Quote from: chiefoforc on May 14, 2017, 09:59:28 AM

UPDATE2:

finally found out how to deal with Sapphire RX580 8GB with hynix. Its bios are the same as Sapphire with samsung, but how to mod the bios is different.

With samsung, just copy 1:1750 to 1:2000, it is done. easily from 24->31mh/s.
With hynix, you should copy 2:1750 to 2:2000, and tune the clocks, This will make you from 22->28mh/s.

10-15% lower is which I can live with.

Those are just Sapphire , other brand don't have the issue.

The good things with Sapphire is, the temperature is lower even the fans not that fast,and lower watt consumption.

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UPDATE:

conclusion:

If your GPU is Sapphire 580 with Hynix, it sucks.
I bought 3 Sapphire 580 hynix, they are all 22mh/s top.

But XFX RX580 hynix is 24mh/s which means good.
Sapphire RX580 samsung is 24mh/s which means good too.

JUST dont buy Sapphire RX580 with Hynix !!

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Hi all.

My shapphire rx480 with samsung memory got about 27mh/s @80watts with 1000/2250.

My shapphire rx580 with samsung memory got about 27.8mh/s @120watts with 1100/2250.

Seems like rx480 is better not only because the mh/watts but also the price.But 480 are sold out so I have to buy 580 instead.I can live with that.

BUT yesterday I got a RX580 with hynix. No matter how I change the coreclock/memclock, IT ONLY GOT about 21mh/s @85watts.

My Sapphire 480/580 with samsung always do about 27mh/s on ETH or 330 sols/s on ZEC. But this sapphire rx580 with hynix do 21mh/s on ETH or 280 sols/s on ZEC. There are 2pics @ #4th floor show that hynix only got 21mh/s.

Is that regular? i didnt flash bios,only use msi afterburner. Does it means 580 with hynix sucks?what should I do ?

And which brand is better than sapphire? and why is that?

Thx.

These cards can actually hash at 30-31 very easily. You need to mod the bios a bit but nothing out of the ordinary for AMD RX series cards. I have an 8x GPU rig of RX 580 Nitro+ 8GB. Total rig draws just under 1500 Watts and I"m pulling about 244 Mh/s ETH + about 4850 Mh/s SC. It is sort of a lot to type out. I'm going to make a video on it here in the next few days as many people have had issues with these cards including myself. I was new to AMD when I bought these so it was a bit of a learning curve. Now that I am familiar with it I don't mind them. Let me know if you would like to know more and I'll post the video link here.

Brockshad

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