View Full Version : can a 480 watt psu run a radeon 4770

09-28-2009, 03:06 PM
and an amd 65 w dual core 2.8, and 4 gigs of ram (if any other important info is needed, just say it)

09-28-2009, 03:14 PM
Generally, yes.

Would be helpful to know the exact output capacity, like the current on the 12 volt rail(s).


09-28-2009, 03:18 PM

its that :s (i know nothing about tech lol)

09-28-2009, 03:26 PM
If you haven't bought it yet: If you can afford it, I would strongly suggest you purchase a quality power supply separately, and a case without the power supply. I am fairly dubious about the quality; the user reviews say it has no 6 pin PCIe connector and only one SATA power connector.

If you've bought it already, be careful about using it, it may work fine but I wouldn't be surprised if it suddenly dies. You will need an adapter to power the 4770 (there should be one with the card) and hard disks if you have more than one SATA drives.


09-28-2009, 03:30 PM
ill take your advice and get a good one, thnx

09-28-2009, 03:32 PM
These two are highly recommended and would suit your build perfectly:

Would suggest a Corsair or PCP&P instead, for a few more dollars.



09-28-2009, 03:40 PM
huh? those are too low, the 4770 needs a 450 minimum

09-28-2009, 03:47 PM
huh? those are too low, the 4770 needs a 450 minimum

They put a minimum based on guarantee. If you have just about any 450W you should be able to RUN a 4770.

Corsair is different, they always have a lot on the 12v rails (just so you know, it's really the most important number).

Those PSUs would be fine, stable, and safe.

09-28-2009, 03:47 PM
Yeah, 450 watt if you're running a generic unit like the one that comes with the case. But those units are more powerful than the generic ones as they deliver more current (reliably) to the important 12 volt rail.

The Corsair has 30A, so 30x12 = 360 watts. Your 4770 probably does about 100-120 watt max, so there's plenty to spare for the processor and other components.

It's about the same thing for the PCP&P (27A).

Heck I've built a PC with the 400 watt Corsair powering a 4870, still works fine.


09-28-2009, 03:53 PM
Simple article on this (http://compreviews.about.com/od/cases/a/PSUWattage.htm).

And, of course, http://www.jonnyguru.com/.

09-28-2009, 04:07 PM
I wouldn't buy anything from LOGISYS. I used to sell those case & power supplies. They are complete junk. At least the power supply is. They mark them higher then they really are, for example a 480watt PSU is only around 400 - 420 at best. Plus the power efficiency is really low, like around 70%.

If you can afford to, buy Thermaltake or Corsair.
Unless a motherboard, cpu, or video card calls for a certain minimum power supply wattage, or amps on the 12 volt rails. I would go with something like a Thermaltake PurePower 500-watt. They are good and not too expensive, the efficiency is really good too.

09-28-2009, 05:42 PM
A corsair 400 watt or 450 watt would do perfect. I ran a 4870 on a corsair 450 watt :)

09-29-2009, 11:34 AM
The ATI 4770 is rated at 80w max, and that's the only reason it needs a 6 pin power connector, the PCI Express socket outputs 75w by it self.

A mid ranged name brand PSU will do fine 400-500w, like the others have said though most cases that come with power supplies are horrible, and the ones that come with decent ones are overpriced for what they are giving you anyways.