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Overclocking my i7 3770k to 4.2Ghz with 650W psu

post #1 of 7
Thread Starter 
Ok basically im planning to overclock my i7 3770k to 4.2Ghz, but the problem is that i dont know if my power supply is capable of doing that.

Here is my specs:
i7 3770k
Sabertooth z77
Corsair GT 1866mhz 2X4gb
Msi Lightning Gtx 680
Hdd 1tb
SSD
CM GX 650W

the problem is im thinking of buying the corsair h100i to clock my stock speed. I need help if the h100i requires higher power to clock to 4.2ghz. Should change my psu or not. Thanks!
post #2 of 7
The power supply is not the greatest in your rig, but it wont have a problem powering a 680 and an overclocked ivy bridge.

http://www.guru3d.com/articles_pages/msi_geforce_gtx_680_lightning_review,10.html

System in IDLE = 140 W
System Wattage with GPU in FULL Stress = 313 W
Difference (GPU load) = 173 W
Add average IDLE wattage ~10 W
Subjective obtained GPU power consumption = ~ 183 Watts

http://www.guru3d.com/articles_pages/core_i7_3770k_and_3750_review_with_z77,12.html
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post #3 of 7
It's an awful PSU but should sustain what you are asking of it.

Safe than sorry, I'd start looking around for a better unit. You don't want a $600 GPU and what should be a $20 PSU.
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post #4 of 7
I'm very certain that it's possible with a H100i and 650W. The power supply will sustain.
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post #5 of 7
You will be able to overvolt the hell out of the lightning and the 3770k and still have plenty of juice to spare
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post #6 of 7
i have a quick question, what power supply recommend i7 3770k over clocking with a H100i?
post #7 of 7
Quote:
Originally Posted by mattnguyenn View Post

i have a quick question, what power supply recommend i7 3770k over clocking with a H100i?

PSUs tend to be overlooked by most (other than hard core PC builders) as they are not flashy like a high end video card or ram. But it's the heart of the system, and responsible for a lot of the stability of the rest. Kinda like the drummer in a band. He sets the beat, and a lousy drummer makes a lousy band, even though he is almost always not the lead singer or the flashy guy up front and center.

That being said, I believe in investing in a good PSU. That does not mean the most wattage or the most money. But one that will handle what you throw at it now and into the foreseeable future. When you upgrade the rest, it's nice to know the PSU is ok on the next build as well, or with that second or third video card down the road and the waterpump. So look at what you need to throw at it, calculate what you need it to produce, and get a good brand with some overhead. Right now I am using a Corsair, which I like as it is very quiet. Cables are not so great but they work. I've had good luck with Thermaltake and Zalman (which I have in a 24/7 server). Previously had excellent experience with Enermax but I am not familiar with their current offerings, and have also used Antec in the past. I am sure others here will chime in with their favorites.

Specifically to address your question though, impossible to say how much you need without knowing what else you plan on running on it, and what future upgrades you plan. But it's not that hard to add it up to get the wattage.

Just found this with a quick 'BING' http://www.thermaltake.outervision.com/ to help with the calculation. I just input my stuff (including a couple years of capacitor aging), and it came up with 1080w, and I have a 1200, so I'm in the ballpark with some breathing room.
Edited by tzvia - 3/20/13 at 8:29pm
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