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RX 480 overclock discussion

post #1 of 433
Thread Starter 
I've been playing around with the 480 since I received it this afternoon. Here are my latest results and current settings;

RX 480 Xfx Black ed. - 1328/2050

Power Limit changes
10% - http://www.3dmark.com/fs/9047245 - 67c - 12672 graphics score
20% - http://www.3dmark.com/fs/9048719 - 67c - 13402 graphics score
30% - http://www.3dmark.com/fs/9048588 - 69c - 13204 graphics score (dropped)
40% - http://www.3dmark.com/fs/9048650 - 70c - 13391 graphics score
50% - http://www.3dmark.com/fs/9048859 - 74c - 13732 graphics score

All done with a 25mv undervolt and fan speeds at 2600/3800

Lowest undervolt I've been able to achieve was 35mv while keeping clock speeds at 1328

Highest core clock I've had stable is 1360 but it dropped the score for some reason to around 13500. Temperatures weren't an issue as it never reached over 70c

I also ran 7 other tests at 1350/2100 and averaged a score of 13734.

Current settings - 1.5% frequency bump(1350), 25mv undervolt across the board, 2050 memory speed, fan speed settings of 2600/3900, temperature control set at 80/60 and power limit set at 50%


I'll update this more as I figure out the sweet spot for my setup. I'm hoping to get as close to 14000 as possible, but it may not happen. The temps don't seem like they're an issue and it may very well be a power draw issue.

Anyone else have any ideas on how to get a little more boost from these cards?

Post your results.
post #2 of 433
Prolly updated drivers will give it a bit more boost. But, as it is, your 480 is already as fast if not faster than a stock 390X for sure in this benchmark. For games? That remains to be seen. Just sucks that at its price came a cheap cooler. They did the same with the Hawaiis.

EDIT: With a better cooler like a red mod with AIO combined with bios mod, this card might indeed reach Fury performance. Our bios modders are standing by.biggrin.gif
Edited by rdr09 - 6/30/16 at 8:42pm
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post #3 of 433
Thread Starter 
I'm willing to test it out when/if bios mods become available. Here are my two recent scores with extreme and ultra;

Extreme - http://www.3dmark.com/fs/9053170 - 6175

Ultra - http://www.3dmark.com/fs/9053231 - 3047
post #4 of 433
Do you have the SteamVR Performance test installed? Can you check out if there's a difference after a few runs with 0% and +50% power limit?
post #5 of 433
The more you undervolt does the card get more efficient to the point where its unstable or is there a sweet spot?
post #6 of 433
Undervolting seems like an interesting thing. Every chip can undervolt at stock speeds by a different amount and the only thing that happens apparently is when it reaches the minimum it becomes unstable. If you stop there and return 1-2 steps to make it stable you get to use less power and the chip works just as good with less heat in return.

Seems a win and i feel just uneducated that i haven't done it till now. Gotta read up on it more and undervolt my FX8350 and maybe even OC it a bit to keep it working at the same temperature that it is working now biggrin.gif

All in all it's optimizing the chip voltages as opposed to using stock ones
Edited by slavovid - 7/1/16 at 3:01am
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post #7 of 433
Can you post a screenshot of your Radeon Wattman settings? I'd like to try some undervolt benchmarks and want to be sure I'm doing it right.
post #8 of 433
Quote:
Originally Posted by slavovid View Post

Undervolting seems like an interesting thing. Every chip can undervolt at stock speeds by a different amount and the only thing that happens apparently is when it reaches the minimum it becomes unstable. If you stop there and return 1-2 steps to make it stable you get to use less power and the chip works just as good with less heat in return.

Seems a win and i feel just uneducated that i haven't done it till now. Gotta read up on it more and undervolt my FX8350 and maybe even OC it a bit to keep it working at the same temperature that it is working now biggrin.gif

All in all it's optimizing the chip voltages as opposed to using stock ones

I think the problem with the chip is that the core voltage is too high and the there isn't enough voltage allocated to the other parts on die. The easiest way to resolve this is to undervolt and raise the power limit.
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post #9 of 433
Quote:
Originally Posted by slavovid View Post

Undervolting seems like an interesting thing. Every chip can undervolt at stock speeds by a different amount and the only thing that happens apparently is when it reaches the minimum it becomes unstable. If you stop there and return 1-2 steps to make it stable you get to use less power and the chip works just as good with less heat in return.

Seems a win and i feel just uneducated that i haven't done it till now. Gotta read up on it more and undervolt my FX8350 and maybe even OC it a bit to keep it working at the same temperature that it is working now biggrin.gif

All in all it's optimizing the chip voltages as opposed to using stock ones

I agree. I have two at home (one for me and one for the wife)

The wife won the ASIC rating on GPU-z at ~81%, holding stable at 1300 (1050mV)core clock , 2200 (975mV) memory clock
Mine on the other hand is appently like most 480s at ~62%, holding stable at 1300 (1085mV) core clock, 2200 (975mV) memory clock

Been meaning to push the overclock to see what the max I can get is on my next days off
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post #10 of 433
Quote:
Originally Posted by Iscaria View Post

Can you post a screenshot of your Radeon Wattman settings? I'd like to try some undervolt benchmarks and want to be sure I'm doing it right.

This is a bit of an old one (I am now at 1300 / 2200 but same voltage.

crap I meant to edit the above spot :l
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