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Do I have enough watts?

Hello guys, I have a problem, i'm planning to purchase a new graphics card (Asus GTX 750 Ti) but I was wonder if I have a large enough power supply to fuel all of my parts. (Sorry i'm not very good at computer things and english is not my first language)

Specs:
In-Win Power-Man IP-P400AQ2-0 400W PSU
Intel Core 2 Quad Q6600 2.4GHz
Nvidia 9500GT (upgrading to ASUS GTX 750 Ti)
WDC WD2500AAKS-00B3A0 ATA Drive 232 GB
DVD RW Drive 1x
Intel DQ35JO Motherboard
DDR2 2GB 2x RAM

And if i need a new PSU how many watt do I need, and what brand??
Thank You
(I know very old system but it can still run very good game)
6 answers Last reply Best Answer
More about watts
  1. If you are in the US, get the XFX TS 550 $26 after $25 rebate and $10 coupon

    http://www.newegg.com/Product/Product.aspx?Item=N82E16817207013

    Power supplies tend to degrade over time.
  2. Pondering said:
    If you are in the US, get the XFX TS 550 $26 after $25 rebate and $10 coupon

    http://www.newegg.com/Product/Product.aspx?Item=N82E16817207013

    Power supplies tend to degrade over time.


    I don't live in the US, I live in New Zealand, but does this mean that I don't have a large enough PSU?
  3. Its rather hard to tell, since you didn't list what PSU you currently have.
  4. hunter315 said:
    Its rather hard to tell, since you didn't list what PSU you currently have.


    Oh sorry about that, I have a In-Win Power-Man IP-P400AQ2-0 400W PSU
  5. Best answer
    I could only find one review for that PSU, its by xbitlabs, it looks like you only have 300W available on your 12V rail, and that was when it was new in 2007. The efficiency is low, and the power factor is abysmal, i don't even think they put passive PFC in that thing! With the age of that unit and your now significantly increased load on the 12V rail, i would suggest upgrading the PSU, its lived a long life already, best not to risk it.
    http://www.xbitlabs.com/articles/cases/display/atx-psu8_7.html
  6. Ok thank you very much for your answer, i'll look for a new PSU
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