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[Official] Polaris Owners Club - Page 257

post #2561 of 4140
Quote:
Originally Posted by DsLiadz View Post

I can't believe the S340 has such a bad airflow when the side panel window its on, i removed and ¿guess what? temps are really great now, i guess i will have to find some mesh to replace the acrylic window, something with holes, dust is gonna like this a ton more too, but hey, you can't have a dustless and well warmed case, unless you water-cool everything.

Thanks to the members that came to my help with suggestions, i really appreciate it. thumb.gif WTHr.2.jpg 286k .jpg file

Hey man, my 470 nitro hits 94-100C on my VRM1 temps max when I'm gaming every time. Undervolted my card slightly to get stable boost clocks all the time, but temps are still usually pretty high, I need to up my fan curve though because after the newest driver update my card's been WANTING to run cooler but the fans stay slower (55% vs 80%) sp I'm getting the same temps as I was before. I have to look and see if faster fans cool my VRMs any more or not.
    
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post #2562 of 4140
Quote:
Originally Posted by Tisser12 View Post

Hey man, my 470 nitro hits 94-100C on my VRM1 temps max when I'm gaming every time. Undervolted my card slightly to get stable boost clocks all the time, but temps are still usually pretty high, I need to up my fan curve though because after the newest driver update my card's been WANTING to run cooler but the fans stay slower (55% vs 80%) sp I'm getting the same temps as I was before. I have to look and see if faster fans cool my VRMs any more or not.

They suggested me a better case airflow, which in my case worked, also ive heard that vrm temps are good below 120ºC, did you by any chance ¿dissembled the card? if yes maybe a thermal pad slip off, if not, unless you have a good amount of experience opening cards i wouldn't recommend doing it ,checking the case having a good amount of fresh air entering the case also helps, or like i did i took the side panel window on my s340 and bam good temps overall, also ambient temp may affect your issue. I hope this help you in some ways. Good Luck thumb.gif
     
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post #2563 of 4140
Quote:
Originally Posted by Tisser12 View Post

Hey man, my 470 nitro hits 94-100C on my VRM1 temps max when I'm gaming every time. Undervolted my card slightly to get stable boost clocks all the time, but temps are still usually pretty high, I need to up my fan curve though because after the newest driver update my card's been WANTING to run cooler but the fans stay slower (55% vs 80%) sp I'm getting the same temps as I was before. I have to look and see if faster fans cool my VRMs any more or not.

Yep 1st try to bring up the fans speed and see if it enhance the vrm t°, witch it should.
Then try full speed fan and open case, check if the screws of the heatsink vrm side are well tight, i mean like the other screws on the board.
Vrm can endure t° till 110/120° depending on model, but will have 0 efficiency at this t°.
100° begin to be the limit for these chips, they run still fine but it is the limit imo.
U should keep them under 90/95° to be sure to get a decent current output.
Vrm have a certain efficiency depending witch t° they run, it mean at lower t° they will ensure max current output and voltage stability.
When the t° climb, the current output go down as the voltage stability.
Remember that the t° u read in gpu-z do not represent the real internal t° of each mosfets, they run even hotter.
And if i remember well the 120° max specified in the datasheet is the internal t°, so keep it in mind. smile.gif
Edited by Wimpzilla - 12/6/16 at 3:08pm
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post #2564 of 4140
Quote:
Originally Posted by Wimpzilla View Post

Quote:
Originally Posted by Tisser12 View Post

Hey man, my 470 nitro hits 94-100C on my VRM1 temps max when I'm gaming every time. Undervolted my card slightly to get stable boost clocks all the time, but temps are still usually pretty high, I need to up my fan curve though because after the newest driver update my card's been WANTING to run cooler but the fans stay slower (55% vs 80%) sp I'm getting the same temps as I was before. I have to look and see if faster fans cool my VRMs any more or not.

