Bitcoin Forum

Hi all,

is there any Database for Downloading some already tweaked BIOS'es ?
alternativly is the a noob guide how to tweak bios for mining best?
I am not yet very firm in tweaking it myself.

brgds
mcc

I've made guide for that: https://bitcointalk.org/index.php?topic=1954245.0
You can search this forum or others there will be lot's of bioses, true database is probably only Anorak's one. But he just copy 1500 or 1750MHz straps.

ok, thank you.

i have a 4gb rx480 sapphire nitro+ oc hynix (stock 20-21mh)

at first i have copied 1500 straps to above.
with this i get already 25mh.
after it i set clock to 1250 and mem to 1950 and get 27.5mh

are there some additional tweak which get me nearly to 30mh?

begin at 1930 mem speed i got memory errors, so have to go back to 1900 without undervoltage.
result: 27.1mh

This is a good 1750 MHz strap for Sapphire Nitro+ RX580 8GB cards with Hynix memory from BuriedOne on Youtube.


https://www.youtube.com/watch?v=uiPCwJV_ryM

I copied it over the 2:1750, 2:2000 and 2:2250 timings on a Sapphire Nitro+ RX 580 8GB Special Edition (blue faceplate) and get ~29.25 MH/s ETH + 935 MH/s DCR with a core clock 1120 MHz, memory clock 2200 MHz, -96 mV undervolt and power limit -15% in Afterburner. Runs stable with no memory errors.

BuriedOne ;D and his bios mods are even better than Anoraks  ;D ;D ;D
He wrote me e-mail regarding info about bios modding for his video, but of course he want it for free, he says he's doing it for free, but his website is full of referral links and probably ads even on youtube (I use ABP)? His tips for HW are also the best ;D

thank you, can i also test it for a rx480 4gb ?

That strap is only for Sapphire Nitro+ RX 580 8GB cards with Hynix memory. The 8GB cards have an extra 2250 MHz timing strap compared to the the 4GB cards and I doubt it would work. Other card manufacturer brands use different timings as well, so I don't think it would work either.

Turns out that Hynix strap from BuriedOne is the same one bundled with the new version 1.6 of PBE. LOL. The latest version of Polaris Bios Editor v1.6 from jaschaknack makes it simple to apply the right performance timings for your card. With the 'One click timing patch' option it will apply the bundled performance strap to the correct timings. I tried it with several brands of RX 570/580with Hynix, Elpidia and Samsung memory and they all now get 29 M/s+ stable. Much better than randomly copying timings from the diffrent straps. Some cards like the Sapphire Nitro+ have two diffrent sets of straps from diffrent brands of memory and PBE will corretly detect and apply the right strap to the right timing. Great update!

https://github.com/jaschaknack/PolarisBiosEditor

thank you, really nice tool ... but on my shitty rx480 nitrco+ oc 4GB my own rom is much more stable under same conditions.
but will try it on other cards as well.

Yeah I like those names, "Good Elpida timing" :D Only true name has Uber-Mix :D But there are Hynix and Samsung memories that they aren't supported. Also it won't work with every card, those timing strap aren't the best, beware mostly with Hynix. 8GB Hynix can do much more with better timing.