Surprisingly high Hashrate with R9 380s

[lieutfunaki]

My ethereum GPU miner had been down for 6 months after accidentally bricking an AsRock board while trying to update a bios. I've since purchased a used ASUS b250 mining expert. I spent last weekend installing my old R9 380 cards (because I had them) and fired the thing up to find that I'm getting >49mh/s per card with stock settings. Overclocking today, I'm getting >53mh/s per card.

I figured these would be worthless, but I'm pleasantly surprised. Can anyone explain why card that seem to be reported as getting mh's in the 19 range are getting 50+?

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[ronnieb]

What's the wattage like?

[lieutfunaki]

Wish I could tell you definitively. I can't find my kill-a-watt since my move, just ordered another one.

What I've read is 190-250W and I am running at a 10% reduction. So, maybe 171-225W?

GPU-Z doesn't spit out a total GPU power number (lacking sensors?) but the VDDC power for my R9s is running around 63W on average.

[VasilyS]

It is fake hashrate in miner (it seems to me that it is Phoenix miner). You have to see real hashrate on pool. If you wish to have 29-30 mh/s with your cards you have to use Linux. I have 3 R9 290 with downvolted BIOS, each other gives 28,4 mh/s while Ethereum mining on xubuntu 16.04. There are some problems for old cards (like R9) with AMD drivers in Linux. There is a guide how to solve this problem in Russian here.

[adaseb]

My ethereum GPU miner had been down for 6 months after accidentally bricking an AsRock board while trying to update a bios. I've since purchased a used ASUS b250 mining expert. I spent last weekend installing my old R9 380 cards (because I had them) and fired the thing up to find that I'm getting >49mh/s per card with stock settings. Overclocking today, I'm getting >53mh/s per card.

I figured these would be worthless, but I'm pleasantly surprised. Can anyone explain why card that seem to be reported as getting mh's in the 19 range are getting 50+?

This is a bug actually and most likely its as a result of a badly modded memory strap or just the miner software you are using is having an error reporting the correct speed. I had that GPU back in 2016 and it hashed at 20MH/s or so and was pretty quick back in the day.

Are you getting any hardware errors? If so flash back to stock bios and see what speed you get.

If you have no HW errors then mine for a day and see what average speed you get with your pool, most likely it will be no more than 20MH/s.

[JayDDee]

There's no mention of a change in miner SW. Even just the version or different build
could result in a different hash rate.

Confirming with the pool is important for any miner, especially if it's closed source,
because it's too easy to display any hash rate the coder wants. Even a couple of %
padding will lead to claims about being faster than the competition to get more users.

Any claim of being faster made by an unknown developper is a fraud. It's best for most
people to stick with SW from known devs with good reps.

[lieutfunaki]

I'm using the most recent claymore. Pretty sure it's just an error at this point. No hardware problems. Running for 24 hours shows reported of 314mh/s (5 R9s all over 50mh) and two RX480s each at 20 something. Pool reports closer to 140mh/s.

[sxemini]

I'm using the most recent claymore. Pretty sure it's just an error at this point. No hardware problems. Running for 24 hours shows reported of 314mh/s (5 R9s all over 50mh) and two RX480s each at 20 something. Pool reports closer to 140mh/s.

Only showed in console. Look at pool hashrate. My old R9 380 shows 150mh at the moment in claymore, but on poolside it is 23mh. So it is only a visiual bug not more.

[OasisDre]

My ethereum GPU miner had been down for 6 months after accidentally bricking an AsRock board while trying to update a bios. I've since purchased a used ASUS b250 mining expert. I spent last weekend installing my old R9 380 cards (because I had them) and fired the thing up to find that I'm getting >49mh/s per card with stock settings. Overclocking today, I'm getting >53mh/s per card.

I figured these would be worthless, but I'm pleasantly surprised. Can anyone explain why card that seem to be reported as getting mh's in the 19 range are getting 50+?

If the card is not factory overclocked then I'm sorry to say that the hashrate is not correct, are you getting same hashrate on the pool as well ? I need more information or if possible a screenshot will help

[64dimensions]

Had the same temptation.

Assembled a rig:

H81 MB, 6 ea ASUS Stryx R9 380 4GB cards. About 185 Mh/s @ 900W (Kill-a-Watt P3).

For 900W, cclock 800, mem clock 1500.

This card has I believe a somewhat larger cooler for running warmer and quieter.

I don't recall that this card's bios could be modded.

[OasisDre]

It's fake hashrate, R9 380s aren't good for mining anymore, the highest you will get is around 23mh/s to 24mh/s, it's better to find latest AMD GPU like Vega or Radeon VII

[VasilyS]

I don't recall that this card's bios could be modded.

It is modded with Hawaii Bios Reader and HEX redactor. It gives plus abt 0,5 mh/s. Real good hashrate increase for R9 290/390 you can achieve in Linux with opensourced amdgpu driver. Unfortunately AMD doesn't make good official drivers  for old cards. It is their and Nvidia policy aiming to sell new cards for profit.

[VasilyS]

It's fake hashrate, R9 380s aren't good for mining anymore, the highest you will get is around 23mh/s to 24mh/s, it's better to find latest AMD GPU like Vega or Radeon VII

In Linux you will easy achieve 30 mh/s with these cards.