Hi,

I'm using 2 Vega 64 with blockchain driver, 1100mhz mem

When launching castxmr everything goes well :

[10:57:53] GPU0 | 55°C | Fan 4646 RPM | 2045.7 H/s
[10:57:53] GPU1 | 53°C | Fan 4743 RPM | 1997.0 H/s
[10:57:58] GPU0 | 54°C | Fan 4641 RPM | 2043.3 H/s
[10:57:58] GPU1 | 58°C | Fan 4741 RPM | 1998.3 H/s
[10:57:59] GPU1 Found Nonce, submitting...
[10:57:59] Share Accepted -> +1
[10:57:59] Shares: 16 Accepted, 0 Errors | Hash Rate Avg: 4014.7 H/s | Avg Search Time: 17.3 sec

And after few minutes it drops :

[11:06:15] GPU0 | 55°C | Fan 4654 RPM | 1863.8 H/s
[11:06:15] GPU1 | 58°C | Fan 4742 RPM | 1850.3 H/s
[11:06:19] GPU0 | 55°C | Fan 4655 RPM | 1860.9 H/s
[11:06:31] GPU1 | 58°C | Fan 4745 RPM | 1653.1 H/s
[11:06:31] GPU0 | 55°C | Fan 4649 RPM | 1867.0 H/s
[11:06:31] GPU1 | 58°C | Fan 4742 RPM | 1894.3 H/s
[11:06:31] GPU1 Found Nonce, submitting...
[11:06:31] Share Accepted -> +1
[11:06:31] Shares: 28 Accepted, 0 Errors | Hash Rate Avg: 3868.7 H/s | Avg Search Time: 28.1 sec

Temperature is ok, I tried to give +50% (higher hashrate but still at 1800) , -30% (1600~) to power limit,

Someone experiencing same problem ?

4x vega 56

mine avging 165w with -30 power - combined hash rate 7099
180w power at 0 - 7600

I followed the guide on reddit, wondering if voltage  control not working properly?

wattman showing 905 core/ 900mem - i just flashed the video bios and used the 1000 reg file on each gpu.

As others have mentioned, be mindful of your temps. HBM is pretty sensitive. If you're seeing it on both cast and xmr-stak, it could very well be hbm getting too hot

I have an issue when comparing hash rates reported from cast-xmr and the hashrates I see at the pool (supportxmr).


My benchmark rig is made of 4xVega56 flashed to 64 cards.

The hashrates for the rig shown by cast-xmr are 7870h/s, constant (i.e. no drops or anything). It's very stable within 40h/s.

However, the real hash rate reported by the pool (supportxmr) are lower than expected. I get 7250h/s. This is about 7.8% lower than reported by cast.

If we take into account:

-) 1.5% dev fee: 118,05 h/s
-) Rejected errors from old jobs (2%): 155 h/s

The total is 273h/s or 3.4%

I'm missing a total of 620H/s (7.8%!). That is another 347h/s  4.4% and is a relevant number.

I have no errors or disconnects. I've been chatting with the maintainers of supportxmr and they sustain that the 24hr period shall fall within 0.1-0.2% of the expected hash rate but mostly never beyond 1%. We're talking 4.4% here.

I'd like to ask if anybody is experiencing something similar, or do your real hash rates (from pools) actually match the reported cast-xmr rates?

thanks.

Is nobody using the new higher maximum speed for HBM2 on vega which is 1200 mhz.   I was wondering which protocol likes this most of all.   Doesnt seem this requires much more voltage to achieve and Ive read the timings are not looser to enable it either so it should help somewhere.
Use 1999 mhz not 1200 if you test or even 1170

Is your 24-hour average at the pool consistently lower every day? I get much higher variance than 1% - but it goes both ways, and my average over several days is my hashrate -4.5-5%. I think that's normal - there may be other issues (little things, like the time to switch to mine the devfee, time to switch jobs, add up to something I assume) that make your miners' hashrate appear higher than normal. I don't know if the hashrate reported by the miner is an estimate or not, or whether it counts valid and invalid hashes.

Also, don't forget downtime. Even 15 minutes shaves off over 1%.

Yes, I factor uptime when making calculations.

My hashrate is consistently lower than what it should be. It's never higher over a 24h period (it's higher over shorter periods like 1h, but also much lower sometimes).

24hr is long enough to even out luck. This has been my experience with other miners (stak).

Pool switching shall not be a major factor. It takes few ms each time unless there's a major issue on the switching code.

It would be interesting to know if it's the same on other pools or if it's only on supportxmr.

Average Hashrate for last 6 hours 3,914.1 H/s - 2 vegas 56 with 64 bios - same like on my miner .  current jump all the time , from 2900 up to 4900 ...

when it crashes is it a mission to get windows to see the gpus again, or use them again i mean?
ihave 3 gpus and fark me, i get blue screens and stuff,i cant use msi afterburner for some bloody reason
and once i get a crash i struggle to get windows to see the gpus in a healthy state again
like when i run a miner sgminer claymore whatever  it crashes again,
just want to know your experience