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post #631 of 4670
480Nitro4GB.zip 111k .zip file


Wanting to mod my bios for more stock voltage. But I can only pull at 256kb file instead of the 512kb one the bios edit says I should have.
Could some one also explain how the voltage table works.



Has a stock voltage of 1.12V and need 1.15V for 1400mhz.
post #632 of 4670
Quote:
Originally Posted by aliquis View Post

Hello, i recently purchased a rx 480 too, and although i read through some pages here i still have some questions bugging me.

I noticed that if i clock the memory from 4075mhz in wattman to 4100mhz, the performance actually decreases, at least in the witcher where i tested it.
Is this normal behavior, i read that the memory timings change when you up the memory clock, possibly resulting in a worse overall performance, is this true?
Should i leave the clock at stock or up it a bit (to 4050-4075) as long as i dont get any memory errors (hwinfo)

There seems to be a bug in the drivers since 15.8.1 where sometimes the performance scaling with memory clock increases gets stuck or sometimes the powerlimit. It's not effecting everyone. Performance gets stuck at lower level. For me it happens if I adjust the memory clocks while having hwinfo64 open. Safest for me is to adjust the memory clocks using the 3rd party utility wattmon with vrm monitoring turned off. Uninstalling the drivers, DDU in safe mode. A cold boot and a reinstall gets me out of the issue and the memory clocks work again.

This makes it really difficult for me to find a stable overclock. I have to use benches to see if I'm having the stuck performance. Things will look stable while stuck at particular settings, but those same settings may not be stable when "unstuck." For instance at my oc, Valley extremehd preset is at 59 to 60fps. When the oc sticks it stays about 55 or 56fps. While testing for stable settings I also have to go back to valley to see if I'm having the issue. I found my card was going to need an extra 10mv on the 16.9.2 driver to be stable with my OC of 1435. Rather than go up that high I went down to 1400. My clocks stuck twice finding stable. Makes for a long process.

I'm putting my 2nd reference card in under water next week and redoing my loop to move a rad and my pump/reservoir to the outside back of my case. I always thought I'd drop down to about 1400 when I went with my 2nd card. There's a ~55mv difference for that 35mhz. Safer I think when using two cards.

Read the following thread: http://www.overclock.net/t/1609366/amd-16-8-1-16-8-2-memory-clocks-not-working#post_25455916

edit: link to wattmon: http://www.overclock.net/t/1609782/watttool-a-simple-tool-that-combines-overclocking-with-vrm-monitoring-tweaking-for-rx-400-series
Edited by greytoad - 9/23/16 at 8:29pm
post #633 of 4670
Today i;ve succsesfully flashed the bios with better timings for high-er memory clocks ...it's basically the same thimings from 1500 Mhz strap table...iv'e copied and paste to the columns , for 1750 and 2000 Mhz....not @ 2100 Mhz i got near perfect good results....but
It was since i left the PC working....and then i found out that my copy of windows was deactivated (duo to new update) and the drivers stopped working/reading properly my card, in gpu z was showing Generic microsoft adapter....then...i;ve re-activated the new windows, reinstaled 16.9.2 crimson drivers...and now it is working perfectly fine.

This is what i've done in PolarisBiosEditor the Memory timings table...
777000000000000022339D00CE516A3D9055111230CB4409004AE600740114206A8900A002003120150F292F94273116 - 2000 mhz
777000000000000022339D00CE516A3D9055111230CB4409004AE600740114206A8900A002003120150F292F94273116 - 1750 mhz
777000000000000022339D00CE516A3D9055111230CB4409004AE600740114206A8900A002003120150F292F94273116 - 1625 Mhz
777000000000000022339D00CE516A3D9055111230CB4409004AE600740114206A8900A002003120150F292F94273116 - 1500 Mhz
the others i leave them like they were
777000000000000022339D00CE516A3B805511112FCBD408004AE6006C0014206A8900A002003120150F272D8D263015 - 1425 Mhz
etc...
555000000000000022DD1C0084941212F0540B0795847102002041001B0414209A8800A00000312006050D0E270F160E - 400 Mhz

- If someone have a better idea for better timings, please do post......i need to try timings with 555...like for the 400 Mhz Strap....thank you in advanced


@bmgjet

Quote:
Originally Posted by bmgjet View Post

480Nitro4GB.zip 111k .zip file


Wanting to mod my bios for more stock voltage. But I can only pull at 256kb file instead of the 512kb one the bios edit says I should have.
Could some one also explain how the voltage table works.



Has a stock voltage of 1.12V and need 1.15V for 1400mhz.

Save your bios with AtiWinFlash , you will get the proper 512kb size....then you can edit the VRM voltage in PolarisBiosEditor , there is a section Memory and colums for Mhz and Voltage....you can put whatever voltage you want, this Hynix memory are rated 1.5v to 3000 Mhz.....there is another revision 2500 Mhz ...but i do think that both of them can manage 3000 Mhz @ 1.5v ...this are exelent memory binned chips from Hynix, true hign end stufff....also the chips for the Core are Binned, true high end chips that can manage 1500 Mhz and above....but...i do think the engeneering is poorly done with this GPU....if there was another 8 pin PCIe connector, it could have been direct competitor to gtx 1070 , even gtx 1080 for that matter....but....with single 8 pin PCIe connector we are Power limited.
I will do it for you, just give me time i have a deadline project that i'm currently working on...this stuff it is litteraly 5 minutes of my time...but, can not risk it, couse i'm on a tight deadline i know i will play then with my toys also for hours....i just can't get enough of playing with GPU's
post #634 of 4670
atiwinflash is older, and only sees my 370 2gb card (my folding card)

and it saves it as 256kb

the newest version that is renamed atiflash sees and saves both my rx480 and r7 370 each @ 256kb BIOS save as well.
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post #635 of 4670
Thread Starter 
777000000000000022CC1C00106A6D4DD0571016B90D060C006AE70014051420FA8900A0030000001E123A46DB354019

1750/2000Mhz Mix Timing. 0 EDC errors @2100Mhz(950mv)

+ 6-7 GB/s (OclMemBench)

777000000000000022CC1C00CE616C47D0570F15B48C250B006AE7000B031420FA8900A0030000001E123A46DB354019

1625/2000Mhz Mix Timing. 0 EDC errors @2100Mhz(950mv)

+ 10-12 GB/s (OclMemBench)
Edited by generaleramon - 9/25/16 at 10:09am
post #636 of 4670
Do we still need to bypass BIOS check for flashing?
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post #637 of 4670
Thread Starter 
Quote:
Originally Posted by TheLAWNOOB View Post

Do we still need to bypass BIOS check for flashing?
No in 16.9.1+ drivers
post #638 of 4670
Please help , stress memory are sewn but no change in Wattman and WattTool not used, always 1000mv even if in the BIOS 960 mv and a dump of the BIOS removed from my values . I re-installed the driver and restarted the computer it does not help .

mV123.png 170k .png file
post #639 of 4670
Quote:
Originally Posted by generaleramon View Post

Quote:
Originally Posted by TheLAWNOOB View Post

Do we still need to bypass BIOS check for flashing?
No in 16.9.1+ drivers

Thanks, I might start to flash my 480s and 470s if I get some free time. Windows 10 updates keep resetting my wattman settings.

Undervolting 10 cards 1 at a time everytime Windows updates is starting to piss me off.
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post #640 of 4670
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232GB/s @2125MHz No Errors
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