MSI RX470 ARMOR

[vavhab]

Hi Guys,

Here is a very strange problem.
I have a bunch of MSI RX470 ARMOR 4G cards, I bought them about a year ago, all came with samsung memory.
All works fine hashing 28+Mh/s on ETH+DCR. However fans started to die on couple of cards. So I sent them back to MSI.
Instead of replacing the fan they sent me an another card(serial number is not the same).
Also came with samsung memory, the first thing that I noticed is the different bios.
original one: 113-V34121-F1
replacement one: 113-V34121-X2

So I did the same 1750 strap change in this "X2 bios" as well, however these cards don't want to hash with more than 24Mh/s
I tried the 1500 timing too, no matter what I do, the maximum hashrate that I get is 24Mh/s.
I have 3 cards like this.

What is different on these cards?
Have you seen something like this before?
Any idea?

Thanks in advance,

[baga105]

Flash the cards with your "Faster" bios and check the results. If everything is the same, there should not be a problem.

[vavhab]

Flash the cards with your "Faster" bios and check the results. If everything is the same, there should not be a problem.

This is what I ended up with..
I flashed the old bios on these cards, and I also had to set the power limit to +30% to achieve 28Mh/s.. so these "replacement" cards draws significantly more energy.
Very odd. I don't get what did they change.

[squallw]

I have 6 Rx470 and can run 29mh/s, some ppl can run up to 31mh/s, try to see this topic: https://bitcointalk.org/index.php?topic=1954245.0
good luck