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PSU requirement for Intel I5 2500k

Last response: in Systems
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April 7, 2011 8:32:05 AM

Hello this is Aslam :hello: 

I want to know the P.S.U requirement for my new PC that i will be building next month when z68 board will release.

i'm mentioning full system configuration please suggest minimum P.S.U watts that i must buy for Intel i5 2500k ( Overclocking).


Intel I5 2500k ( i will be doing overclocking)

z68 series motherboard ( any company )

1TB HDD ( any company)

4gb DDR3 Ram

1 DVD writer

No addon Graphic card

Fans:-
1. 1 cpu fan
2. 2 computer cabinet fan
3. 1 PSU fan


currently i have I Ball cabinet ( Mercedes-Benz model )with 350 w power supply.

is that enough for above mention configuration.


*** should i buy a complete new cabinet with new P.S.U:o 
OR
*** should i use the same cabinet with a new P.S.U. :o 
a c 197 K Overclocking
April 7, 2011 8:59:19 AM

Without a graphics card, your PSU is adequate.
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a b K Overclocking
April 7, 2011 9:44:53 AM

Such a system would be extremely low wattage. 150W would would probably be fine. Look for a nice 380W unit.
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a b K Overclocking
April 7, 2011 2:46:27 PM

4745454b said:
Such a system would be extremely low wattage. 150W would would probably be fine. Look for a nice 380W unit.


150w would be fine?? LOL

The cpu is going to be more than 150w alone!!! :hello: 
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April 7, 2011 3:06:00 PM

geekapproved said:
150w would be fine?? LOL

The cpu is going to be more than 150w alone!!! :hello: 



This is with the onboard gpu disabled. I really doubt even if overclocked that it would exceed 150w, for the whole system 150w might be too close for comfort but a decent 300w would be a good way to go(one with a nice high efficiency rating)
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April 7, 2011 5:09:21 PM

That's a good deal on the antec, very good psu! I would jump on that too
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a b K Overclocking
April 8, 2011 3:21:10 AM

I severally doubt the CPU would use 150W or more.

http://www.guru3d.com/article/core-i5-2500k-and-core-i7...

Even a 2600K OC'd to 4.3GHz is only 178W. Might be a bit more depending on his OC settings, but 150W give or take a bit for the 2500k isn't unreasonable. Unless you want to show me a chart saying otherwise. As I said a good 380W unit will be fine, and the Antec 380/380 green is exactly the unit I was thinking of. (or the Corsair 430.)
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April 8, 2011 8:23:38 AM

Confused because of different reply.

i have i ball cabinet with 350w supply

i will be overclocking i5 2500k but with no graphic card i will be using z68 motherboard for integrated gpu.

now plz tell me. should i buy a new psu or my current 350w will work for my new pc.

Thanks. :-)
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a b K Overclocking
April 8, 2011 8:53:03 AM

I'm not sure how well an "iball" PSU will handle anything. Popular in india, they seem to be ok, but I have no knowledge of how good they really are. My gut says you'll probably be ok, but I wouldn't try any monster overclocks.
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May 21, 2011 12:31:42 AM

Use this http://www.antec.outervision.com/ to calculate power supply requirements.

If I'm not mistaken Intel has a section on their website for systems integrators. You can call Lenovo, Dell, HP or other manufactures, talk to the repair/technical services engineer there, ask the make and part number of PSU they using for a similar configuration and go ahead. The best part is you don't even have to pay for the tel call.

I guess your dilemma is if its worth spending additional $10-15 on a PSU. Power supply is not just wattage. You need to think of the output too and the investment you are making/cost of system, if the output is clean, sustained, stable etc. Reputed brand spend more on the circuitry and components that go in, quality cables and connector, an employee or human u can talk to if needed and a toll free number etc.


Personally I'd go in for the $10-15 brands like iball, intex, circle brands and not for Corsair after asking myself the following questions.

a. Are there any power cuts since last 1-2 years ? If so how many times in a year. Any situations like load shedding during summers, unscheduled power cuts, utilities drawing more supply from power grids leading to the whole dist. or states power grids tripping ?
b. How clean is the power ... 60 Cycle on paper, 50 cycles as claimed, less actually or even lesser in reality even further to the point of failure?
d. What is the outside temperature ...a simmering 40-45 deg centigrade ? What will happen to my PSU that already dissipates more heat. Will my system be stable ? Do I have support to fall back on if system is unstable ? Remember US and Europe are cooler so the chances of instability/changes in power output or quality due to temperature are less.
e. This being your first time are you willing to take risk of knocking off CPU or mobo or other components researching to use 2 PSU's.


