Overclocking QX9770 & S2E

sephirex

sephirex

sephirex

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Joined
26 Nov 2008
Posts
5
Hi all, I have the setup in my signature; I have seen it common to overclock a QX9770 to 4.0Ghz. However I can only get it to 3.8Ghz with a 9.5x multiplier and the default 400Mhz FSB (with default voltages). I have tried tweaking the voltages and can load Vista with 4Ghz but it has never been stable (crashes often and cannot run superpi or prime95).

I am wondering if anyone could share their BIOS settings or offer advice as to how to tweak the voltages to attain 4Ghz.

Thanks in advance.
 
Hi,

You are running default voltage settings, can you check to see what the motherboard has set for CPU, Memory, North & South bridges.

My settings using a Q9650 and Super Talent 2000 memory are,

Voltages Set Reported
CPU 1.3 1.32
CPU PLL 1.5 1.52
CPU VTT 1.22 1.24
Memory 1.86 1.9
NB 1.36 1.37
SB 1.5 1.48
All other settings AUTO

Memory
P1 Enabled
P2 Enabled
8
8
8
21
2T
1
29
10
21
AUTO
AUTO
AUTO
AUTO
AUTO

CPU & FSB
Multiplier 9
FSB Linked
FSB Ratio Sync mode
FSB 1778

All spread spectrum options disabled


These have been stable settings on my setup and were used with an E8400 before moving up to the Quad, the only change was the Quad needed less Vcore.

I cannot of course say whether these will work for you but they may be worth a go.

Cheers, Simon.

S2E.jpg
 
Last edited:
SimonB said:
Hi,

You are running default voltage settings, can you check to see what the motherboard has set for CPU, Memory, North & South bridges.

My settings using a Q9650 and Super Talent 2000 memory are,

Voltages Set Reported
CPU 1.3 1.32
CPU PLL 1.5 1.52
CPU VTT 1.22 1.24
Memory 1.86 1.9
NB 1.36 1.37
SB 1.5 1.48
All other settings AUTO

Memory
P1 Enabled
P2 Enabled
8
8
8
21
2T
1
29
10
21
AUTO
AUTO
AUTO
AUTO
AUTO

CPU & FSB
Multiplier 9
FSB Linked
FSB Ratio Sync mode
FSB 1778

All spread spectrum options disabled


These have been stable settings on my setup and were used with an E8400 before moving up to the Quad, the only change was the Quad needed less Vcore.

I cannot of course say whether these will work for you but they may be worth a go.

Cheers, Simon.

S2E.jpg
Click to expand...

This is my current voltage settings when running 1.4Vcore and 1.3VTT as directed by webbo.

87571777rt6.jpg
 
Last edited:
Hi,

I would try two things.

1. As Hefner advised bring your Northbridge voltage up a bit.
2. Raise your Vdimm to around 1.85v in the bios to give an actual 1.9v

I don't know the rated voltage of the Corsair memory but 1.68 seems a bit too low. If your board is like mine the Vdimm fluctuates by about 0.04v so your 1.68 could be in the range of 1.66-1.7.

Cheers, Simon.
 
Last edited:
Hefner said:
Try increasing the north bridge voltage to 1.4v or so, although it may need higher. Watch the temps mind.
Click to expand...

I tried increasing the NB Voltage to 1.5v but to no avail.

SimonB said:
Hi,

I would try two things.

1. As Hefner advised bring your Northbridge voltage up a bit.
2. Raise your Vdimm to around 1.85v in the bios to give an actual 1.9v

I don't know the rated voltage of the Corsair memory but 1.68 seems a bit too low. If your board is like mine the Vdimm fluctuates by about 0.04v so your 1.68 could be in the range of 1.66-1.7.

Cheers, Simon.
Click to expand...

I tried increasing my Vdimm as well, and it still didn't work. Vista will boot fine but Superpimod still crashes when I try to run it.
 
Only thing i can think of is more NB and also check that your memory is in spec. Also, your PLL appears to be a little high. You may want to set it to something like 1.5 (assuming your on auto).
 
Hi,

Another suggestion would be to disable P1 & P2 which will relax your memory timings temporarily. I am assuming that the Super Pi failure is linked to a memory error which is normally the case with mine if I try and push the memory a bit too far.



Cheers, Simon.


Cheers, Simon.
 
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