Re: AMD Mem Tweak - Read/modify mem timings on the fly

Eliovp, great work on this tool. Here are some of my results:

OS: linux/Ubuntu 18.04
miner: teamredminer 0.4.3
card: Vega 64 air cooled (MSI air boost OC w/ samsung mem)
core clock: ~1150Mhz
mem clock: 1100Mhz
timings modified: --rp 10 --rc 44 --rfc 300 --rrd 3 --rcdrd 12 --rcdwr 5
hashrate w/ stock timings: ~19.5kh/s
hashrate w/ new timings: 21.36kh/s

Unfortunately I don't have power readings from this rig, so I'm not sure how much the power usage increased with the new timings.
I think the card can be pushed more, but I don't have the time to keep tuning at the moment.

Holy OMG !!!!!!
I dont understand the various parameters, but i just followed todxx timings on my vega 64(air cooled/samsung).

Results:
Miner : SRBMiner 1.8.3
Algo : Cryptonight litev7
Clocks : 1408/1107/875 (ODT)
Actual : 1354/1107/850 (HWinfo)

Stock Timing : 4530 h/s
Todxx Timing : 4800 h/s

Thx Eliovp for the tool and todxx for making it way easier.

Will keep posting the magic as i try more algorithms

Is that working stable for anybody?
that rcdwr is very low. GPU crashes in a few minutes for me.

I've continued to tweak todxx's first suggestions. I know he based a lot of his testing on his Vega FE, that's why the --rfc is high compared to stock values for Vega 64, he forgot to dial that down before posting. I'm currently only testing on a Vega 64 LC, might be very capable in terms of handing tightened timings, but yes I'm running 100% stable with those timings.

I'm also stable with the same timings and --rfc 250 which gave me an additional boost. Modified timings would be

Code:

--rp 10 --rc 44 --rfc 250 --rrd 3 --rcdrd 12 --rcdwr 5

I don't want to hijack this thread to talk about specific miner(s), but just this single note since people seem to be keen on running tests: if you run tests with TMR 0.4.3, CN-turtle is really the only variant that fully utilizes the modded timings because it pounds that mem controller like crazy in any setup. You might see improvements in CN/r and other variants, but we will release a new version shortly that has a mode dedicated to running with modded straps. Current tests on my Vega 64 LC hits 2320 h/s CN/r at 1407@900, 1107@900. These settings might not be stable on blower 64s, we'll see. I will continue testing other Vega models that I own over the weekend (Vega 56 ref flashed 64 and Vega 56 Hynix HBM).