Quote from: jimmypt on January 26, 2018, 03:26:00 PM

Quote from: xeridea on January 26, 2018, 03:00:39 PM

Quote from: jimmypt on January 26, 2018, 02:55:31 PM

hi everybody,

I just join the mining community. I have 2 RX 480 8GDDR5 (1 Asus and 1 MSI) but the problem is that with one of them I reach 25Mh/s and with the other one only 18Mh/s.

Why is this happen? Anyone can help me with that issue?

thx a lot

Use GPU-Z to check memory vendor. I assume the Asus one probably has Samsung, MSI one probably Hynix. You can bios mod to get better speed by using better memory timings. Most cards should hit at least 27-28MH with custom timings, or at least 26MH with simple memory strap copy and a bit of OC. Use HwInfo64 to check memory errors.

As far as memory quality goes, Hynix < Elpida < Samsung.

Both of them have Samsung memory.

For what I see here I think everything is almost the same.

Do you now any good "How to bios update for dummies" tutorial that I can follow?

Without bios mod, going above stock generally makes use of looser timings, which may cause mining to be slower than stock, perhaps the slower miner has this issue.

Just search youtube for polaris bios mod.

In my experience, without pushing clock to high, I can get
~28MH Hynix (~1950 MHz) custom strap
~29MH Elpida (~2000 Mhz) Custom strap
~30MHz Samsung (2030MHz) Ubermix 2.3

Basically use atiflash to pull bios, edit with polarisbioseditor, flash card, run ati pixel clock patcher to remove driver gpu bios check, restart.

Links and timings here.
http://www.overclock.net/forum/67-amd-ati/1604567-polaris-bios-editing-rx5xx-rx4xx.html

Make sure to check mem errors HwInfo64