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Plz help overclocking i7 950

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January 18, 2011 9:16:02 AM

Hi ppl need help in overclocking my i7 950 :) 

my config is:
i7 950
Cooler Master N620 Cpu cooler
Asus P6X58D-E
Corsiar dominator 3X2GB DDR3 PC3-12800(1600MHz) CMP6GX3M3A1600C8
Corsiar TX750 psu
WD Green 1TB

i want an decent overclock abt 3.8 with HT enabled, plz help i am new to overclocking n noob in all these
voltage n multiplier tweaking :) 

More about : plz overclocking 950

January 18, 2011 1:49:00 PM

All I did to get my setup to 3.8 (3.9 or 4 with turbo) is to up the BLCK to 160 or so. I didn't have to mess with voltages other then setting my RAM to 1.65. I made sure the "uncore" was within .5 volts of the RAM voltage (1.21 or so) which is also about what the CPU voltage is @ stock.

I'm using a Scythe Mugen R2 in a NZXT Phantom, and my temps will max around 70 degrees under heavy stress with HT on. I don't hit more then 55 during heavy gaming though, so it's okay for me. I'd like lower temps, but I think I'd have to change coolers for that.
January 18, 2011 11:55:10 PM

^+1
with the i7's you most likely won't have to increase voltages for an overclock like that, of course it depends on your motherboard (yours is very good) and the heatsink/fan (also good)
With my "cheap" Asus p6t motherboard I got my i7-930 completely stable at 3.5GHz while undervolting to 1.1375v (in BIOS), load temps with a Coolermaster Hyper 212+ push-pull just barely exceed 60C in Prime95 according to RealTemp (around 58 according to HWMonitor)
HT enabled, i'm pretty sure turbo got it 3.8-3.9 :) 
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March 9, 2011 1:15:07 PM

the problem is tht right now i am getting 45*c on idle and above 75*c in prime95 test without overclocking my chip ? :( 

my stcok temps are too high i guess, if i overclock i'll be hitting obove 85*c in prime95 test.

i think the voltage is the culprit here coz everything in bios is on auto. in turbo mode the temps jumps 15-18*c suddenly from 45 to 60-62*c .
March 9, 2011 1:54:44 PM

Maybe you'll have to manually set the voltages. I believe 1.21 or so is the stock setting (on my board anyway) and that voltage was good for up to 3.8 GHZ. I think the "uncore" was default to 1.23 or so.

I've been running stable at 4.0 (200 blck and multiplier limited) with 1.25v or so. I had it at 4.2 and was stable in Prime95 (temps in the mid to upper 70s) but gaming was unstable. My temps with 4.0 GHZ are upper 30s-mid 40s idle and 55 or so during gaming.

Oh yeah, I have HT off as it adds quite a bit of heat at 4 GHZ and up....
March 10, 2011 11:55:20 PM

right now my bclk 131 Mhz
cpu voltage 1.22500V
Dram bus voltage 1.65V
QPI/Dram core voltage 1.37500V

even an 3.6 OC with turbo n HT "on" is ok for me.
plz tell me the settings for my mobo asus p6x58de for OC

right now my voltage is on auto.
March 11, 2011 1:32:21 AM

After seeing your voltages I'd say your QPI/DRAM voltage is way too high. I thought it should be very close to CPU. You should read up on that.

So right now I'm running:

BLCK: 200
CPU: 1.237V
QPI/DRAM: 1.237V --> Auto had mine way too high as well...
IOH: 1.144V
IOH PCI: 1.508
ICH: 1.111
DRAM BUS: 1.654

I have the multiplier set to 21, with HT and Turbo off. I have the power saving on, so the CPU changes between 12-21 multiplier. This puts my memory @ 1603 MHZ with timings of 7-8-7-20 if I remember correctly.

This gives me a max CPU of 4.2 GHZ and I just finished several hours of Fallout New Vegas with my CF 5850's @ 825/1100 without issue.

I think I saw my CPU max @ 55 degrees and the GPUs max @ 66 degrees. I think when I had this setting with HT on i was in the mid 70's for temps during Prime 95.
March 12, 2011 1:58:45 AM

i need HT n Turbo for my multi n single threaded rendering, i need an 3.6 OC
what exact value's i need to set on my P6X58DE mobo ?

QPI/Dram core voltage 1.37500V - shud i decrease it ?

what mobo do you have ?
March 12, 2011 12:20:25 PM

crazywingman said:
i need HT n Turbo for my multi n single threaded rendering, i need an 3.6 OC
what exact value's i need to set on my P6X58DE mobo ?

QPI/Dram core voltage 1.37500V - shud i decrease it ?

what mobo do you have ?


Nobody can tell you the "exact value" you need to set your system to. You'll need to experiment and see what works for your system.

I'm running an Asus Rampage 3 Formula.

I think you should decrease the QPI/Dram voltage a little.

Have you read up on overclocking an i7 yet?
March 13, 2011 1:56:57 AM

firebird said:
Nobody can tell you the "exact value" you need to set your system to. You'll need to experiment and see what works for your system.

I'm running an Asus Rampage 3 Formula.

I think you should decrease the QPI/Dram voltage a little.

Have you read up on overclocking an i7 yet?



not yet, once i have read chucks guide to OC.
I was worried abt the OC coz my stock temps are too high, OC will increase it so still haven't tried OC.
can you plz tell me what QPI/Dram core voltage exactly does ? shud i keep it 1.2500V ? the existing is 1.37500V.
April 14, 2011 1:53:36 PM

Hi Please need help

I have a i7 950 running 4.4 ghz stable on water cooling with 1.43 Core volt and 1.47500 QPI volt Dram Volt is at 1.65.

I have a P6X58D-E mobo when i try pushing the cpu over 4.5 ghz i get 'BSOD' at windows load screen strugling to get it past this wall any help please?

i7 950 4.4ghz Stable
6 GB CMP6GX3M3A1600C8 (OC to 1870mhz)
GTX 480 (oc to 850/1945 (mem clock) 1.1 core volt) 47C idle and 80C load with Shaman cooler
P6X58D-E
1200 WATT PSU
5 TB HDD space
April 16, 2011 4:09:00 PM

Yea reaper667 i decided to overclock this morning.

I have an i7 950 and same mobo. The problem I found when i set my settings it restarted my whole bios to default setting my AHCI hdd to ide and not letting me boot to windows worth a check. Other thing try going default seeing if that boots up if it does must be with your settings.

Hows your temps btw?
Im hitting 4.2ghz @ 1.32 (dont remember the exact number.) with the h50 temps havent gone past 80C.

oh and btw some ram voltages dont need to be as high as 1.65, i ran memtest86+ for about 6 hours as well, no errors at 1.56 6-8-6-24 CR1 1600mhz.
April 19, 2011 1:59:18 PM

hi Espada

My core temp is at 31 C and 75 C under max load with the 4.5ghz now the settings are still the same but my QPI volt is now set to 1.50625 running stable at moment ran heavy load for a hour and no blue screen yet
April 19, 2011 4:49:13 PM

dang your qpi is alot high than mine. Whats your vcore for on your cpu. Oh and btw I ran my first OC for an hour and it was stable and decided to run it longer late noticed most oc settings would crash between 2-5hrs. i ran for 12hours on the settings I have no crash.
vcore=1.33125
qpi-1.3
i think the max "safe" volts for each i think intel has is 1.4 i try to stay under that but if its work for you gj! :) 
!