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Can I run HD7770 GPU on a 400W PSU?

Last response: in Graphics & Displays
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February 28, 2014 9:00:34 AM

Hello everyone! One year ago I had made a thread here on Tom's Hardware, asking for opinions for GPU upgrading on my PC (with a 300W PSU). Although I was convinced the HD7750 was a good choice, I didn't eventually upgrade my old Geforce GS9600 (for some trivial reasons). Some time ago I found a 400W Power supply lying around my home, so I thought I could finally upgrade my computer with a better graphics card than HD 7750! After some research, I reached the conclusion that a 7770 would be a good buy. Looking around the manufacturer's sites, however, I noticed that some of those 7770s require 400W or even 500W! How can I be sure if my (no-name) 400W can still run this card? My current specs are:

Geforce 9600GS,
Intel Core 2 Quad Q9300 @ 2.50GHz,
400W Alimentation,
IPIBL-LB Benicia Motherboard,
1680x1050 Monitor,
500GB SATA HDD.

Thanks in advance!
February 28, 2014 9:06:23 AM

It should be OK but I never heard of that PSU brand before so I doubt it is a trustful brand.
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February 28, 2014 9:16:05 AM

PourRealLifeDownOnMe said:
Hello everyone! One year ago I had made a thread here on Tom's Hardware, asking for opinions for GPU upgrading on my PC (with a 300W PSU). Although I was convinced the HD7750 was a good choice, I didn't eventually upgrade my old Geforce GS9600 (for some trivial reasons). Some time ago I found a 400W Power supply lying around my home, so I thought I could finally upgrade my computer with a better graphics card than HD 7750! After some research, I reached the conclusion that a 7770 would be a good buy. Looking around the manufacturer's sites, however, I noticed that some of those 7770s require 400W or even 500W! How can I be sure if my (no-name) 400W can still run this card? My current specs are:

Geforce 9600GS,
Intel Core 2 Quad Q9300 @ 2.50GHz,
400W Alimentation,
IPIBL-LB Benicia Motherboard,
1680x1050 Monitor,
500GB SATA HDD.

Thanks in advance!

How much is the HD 7770 in your country? It looks to me like the 750 ti would be a better deal. It is faster and has very low power requirements. You should make sure your PSU delivers enough amps on +12v rail though.
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February 28, 2014 10:45:20 AM

AnEwG said:
It should be OK but I never heard of that PSU brand before so I doubt it is a trustful brand.


Alimentation I think means supply. I've seen other people using that word on the forums, so I used it as well so that I don't always use the term "PSU"! This is what its box looked like though: http://www.madshrimps.be/files/images/articles/No-name-...

OnkelCannabia said:

How much is the HD 7770 in your country? It looks to me like the 750 ti would be a better deal. It is faster and has very low power requirements. You should make sure your PSU delivers enough amps on +12v rail though.


HD 7770 costs around €99-102 in my country. But I'd rather not exceed my €~100 budget. Also, how do I check if my
PSU delivers enough amps on +12v rail?
Thank you both for the quick response!
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February 28, 2014 10:57:30 AM

The link you posted doesn't open. There should be a specification table printed on a sticker on the side of the PSU or in the manual or on the box. Of course this table won't mean anything if the PSU is generic. If you can specify the exact model and brand of your PSU it should be easy to find out its specifications if it is of a known brand.
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February 28, 2014 11:11:53 AM

AnEwG said:
The link you posted doesn't open. There should be a specification table printed on a sticker on the side of the PSU or in the manual or on the box. Of course this table won't mean anything if the PSU is generic. If you can specify the exact model and brand of your PSU it should be easy to find out its specifications if it is of a known brand.


It is not a known brand. It's strange though that you can't open the link. The box is a red one and says "Power Stability". I really don't know what brand it is.

It's really not easy to buy another PSU at the time.
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February 28, 2014 11:28:02 AM

PourRealLifeDownOnMe said:
AnEwG said:
The link you posted doesn't open. There should be a specification table printed on a sticker on the side of the PSU or in the manual or on the box. Of course this table won't mean anything if the PSU is generic. If you can specify the exact model and brand of your PSU it should be easy to find out its specifications if it is of a known brand.


It is not a known brand. It's strange though that you can't open the link. The box is a red one and says "Power Stability". I really don't know what brand it is.

It's really not easy to buy another PSU at the time.


Did you really look from all sides? If there is nothing on it, it might be some cheap low budget PSU in which case it might have very low specs. It would be a bit of a gamble to get a new GPU without knowing the details.

Regarding what GPU to get. The 750ti can be found as low as 120€ on mindfactory.de. I don't know where in Europe you live, but maybe you can find similar deals where you live.

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February 28, 2014 12:56:15 PM

OnkelCannabia said:

Did you really look from all sides? If there is nothing on it, it might be some cheap low budget PSU in which case it might have very low specs. It would be a bit of a gamble to get a new GPU without knowing the details.

Regarding what GPU to get. The 750ti can be found as low as 120€ on mindfactory.de. I don't know where in Europe you live, but maybe you can find similar deals where you live.



Well, I was talking about the package box. Sorry, that was my misunderstanding. I've finally returned home, so I took out the PSU and there was indeed a sticker. On the +12V rail it delivers 16A on 400W (and 20A on 500W, but I don't think this matters). I don't believe that's enough :(  What do you think?
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