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[Official] AMD R9 390/390X Owners Club - Page 964

post #9631 of 11961
Man, I've been trying to push my card to the limit and I had nearly forgotten how nice it is to have it run cool and quiet. I just played a bit of BF4 at 1140/1625MHz with only 25mV of AUX voltage added (Yeah, my card can do 1140MHz at stock volts) and temps never exceeded 65C on both the core and VRMs. And it was quiet. It was so damn quiet I nearly started questioning whether the extra performance when overclocking is worth the noise. Then I realized I mostly play with headphones on, so I don't care. tongue.gif

PS : I was getting some pretty mediocre to bad temperatures after my last attempt at messing with my card and the thermal pad I put on the chokes was to blame, of all things. I just put a 1mm pad on there just 'cause, but it seems that that led to the cooler not making proper contact with the core, so I started seeing temps in the low 80s up from the low-mid 70s on the same clocks. At first I thought it was the ambient temp rising that caused it, but even with the AC on it was running hotter than before. So I took it apart, got a 0.5mm pad for the chokes and lo and behold, temps are back down. I just have some doubts about whether the cooler is now making proper contact with the chokes, but at this point I couldn't care less. I don't think chokes even NEED that much cooling to begin with and would be good with just the airflow of the card. Point is, I'm not taking my card apart again unless there's pretty good reason to do so. The only reasons I can think of is if I get my hands on some Kryonaut or if I decide to go water. Both are highly unlikely at this point, so there's that.
post #9632 of 11961
If i run my 390 at 1125 mV (-100), i use around 400-425w wall draw. Crossfire would certainly be possible on a 650w psu.

At 1325 mV it's about 525w at the wall. 850w would be enough.
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post #9633 of 11961
Quote:
Originally Posted by jdorje View Post

If i run my 390 at 1125 mV (-100), i use around 400-425w wall draw. Crossfire would certainly be possible on a 650w psu.

At 1325 mV it's about 525w at the wall. 850w would be enough.

Well on a 650w weve already said theres no way, youre only drawing that because of -100mv. Also you cant look at avg you have to look at peak so the psu doesnt overvolt and shut off. Also depends on cpu oc and what not.

Rough guess and from reviews a 290/390/x maxes out at about 300w or so peak. Two of those alone is 600w.
    
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post #9634 of 11961
Hey guys, I'm selling my PC, and just wanted to advertise it in this thread (Hopefully I can) I'm getting older, and need to get money for a vehicle. Anyways, here's the specs.

Case - NZXT S340
Motherboard - Asus M599FX Evo r.20
CPU - FX-8350
CPU Cooler - H80i GT
GPU - XFX R9 390
GPU Cooler - Arctic Acelerro Hybrid III 140mm
8GB AMD R5 RAM
128GB PNY Optima SSD
1TB Hard Drive
500 GB Hard Drive
750 Corsair CXM (I think it's CXM) Powersupply
140MM Noctua Fan
Custom LED Strips in the PC

Razer Deathadder Keyboard
1080p IPS Acer Display (Forgot monitor name)
And Snowball Microphone, Also willing to sell my steam account.. if anyone is interested in this build, PM me. Photos of the PC are on my instagram @corbinxtitus ...
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post #9635 of 11961
Quote:
Originally Posted by bluej511 View Post

Well on a 650w weve already said theres no way, youre only drawing that because of -100mv. Also you cant look at avg you have to look at peak so the psu doesnt overvolt and shut off. Also depends on cpu oc and what not.

Rough guess and from reviews a 290/390/x maxes out at about 300w or so peak. Two of those alone is 600w.

Of course it's only possible because of the undervolt; that's what i said.

I believe that test was with x264 and valley running at the same time, so about 125W ony 4690k. It's higher than any gaming power draw would be. I may test it again.

390x is moderately higher power use than the 390, simply from having 10% more cores and a likely higher stock clock and voltage.

Note I'm not actually saying i plan to do that. I have a 1050w psu (too cheap to pass up) and may add a second 390 this fall if the price is right.
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post #9636 of 11961
Quote:
Originally Posted by jdorje View Post

Of course it's only possible because of the undervolt; that's what i said.

I believe that test was with x264 and valley running at the same time, so about 125W ony 4690k. It's higher than any gaming power draw would be. I may test it again.

390x is moderately higher power use than the 390, simply from having 10% more cores and a likely higher stock clock and voltage.

Note I'm not actually saying i plan to do that. I have a 1050w psu (too cheap to pass up) and may add a second 390 this fall if the price is right.

I have a 1000w and im right at peak efficiency so im ok with that. If i do get a rx480 or even an rx490 or even a vega if its efficient ill go down to a 850w depending on what their consumption is.

Problem is i despise people who like to run their psu at 80-90%, 1 its a bit less efficient and 2 you get more voltage ripple the higher the draw, higher ripple will end up giving you a less stable oc especially in a cpu where is very picky.
    
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post #9637 of 11961
Gotta love protection plans, should have a new 1000w psu this evening.
     
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post #9638 of 11961
so was thinking of getting ridd of the 390x and replace with rx480 but from a performance view it probably isn't worth it. I might wait for RX490 or Furyx 2?

Just don't want to muck around selling and loosing money unless its a decent performance upgrade
post #9639 of 11961
Quote:
Originally Posted by Irev View Post

so was thinking of getting ridd of the 390x and replace with rx480 but from a performance view it probably isn't worth it. I might wait for RX490 or Furyx 2?

Just don't want to muck around selling and loosing money unless its a decent performance upgrade

Vega make more sense for you yes.
your not really the targetgroup for the 480.
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post #9640 of 11961
Quote:
Originally Posted by flopper View Post

Vega make more sense for you yes.
your not really the targetgroup for the 480.

For 1080p the rx480 is perfect from what ive been seeing so far, if it OCs well even better. Vega is more then likely going to target 4k 60fps hoping, the rx490 if they come out with one should be geared at 1440p.
    
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