Sign in with
Sign up | Sign in
Your question
Solved

Will a 560w PSU work out with the Sapphire R9 280 3gb version?

Last response: in Graphics & Displays
Share
June 14, 2014 1:37:46 PM

The PSU is an LC-Power:
Wattage: 560W
Compatibility: ATX 12V 2.3
+ 3,3V / 30 A
+ 5V / 28 A
+ 12V 1 / 17 A
+ 12V 2 / 18 A
80+ Bronze Certification
June 14, 2014 1:45:39 PM

There isn't much info about LC-Power PSUs out there and what little I see about the brand does not appear to be particularly flattering.

It will probably work but possibly not for long.
m
0
l
Related resources
June 14, 2014 2:05:46 PM

I wouldn't risk it; Your PSU only has 420W (35A) on the 12V rail(s), and that's theoretically (the 17A and 18A readings can probably only be achieved when a single rail is used). That GPU has a TDP of 250W, leaving only 170W (probably less) for your CPU and a few other components.
m
0
l
June 14, 2014 2:25:27 PM

Eduello said:
I wouldn't risk it; Your PSU only has 420W (35A) on the 12V rail(s), and that's theoretically (the 17A and 18A readings can probably only be achieved when a single rail is used). That GPU has a TDP of 250W, leaving only 170W (probably less) for your CPU and a few other components.

Well, my CPU is only 95TDP so I don't think I have to worry about that too much.
The R9 280 is only like 20€ more than R9 270x in my country, should I go with the R9 270x?
m
0
l
June 14, 2014 3:19:37 PM

Eduello said:
(the 17A and 18A readings can probably only be achieved when a single rail is used)

All PSUs with multiple 12V OCP rails are in a similar boat: each output can carry up to X amps but total combined output of all 12V rails cannot exceed Y amps or watts - this is very similar to 3.3V+5V combined power.

If the PSU has 30A/360W combined 12V rating and 17A are being used on one, there are theoretically 13A left for the other.

In practice, the PSU's quality may have a very different idea of what can or cannot be done.
m
0
l
June 14, 2014 5:45:16 PM

InvalidError said:
Eduello said:
(the 17A and 18A readings can probably only be achieved when a single rail is used)

All PSUs with multiple 12V OCP rails are in a similar boat: each output can carry up to X amps but total combined output of all 12V rails cannot exceed Y amps or watts - this is very similar to 3.3V+5V combined power.

If the PSU has 30A/360W combined 12V rating and 17A are being used on one, there are theoretically 13A left for the other.

In practice, the PSU's quality may have a very different idea of what can or cannot be done.

I used Cooler Master's PSU calculator and it showed 455 W minimum recommended for my system, maybe there's still room for a bit of overclocking? or is it too risky? https://drive.google.com/file/d/0B3H00pgPDsIlY3BhcUFxSk...
m
0
l

Best solution

June 14, 2014 6:48:56 PM

dpfinland said:
I used Cooler Master's PSU calculator and it showed 455 W minimum recommended for my system, maybe there's still room for a bit of overclocking? or is it too risky?

You have an LC-Power PSU. What few comments and review I have seen about LC PSUs say they are so-so quality at best and what that usually translates to is PSUs that have short life expectancy when under significant load. Between the CPU, GPU, fans, HDDs and possibly other accessories, you might be pulling over 300W peak from the 12V rail which is probably more than 75% of the combined 12V rating on that PSU.

So-so reputation + 75% load are usually about as compatible as high voltage and salted water.
Share
!