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How many watts does an overclocked i5 2500k draw ?
#1
Greetings.

Well, my friend saw my PC and got all enthusiastic about it. He brought the exact same specs as my build, but could only find 350W power supplies. So, should he buy one ? Here are his specs

Core i5 2500K
ATI Radeon HD 5750
MSI P67A-C43
1 Sata Hard disk
1 DVD Drive


He wants to overclock his i5 2500k to about 4.3 ghz. I'm really a noob Wacko but I told him to wait until I ask professionals Biggrin since I'm still learning about overclocking - can anyone please tell me how many watts this guy needs for his build ?

I know you're thinking "if he's a noob who doesn't know how many watts he needs for his build, then how come he's planning to overclock?"

well... He's probably gonna copy my settings once I've successfully overclocked my CPU Laugh
Intel Core i5 2500k 3.4 > 4.5 GHz 1.26v Biggrin
Thermaltake SpinQ VT
Nvidia GTX 560 (OC 950/1200), 1GB GDDR5, (MSI N560GTX).
Biostar TP67XE
8 GB Zepplin RAM, @1600. 11-11-11-30 Glare
FSP Saga II 500W
Windows 7 Ultimate x64 SP1
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#2
Check here:
http://extreme.outervision.com/psucalculatorlite.jsp

The difference can be rather small if he doesn't mess with voltages so if he can run the i5 2500k right now without problems then overclocking wouldn't be much of a difference either. However I would recommend getting at least 450-500w for a PSU even if not overclocking...
Core i5 3570k -- Geforce GTX 670  --  Windows 7 x64
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#3
Wow ! thanks Shadow Lady, this website is really something (although there are some things that I didn't understand...)

Well, the total result was 263w, but I'll still recommend him a 450w PSU as you said.
Intel Core i5 2500k 3.4 > 4.5 GHz 1.26v Biggrin
Thermaltake SpinQ VT
Nvidia GTX 560 (OC 950/1200), 1GB GDDR5, (MSI N560GTX).
Biostar TP67XE
8 GB Zepplin RAM, @1600. 11-11-11-30 Glare
FSP Saga II 500W
Windows 7 Ultimate x64 SP1
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#4
Yea, don't buy just 350W, even if it's from a good PSU maker.
The margins are too low then and the PSU will often work under overload conditions.
This will shorten the lifetime considerably and in a couple years the thing might go up in flame.
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#5
Definitely leave some headroom, especially since your key components won't see that whole 350W, but also because a PSU will draw more power than what's actually needed based on efficiency (I'm guessing that 350W is not too awful efficient).

A good ~500W power supply would be ideal. Smile
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#6
make sure he don't buy one of those 800W that priced at 10$ in little shops Wink

for more details about what's out there and prices check this : http://arabhardware.net/forum/showthread...985&page=1



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