The 400-500 Watt Rs 450- 750 power supply in all probability will work but will you want to risk your $ 500 - 600 system or spend another $10-15 more on a reputed brand? You will be recommended a 400 w or 500 w $ 10-15 powers supply because thats what the shopkeeper has in stock and fetches him more margin than what a reputed manufacturer will provide especially when all he does is stock just empty boxes.

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May 24, 2011 7:48:02 AM

genfin said:
Use this http://www.antec.outervision.com/ to calculate power supply requirements.

If I'm not mistaken Intel has a section on their website for systems integrators. You can call Lenovo, Dell, HP or other manufactures, talk to the repair/technical services engineer there, ask the make and part number of PSU they using for a similar configuration and go ahead. The best part is you don't even have to pay for the tel call.

I guess your dilemma is if its worth spending additional $10-15 on a PSU. Power supply is not just wattage. You need to think of the output too and the investment you are making/cost of system, if the output is clean, sustained, stable etc. Reputed brand spend more on the circuitry and components that go in, quality cables and connector, an employee or human u can talk to if needed and a toll free number etc.


Personally I'd go in for the $10-15 brands like iball, intex, circle brands and not for Corsair after asking myself the following questions.

a. Are there any power cuts since last 1-2 years ? If so how many times in a year. Any situations like load shedding during summers, unscheduled power cuts, utilities drawing more supply from power grids leading to the whole dist. or states power grids tripping ?
b. How clean is the power ... 60 Cycle on paper, 50 cycles as claimed, less actually or even lesser in reality even further to the point of failure?
d. What is the outside temperature ...a simmering 40-45 deg centigrade ? What will happen to my PSU that already dissipates more heat. Will my system be stable ? Do I have support to fall back on if system is unstable ? Remember US and Europe are cooler so the chances of instability/changes in power output or quality due to temperature are less.
e. This being your first time are you willing to take risk of knocking off CPU or mobo or other components researching to use 2 PSU's.


The 400-500 Watt Rs 450- 750 power supply in all probability will work but will you want to risk your $ 500 - 600 system or spend another $10-15 more on a reputed brand? You will be recommended a 400 w or 500 w $ 10-15 powers supply because thats what the shopkeeper has in stock and fetches him more margin than what a reputed manufacturer will provide especially when all he does is stock just empty boxes.





The way you explain is Too Good, but i have one more question

i have calculated that as per p.s.u calculator my P.S.U req. is under 500W and suppose even then i go for a LOW PRICE P.S.U of 800W will it give me the longer life span for computer, because it is developed to control 800W load and i will put Only 500W load.

Which is Better :-

1. to have low price 800W P.S.U for my 500W System requirement? **************

2. to have Branded ( Cooler Master )500W P.S.U for My 500W System requirement? ****************


If you have information please also let me know any Branded Power Supply which is very good but comparatively low Price then other Branded P.S.U???????????????? *************
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May 24, 2011 5:39:03 PM

^That is just ludicrous. A good brand 300-350w (hell even less considering you will not have a dedicated gpu) will do just fine. 800w will just cause the thing to run at its worst efficiency @ 24/7. You would simply be wasting your money.
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February 18, 2012 2:52:22 PM

i also got a question, i know have:
Intel Core2Quad Q6600 @3.0GHZ
Asus P5Q mainboard
Asus ENGTX560-Ti DCII Top graphics card
Coolermaster 520W PSU
Western digital caviar blue 7200RPM 1Tb harddisk
Samsung Spinpoint 7200RPM 500GB harddisk
6gb Kingston hyperx DDR2-1066 memory

i wanna upgrade to this:
Intel Core i5-2500K
Asus P8Z68-V LX mainboard
Asus ENGTX560-Ti DCII Top graphics card
Coolermaster 520W PSU
Western digital caviar blue 7200RPM 1Tb harddisk
Samsung Spinpoint 7200RPM 500GB harddisk
Corsair 8 GB DDR3-1600 Kit memory

Can my 520W psu handle this or do i have to buy a bigger 1 with more watt?
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