Bitcoin Forum

Hi community!

Let's share our configs about this graphic card, so maybe together we can increase our hashrate:

Sapphire RX 6800 Pulse
662 mV CORE
1250 Mhz CORE
2110 Mhz VRAM
21.2.3 DRIVERS
120W

62.8xx MH/s

how  exactly did you lower vcore to 662mV?

From RedTeamMiner documentation:

To be able to lower voltage properly, you need to modify the powerplay table
   with e.g. MorePowerTool. Install GPU-Z and MorePowerTool. Save the bios using
   GPU-Z. Open MorePowerTool, select your Big Navi gpu in the dropdown list. If
   necessary, load the bios to get a baseline configuration. Lower the "Power
   and Voltage" -> "Minimum Voltage GFX (mV)" limit to the voltage you with to
   run. Lower than 625mV is rarely stable, although we've been able to run at 612mV.

Then you Save, Restart Windows and you will see the new minimal core mV to the number you choosed.

Probably you have a Samsung memory, because only it allows you to underestimate the values so much.
Typically Core Undervolt is chosen from the 700-800 range, but you're in luck.
I have no other suggestions for setting up a video card. If problems arise in the future, then Core Undervolt will have to be increased to 700

Team red miner:

Navi21 (6800/6800XT/6900XT)
===========================
TRM v0.8.1 added basic support for Big Navi cards (Navi21). This section will
be expanded as we do more work for this gpu generation. For now, the suggested
tuning process is quite simple:

1) Big Navis should run in A-mode (it's chosen by default). While the B-mode is
   available, the value of the 128MB cache is degraded with a larger memory
   footprint.

2) Windows is preferred over linux for now since you can choose the "fast timings"
   under win which adds 1.0-1.5 MH/s. Testing was made on Adrenalin 20.12.1.
   The AMD recommended driver (20.11.3) had bugs for handling clocks on our 6800.

3) To be able to lower voltage properly, you need to modify the powerplay table
   with e.g. MorePowerTool. Install GPU-Z and MorePowerTool. Save the bios using
   GPU-Z. Open MorePowerTool, select your Big Navi gpu in the dropdown list. If
   necessary, load the bios to get a baseline configuration. Lower the "Power
   and Voltage" -> "Minimum Voltage GFX (mV)" limit to the voltage you with to
   run. Lower than 625mV is rarely stable, although we've been able to run at 612mV.

   NOTE FOR 6800 USERS:
   6800 users might also want to increase the SOC TDC limit in the same tab. It
   was 30A for our test 6800 which caused throttling. Increase it to 32 or 33A.
   Before doing so, you should verify in HWiNFO64 that you're really being
   throttled though by checking the "GPU SOC TDC Limit" row. If it hits 100%,
   you need to increase the power limit.

3) Clocks suggestions as starting point for further tuning (Windows with "Fast
   Timing" selected, Linux can choose similar but will se lower hashrates):

   6800:   1235 MHz core, 2124 MHz mem, 625 mV, SOC TDC +10% -> 62.6-62.7 MH/s.
   6900XT: 1200 MHz code, 2138 MHz mem, 650 mV, 63.2 MH/s


Happy mining!

-------------------------------------------------------------------------------------------------

 Videos of the undervolt can be found in youtube

Greetings, I have ASUS TUF Gaming Radeon RX 6800 OC (Micron Memory) graphics cards. And they do not exceed 64,240 MH/s

I thought they would reach a minimum of 85,000 MH/s; So it's time to wait for the great Geniuses to act to see if they can improve this.

-Windows 10 Pro
-Memory RAM 16 GB PC
-All Cards have the same configuration with: Afterburner 4.6.3
-Core voltage 850 (mV)
-Power limit 0
-Core Clock 1200
-2150 memory clock
-Fan speed 50%
-----------------------------------
50C to 52C. 126W to 127W
-----------------------------------
Excuse my bad English :-)

short answer is no , wait for their crypto mining GPU that uses same mem as Radeon Vii

hmm, ok, but power slider in Radeon Software dont work as I want. I did try to set Minimum Voltage GFX to 625mV and it was around there, but I could not raise it to 700mV with that slider in software.

XFX merc 319 Black RX 6800 XT
700 mV CORE (688mV)
1150 Mhz CORE
2090 Mhz VRAM
21.2.3 DRIVERS
128W

61.6xx MH/s

Power limit is also buged. If I go over 15, max freq drop to 500Mhz.

Can anybody tell me which version of AMD Windows drivers are recommended for 6800?
The info is so confusing about it.

63.5 mh/s is rock solid with TRM 0.8.1 under Windows using max possible mem oc and fast timings preset in Radeon Settings.
97 watt by sensor now.
I was able to achieve 89 watt by lowering soc voltage and gpu voltage further but it leads to sudden BSODs ((

See my current stable config in detailed screenshot: (it is XFX merc 319 RX 6800)
https://i.imgur.com/Sr1gvb0.png

Just use latest ones.

Never heard about Micron GDDR6 on Big Navi, only Samsung. Can you post proof?

https://imgur.com/igI2RMH


I hadn't seen it either. Well do you think there is a bug in the GPU-Z Software. ??
Do you think any Genius can make this GPU increase in MH/s and make it stable?

