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4 Ghz possible on V8 CPU Cooler?

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  • Heatsinks
  • Overclocking
Last response: in Overclocking
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January 7, 2010 9:11:12 AM

Hi guys, this is to all the V8 owners out there (and people in the know). Has anyone reached 4 ghz on a cooler master V8 and had decent temps <70C under load (prime95 for example). I'm at 3.8 ghz on my i7 920, under load I can go as high as 75C at times. For thermal grease I used Arctic MX-3 applied using the single line method. The main purpose of this post is judge my results with the V8 against others to see if this is typical V8 performance or if I need to re-install the cooler again. My goal is to get my i7-920 to 4.0 ghz with temps under 65C under load. Possible with the V8? What do you think?

My Build:

Cooler Master HAF 922 Case
Antec Neo Power 500W PSU
Asus P6T Mobo
OCZ 6gb DDR3 Ram
EVGA GTX 260 Video card
2x WD Black 640 GB HDDs
Cooler Master V8 CPU cooler
Intel i7 920 CPU

My Setup:

OC: 3.8 ghz
Ai Tweaker: Manuel
Ai Overclock Tuner: 8-8-8-24 (my ram was not XMP so I entered manuel timings)
CPU Ratio Setting: Auto (20)
Intel SpeedStep Tech: disabled
Intel Turbo Mode Tech: disabled
Bclk Frequency: 190
PCIE Frequency: 100
DRAM Frequency: DDR3-1520
UNCLK Frequency: Auto
QPI Link Data Rate: Auto
CPU Voltage: 1.21250
CPU PLL Voltage: 1.88
QPI/DRAM Core Voltage: 1.21250
DRAM Bus Voltage: 1.66 (when you type 1.65 it changes to 1.66 automatically)
CPU Differential Amplitude: 800mV
Intel HT Technology: Enabled

PS: At this point I'm not willing to do any lapping (in case someone was heading in this direction)

More about : ghz cpu cooler

a c 126 K Overclocking
January 7, 2010 11:46:54 AM

If you really want 4ghz, you could disable hyper-threading which will bring down the temps by roughly 8-10C

But as the above poster said, theres very little point, You won't notice the difference.
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January 7, 2010 6:30:40 PM

Thank you both for the replies.

Has anyone found information on what the optimal setting for the i7 920 is in terms of longevity versus performance? Right now I'm sitting at 3.8 ghz, how much longer will my CPU survive if i down clock to 3.6? 3.4?

Also, If its not too much trouble i'm still interested in knowing the answer to my original question about V8 cooling results.

Thank you!
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a c 126 K Overclocking
January 7, 2010 7:29:20 PM

Well I cant help you about the V8 as I don't have one, but as regards to the other question I think the best performance vs longetivity is to Overclock you Ci7 920 as far as it goes with stock voltage, mine does about 3.5/3.6ghz on stock volts.

Although you could undervolt your CPU and still overclock to maybe 3ghz or so. But to be honest these CPU's will last for ages even at 4 ghz

You CPU is likely to outlast most pf your other components like your motherboard and PSU. besides most people upgrade every 2-3 years
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January 8, 2010 5:30:43 PM

This is what I thought I only need my CPU to last 3-5 years and I wanted to get some good performance out of it. I thought that 4.0 ghz would be a good setting to accomplish this. I thought a V8 would get me there, but so far it hasn't. I wanted to know has anyone done 4.0 ghz with a V8 (w/ safe temps) or should i sell it and get something better like a noctua or h50 that a lot of people talk about.

Thanks!
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January 8, 2010 5:38:16 PM

If you're worried about longevity, why not think about OC'n it a year or two down the road once it starts to show its age. That way if it's only got a year or two of life in it running at OC'd speeds... well, who cares?
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January 11, 2010 12:49:35 AM

I didn't try overnight, but after a few hours of prime 95 i was at like around 80, 85c.kinda high so i just stopped.
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January 11, 2010 7:18:51 AM

with an AMD cpu youll easily reach past 4 ghz with that cooler.
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a b K Overclocking
January 11, 2010 3:11:24 PM

According to technical reviews and articles I read, the sweet spot for overclocking an Intel Core i7 920 cpu is 3.4 to 3.6 Mhz.
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January 18, 2010 3:31:29 AM

I have a v8. Nice looking cooler I might add. I have a Q9650 3.0Ghz Quad Core running 3.4 Gigs right now on 1.37 Volts stable. I'm also very interested in finding out how high I can go.
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a b K Overclocking
January 19, 2010 6:07:48 PM

I have researched the V8 already in the past before I picked up my Core contact freezer. I choose the CCF because the V8 had a lot of complaints about the heat sink not performing as it should.

I have not found an article showing an i7@4.0 ghz with the V8 running anything lower then 73c. (lowest I have seen was 73c, one guy claimed that it stays at 43c@4ghz load but that is very very very very unlikely with an i7 920 maybe he meant 43c idle)

It is very unlikely you will be able to reach your 4 ghz clock with the V8 while staying under 65c.

Get water cooling if you absolutely must have 4ghz clock with longevity, of course a good water cooling setup would run you nearly $200-$300. Please don't get the closed loop water coolers (H50, Asetek LCC, etc) you need a dedicated water cooler with a dual 120mm radiator, water pump, core heat sink and reservoir.


$259.95 ($270~ shipped)
http://www.frozencpu.com/products/8411/ex-wat-140/Swift...

Or get it here (I have never heard of this company sidewindercomputers.com) for $239~ ($254 shipped)
http://www.sidewindercomputers.com/swh2edukit.html
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