won’t boot at 345 FSB. You can try jumping to 390 FSB and the system boots! You will have just found a FSB hole between 345 and 390 FSB!

OP, you have an unlocked multi on your CPU. So you can leave the FSB on stock (333 FSB) and try OCing just with the CPU. So try finding the max OC for the CPU. Then lower the multi to x6 (the lowest), and try OCing the FSB. Once you find the FSB holes, hump past them to see if you can keep on going. Then once you have the FSB frequencies figured out, and the Max OC of the CPU itself figured out, try to find a nice balance with both to get a robust and stable OC.
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