Tom's Hardware > Forum > CPU & Components > Power Supplies, PC Cases & Case Mods > Will my current PSU will be enough?

Will my current PSU will be enough?

Forum CPU & Components : Power Supplies, PC Cases & Case Mods - Will my current PSU will be enough?

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Inf3rnal   10-04-2009 at 08:58:20 AM

Hello!

I'm upgrading my PC shortly and was wondering will my PSU be enough to power new components.

My current system:
AMD Athlon 64 4000+,
2GB DDR 400 ram,
nForce 4 mobo,
Asus GeForce 8800 GTS 640,
Creative X-Fi sound card,
some cheap 300W PSU,
and a couple of SATA drives...

And I want to change:
AMD Athlon 64 4000+ —> Core i7 860 (AMD TDP is 89W, i7 860 is 95 W)
2GB DDR 400 —> 4GB DDR3 1333/1600 (DDR3 is more energy efficient right?)
nForce4 —> Gigabyte 55 UD3

The problem is I really want that i7 860 (instead of Core i5 750), but in that case I can't afford new PSU (unfortunately waiting is not an option). If my math is right new hardware should run just fine untill Iam able to upgdate PSU? In worst case scenario I could unplug one of my hard drives and/or sound card :) What do you think?

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andy5174   10-04-2009 at 09:21:14 AM
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Enough? No way! It's far less than enough. You need at least a decent 550W PSU, such as the Corsair TX550. Corsair TX650/HX650 instead for extreme OC.

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Reply to andy5174
505090   10-04-2009 at 09:37:06 AM
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Minimum of a 400 Watt power supply.

Message quoted 1 times
------------------------------ E8400 : GA-EP35-DS3L : mushkin 4GB DDR2 800 : HD 2600PRO : 450W ATX12V : Windows 7
 Reply to 505090
andy5174   10-04-2009 at 09:49:49 AM
- 0 +

505090 wrote :

Minimum of a 400 Watt power supply.


400W Minimum for 8800GTS which require a "80 plus" 500W(=400/0.8) PSU. In addition, he needs a few more watts as he has lots of HDDs in it.

Reply to andy5174
Inf3rnal   10-04-2009 at 09:50:56 AM
- 0 +

andy5174 wrote :

Enough? No way! It's far less than enough. You need at least a decent 550W PSU, such as the Corsair TX550. Corsair TX650/HX650 instead for extreme OC.




So the new hardware will require much more power than my current setup? Does CPU TDP means nothing?

Reply to Inf3rnal
andy5174   10-04-2009 at 09:55:41 AM
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TDP = Thermal Design Power, which is the max tolerance of the CPU. You should never over power it unless you want to cook it. BTW, 300W is not enough even for your current setup if your gfx runs at its max potential. Guess you never play games that will max out your gfx!

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Reply to andy5174
Inf3rnal   10-04-2009 at 10:02:10 AM
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andy5174 wrote :

TDP = Thermal Design Power, which is the max tolerance of the CPU. You should never over power it unless you want to cook it. BTW, 300W is not enough even for your current setup if your gfx runs at its max potential. Guess you never play games that will max out your gfx!



I do play some games. But my CPU bottlenecks GPU...

Reply to Inf3rnal
shubham1401   10-04-2009 at 11:31:05 AM
- 0 +

Better buy a new PSU...
Anything 500w or above will be great.
Be sure to get a good brand PSU like Corsair,Antec,OCZ etc etc

Reply to shubham1401
rambo117   10-04-2009 at 06:23:16 PM
- 0 +

lol, thats a good one! xD

yahh, go with one of shubham's suggestions, 300W is a joke.

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 Reply to rambo117
enayet_redeemer   10-04-2009 at 07:33:00 PM
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You must upgrade your PSU along with CPU, RAM and Mainboard. A 450Watt PSU with 80+ rating will do. I don't know how you ran your PC with a 300Watts PSU and 8800GTS card. :ange:

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Reply to enayet_redeemer
shubham1401   10-05-2009 at 10:43:44 AM
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enayet_redeemer wrote :

You must upgrade your PSU along with CPU, RAM and Mainboard. A 450Watt PSU with 80+ rating will do. I don't know how you ran your PC with a 300Watts PSU and 8800GTS card. :ange:



Probably that card was not working on its full potential...


Reply to shubham1401
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