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Polaris Bios Editing ( RX5xx / RX4xx ) - Page 127

post #1261 of 3302
I've modified the performance bios and removed the +25mv offset. Everything else is stock.

bios: Sapphire Nitro + OC (1342mhz) 8GB, stock bios, removed offset.


480NitroOC_No_Offset.zip 109k .zip file

Hope this can help some

Cheers

Edit: Forgot to mention, the Nitro also has LLC enabled, so this will create the extra boost you are encountering. You could try disabling it, but if it came with it on, I'd recommend you leave it there, and adjust your voltage accordingly.
Edited by jeb101 - 2/6/17 at 12:16pm
post #1262 of 3302
Quote:
Originally Posted by jeb101 View Post

I've modified the performance bios and removed the +25mv offset. Everything else is stock.

bios: Sapphire Nitro + OC (1342mhz) 8GB, stock bios, removed offset.


480NitroOC_No_Offset.zip 109k .zip file

Hope this can help some

Cheers

Edit: Forgot to mention, the Nitro also has LLC enabled, so this will create the extra boost you are encountering. You could try disabling it, but if it came with it on, I'd recommend you leave it there, and adjust your voltage accordingly.

Thanks, I used this somehow dropped the max vddc to 1.150 but I was getting lots of memory error using same voltage and frequency I was using on original performance bios.

right now my vddc max goes up to 1.175 and memories are on 1750 timing, so far pretty stable, I need to test it more!



//
I have one more question/request. Is there any way I can make the fans run all the time on specific rpm?
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post #1263 of 3302
Quote:
Originally Posted by akroma View Post


I see your ram is overclocked. I find that polaris does not put up with ram overclocking at all... Even if the ram has a copper heatsink like I modded for mine. I added copper heatsinks to the Core/ Ram VRM and Memory modules among a Core VRM backplate. All of which didn't help much as far as achieving more overclocking stability. This RX 460 is real hot. Hot as far as VRM goes. It needs a 1/4" to 1/2 thick solid piece of copper on the core VRM to improve it's performance. Since when the VRM gets hot, the 48W tdp quadrouples because of thermal loss... As heat rises, resistance by power increases and subsequentially increases power consumption just because of the heat the VRM puts off. The heat sinks only helped aid stock bios settings...

So my suggestion is to stick with 16.9.2 and run stock memory clock at 2000Mhz on stock 2000Mhz timing strap.

You can then have the freedom of overclocking the core. At least for me on the RX 460 4GB, not much is possible... These Polaris VRM's cook even at stock power limit/ voltage.

You may consider defining the boost clocks via Polaris Bios Editor... Probably the last 4 clocks. Starting 4 down from DPM 7 at 1250mhz, then 1266mhz, then 1288mhz, finally 1313mhz. That's a solid 42GPixel/s & 189GTexel/s with 256GB/s ram. Remain all DPM at their respective 65285, 65286, 65287, 65288 for stability. Remain stock power limits. Set all hot spot and max temps among shut down temps at 88C include fan max at 88C. This will prove to provide continuous stability while scaling clock according to load.

LMK bro biggrin.gif

Send your bios .rom to me and I'll dial it in for ya. GPU-Z BIOS Dump.
Edited by chris89 - 2/6/17 at 5:54pm
post #1264 of 3302
Quote:
Originally Posted by SAMiN View Post

Thanks, I used this somehow dropped the max vddc to 1.150 but I was getting lots of memory error using same voltage and frequency I was using on original performance bios.

right now my vddc max goes up to 1.175 and memories are on 1750 timing, so far pretty stable, I need to test it more!



//
I have one more question/request. Is there any way I can make the fans run all the time on specific rpm?

Ram errors can be a little tricky, this mod shouldn't affect your memory at all, as it's just for the core voltage. How many errors are you getting on a Heaven / Firestrike run? Usually if you are under 200 for a run, you've pretty much capped out your memory. If you run thousands / millions / billions, then you're way over what your memory can handle. I'd also reduce your memory voltage to 1000mv again, I actually found better results with a lower value than a higher value. Also remember that you can not set your minimum voltage for memory below your GPU voltage (lowest).
post #1265 of 3302
Thanks for this new bios without the offset, it feels the gpu is more stable at high temps.

