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i7 860, These voltages safe? - Page 2

post #11 of 30
Quote:
Originally Posted by metroidfreak View Post
Are these safe for 24/7 use at 3.8 with HT? First time overclocking the i7 860 and found these settings from a user on here from a week or so ago.

BCLK: 200
Multi: 20
Vcore: 1.35v
VTT: 1.35v
Ram: 1.60v (set to your rams specs)
PCH: 1.05v
PLL: 1.80v
PCIE: 104
QPI: 4.270 GT/s
MCH Strap: 1600 Mhz
CPU PWM Frequency : 849 Khz
VTT PWM Frequency: 634Khz
Definitely lower your VTT it shouldn't need to be above 1.27v (probably less) for that speed. I'm sure your vcore can be lowered as well.

Overclocking the pci-e is a last resort and usually reserved for extreme ocing.
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post #12 of 30
Thread Starter 
I tried 180 with a multi of 21x, and even at those highvoltages with the pcie as auto, it just blue screened at startup. I set the ram to 1.65v, as thats what it's factory setting is.
Edited by metroidfreak - 6/10/10 at 6:39pm
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post #13 of 30
I'm guessing you've stress tested your system at these settings?
post #14 of 30
Thread Starter 
No, I was only asking if they were safe. but even with those settings at 3.8 and HT off I cant get it to even boot without blue screening.
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post #15 of 30
good luck.
Edited by Spct - 6/10/10 at 8:48pm
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post #16 of 30
how is that helpful ^^ ?

Ive got the i7 860 and the P55 FTW board - and am trying to get mine fully stable.
for those of you quoting intels page - please dont......intel cover their asses by posting really low voltages.
as for the ocing:
Quote:
Originally Posted by cory1234 View Post
Definitely lower your VTT it shouldn't need to be above 1.27v (probably less) for that speed. I'm sure your vcore can be lowered as well.

Overclocking the pci-e is a last resort and usually reserved for extreme ocing.
PCI-E ~104 is fine (mines @ 104 too)
try nad get vtt lower and vcore lower - well yes - thats the aim of overclocking - fastest as possible with lowest voltage - but for the i7 860 you need to give it to it.

Mine atm:
(according to e-leet)
Vcore: 1.34375
PCH: 1.075
PLL: 1.9v
VTT: 1.375
DRAM: 1.65

Mines almost stable here - just smoothing it out.

Having 8gb of ram will mean you need some voltage increases also - im in the same boat as my 4gb runs @ 2000mhz....more ram/higher speed ram = larger load on the IMC and thus needs more voltage.

Im pretty sure i dont need my pll @ 1.9 - but im just trying to get it 100% stable then going to work backwards.

Also - in the bios - there is 3 PWM clocks (in the ocing area)
i COULDNT get mine 4ghz stable without ~1.45v vcore and 1.45v vtt until i manually maxed out all of those pwm values. take a look at them.

Also - the Strap speed (IMC, MCH or something) should be 1067 or more.
if mines < 1067 @ 4ghz only 2gb of my ram is recognised by windows.

Hope this helps a bit - see if we cannot get both of ours going 4ghz + HT stable 24/7
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post #17 of 30
Thread Starter 
Thanks for the tips. Time to get to work on it lol.
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post #18 of 30
I'm currently running 4Ghz stable (+HT) on a gd65, these settings may be of some help to you (Those EVGA boards tend to need less voltage to be stable - I am jealous). Anything less than this is instability central under verification loads (IBT/Prime/PI) for me.

BCLK = 191
Multi = 21 (left at default since I use EIST)

VCore = 1.365 (LLC on ~1.42 under full load)
Vtt = 1.345 (perfectly safe number)
PCH: 1.10
PLL = 1.93

You can turn these off, but I left them on since I often let my pc idle for a few hours at a time:

Cstates = On
EIST = On

I manually set my ram voltage to 1.506V since it is rated as 1.50V.

Let me know if there is anything else you would like to know. I've almost hit 4.1 and 4.2GHz stable (passes 9/10 IBT on high, passes all 10 on normal runs and does PI though 16M stable, fails at 32M on run 19), so I do have some decent clocking experience on the 860s with HT on. Most of my issues now are temperature related since I need to clean my radiator and figure out why my H50 pump is running ~20% slower than it is rated (thinking bad board header).
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post #19 of 30
thats a HUGE LLC jump......
tried setting it to ~1.37v and turn LLC off ?

im interested in your 4.2/4.1ghz clocks actually......

for the H50 - tried plugging it into a molex > 3pin ?
the bios might be throttling the pump somewhat thinking its a fan.
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post #20 of 30
For 4.2Ghz I use the following settings:

Multi - 21
CPU Freq. - 200
PCIE Freq. - 104
QPI Freq. - 4.270 GT/s
MCH Strap - 1600Mhz
EVGA vDroop control - Without vDroop
CPU boot - 1.375v
CPU eventual - 1.375v
Dimm - 1.65v
VTT boot - 1.375
VTT eventual - 1.375
PCH - 1.10v
PLL - 1.85
CPU PWM - 667
VTT PWM - 240
DDR PWM - 240
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