Well. it is interesting. Mine is shown as samsung in gpu-z. Can you try HWinfo for example?
As for increase of hashrate we need to overcome memory OC limit and need more timings mods (which are now locked  >:( )

I tried another config from last hour and is worrking good:

Old drivers uninstalled with DDU (I was using 20.2.2 or something, can't remember really)

Sapphire RX6800 Pulse, Samsung mem.

681 mV CORE
1200 Mhz CORE (1192 real)
2150 Mhz VRAM (2138 real)
21.2.3 DRIVERS
125W
63,8 MH/s
1 stale last hour.

With this command line: PhoenixMiner.exe -pool us1.ethermine.org:4444 -wal xxxxx -proto 3 -rmode 2 -mt 1 -mi 13

My new 6800:

1235 core
650   vcore
2128  Mem + Fast timing
No "SAM" activated from bios (the 2 options are disabled)

62.45 Mhash
Team Red Miner (lie less compared with phoenix miner)

AMD 21.3.1 - 10 March 2021

Edit:

SAM activated now, doesnt make any difference I guess, but for gaming (sometimes I play) it does

Okay, Im testing now 2150mhz the memory
To set it its not easy, you have o change many times to the other standar options, then set all again, or the driver will be missed just changing the memory from tour current mhz, to the higher mhz
63.05 Mhash Team Red Miner, for sure is much more in phoenix miner, but not true at all, I mean phoenix miner lies.

And which miner is working better for you?

never mind, I went back to 2128, 2150 is randomly stable, and all the time I wasted testing, doesnt worth the 0.4 mhash extra or 0.6
Anyway, Im using team red miner, but I have some troubles posted in team red miner discord, but no one answered it.

In hiveon pool
my 5600 xt usually do 2900 shares at 43.1 Mhash or less or more displayed, but 2900 shares.
But my 6800 get 3800-4000 shares at 62.2

So if:
2900 shares = 43 Mhash
4000 Shares = 59.3 Mhash

And 4000 its the best I saw, right now its 3900

For some reason Im loosing shares at 62.1-62.3 Mhash (with --eth_config=A776 when I have to use my pc), 62.4-62.7 when Im not using the pc and --eth_config=A800.

https://i.postimg.cc/0250DTD6/2021-03-30-13-21.png

The result can be better when Im not using my pc with the 6800, but still far from what it should be

EDIT: After hours of farming, like 12 hours or more, not closing Team red miner, the shares get increased.

Edit 2: after many days, and because I play sometimes, today I had to do a clean install of the drivers, even at 1235 core and 2124 memory it didnt want to work, and always crash. After driver re install with a complete clean, is working fine again at 1236, 650v, 2128 mem

Edit 3: this is the best I can do I guess:
https://i.postimg.cc/x147gRbC/6800-mining.png

Can you tell me all the things you do?
MPT config modified
AMD cooling speeds, core speed, mem speed
And if the 6800 is used for the desktop graphics

NOTE FOR 6800 USERS:
   6800 users might also want to increase the SOC TDC limit in the same tab. It
   was 30A for our test 6800 which caused throttling. Increase it to 32 or 33A.
   Before doing so, you should verify in HWiNFO64 that you're really being
   throttled though by checking the "GPU SOC TDC Limit" row. If it hits 100%,
   you need to increase the power limit.


I did not read this previously and yeah, nice! My 6800 AND 6700xt are both hashing a bit harder. The 6700xt now hits 48.x which isn't a ton more but I'll take it.

I'm using phoenix miner still and see no need to change, even if the hash rate numbers aren't calculated as truthfully.

I find windows, the installing of drivers and the offsets in the drivers after applying the voltage mods to be rather annoying and very Polaris like in 2017.

Still they hash and I got them for a solid price.

Anyone figure out why multiple instances sometimes occur? Drives me insane.

ITs a visual bug

sorry for asking here, any difference between 6800 and 6800xt for mining?

 Not sure, maybe 1-1.5 Mhass, but never saw more.

So there is no point to spend more and get the XT, even if you are able to find anything at all.

for mining no, but is the price is just 5% more, well, buy the 6800xt if you can

Hi, I am thinking of flashing BIOS to use less power when mining but unsure if this is a good idea.
I use pc for gaming sometimes will this cause issues? Tried googling for video on how to do it but no luck
So far I have downloaded GPU-Z. I see I have Samsung memory which is good?
Card is Sapphire Nitro 6800 XT SE
https://i.postimg.cc/ZqDDxjFJ/Sapphire-Nitro-SE.jpg
Currently running 1503 core, 2130 mem, 980mv but it says 881mv, 172w, 54-55c
Get 64mh/s average speed, pool speed can vary from 55-67mh/s thou

Normally mine at least 18hrs a day on this pc and powers very expensive here so if I can get 45w less power use might be worth it.
From reading through RED BIOS EDITOR guide I would have to restart my pc each time I want to swap is this correct?

 There is no way to flash a modified bios for all the 6000 series.
 The best way is use more power tool to lower the voltage by software.

Up!

Mining with no errors or crashes with 5.6d

AMD decided to optimize the 6xxx series for gamers, so these video cards became worse.
Until the craftsmen come up with solutions to change the BIOS of this video card, they will have to mine with the hashrates that all reviewers are now showing.
Unfortunately, there are no other ways.