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Author Topic: AMD Mem Tweak XL - Read/modify timings/pp/straps on the fly  (Read 57248 times)
bokiminer
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February 28, 2020, 08:42:45 PM
Last edit: February 29, 2020, 04:01:42 PM by bokiminer
 #1041


No you won't..

Flashing an XT vbios to a non XT card is the only thing that is possible.

The onboard PSP prevents you from doing modifications.

Also, memory timing changes on a Navi are like on an R7, useless.

The only thing that would improve performance (particularly eth mining wise) would be to make it so that you extend your bandwith.
Which means that you would need to change clocks + timings so it remains stable and because the PSP on board even has it's own PPtable, this is yet again not possible.

Well, anything is possible, or almost :p
But at this stage, i doubt anyone has been able to accomplish vbios edits for navi (basically bypass PSP).

Cheers

Hello Eliovp, actually it is possible. I successfully hex edited Sapphire 5700XT Pulse bios and copied straps from 1500+, also changed tRef (that gave me +1MH for ETH). I have used that modified atiflash from that link. No problems at all. And, of course, I used your tool to downvolt gpu and mem  Wink
P.S. I'm not that clever, I used instructions from some russian guys
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February 29, 2020, 02:34:56 PM
 #1042

I confirm this. Unfortunately, the need to constantly flash the BIOS, after which the video card sometimes needs to be restored, significantly slows down the search for optimal timings.

Я пoдтвepждaю этo. К coжaлeнию, нeoбxoдимocть пocтoяннo пpoшивaть биoc, пocлe чeгo видeoкapтy инoгдa нyжнo вoccтaнaвливaть, cyщecтвeннo тopмoзит пoиcк oптимaльныx тaймингoв.
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March 01, 2020, 12:57:19 PM
 #1043

Hello Eliovp, actually it is possible. I successfully hex edited Sapphire 5700XT Pulse bios and copied straps from 1500+, also changed tRef (that gave me +1MH for ETH). I have used that modified atiflash from that link. No problems at all. And, of course, I used your tool to downvolt gpu and mem  Wink
P.S. I'm not that clever, I used instructions from some russian guys

Hey! I also own a 5700 and i flashed a XT bios on it and copied 1500 straps to 2000.
I'm getting 57.3 Mhs out of it, but I saw your post. You said you changed "tRef (that gave me +1MH for ETH)". Where can I find this value in BIOS?
Can you help me? I dont use AMD MEm Tweak XL since I use HiveOS and I need to change that value in the BIOS itself.
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March 01, 2020, 03:15:27 PM
 #1044

Hello Eliovp, actually it is possible....

Hey! I also own a 5700 and i flashed a XT bios on it and copied 1500 straps to 2000.
I'm getting 57.3 Mhs out of it, but I saw your post. You said you changed "tRef (that gave me +1MH for ETH)". Where can I find this value in BIOS?
Can you help me? I dont use AMD MEm Tweak XL since I use HiveOS and I need to change that value in the BIOS itself.

Here you are, this is Micron 1500 Mhz strap (f0490202 in BIOS) example:
Quote
800900007D040000000000006A09000040020000142619133D00170006060002100000000508080 018000000218E06000000010101000101001C1800220B00000A0A0000B4000000B40000008A206C024C0000000A00040A130300011F2A0C00A500000002F 4130FA500000000000000

I changed 220B (tREF 2850) to E02E (tREF 12000)

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March 02, 2020, 12:39:39 PM
 #1045

Hello Eliovp, actually it is possible....

Hey! I also own a 5700 and i flashed a XT bios on it and copied 1500 straps to 2000.
I'm getting 57.3 Mhs out of it, but I saw your post. You said you changed "tRef (that gave me +1MH for ETH)". Where can I find this value in BIOS?
Can you help me? I dont use AMD MEm Tweak XL since I use HiveOS and I need to change that value in the BIOS itself.

Here you are, this is Micron 1500 Mhz strap (f0490202 in BIOS) example:
Quote
800900007D040000000000006A09000040020000142619133D00170006060002100000000508080 018000000218E06000000010101000101001C1800220B00000A0A0000B4000000B40000008A206C024C0000000A00040A130300011F2A0C00A500000002F 4130FA500000000000000

I changed 220B (tREF 2850) to E02E (tREF 12000)




Yeah i know it's possible :p
Already built a bios editor with encoding and decoding of those timings.


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March 02, 2020, 01:34:36 PM
 #1046

Great news. Waiting for an advanced editor! A simple editor is already available.
https://www.igorslab.de/en/red-bios-editor-and-morepowertool-adjust-and-optimize-your-vbios-and-even-more-stable-overclocking-navi-unlimited/2/
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March 02, 2020, 06:22:44 PM
 #1047

Here you are, this is Micron 1500 Mhz strap (f0490202 in BIOS) example:
Quote
800900007D040000000000006A09000040020000142619133D00170006060002100000000508080 018000000218E06000000010101000101001C1800220B00000A0A0000B4000000B40000008A206C024C0000000A00040A130300011F2A0C00A500000002F 4130FA500000000000000

I changed 220B (tREF 2850) to E02E (tREF 12000)

Sadly I only got a bump of 0.15Mhs Sad
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March 03, 2020, 07:04:11 AM
 #1048

Hi Eliovp

Do Amd mem tweaker improves the hash rate on radeon VII?

