How to get 4.2ghz

Nikao

Nikao

Nikao

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Joined
10 Feb 2010
Posts
28
No matter what i do i just cant get 4.2ghz with my setup, my setup is in my sig ,has anyone achieved this with a similar setup?

thx
 
Similiar system. Had it up to 4Ghz no problems. Had no luck at 4.2 yet. Might be a case of we've got chips or system combinations that "just won't". The better chips, with OCing potential are "cherry picked" sometimes... so it's down to luck of the draw for the rest of us I'm afraid!
 
Mines working like a dream @ 4.2Ghz with 12GB, though for some reason the ram refuses to run faster than 1200Mhz :(

I think it's:-

Vcore 1.35
Vtt:- 1.32
Ram:- 1.64

Then the rest at stock.
 
Can boot at 4.6Ghz but temps are crazy. I can run fully stable at 4.2Ghz with 1.23v load in windows.

These are my old settings i used on the f7 bios i think.

Code: 
4.2Ghz 920 D0 LinX stable 1600Mhz.

CPU Clock Ratio [20x]

Advanced CPU Features [Press Enter]:
CPU Clock Ratio [20x]
Intel(R) Turbo Boost Tech [Enabled]
CPU Cores Enabled [All]
CPU Multi Threading [Enabled]
CPU Enhanced Halt (C1E) [Enabled]
C3/C6/C7 State Support [Disabled]
CPU Thermal Monitor [Enabled]
CPU EIST Function [Enabled]
Virtualization Technology [Disabled]
Bi-Directional PROCHOT [Disabled]

Uncore & QPI Features [Press Enter]:
QPI Link Speed [x36]
Uncore Frequency [x19]
Isonchronous Frequency [Enabled]

Advanced Clock Control [Press Enter]:
standard clock control
Base Clock (BCLK) Control [Enabled]
BCLK Frequency (MHz) [200]
PCI Express Frequency (MHz) [AUTO]
C.I.A.2 [Disabled]

advanced clock control
CPU Clock Drive [ 800mV]
PCI Express Clock Drive [ 900mV]
CPU Clock Skew [ 100ps]
IOH Clock Skew [ 0ps]

Performance Enhance [Turbo]
Extreme Memory Profile (X.M.P.) [Disabled]
System Memory Multiplier (SPD) [x8]
DRAM Timing Selectable (sPD) [Manual]

Channel A

CAS Latency Time 8 [9]
tRCD 8 [9]
tRP 8 [9]
tRAS 20 [24]

Channel B

CAS Latency Time 8 [9]
tRCD 8 [9]
tRP 8 [9]
tRAS 20 [24]

Channel C

CAS Latency Time 8 [9]
tRCD 8 [9]
tRP 8 [9]
tRAS 20 [24]


Advanced Voltage Control [Press Enter]:
Load Line Calibration [Enabled]  
CPU Vcore 1.15v [1.28750v]
QPI/VTT Voltage 1.150v [1.320v]   
CPU PLL 1.800v [1.840v]

MCH

PCIE 1.500v [1.540v]
QPI PLL 1.100v [1.140v]
IOH Core 1.100v [1.200v]
ICH I/O 1.500v [AUTO]
ICH Core 1.1v [1.200v]

DRAM

DRAM Voltage 1.500v [1.660v]
DRAM Termination 0.750v [AUTO]
Ch-A Data VRef. 0.750v [AUTO]
Ch-B Data VRef. 0.750v [AUTO]
Ch-C Data VRef. 0.750v [AUTO]
Ch-A Address VRef. 0.750v [AUTO]
Ch-B Address VRef. 0.750v [AUTO]
Ch-C Address VRef. 0.750v [AUTO]
 
Bradley8988 said:
Can boot at 4.6Ghz but temps are crazy. I can run fully stable at 4.2Ghz with 1.23v load in windows.

These are my old settings i used on the f7 bios i think.

snip
Click to expand...

try doing that with loadline calibration off... it's worth it considering the potential damage you can do to the cpu.

4.1GHz @ 1.38v (LLC off) - temps max at 76; tried for 4.2, but need over 1.4v to get it stable, and tbh, i don't want to go any higher than that
Click to expand...
 
I've been massively struggling to get mine fully stable at 4.2GHz, even with a vcore of around 1.4. Going to have a bit more of a play around this week, see what I can come up with.
 
I can't get mine to 4.2 stable either. Will also have another go this week.

@OP it would be useful to list what you've tried. Telling us you've tried everything you can think of but not saying what isn't particularly helpful.

@Bulldog/rjk, if 4ghz is easy, and 4.2 a challenge, which is the more interesting?
 