Yep 1st try to bring up the fans speed and see if it enhance the vrm t°, witch it should.
Then try full speed fan and open case, check if the screws of the heatsink vrm side are well tight, i mean like the other screws on the board.
Vrm can endure t° till 110/120° depending on model, but will have 0 efficiency at this t°.
100° begin to be the limit for these chips, they run still fine but it is the limit imo.
U should keep them under 90/95° to be sure to get a decent current output.
Vrm have a certain efficiency depending witch t° they run, it mean at lower t° they will ensure max current output and voltage stability.
When the t° climb, the current output go down as the voltage stability.
Remember that the t° u read in gpu-z do not represent the real internal t° of each mosfets, they run even hotter.
And if i remember well the 120° max specified in the datasheet is the internal t°, so keep it in mind. smile.gif


I just changed my fans to max out at 2750RPM and moved my target to 72C. My buddy pointed out I had a spot to put another fan in my case, so I plopped it in there and I'll see if it helps.
    
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post #2565 of 4140
Quote:
Originally Posted by Tisser12 View Post

Hey man, my 470 nitro hits 94-100C on my VRM1 temps max when I'm gaming every time. Undervolted my card slightly to get stable boost clocks all the time, but temps are still usually pretty high, I need to up my fan curve though because after the newest driver update my card's been WANTING to run cooler but the fans stay slower (55% vs 80%) sp I'm getting the same temps as I was before. I have to look and see if faster fans cool my VRMs any more or not.

Well you are lucky...
https://www.youtube.com/watch?v=EPwsLOX7Y_k

Nitro has some of the most endurable vrms (RX 480).
post #2566 of 4140
What's the general consensus on memory overclocking with these cards?

I have an RX 470 4GB at 1320/1875 on stock voltage and I'm not seeing much of a difference in performance whether its running at 1750 or 1875.
    
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post #2567 of 4140
For all NITRO users, VRM temperatures can be lowered by 15-20ºC by just changing the thermal pads and covering all the area.
post #2568 of 4140
Quote:
Originally Posted by Ansau View Post

For all NITRO users, VRM temperatures can be lowered by 15-20ºC by just changing the thermal pads and covering all the area.
Did literally nothing for me. 1mm thick Arctic Pad was used.
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post #2569 of 4140
Quote:
Originally Posted by IRobot23 View Post

Well you are lucky...
https://www.youtube.com/watch?v=EPwsLOX7Y_k

Nitro has some of the most endurable vrms (RX 480).

Yep, both high/low mosfets integrated in a single IC, witch have it own internal voltage regulation, like the guy said.
But the current output is locked at a definite max value and not scale with t° like other vrm as i said before.
So the current output to the gpu is constant over the t°, nevertheless keeping them under 90° is a good idea.
Quote:
Originally Posted by SLOWION View Post

What's the general consensus on memory overclocking with these cards?

I have an RX 470 4GB at 1320/1875 on stock voltage and I'm not seeing much of a difference in performance whether its running at 1750 or 1875.

Amd gpu got a wide memory bus, so coupled with 7Gb/s DDR5 give u a wide bandwidth, enought to not limit the gpu. So u will notice the gain of memory oc only if u oc the gpu quite enought.
Edited by Wimpzilla - 12/7/16 at 6:57am
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post #2570 of 4140
Quote:
Originally Posted by Wimpzilla View Post

Amd gpu got a wide memory bus, so coupled with 7Gb/s DDR5 give u a wide bandwidth, enought to not limit the gpu. So u will the gain of memory oc only if u oc the gpu quite enought.

That's not true. Even at stock core frequencies, having higher bandwidth helps with the performance. All Polaris gpus see significant improvements when tightening memory timings. Even the 480 8GB gets improvements when pushing for 2200-2250MHz.
That's the reason why 480 4GB performs worse than 8GB, and while 470 8GB NITRO nearly matches 480 4GB performance, as it's running 2000MHz.

Polaris is bandwidth limited. One of the reasons why we haven't seen any new chip bigger than Polaris 10 and why AMD is so eager to jump to HBM2.
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