is my psu bottlenecking my gpu overclock?

[neagal]

Hey I am trying to learn overclocking but am having some trouble.
psu: 560 W
gpu: club 3d r9 290 royalace
cpu: i5 4690 k (4,5 GHz 1,25 volt)
mobo: gigabyte z97x soc
When I try to add more than 30 mV to my gpu for extra stabillity it chrashes when I run 3d mark firestrike as a stabillity test. I use msi afterburner as my overclocking utility. When it crashes it just falls out, it doesn't bluescreen or stop responding it just falls out. I already have my cpu overclocked a lot so I was wondering if it had to do with my psu not delivering enough power.

Sorry for the bad english and thanks in advance, Marcus

 

[bicycle_repair_man]

I'd say yes, the PSU is probably underpowered. Which make and model do you have?

 

[neagal]

I'd say yes, the PSU is probably underpowered. Which make and model do you have?

be quiet! Pure Power L7 530W so even 530 W

 

[bicycle_repair_man]

According to the manufacturer's spec, the 12V rails deliver 420W, which is what the GPU uses. At full load I'd estimate that the GPU draws around 400W, which doesn't leave you any headroom for the other components.

My presumption is that the overclock and stability test pushed the PSU beyond 100% load. Even without the overclock, your build would struggle with 420W. At 1080p gaming, I'd estimate that the GPU is drawing around 275W and the overclocked CPU is drawing around 120W, which would only leave you with 25W of power.

Long story short, you probably need a more powerful PSU. A good quality 650W unit should be fine.