Systemi7920 @ 3.8Ghz on air at 1.41 vcorenvidia GTx285Win7 64DDR3 6 gigMobo = Gigabyte ud3rNeed to upgrade from 3.8 Ghz and closer to 4.5Ghz etcoption 1 - i7920 DO stepping with coolit system elite liquid cpu cooler option 2 - i7975 extreme with Cooler master V10 air cooler Which system is more likely to hit the 4.5 Ghz mark, perosnally i prefer option one , cause it allows me to upgrade to better cooling, then i can buy i7975 a year later when price comes from 870

Both of those coolers are crap, both in terms of price and performance. If you absolutely must have 4.5GHz on an i7 you're going to need a very good water cooling setup, and not the kind you can buy in a single box. Otherwise, for 4GHz+ operation on air you'll need an extremely powerful cooler, something like Noctua's new DH-14 or Thermalright's IFX-14 (the Noctua is the better of the two, by a small amount).

Both of those coolers are crap, both in terms of price and performance. If you absolutely must have 4.5GHz on an i7 you're going to need a very good water cooling setup, and not the kind you can buy in a single box. Otherwise, for 4GHz+ operation on air you'll need an extremely powerful cooler, something like Noctua's new DH-14 or Thermalright's IFX-14 (the Noctua is the better of the two, by a small amount).

I have also heard less than complimentary reports about the V10. This from sources that like the V8... :(

Thanks for the info guys, would appreciate some more comments though.The question is D0 i7920 On liquid cooling ORI7975 On air cooling Which is more likely to reach stable 4.6 Ghz

You would have a better chance of getting to 4.6Ghz on liquid cooling however there is no guarantee you will attain a stable 4.6Ghz.I am running at 4.2Ghz on air with a Zalman CNPS10X Extreme.

You would have a better chance of getting to 4.6Ghz on liquid cooling however there is no guarantee you will attain a stable 4.6Ghz.I am running at 4.2Ghz on air with a Zalman CNPS10X Extreme.

Thanks i am thinking of getting Zalman Reserator XT with do i7920. cpu block only cooled.

You really should abandon your idea of using pre-configured water cooling "in-a-box" kits, they're not worth the money. If you're going to go water with the intention of reaching high overclocks, you absolutely have to piece together everything individually. Suggestion: start reading the liquid cooling section on Xtremesystems.org. This forum is frequented by some of the best overclockers in the world, no exaggeration.

You really should abandon your idea of using pre-configured water cooling "in-a-box" kits, they're not worth the money. If you're going to go water with the intention of reaching high overclocks, you absolutely have to piece together everything individually. Suggestion: start reading the liquid cooling section on Xtremesystems.org. This forum is frequented by some of the best overclockers in the world, no exaggeration.

Thanks for the info.The problem is, i have no plans to get my hands dirty doing this myself, cause of time and risk.I found a pc builder that specialises in OC systems and every kind of cooling you can imagine, but they turned out too expensive. They do custom liquid and phase stuff.Meaning the onlly options i have left are the best of the off the shelf stuff.My calculation is that , the off the shelf liquid cooling stuff, still would be better than air.But i dont want to work too hard for this, that why i am sticking to off the shelf stuff. If i found an affordable builder in herts uk , that would be great, but the last guy quoted

Your "calculation" is actually just speculation, and it is wrong. Not trying to be rude, just telling it like it is. Test after test from numerous hardware sites has shown that out-of-the-box water cooling kits actually perform worse than high-end air cooling, despite costing more and being significantly more complex to assemble and maintain. If you want specific advice on which parts to buy, visit the forum I linked you to above and ask those guys. If anyone can tell you what the best water cooling solution is, it's them.

Your "calculation" is actually just speculation, and it is wrong. Not trying to be rude, just telling it like it is. Test after test from numerous hardware sites has shown that out-of-the-box water cooling kits actually perform worse than high-end air cooling, despite costing more and being significantly more complex to assemble and maintain. If you want specific advice on which parts to buy, visit the forum I linked you to above and ask those guys. If anyone can tell you what the best water cooling solution is, it's them.

Ahh i see, never heard it said that top range air is better than off the shelf liquid cooling.The last thing i want is to go through the trouble of liquid, only to find not as good as air.I ll will have to take some time to look into this further, starting with the link you helped with.Thanks

Ahh i see, never heard it said that top range air is better than off the shelf liquid cooling.The last thing i want is to go through the trouble of liquid, only to find not as good as air.I ll will have to take some time to look into this further, starting with the link you helped with.Thanks

I do not believe that you can get to 4.5 GHz on any air cooling solution that will fit into a case unless you're going to run the PC in a meat locker with subzero ambient temps.4.5 GHz on a 920 is a long shot, too. That's as far as I have gotten my 975 on a very good custom-built water cooling system. To get the 920 that fast, you have to push the BCLK to 225 MHz. That's overspeeding the daylights out of a lot of other circuit components as well. It has been done, but it is not common.Honestly, your best shot at those speeds is to go with a 975 AND either a good water cooling system or a phase change cooler. I resolved my own concerns about water in the case by building my cooling tower outside the PC case, with the only connections inside the PC case being the two hoses going to the CPU cooling block. The reservoir, pump, and radiators are all in/above a deep plastic tray on the desk near the case.Also, FWIW, the Reserators are notorious for having noisy water pumps that go bad, as well as frequent alarms due to effects of even tiny air bubbles in the system.RegardsBob ScottColonel, USAF (ret)ATP IMEL Gulfstream II-III-IV-VColorado Springs, CO

Is going from an achievable 4.0 GHz on air really that different in price/time/performance of an expensive liquid cooled 975 @ 4.5GHz???Seems like a lot to spend to do that. Maybe save the money and try to get your 920 up a bit higher? Maybe wait another year for the next CPUs to come out...

Systemi7920 @ 3.8Ghz on air at 1.41 vcorenvidia GTx285Win7 64DDR3 6 gigMobo = Gigabyte ud3rNeed to upgrade from 3.8 Ghz and closer to 4.5Ghz etcoption 1 - i7920 DO stepping with coolit system elite liquid cpu cooler option 2 - i7975 extreme with Cooler master V10 air cooler Which system is more likely to hit the 4.5 Ghz mark, perosnally i prefer option one , cause it allows me to upgrade to better cooling, then i can buy i7975 a year later when price comes from 870

Hi,Forget the V10, it is not even close to some of the good aircoolers. Also as was pointed out water cooling kits will not get you any farther than a good air kit. You might want to cheack out the Mgeahalems, I have just set up my new system (see sig) and I am flying FSX at 4.4Ghz on quiet air on a I7-920 and I'm not done trying to go further, but with 12 gigs of ram its not as easy as six so I dont know if 4.5-6 will happen. I have a very uncluttered CoolerMaster 840 case that helps, and every single wire and cable is tucked out of the way and the only noisey fan is a not too noisey 1200 rmp Nochtua. I cant imagine haveing to have the pumps running and all the fans and the hasel. Here is a good review of the best of the best in heat sinks: http://benchmarkreviews.com/index.php?opti...1&Itemid=62 Here is a good place for parts, I may be biased as these guys are just miles from my home but they are a really good place for everything cool: http://www.frozencpu.com/

thanks for the link, if i go air it might be with i7975

thanks for the link, if i go air it might be with i7975

There is really no reason to get an 975, just throwing money away as a DO 920 will achieve as much and you can use the cash you saved to buy that fancy fermi card in March! :)Come, we all will hep you get there....