Sign in with
Sign up | Sign in
Your question

450w psu enough for a VTX3D 2GB AMD Radeon HD 7870 Le (7930) Black GDDR5?

Last response: in Graphics & Displays
Share
August 26, 2013 4:19:07 AM

title says it all really, i recently purchased this graphics card and completely forgot to check whether my psu will be able to run it or not. If it is not enough then can someone recommend me a good psu i could buy in the £40-£60 region?
a b U Graphics card
August 26, 2013 5:01:15 AM

You may or may not need to get a new PSU.

What's the make and model of the PSU? Rest of the system's specs?
m
0
l
a b U Graphics card
August 26, 2013 5:15:07 AM

I agree with ihog, there are many 450 watt supplies that would run that setup just fine if it was paired with an Intel Sandy/Ivy/Haswell line processor. There are lots that won't though because they are made with really cheap parts and the 450 watts is really in name only.

If you are looking for a cheap power supply, many people like the Corsair CX series, like the CX500. I'm sure you could find similar or even this supply cheaper, but http://www.amazon.co.uk/Corsair-Builder-Series-Bronze-S... is the first link I found while googling for UK prices.
m
0
l
Related resources
August 26, 2013 5:55:58 AM

The specs are:
450w channel well technology psu (came with the pc when I bought it)
Intel core i5-3330 3ghz quad core processor
8gb ram
And currently an msi hd 6670
m
0
l
a b U Graphics card
August 26, 2013 6:18:25 AM

Doe the sticker look like this ( http://www.ebay.com/itm/DSAII450S-G-Channel-Well-Techno... ) with 2 +12v ratings listed at 17A each . . . if so that might be pushing it a little bit but should work.

The trouble I think you will have is that if it's a dual rail design like then each rail can only supply 204 watts individually, and only 360 watts total between the two rails. You will probably be pushing somewhere near 270 watts and depending on how the connectors are connected to each rail you may end up overloading one if you need to use a Molex->PCIE adapter (since you will need 2 PCI-E cables).

It might be worth it just to upgrade it to a more reliable and trusted brand somewhere in the 500-600 watt range just to be sure even if it is working since you will be pushing near the capacity of one of the rails which generally isn't considered standard operation, you would normally want to be under about 75% of it's rated capacity (shooting for 50-75% so you have lots of headroom).
m
0
l
a b U Graphics card
August 26, 2013 10:13:29 AM

Yeah, new power supply is my recommendation. The 7870 pulls about 270W at load, according to the internet.
m
0
l
a b U Graphics card
August 26, 2013 10:20:07 AM

ihog said:
Yeah, new power supply is my recommendation. The 7870 pulls about 270W at load, according to the internet.


The Internet lies.


m
0
l
!