I7 950 struggles

[russianvr4]

Hey guys i just put my rig together (vid card is from the old comp getting replaced soon) and tried my hand at OCing. but im having some issues.

system

mobo: EVGA X58 SLI3
CPU: I7 950
ram: patriot ddr3 tripple channel 1600mhz 6gb
PSU: Corsair 650w
VGA: 5830
Cooling: thermaltake 850i water cooling kit
HDD: 60gb SSD
OS: Win 7 ultimate


i've been playing with the bios settings and the best i've been able to come up with is 4.5 Ghz with the following settings:

CPU Vcore: 1.45v
Dram: 1.7v
CPU VTT: 1.45v
NB core: 1.36v
x23 multiplier
bclock 195
mem multiplier 2:8
mem timings 9 9 9 24
Vdroop on
HT off
speedstep off
turbo off

before i started playing with ram/cpu frequencies i dropped the cpu multiplier to 12 and ram to 2:6 and ramped up Bclock all the way up to 215 with Vtt voltage at 1.45 and it runs really stable no problem.
so next i dropped Bclock to 160 and set the ram multiplier back up to 2:8.
using memtest86 got it up to 215 bclock at 1.7v no problem

now its time to start playing with the cpu settings.

dropped Bclock down to 160, multiplier to 23 and using intelburntest on maximum setting ran it up to a max of 195@1.45v vcore.
anything past that it either wouldnt load or freeze. i tried adding voltage to the cpu going as far as 1.5v with no luck.

any suggestions?


right now i backed it off to 4.2 GHZ with 21x200@1.29vcore and it runs solid.
it seems like the CPU doesnt like going over past 4.4g much as my memory and chipset was fine with up to 215 bclock but once i start pushing the cpu the system starts freezing up or crashing.
what am i missing?

[zalbard]

Your voltages look quite high, especially VTT.
Memory 2:6 for now.
Make sure you are using "Without VDroop" setting.
Try a lower CPU & IOH PLL voltages, say, 1.35V or 1.5V (hope you can adjust these with your board).
Also, 103-105MHz PCI-E helps.

[zsamz_]

first off your voltages are too high and use the x21 multi

[russianvr4]

i have IOH set at 1.35 as im only using 1 video card.
what does the PCIE freq do?

[russianvr4]

first off your voltages are too high and use the x21 multi

which ones?

[zalbard]

i have IOH set at 1.35 as im only using 1 video card.
what does the PCIE freq do?

In your case, raises the bclk wall. Might also let you use slightly lower voltages overall.

[russianvr4]

you think im hitting a bclk wall?
when i take the cpu/ram out of the equation by dropping the multipliers my bclk goes up to 215 just fine, its just once i start adding the cpu i cant really go above 200 bclk. but i'll try to raise pcie to 104ish

[fordf250]

I am stuck at the same point. 195x23 or 213x21 is the max I can get anything more causes lockup within one minute of linx.

[Andreezy]

I am stuck at the same point. 195x23 or 213x21 is
the max I can get anything more causes lockup within one minute of
linx.

i am also experiencing similar problems to yours, i can run LinX upto 4.48ghz, lil
more juice and i have uneven memory residuals/program locks/crashes or when i
try and tweak i get bsod 01e or c1 or 3b.

are we on the same boat?

[chispy]

im having some issues.

PSU: Corsair 650w = might be the problem

Cooling: thermaltake 850i water cooling kit = This is the Reason why you cannot overclock higher


dropped Bclock down to 160, multiplier to 23 and using intelburntest on maximum setting ran it up to a max of 195@1.45v vcore.
anything past that it either wouldnt load or freeze. i tried adding voltage to the cpu going as far as 1.5v with no luck.

any suggestions?
but once i start pushing the cpu the system starts freezing up or crashing.
what am i missing?

Dude you are trying to pull an OC of 4.5Ghz stable pushing such HIGH voltages on a low end Thermaltake 850i h2o cooling kit ? aint happening , you need better cooling to get further its the truth , and maybe a better and higher PSU. Just keep it at low volts and settle for that 4.2 if is stable for you. Good Luck.

http://www.thermaltakeusa.com/produc...5/cl-w0175.asp

That H2O kit was made for Application :
CPU AMD AM2 series
AMD K8 series
Intel LGA775
Intel P4
as per Thermaltake
NOT for the Hot running 1366 CPUs

[Andreezy]

I am stuck at the same point. 195x23 or 213x21 is the max I can get anything more causes lockup within one minute of linx.

is the i950 really that bad?
this is my 1st stable OC on it...

[[XC] hipno650]

im in a bit of the same boat. I am having a bear of a time getting my 960 to move past 4.2 with HT on in my Sabertooth board. I was able to get it to 4.3 last night with 1.44V on the CPU running at 205x21 and 1.4VTT, it seemed to run WCG all night so that is a good sign, I am planning on go a full custom water setup in the new year and I was really hoping to hit 4.5GHZ HT on stable for 24/7 WCG use? is that really practical? or I am out to lunch? If it's not happening maybe I will just bite the bullet and get a Sandy when they come out as they seem to hit 4.8+ no problem...

i guess my question would be how much a diff would better temps make in OCing this bad boy? or would i still need to pump the volts? Im not to keen on running it 24/7 with 1.5 volts pumping through it...

[Andreezy]

i just thought of something, i also have a 650w psu and major hardware
on it, so the voltage may not be enough to keep a +4Ghz i7 system
stable.
not to mention run ram speeds above 1600mhz.
maybe im wrong, but i kind of started pushing this sytem cause it was
similar to that on OP we hit same bottleneck
i have another system with enermax psu 1020w and it run the system
clean, i have never seeing any of the problems i see here booting on high Bclk and haveing system staying stuck rebooting itself. "scary"