R9 290x getting no signals

[amacar]

Wattage tells you nothing. You can have quality 450W PSU with ~450W (be quiet, XFX, super flower, seasonic, some Corsair series...) on 12V or you can have crappy 450W PSU (Lc power, energon...) with 300W on 12V. So quality PSU with 450W could be enough, but crappy can't.

[r3morph3d]

R9 280X can draw power from PCI-E (about 75W) and from 6pin + 8pin (175W) or 8pin +8pin (200W), so max consumption is somewhere around 250W.

You can see consumption when mining:

let me tell you my system configuration for this rig

Motherboard: Asrock 990fx Extreme
Cpu : Amd Athlon x2
Ram : 4GB DDR3 @1600
HDD : Sata 250GB

All this powered with a 550Watt Heroichi power Supply.

GPU's : 1x Asus R9-280X DirectCU II TOP  http://www.guru3d.com/articles-pages/asus-radeon-r9-280x-top-review,8.html

Power consumption Radeon R9-280X DirectCU II TOP

    System in IDLE = 119W
    System Wattage with GPU in FULL Stress = 352W
    Difference (GPU load) = 231W
    Add average IDLE wattage ~10W
    Subjective obtained GPU power consumption = ~ 243 Watts

           1x Asus Nvidia GTX550Ti http://www.bit-tech.net/hardware/graphics/2011/03/15/nvidia-geforce-gtx-550-ti-1gb-review/10

               System Wattage with GPU in FULL Stress = 248W

GPU's powered with a 650Watt Heroichi power supply. Using a 550w supply system restarts. So here is my proof that i'm not making assumptions.
Both power supply's are gold plus 80.

[FeelTheBeat]

So this is exactly what I wrote. Max consumption per GPU alone is ~250W in their test it is 243W.

All this powered with a 550Watt Heroichi power Supply

Sorry for telling you, but this is crap PSU.(http://www.e-shop.gr/heroichi-hc550te-550w-green-80plus-retail-p-PER.700118) Only 28A on 12V, so it can only give out 336W so no wonder that under full load (GPU 250W+ CPU and other devices 100+W, together 350+W, but this PSU can give only 336W) it will restart your PC.
Try buying for example XFX 450W, that has 34A on 12V, so much better than this crappy never heard of Heroichi.

[r3morph3d]

So this is exactly what I wrote. Max consumption per GPU alone is ~250W in their test it is 243W.

All this powered with a 550Watt Heroichi power Supply

Sorry for telling you, but this is crap PSU.(http://www.e-shop.gr/heroichi-hc550te-550w-green-80plus-retail-p-PER.700118) Only 28A on 12V, so it can only give out 336W so no wonder that under full load (GPU 250W+ CPU and other devices 100+W, together 350+W, but this PSU can give only 336W) it will restart your PC.
Try buying for example XFX 450W, that has 34A on 12V, so much better than this crappy never heard of Heroichi.

GPU's powered with a 650Watt Heroichi power supply. I assumed you misread the above. The fact you have never heard Heroichi doesn't mean anything. i've never heard XFX .... i'm familiar with thermaltake-hec-corsair-seasonic.

GPU's PS http://hecgroupusa.com/products/switching-power-supply/80-plus/ZEPHYR-MX-650/

Also those 2 Hec are leftovers from previous pc's.

[FeelTheBeat]

Yes I misread. But actually this changes nothing. 280X stil uses the same, 550ti uses ~110W so total consumption is again over 350W and that is too much for 12V of your 550W PSU.

And by the way XFX is seasonic OEM so uses same parts.
A quote from one of web sites:

XFX Core Edition power supplies use a Seasonic platform

One more reference, but you can find a ton of them: http://forums.overclockers.co.uk/showthread.php?t=18346241

Unlike other PSU vendors even the entry level range is Seasonic.

So even the cheapest XFX is same as seasonic not like lame Corsair that uses cheap materials for budget versions of PSUs and let buyers think that they made a good deal but actually bought "same shit" as LC Power.

[r3morph3d]

Yes I misread. But actually this changes nothing. 280X stil uses the same, 550ti uses ~110W so total consumption is again over 350W and that is too much for 12V of your 550W PSU.

And by the way XFX is seasonic OEM so uses same parts.
A quote from one of web sites:

XFX Core Edition power supplies use a Seasonic platform

One more reference, but you can find a ton of them: http://forums.overclockers.co.uk/showthread.php?t=18346241

Unlike other PSU vendors even the entry level range is Seasonic.

So even the cheapest XFX is same as seasonic not like lame Corsair that uses cheap materials for budget versions of PSUs and let buyers think that they made a good deal but actually bought "same shit" as LC Power.

Thanks for the tips m8 at least i learn something so the next ps should be XFX!!!

[FeelTheBeat]

Not necessarily XFX, depend on price in your country and what you need. Some other like "be quiet!", super flower, lepa are also good but not all series.
I am not fan of any PSU just usually take best price/performance, but currently in my PC is XFX 650W that I bought for 65€ and I was running my CPU, HDD, RAM, so all devices and also 1* 280X and 1*270 (mining ofcourse but 1 year ago) both overclocked to 1150/1500 for 280X and 1210/1450 for 270 and hadn't any problems.