I agree it the challenge tbh. I hit 23k Vantage points with sig setup, including 38k CPU with Physx help. I still would like to hit 4.2 with my Corsair H20!
 
nobody here saying why they cant hit 4.2Ghz, give us some more info on what BSOD's your getting and what your stressing it with and we might be able to help :)
 
You, like most (including me), are probably limited by how much you can overclock your i7 by the limitations of it's IMC (Internal Memory Controller) and the standard of cooling that you are using.

It should be said that it is not a God-given right to run you CPU at whatever speed you fancy, or at speeds that other people run at. Every chip is different and has different limits - perhaps 4GHz is your i7's limit?

What speed are you running your RAM at for 4GHz? What QPI/VTT voltages are you using? These are the settings I would be looking to decrease and increase respectively in your quest for 4.2GHz.
 
ejr22 said:
You, like most (including me), are probably limited by how much you can overclock your i7 by the limitations of it's IMC (Internal Memory Controller) and the standard of cooling that you are using.

It should be said that it is not a God-given right to run you CPU at whatever speed you fancy, or at speeds that other people run at. Every chip is different and has different limits - perhaps 4GHz is your i7's limit?

What speed are you running your RAM at for 4GHz? What QPI/VTT voltages are you using? These are the settings I would be looking to decrease and increase respectively in your quest for 4.2GHz.
Click to expand...

Thanks for stating the bloomin' obvious :) :)

I have got a Nahelem calc thingy magic which tells you what QPI/VTT should be for a given BLCK frequency but... being honest... I haven't played about yet. I tried 4.2 by only changing Vcore and it froze after 4 mins. Didn't try again because I am happy with my 4GHz and FPS in games. I don't code or anything and only use basic video editing software for fraps

If I manage to get to 4.2 I'd be worried about the long term affects. Do people have ASUS Turbo, which brings up the clock only when needed? I have it switched off and always sat at 4.0GHz now. Get about 38degC core temps with Corsair H50
 
Ultim8 said:
nobody here saying why they cant hit 4.2Ghz, give us some more info on what BSOD's your getting and what your stressing it with and we might be able to help :)
Click to expand...

Fair play. This is what i was using at 4.2, ud5, i7 920, 12gb of corsair ddr3.

Code: 
Clock ratio 20
Turbo disabled
Cores enabled all
Multi-threading enabled

QPI link speed x36
Uncore frequency x16


BCLK 210 (MHz)
PCIe 100 (MHz)
CPU clock drive 700mV
PCIe clock drive 700mV

System memory multiplier 6
DRAM timing auto (8-8-8-24-2)

Advanced voltage control
Load-line calibration disabled
CPU vcore 1.375
QPI/VTT voltage 1.355
CPU PLL 1.8
PCIe 1.5
QPI pll 1.1
IOH core 1.14
ICH I/O 1.5
ICH core 1.1
DRAM voltage 1.66

Ibt and prime stable, but froze when moving large amounts of data to/from ram. I will solve this problem, but I haven't yet. I'm fairly sure my problems are related to the imc.
 
What mobo?

I run my core i7 920 at 21 x 200 on my Asus P6 OC Palm Deluxe v1

My i7 is a c0 so need 1.325v for it, but its water cooled.
 
BaDBoY_uK said:
Thanks for stating the bloomin' obvious

I have got a Nahelem calc thingy magic which tells you what QPI/VTT should be for a given BLCK frequency but... being honest... I haven't played about yet. I tried 4.2 by only changing Vcore and it froze after 4 mins. Didn't try again because I am happy with my 4GHz and FPS in games. I don't code or anything and only use basic video editing software for fraps

If I manage to get to 4.2 I'd be worried about the long term affects. Do people have ASUS Turbo, which brings up the clock only when needed? I have it switched off and always sat at 4.0GHz now. Get about 38degC core temps with Corsair H50
Click to expand...

Well from your posts it seemed to me that it was not so obvious to you. You have admitted that all you have tried to get to 4.2GHz is raise the vCore. This "obviously" hasn't worked because you have ignored QPI/VTT. The key to success when highly overclocking i7 systems is the QPI/VTT voltage and I doubt very much whether a "Nahelem calc thingy magic" will give you any sort of help with that.
 
Last edited:
ejr22 said:
Well from your posts it seemed to me that it was not so obvious to you. You have admitted that all you have tried to get to 4.2GHz is raise the vCore. This "obviously" hasn't worked because you have ignored QPI/VTT. The key to success when highly overclocking i7 systems is the QPI/VTT voltage and I doubt very much whether a "Nahelem calc thingy magic" will give you any sort of help either.
Click to expand...

Lol! I was being funny - hence the two smiley faces? - but you obviously consider yourself as the OC'ing Master, so I shall bow down. And, I meant the bit about the CPUs being different not the QPI/VTT bit.

Climb down from your horse, chill a bit and thanks for your continued help!

/rant
 
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