I tried a little bit and I don't see any difference.

Thanks
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March 04, 2020, 08:04:06 PM
 #1049

Hi, is someone using linux? I was using windows with claymore miner and i decide to start using linux, but straps and rxboost is not working on linux.
Using windows without OC my rx580 can hash with 28+ Mh/s and if i OC my vram i get 32+.
I decide to replicate in linux the mem straps from windows when my gpu is underload, but not too much success if i change REF to 30 i can see a boost but changing RC CL etc no boost or the gpu will give me black screen.
Another strange behavior is when i OC my vram, for some reason when i oc my hash is less, its not about how much i OC the gpu ram , default is 2000mhz if i set 2001mhz is the same effect.
I appreciate any hint.
Thanks
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March 06, 2020, 04:22:46 AM
 #1050

Hi, ElioVP when a releases amdmemtweak Navi Huh
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March 06, 2020, 09:31:15 AM
 #1051

Hi, ElioVP when a releases amdmemtweak Navi Huh

I can only do a release with softpowerplay support.
Registers for the timings are obfuscated by the onboard PSP and so it's not possible to apply the same tricks.

I might release a navi vbios editor with timings decoding/encoding option (as seen in screenshot above).
But with the release of RBE, i'm not hurried :p

Cheers!

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March 06, 2020, 10:07:28 AM
 #1052

I might release a navi vbios editor with timings decoding/encoding option (as seen in screenshot above).

It would be great to start!
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March 06, 2020, 04:48:53 PM
 #1053


Hey! I also own a 5700 and i flashed a XT bios on it and copied 1500 straps to 2000.
I'm getting 57.3 Mhs out of it, but I saw your post. You said you changed "tRef (that gave me +1MH for ETH)". Where can I find this value in BIOS?
Can you help me? I dont use AMD MEm Tweak XL since I use HiveOS and I need to change that value in the BIOS itself.

Can you tell me what memory temperature is on that XT-flashed 5700 when mining ETH ? Is it Sapphire 5700 Pulse ?
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March 06, 2020, 05:17:50 PM
 #1054

REF 5700XT 1300/1770/750mV Tref 65535 55.2Mh tmem = 70-72C.
bokiminer
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March 06, 2020, 06:40:32 PM
 #1055

REF 5700XT 1300/1770/750mV Tref 65535 55.2Mh tmem = 70-72C.
Thanks
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March 06, 2020, 08:02:47 PM
 #1056

Rx 5700 Asus Reference after copying 1500 timing straps I now get 57Mh PheonixMiner Ether on HiveOS with CORE 1375 CoreV 800 MEM915 Miner Reporting 118 watts
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March 07, 2020, 03:13:00 PM
Last edit: March 07, 2020, 07:05:18 PM by deadsix
 #1057

Rx 5700 Asus Reference after copying 1500 timing straps I now get 57Mh PheonixMiner Ether on HiveOS with CORE 1375 CoreV 800 MEM915 Miner Reporting 118 watts

57 is too high, check for errors or bad shares. Theres no point running too high a clock / too tight a strap if you do not end up getting a benefit.
For accurate measurements check poolside stats over 24 hours to get to know if a change (overclock or strap change) had any benefit.

Ethereum/Zcash/Monero Mining Bangalore https://bitcointalk.org/index.php?topic=1703592
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March 07, 2020, 04:53:48 PM
 #1058

Rx 5700 Asus Reference after copying 1500 timing straps I now get 57Mh PheonixMiner Ether on HiveOS with CORE 1375 CoreV 800 MEM915 Miner Reporting 118 watts

57 is too high, check for errors or bad shares. Its not point running too high a clock / too tight a strap if you do not end up getting a benefit.
For accurate measurements check poolside stats over 24 hours to get to know if a change (overclock or strap change) had any benefit.

57 is fine. 3 out of 4 of my cards are doing 59+ stable, confirmed hashrate at pool side.

https://i.imgur.com/mbcOyQF.png
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March 09, 2020, 02:47:04 PM
 #1059

Cheers!

Anyone have results with Radeon VII?
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March 09, 2020, 03:37:59 PM
 #1060

Rx 5700 Asus Reference after copying 1500 timing straps I now get 57Mh PheonixMiner Ether on HiveOS with CORE 1375 CoreV 800 MEM915 Miner Reporting 118 watts

57 is too high, check for errors or bad shares. Its not point running too high a clock / too tight a strap if you do not end up getting a benefit.
For accurate measurements check poolside stats over 24 hours to get to know if a change (overclock or strap change) had any benefit.

57 is fine. 3 out of 4 of my cards are doing 59+ stable, confirmed hashrate at pool side.



What cards do you have? what overclocking and undervolting have you done to achieve that?
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