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Hawaii Bios Editing ( 290 / 290X / 295X2 / 390 / 390X ) - Page 351

post #3501 of 3542
I'm not sure if anyone has been watching the cryptocurrency mining forums lately, but the wizards at Bitcointalk.org forum have managed to fully decode and tune the memory straps for Ethereum mining on RX and R9 cards.

There's no mention of gaming with these modified memory timings, but there's a chance we could use their hard work to squeeze a little more 3D performance out of our cards. I'm curious what the memory gurus around here can do.
post #3502 of 3542
Ethereum and Zcash are very memory-intensive algorithms. If it works mining those without throwing out invalid shares or crashing I'm sure they would be rock-solid stable in games.
That said games probably benefit way more from core clocks than memory performance whereas with ZEC mining it's the other way around. Still the RX cards might show a significant boost as they only have a 256-bit bus and I believe are limited by memory even in gaming scenarios. For the high 512-bit and 4096-bit high bandwidth mem on Hawaii/Fury probably not so much.
post #3503 of 3542
Quote:
Still the RX cards might show a significant boost as they only have a 256-bit bus and I believe are limited by memory even in gaming scenarios. For the high 512-bit and 4096-bit high bandwidth mem on Hawaii/Fury probably not so much.

Ah, that makes sense why most of the attention over there was focused on the RX cards.

I guess the most we could hope for with tighter timings is a bit lower memory latency since Hawaii has so much bandwidth already. Although it likely would not be much better than just copying a lower strap.

Still, it is interesting stuff, and would be fun to play with for someone with the knowledge and motivation.
post #3504 of 3542
I already have two of my 3 Hawaii cards modded with The Stilt's timings and they definitely perform better in mining at least. The 3rd one I couldn't find any custom straps at the time (but maybe I will in that thread so thanks for that) so I just copied a lower strap to a higher one but it didn't help any. I just get the same performance at lower mem clocks is all but my max mem clock is lower.

EDIT: So I did some maintenance on one of my XFX cards which had a failing fan and thought it might be interesting to someone.

Cleaned the heatsink, the failing fan's bearing, greased the fan bearing, and reapplied the TIM. It's now running at about 10°C cooler than the other XFX and the Gigabyte, with slightly better VRM temps as well (better than the other XFX but still about 10°C higher than the Gigabyte). I took a screenshot after a few minutes of ETH mining for comparison. The one I fixed up is referred to as "XFX Black Ed." in the screenshot and the one I left alone is "XFX Double D.".

I'm surprised it improved that much over the other XFX...but how much of that was due to the TIM reapplication alone, and how much was due to other maintenance I'm not sure.

I think I'll take the other two cards apart and do some maintenance on them as well to see how they improve and update this again.

Also I snapped some pics of the card while I had it apart. You can see that the factory TIM application was not the greatest but it wasn't terrible either. BTW those silver and black pieces that stay attached to the card and touch the thermal pads are actually plastic, not metal, which I thought was weird. I would think the VRAM and mosfets would be better off just being uncovered and getting direct airflow from the fans. The Gigabyte's VRMs stay much cooler than the two XFXs so I think XFX definitely could have done better here.

Sorry for the crappy image quality. My smart phone is not that smart (because that's what desktops are for...phones are for phone calls and texts IMO biggrin.gif). It's a cheap LG Android.






EDIT 2: Update

So I did the same maintenance on the other XFX. It wasn't that dusty and the fans were already working pretty normal, so pretty much just redid the thermal paste on that one. Currently after 20 mins of mining it is at 70°C core and 82°C VRM...so a little worse, and fewer gains than the Black Edition (which is at 66°C core and 79°C VRM after 20 min), but still very much worthwhile.

For reference the Black Edition's VRMs would get up to 90°C and core was ~80°C or so before maintenance IIRC, but like I say it had a bad fan...so those gains weren't just from TIM.

I added in the GPU-Z for the Gigabyte card (which I haven't done any maintenance on yet) and it is at 76°C core and 71°C VRM (so already doing way better than the cleaned up XFXs on the VRM) and it has a fan on the fritz also...so I expect after the maintenance on that it will outperform both the XFX cards on core and VRM temps. We'll see...


Edited by bardacuda - 4/1/17 at 10:11pm
post #3505 of 3542
I know this is sort of off topic for this thread but y'all in here seem to know more about AMD cards than anywhere else so I'm just wondering... The new RX 400 line of cards.. can we still do a custom bios with custom overclocks and custom voltages on the new AMD cards? Are they voltage locked like nvidia, or still "Free and open" to modding like R9 200 and R9 300 ?
post #3506 of 3542
I don't have any personally, but from what I have read you certainly can....although I think there's an issue with trying to downvolt the memory controller voltage. Down/up on the core is fine or up on the memcontroller is also fine. Also you can change dpm states and memory timings and all that good stuff.

http://www.overclock.net/t/1604567/polaris-bios-editing-rx480-rx470-rx460/
post #3507 of 3542
Quote:
Originally Posted by bardacuda View Post

I don't have any personally, but from what I have read you certainly can....although I think there's an issue with trying to downvolt the memory controller voltage. Down/up on the core is fine or up on the memcontroller is also fine. Also you can change dpm states and memory timings and all that good stuff.

http://www.overclock.net/t/1604567/polaris-bios-editing-rx480-rx470-rx460/

Thanks! I don't know how, I guess I totally fail at searching mad.gif Was looking and I couldn't find that thread some how. Anyway I'll just ask my questions over there.
post #3508 of 3542
Hi, I have 11 cards r9 390 gigabyte g1 gaming used for mining. Core voltage is locked. The maps themselves emit a lot of heat and spend a lot of electricity. If you can a mod.
This is the original Bios: https://www.techpowerup.com/vgabios/175728/gigabyte-r9390-8192-150605
Thanks.
post #3509 of 3542
Look in the original post under "GPU Voltage Adjustment"
post #3510 of 3542
I'm afraid not to damage the card. But I will have to try. A voltage how to unlock.
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