Any good OC setting for ASRock 6900 XT? It looks like is outperformed by a lot of 6800 XT, I hoped for something like 65 Mhs @110w being the chipset faster
Just going off what I’m seeing on the btc talk thread for TBM the releases are a mix of bug fixes and improvements.
That said, no SSL support yet kind of kills it for me. I prefer using SSL if I may.
Probably be best off just sticking with what has worked for so long, TRM, even with the 1.0% fee I guess that buys you ease of use and a known quantity.
I have the asrock 6900xt formula OC, the model with the XTXH core. While I can clock the memory higher than 2150 in windows there is no performance benefit. Hash rate just crashes anyway when pushing up past that limit. Disappointing but GDDR6 is what it is. I really have no idea how they squeeze 2250mhz out of the reference 6900xt liquid cool model that is basically a unicorn at this point.
I get 63.4 MH out of it in windows and it beats every other 6000 card I have running in my hive rigs. Most of my 6800 cards are around 61.8-62.2 MH.
Can’t argue with your logic.
fwiw: I’ll follow the folks that test with 100x my hashrate, measure accepted shares poolside, and could care less about MH/s bragging rights in posts.
Last I checked, we don’t receive rewards for reported MH/s.
1 Like
Thanks for the suggestion. In that case it’s difficult to pick poor performers as each time the poor performer is different, basically meanng all cards are poor performers.
However, what I observed is that when I lower Memory Clock to 1050MHz, all cards start to hash with the same speed. When bumping up to 1055 or 1060, some of them lower the hashrate and become more instable. Therefore now I’m just testing them with 1050MHz memory clock and so far so good for a few hours, what previously was unobtainable. I will keep you posted and let you know the results.
I also flashed a GPU with a reference card’s BIOS - the problem with entering BIOS/boot menu was resolved, as expected. It seems as if Biotar didn’t try hard enough to make their BIOS more compatible with other hardware. (Changing BIOS did not have any effect on hashrate)
Do you think running the SoC 1000MHz@800mV is safe? The lowest voltages I’ve seen on this thread were rather somewhere around 860-870mV.
*At the moment I run 2 out of 3 rigs on the newest kernel and HiveOS version. To this point no difference in hashrate or stability between rigs, however I’ll update if I have new observations.
FWIW. I’ve got a problem with a rig now where it will boot and start mining but it is not able to enter the BIOS. The monitor (displayport) never turns on and detects a signal. The motherboard (asus b550-f) shows a stuck white LED indicating a graphics card problem. I don’t think any of the cards have an issue. I blame the motherboard.
The monitor is plugged into the card that is attached to PCI-E slot 1. That still hasn’t resolved the issue. At this point I don’t care - it works and is operational to mine. Not worth bothering with unless I absolutely have to get into the BIOS at which point I will probably need to disconnect all but one GPU for it to allow me back in.
In my limited experience:
You can’t account for the differences in Kernel, Driver, and F-state variations in the software version you are running on. This includes driver support for your particular motherboard, CPU, LAN, etc.
If your hope is get on an island which finally works for your very narrow group of hardware, continue experimenting across the board, but at some point, I would suggest a Pre-#72(f-state functions began) or >= #83 (current stable) version to focus your efforts.
There is no middle ground as any scripting you attempt will be fighting what is included in the Kernel packaging.
I’d break down to a single GPU in a test rig on the latest stable kernel and repeatably test (1) by (1) if had to establish good vs. bad.
I empathize with the situation, I had to separate some brands out into various rigs to manage their particular issues.
Wishing you good luck and good mining results, soonest.
1 Like
I have 10 6900XT Phantom Gaming to test, not sure the OC formula gives a real advantage for mining because I want max efficency for the money. 63.4 mhs is pretty decent, how about power comsuption?
With all my 6800XT I have about 62.5 mhs @98w, I hoped to do a little better with the 6900XT chipset
Currently in windows I’m seeing 122w power use for the 6900xt forumula OC. 63.4 MH.