Btw, it seems vddci in the bios doesn't do anything. Since I overclock the monitor, gpu memory stays at full always, 2000MHz. But gpu core minimum doesn't go below 1.0V, and since vddci cannot go lower than vddc, it means 1000mV for memory is what it is been set, regardless of what I put in the bios.
This is also confirmed when using WattTool. When I set a lower or higher value, core voltage changes to that when at minimum.
post #1266 of 3302
Hi guys!

Quick question.

Does modding the bios make the card NOT UEFI compatible?
I get black screen until Windows, works fine otherwise.

Thanks
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post #1267 of 3302
Yes, unless you use custom UEFI/GOP, posted info several pages back.
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post #1268 of 3302
@Grenseal I think you just need to turn off Secure boot and it will display a screen through post and into windows... Maybe the bios mod does disable UEFI...

I used to get ram error's on RX 460 but I'm running the ram at 1888Mhz from 1750Mhz...

Left TDP Limits all Stock & Using 1313MHZ @ 1188MV and it works amazingly well.

Polaris BIOS Editor is tricky as far as what you can adjust, I learned you can adjust all the max Temps to 88C but changing fan stuff is tricky.

It's not a good idea to alter TDP at least on RX 460 if you want it to never crash... It scales fine up to 1,313Mhz on stock tdp with 1188mv. It also reports higher voltage as it should on 16.9.2.

I know I get better thermal fan response with 0 Sensitivty on the fan... Before with the 4850 value or whatever the fan would stay off all the time and ignore everything.

With Sensitivty at 0, it actually abides by the fan speed/ temps and I left those stock except adjusted them a tiny bit. It's quiet under load and runs really good, the RX 460 is a great card once Modded with Copper/ Unlocked/ & BIOS Modded...

post #1269 of 3302
Quote:
Originally Posted by gupsterg View Post

Yes, unless you use custom UEFI/GOP, posted info several pages back.
Quote:
Originally Posted by chris89 View Post

@Grenseal I think you just need to turn off Secure boot and it will display a screen through post and into windows... Maybe the bios mod does disable UEFI...

I used to get ram error's on RX 460 but I'm running the ram at 1888Mhz from 1750Mhz...

Left TDP Limits all Stock & Using 1313MHZ @ 1188MV and it works amazingly well.

Polaris BIOS Editor is tricky as far as what you can adjust, I learned you can adjust all the max Temps to 88C but changing fan stuff is tricky.

It's not a good idea to alter TDP at least on RX 460 if you want it to never crash... It scales fine up to 1,313Mhz on stock tdp with 1188mv. It also reports higher voltage as it should on 16.9.2.

I know I get better thermal fan response with 0 Sensitivty on the fan... Before with the 4850 value or whatever the fan would stay off all the time and ignore everything.

With Sensitivty at 0, it actually abides by the fan speed/ temps and I left those stock except adjusted them a tiny bit. It's quiet under load and runs really good, the RX 460 is a great card once Modded with Copper/ Unlocked/ & BIOS Modded...


Thx
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post #1270 of 3302
@Grenseal Your welcome.

This is how I have mine setup which works absolutely great. Some things you can't change without it going haywire. I also notice not much from TDP increase so best leave it default. Check out this screenshot. With RX 480 leave 2000Mhz ram max. With 1313Mhz @ 1188MV on RX 480 is still a really great 42GPixel/ 189GTexel and will never ever crash at these BIOS Settings. I find 100% just plain too loud and it doesn't need to go beyond 75% HIGH/MAX.

However if your a itching for more speed I think you can do it no problem on RX 480 Reference or Nitro Sapphire RX 480.

See 1188mv is 0.9047 % of 1313Mhz... 1188 Divided by 1313 = 0.90479 Rounded up.

So for RX 480 at the below Speeds... We need 1256.75mv Round up to 1257mv... For 1389Mhz.

44.44GPixel & 200GTexel which is flipping unreal and I'm sure you can do it...


Now I'm ITCHING for more SPEED hahaha I'm going to try it on the RX 460 biggrin.gif Oh wait, I don't think I can do it... I'll try ANYWAY haha

Having the fan start early at 40C and 45C keeps the VRM temps in line. Since they are about 40% hotter than the core temp. I load out around 60C Pretty much silent.


Edited by chris89 - 2/9/17 at 12:05pm
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