Q6600 - no joy overclocking

[Dia01]

Maybe some one could provide advice on overclocking with a Q6600 which I have just bought. I can not raise the FSB past 1244MHZ (2.8GHZ) without recieving the BSOD? The higher the FSB is raised the quicker I recieve the BSOD.

System:
Q6600 G0 SLACR
BFG 680i latest P31 Bios
2 X 1GB OCZ PC2-8500 SLI RAM
2 X BFG 8800GT OC
1000W E-Power Modular PSU
Running Vista Premium 32 Bit

I belive I have tried everything - disabling SLI memory, unlinking the FSB memory clock mode, disabling all the limiting features as per the (Nvidia nForce 680i SLI overclocking guide), lowering the multiplier and raising the FSB, even lowering the RAM FSb below stock. I have raised the voltages also asw per the guide but still to no avail.

Cooling is not the problem as the CPU, GPU's, MCP and SPP are water cooled. I have studied a shit load of related forums but still can't seem to have any success. My old E6600 originally was able to overclock without stability issues but also found after awhile I wasn't getting the results I used to. Could this possibly be a software issue with vista? Any help will be much appreciated!

 

[PaulieG]

Well, you probably want to review the stickies in this section. Also, I saw no mention of voltage increases. You may also need to adjust your memory speeds down, as you overclock your memory when you overclock the cpu.

 

[Fitseries3]

drop your ram to sync mode. raise the vcore, fsb voltage, and spp voltage.

after running the hell out of my q6600 for 6 months, i can do 3.6ghz with stock voltages now.

 

[Dia01]

Well, you probably want to review the stickies in this section. Also, I saw no mention of voltage increases. You may also need to adjust your memory speeds down, as you overclock your memory when you overclock the cpu.

I actually did try to lower my RAM speeds without any success. I also raised my CPU core voltage to 1.45V, CPU FSB to 1.5V and SPP and 1.5V. The memory should't overclock when unlinked and I missing something?

 

[Fitseries3]

I actually did try to lower my RAM speeds without any success. I also raised my CPU core voltage to 1.45V, CPU FSB to 1.5V and SPP and 1.5V. The memory should't overclock when unlinked and I missing something?

dont run unlinked. that's the problem. linked and synced is best until you find your max.

 

[pepsi71ocean]

What is your stepping revision do you ave B3 or G0? If its G0, then upp your voltage slightly to 1.2 Volts, and run 300x9

Link and sync your ram to your fsb, if you want a perfect 800 you can do 1600FSB, 400x8

or if it rememebr 1200fsb, with a 5:4 divider will get you to 800 FSB.

 

[grunt_408]

I cannot go higher with my setup. 3.20GHz 400 8x FSB which makes my ram do 800MHz.
That is on stock volts. You should be able to achieve a good O/C out of the setup you have.

 

[Fitseries3]

I cannot go higher with my setup. 3.20GHz 8x400 FSB which makes my ram do 800MHz.
That is on stock volts. You should be able to achieve a good O/C out of the setup you have.

that's a 6750 for ya.

 

[Dia01]

G0 Stepping. I am currently trying SYNC mode with SLI Memory in EXPERT mode.

 

[grunt_408]

that's a 6750 for ya.

I do believe that it is my ram holding my rig back not my cpu

 

[Fitseries3]

G0 Stepping. I am currently trying SYNC mode with SLI Memory in EXPERT mode.

the EPP(sli memory) can cause the ram to run in a 1t situation and be VERY unstable. you may have to disable EPP and manually set your timings to 5-5-5-15-2t to get where you want to be.

YOU HAVE ALMOST THE SAME SETUP AS ME.

 

[Fitseries3]

I do believe that it is my ram holding my rig back not my cpu

yeah, the 667's may be holding you back. you should be able to get the e6750 to 3.6 on your board easy.

 

[Dia01]

the EPP(sli memory) can cause the ram to run in a 1t situation and be VERY unstable. you may have to disable EPP and manually set your timings to 5-5-5-15-2t to get where you want to be.

YOU HAVE ALMOST THE SAME SETUP AS ME.