Keep in mind though I haven’t experimented with dropping memory or controller voltages. I just have vcore dropped to 625mv right now that’s it.
In theory it should be able to get down to about 110w. We’ll see though. I’m just trying to find the limit on the memory right now and it seems I’m pretty close to that. 2150mhz is about all it will go without hash rate collapse though you can clock it MUCH higher in wattman. This card is apparently unlocked on memory and can be sent much higher, it just doesn’t seem to matter though.
I expected about 120W without tweaking with core voltages, it’s pretty fair considering you’re now testing the memory limits.
Asrock 6800XT has worse memory compared to other brands I tested (MSI - Sapphire), I couldn’t go over @1051, but I hope the 6900XT is equipped with better memory despite looking very similar (same super heavy heatsink). As far as I know higher memory clocks produce higher hashrate but, even more important, lower power consumpion. It’s not rare to be able to reach @1071 memory clock, worked good for me, but yes sometimes you have to lower it because you may lose hashrate if memory is not “lottery” type
I had a phantom D gaming 6900xt at one point and it was a good card. I ended up selling it and going back to my sapphire 6800xt nitro for a while. Then the sapphire went back into the rig and I picked up a formula because I wanted a card with XTXH core chip for desktop/game functions.
After it runs for a while at the current settings I may try one more time to get memory clocked up higher. Then will work on reducing memory and mem controller voltages.
Take a look of my OC previously posted here you can lower A LOT power consumption and even increase your hashrate cos you have many many 6800 XTs
Hope this may helps you
Yes, I’ve seen your post before and tried your settings, however at first my cards weren’t stable at all that settings. Especially, the part that got me really confused was that when applying lower than default VDDCR_SOC the F state was dropping from 1941 to 1551, which I believed to be a bad thing that just made things worse. As I later figured out, the F state on 6800xt doesn’t have to be 1941, and 1551 is perfectly enough. What seems to cause instability of my cards were mainly 2 factors:
- too high memory clock - at 1060/1066/1075 my cards were dropping hashrate (each time different card, each time to a different extend, sometimes even reaching ~12mh/s). When I set them at 1050/1045 eveything seems good so far, the hashrate reamins stable, will be testing if I can go higher step by step soon. I am also testing starting the miner with a little delay, as it looks like the miner starts before all the cards are OC’ed and I suspect this could trigger the cards in some safe mode where it cuts the hashrate, I don’t know.
- faulty risers - these were and still are a huge pain in the ass, because in my case the “faulty” risers were working fine ~80% of the time, sometimes just causing soft lockups (CPU#2 stuck for 22s! error) during HiveOS boot or other problems with initialisation (some page faults), once in a while errors during POST which stopped the rig from booting completely, especially after reboot. However, most often the GPUs were initialised successfully after a long while and were mining for a few hours, then throwing GPU dead errors.
I removed ‘the most suspected’ risers, set safe memory clocks (1045/1050) and the rigs work fine so far, even with near your settings. It looks like this now:
SOC 1000Mhz@880mV
PS fun fuct is that these cards really try to run BIOS in native resolutions, which MSI motherboards do not support, while on an ASUS motherboard the BIOS worked but there was some clipping of the UI here and there.
1 Like
The VDDmax is crashing your rig. I set the Vddmax after the rig is on and running.
Nope, i use Team Red and gminer, both provide 63 MH/s
But your oc settings are too aggressive. I hit 62 with 100watts in software
Secondly, i found that the temperatures of cards are too good … you must be living in Antarctica 
So that is another reason you have very good hash 63+
Have you shared these settings somewhere? I’ve scrolled through this thread and tried many different settings for my gigabyte 6800xt, and have yet to achieve what has been posted by members when using their settings.
I’m happy with my OC settings and I do not agree they are too aggressive
Proper ventilation
Really impressed by the temperatures… Would love to know more about it…