R9 390 and XFX XTR 650W

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Eeek. Well, that's getting a bit closer to what I would consider a hard limit. One of the previous posters mentioned that it was a 270w card and could draw 400w. But - I've seen system tests (i5-4690k, gaming mobo, drives, r9-390) total SYSTEM draw was 380w on average. Which is, as I mentioned...
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Rookie_MIB

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Depends on the full build. In general though, a 650w and a nominal build (i5, 1 or 2 drives, a few fans) you should be ok. At 200w for the GPU, 80w for the CPU, 100w for the motherboard/misc stuff you're below 400w total draw on a 650w psu which is only 60% or so load.
 
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Hendaia_xg

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Sorry I forget to say that I have a FX 8370 and x2 HDisks (SDD+normal).

If I get the 390 my idea is to OC the FX to 4500/4600MHz. It is working now at 4600MHz without modify the voltage (however I changed some special settings in the bios, for some reason it did not OC too much without that).

So, FX 8370 @4600MHz and 2 hard disks, cpu cooler fan, x4 case fans.
Thanks for reply, hope that now with that info I get solid opinions.
 
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Rookie_MIB

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Eeek. Well, that's getting a bit closer to what I would consider a hard limit. One of the previous posters mentioned that it was a 270w card and could draw 400w. But - I've seen system tests (i5-4690k, gaming mobo, drives, r9-390) total SYSTEM draw was 380w on average. Which is, as I mentioned, right about where I guestimated at. Now, the difference is that your build is about 30-40w higher draw on a STOCK cpu, plus overclocking draws exponentially more power the higher you go. You could be hitting upwards of 500w on the system draw.

That in and of itself isn't a concern, but if you're going to overclock the GPU, as well, I'd get a different PSU. The reason why isn't necessarily load issues, it's a matter of the efficiency sweet spot. Ideal range is to have a max load of 50-75% of the rated power as the PSU is most efficient in that range. At 500+ watts, you're getting close to being out of that range (75% of 650w is 490w). That's generating excess heat and noise.

Yes, it WILL handle it, but at the expense of potentially shortening the life of the PSU (heat is thine enemy).
 
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madmatt30

madmatt30

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I'm with rookie 100% on that , without a doubt youd be hitting 500w+ at heavy loads.

I'd personally go with a 970 over the 390 anyway - performance is close enough to be negligible & the 220w max draw & much much lower temps on the 970 sealed the deal for me personally.
 
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Rookie_MIB

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Actually - the 970 is rated at a -lower- power than the R9-390. The 390 is rated around ~200w TDP, the 970 GTX (in stock trim) is ~150w. If he goes with the GTX 970 he'll be in better shape with the 650w XFX by about 50 watts or so.

GTX970 is more expensive, but it's also a stupidly efficient design. I wish AMD would get rolling on that front.
 
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