The SLI RAM I have has always been a pain in the ass. I will try the timings as you suggested.

 

[pepsi71ocean]

G0 Stepping. I am currently trying SYNC mode with SLI Memory in EXPERT mode.

disable sli memory,

whaqt is your ram timing's and at what voltage

 

[grunt_408]

yeah, the 667's may be holding you back. you should be able to get the e6750 to 3.6 on your board easy.

I am going to try for 4 GHz when I get some better ram I figure I might be lucky

 

[Fitseries3]

The SLI RAM I have has always been a pain in the ass. I will try the timings as you suggested.

i'll buy them from you. i've been trying to pick up another set for less than $100.
they aren't that bad, you just have to coax them in the right direction.

 

[Fitseries3]

I am going to try for 4 GHz when I get some better ram I figure I might be lucky

on water, yes, very possible on a p35 board. get a good set of 800mhz or 1066mhz with micron d9gmh's

here....

http://ramlist.ath.cx/ddr2/

 

[grunt_408]

on water, yes, very possible on a p35 board. get a good set of 800mhz or 1066mhz with micron d9gmh's

here....

http://ramlist.ath.cx/ddr2/

My IFX-14 might just allow it
Sorry Dia01 for hijacking your thread there for a tick

 

[xu^]

very strange u cant get past 2.8ghz

im running a G0 on stock voltage @3.06ghz FSB 334x9 with nps at all
did have to change the mem timngs to get it to boot tho.

 

[pepsi71ocean]

my q6600 i running at 3.2Ghz (9x356), with a hight vcore of 1.3 volts, my ram timing is 4-4-4-15 2t, at 2.15 Volts.

When u tried to go over 2.8 Ghz did you upp the voltage, to asure agains the vdroop

 

[Fitseries3]

pencil mod to fix vdroop and you won't have any problems like this.

 

[Dia01]

my q6600 i running at 3.2Ghz (9x356), with a hight vcore of 1.3 volts, my ram timing is 4-4-4-15 2t, at 2.15 Volts.

When u tried to go over 2.8 Ghz did you upp the voltage, to asure agains the vdroop

I'm currently trying the following:

SLI Memory - Disabled
FSB Mem Clock Mode - Linked
FSB Mem Ratio - Syn Mode
FSB (QDR) 1334MHZ Multiplier X9 (3.0GHZ)
Actual Mem (DDR) - 667
Mem Timing - 5,5,5,15,2T

CPU Core - 1.35V
CPU FSB - 1.4V
Mem - 1.85V
SPP - 1.4V
MCP - 1.5V
HT nForce <-> MCP - 1.20V

I'll see how it goes for a ahwile and also run Orthos.

 

[CrAsHnBuRnXp]

The 680i boards usually dont go past 3GHz with quad cores unfortunately. Thats one reason I just bought an x38 chipset. That and Yorkfield support and PCIe 2.0.

I run linked and syncd. FSB is 1337 of all numbers. 3Ghz Prime64 stable. (I use a 64-bit OS)

 

[Fitseries3]

The 680i boards usually dont go past 3GHz with quad cores unfortunately. Thats one reason I just bought an x38 chipset. That and Yorkfield support and PCIe 2.0.

I run linked and syncd. FSB is 1337 of all numbers. 3Ghz Prime64 stable. (I use a 64-bit OS)

only the older 680i's have that problem. the newer ones such as my 2 evga A1 boards have no problem with quads. my q6600 runs great.... pics are proof...

 

[pepsi71ocean]

The 680i boards usually dont go past 3GHz with quad cores unfortunately. Thats one reason I just bought an x38 chipset. That and Yorkfield support and PCIe 2.0.

I run linked and syncd. FSB is 1337 of all numbers. 3Ghz Prime64 stable. (I use a 64-bit OS)

My 680i has no problems running 3.2 GHz, its jus thr chips run a little warm from my taste. Im waiting on some aftermarket stuf to fix the cooling issue.

try 1400 Link and synked with a 9 x multi. tighten up ur ram timings, and doe sit not boot into windows at all?
My other though is you hit a FSB hole. I ran into a FSB hole between 3.2-and 3.4 GHz