Is this PSU good enough

So i have this 400w PSU that i failed to identify the brand. So my question is could it run a 7770 without any problem. I have also ran 9800gt 1gb for 2+ years on it without any problem. The amperage on the rails is as it follows:
+3.3V - 20A
+5V - 16A
+12V1 - 14A
+12V2 - 13A
+5Vsb- 2.5A
-12V - 0.8A
12V1 & 12V2 max=324w

Other system specs are:
Core i3 2100
2x 4gb corsair Ram @ 1333
1 Sata HDD

I want to know if it will run without problems because I do not want to buy a new PSU. I think the 7770 will be a good upgrade over the old 9800. Any comment will be appreciated. Thank you in advance.
11 answers Last reply
More about good enough
  1. I already know what psu to get. If I need to buy a new psu i will go directly with the 6870, but I really need to save money.

    P.S Newegg links are of no value to me, I am not from USA.
  2. gonzalesxp, the HD 7770 requires about 25 watts less than the 9800 GT so since you have been gaming with that GPU then I'm guessing you will be fine with the HD 7770. The best thing would be to upgrade your PSU when you can.
  3. Desert Eagle said:
    gonzalesxp, the HD 7770 requires about 25 watts less than the 9800 GT so since you have been gaming with that GPU then I'm guessing you will be fine with the HD 7770. The best thing would be to upgrade your PSU when you can.


    You are right. 9800gt really is more power demanding. So yeah, I will buy it now and when i get more money I will buy a more acceptable Power supply and even OC.

    Anyway, is there a way i can check the 12V rail power requirement of the 7770? And also what does PFC mean?
  4. A 400W no-name PSU sounds like a house fire waiting to happen. I imagine it would probably power the 7770 just fine, but the question is how long. You need to be planning to replace that PSU as soon as you can if you can't right now.

    If your PSU fails catastrophically, it could cost more than the most expensive PSU on the market to replace the components it takes with it. Just putting back $20 a month will get you a high quality, low wattage replacement in a couple months time.
  5. Finally found the label! The Brand is FSP Group and the model is ATX-400PNR. Just had to look deeper.
  6. Quote:


    What do you mean?
  7. New PSU it is. Too bad :S
  8. gonzalesxp said:
    New PSU it is. Too bad :S

    Cheap PSUs are the biggest scam in computer hardware. It seems like it's something relatively unimportant, but it couldn't be farther from the truth. Your average user is just going to go "Hey, it's just a power brick, why should I pay $65 for 500 watts when this one is $25 for 650?"

    Then they buy that PSU that looked like an awesome bargain, only for the unit to burn out, blow up or catch on fire three months later. Now you need another PSU, but hey, that first one was just a fluke right? Maybe you spend $35 this time, and get six months out of it. Now that you see you can't go cheap and get a good unit, you go ahead and buy that $65 PSU, but you've basically paid $120 for it along with all the hassle of changing them out several times, and maybe took out some components in your computer too.

    Took me three PSUs and a HDD to learn that lesson. I remember being totally dumbfounded by $200 PSUs, and thinking nobody in their right mind would pay that much. Fast forward half a decade and I've got a $150 PSU in my system, and I'm planning on spending even more than that on my next build in 2013. You get what you pay for, and these PSUs are worth the extra cash.
  9. Sorry but from a simple question this turned into a lesson.
    The thread may now be closed.
  10. gonzalesxp said:
    Sorry but from a simple question this turned into a lesson.
    The thread may now be closed.

    You need to select a best answer to close the thread.
  11. Corsair 430w should do the trick. The Antec Earthwatts isn't available to me.
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