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[Official] Polaris Owners Club - Page 161

post #1601 of 4342
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Quote:
Originally Posted by BromoL View Post

Thats for the MDU1514 high side which has a relatively low duty factor. The MDU1511 on the low side is rated for 94A at 100°C. On the 6 phase RX 480 (that @Echoa has) thats plenty of headroom. It's mor than twice the TDP for the whole GPU.

from what i understand, that rating is for transient loads not constant load and even at constant load the low side isnt rated for 94A 100c. If it wasnt something to worry about then i wouldnt be able to trip over current protection on my RX 470 at far lower than 400A, at 100c I can trip it somewhere in the 180-230A range (didnt see exact current at time of crash) but it forces the system to shut off and wont display till it cools down. If I keep the current draw under 215A I dont have issues with over current. This still also depends on your leakage value which higher leakage will pull substantially more current than a low leakage part. You wont have to worry every about transient current loads on the 470 or 480, but with high leakage you can pull enough current @ 100c to force a shutdown
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post #1602 of 4342
I still dont see the problem. The original question was in context of an air cooled RX 480 reference PCB with 6 phases and VRM temperatures in the low 90s. The RX 480 has very similar power draw compared to the RX 470. Under those conditions i still believe that everything is fine and better cooling is not strictly neccessary.

I am not saying that everybody should aim for 100°C VRM temperature. And better cooling is always desirable.
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post #1603 of 4342
Thread Starter 
Quote:
Originally Posted by BromoL View Post

I still dont see the problem. The original question was in context of an air cooled RX 480 reference PCB with 6 phases and VRM temperatures in the low 90s. The RX 480 has very similar power draw compared to the RX 470. Under those conditions i still believe that everything is fine and better cooling is not strictly neccessary.

I am not saying that everybody should aim for 100°C VRM temperature. And better cooling is always desirable.

I was just saying it depends on your leakage value if that's OK or not because high leakage may draw too much current. If he's not tripping over current he's fine. Still ideally you want them at 70-80c
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post #1604 of 4342
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post #1605 of 4342
Thread Starter 
Quote:
Originally Posted by OrangeRaptor View Post

14157

Firestrike score? tongue.gif

I wish I got that but I'm happy with my 13.1k @1350/1800(1375 timing) which is on par with my 1100/1375 290x
Edited by Echoa - 9/27/16 at 12:41pm
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post #1606 of 4342
Quote:
Originally Posted by Echoa View Post

Firestrike score? tongue.gif

I wish I got that but I'm happy with my 13.1k @1350/1800(1375 timing) which is on par with my 1100/1375 290x

No. Dont know why thats posted here. I typed that in my discord server..... weird
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post #1607 of 4342
Has anyone has a Sapphire RX480 Nitro+ OC 4GB here?

I'm dealing with something weird. Benching the card with 3DMark i can see that it throttles a bit when it reaches 145W power draw. Isn't this card supposed to come with a higher Max. Power Limit? I have checked the bios with Polaris Bios Editor and it's shows the Max. Power Limit set to 145W but i thought the Nitro series would come with a higher Max. Power Limit?
post #1608 of 4342
Thread Starter 
Quote:
Originally Posted by M3gNa View Post

Has anyone has a Sapphire RX480 Nitro+ OC 4GB here?

I'm dealing with something weird. Benching the card with 3DMark i can see that it throttles a bit when it reaches 145W power draw. Isn't this card supposed to come with a higher Max. Power Limit? I have checked the bios with Polaris Bios Editor and it's shows the Max. Power Limit set to 145W but i thought the Nitro series would come with a higher Max. Power Limit?

Did you raise power limit on wattman by 50%?
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post #1609 of 4342
Yes and that solves the problem. I just thought it would come with a higher Max. Power Limit out of the box.

Ended up undervolting the card and it doesn't reach the 145W max now.
post #1610 of 4342
I've tried 1450mhz clock though the VRM went enraged hahahah 98 C while gaming but the clock is consistant

But Because i only play mechwarrior online on 1440p scaling (native monitor 1080p) i usualy turn on eco mode and turn on the FPS target to 75 the vrms are a happy 65-67 degree

But what i notice that with 1266 mhz the the temparature is higher compared to 1350 mhz. Any one experienced this?

My asic is 86% though
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