Do you visualize or simulate your timing parameter changes, or make them and test them live?

God damn it. I have been flashing at least 15+ times trying all values, where the hell is RAS2RAS Jesus god damn it. Each flash takes like 6 minutes, Flash => Restart => Test @ 2000 => Restart => Test @ 2100. On and on for the past 5 days now. Best part is, each HEX string I do it on paper. FUN! Best I have is 800, at 1160, 2120. But then again, based only on if it runs without crashes. Trying to get those ones first and then work backwards to see how it wokrs as I dont think I know which of these timings even matter, or if all do.

Trying to go about it theoretically without knowing how the algo works, is like finding a needle in a haystack,  thats somewhere in the ocean.

I think ETH is more dependant on speed vs timings no? Im sure we can optimize it, but the pay off wont be much I dont think. 1 - 4% gains? XMR is where the money is 20% gains for a good strap.

Got an Elpida 470 4G, best card i've got, does 850h xmr, 30eth, 280zcash without a hickup.

I always thought Hynix would be the better performer but i was wrong. (i'm talking about 470 Hynix, 480's do a shitload better, 850 without a problem..)
And there's a serious difference in Hynix quality.

If you have Elpida's, be glad, they are in my opinion the best ones out there!

Samsung is very decent as well, got my 480 8G's at 800 (can easily do 840-850 as well) core clock 1100, mem 2050 and an undervolt of -120mV vddc.

So in the 80 watt range

Some experimental results.
It seems ~900h/s is a practical limit for Ubuntu 15.04 + fglrx + claymore xmr miner + r9 390 (with H5GC4H24AJR)
at core clock 1135 and any mem clock begining from 1100.
900h/s is relatively easy to obtain with timings tweaking with almost any mem clock starting from 1100,
above 900h/s i had no success.

That's correct,

In other words, run it on windows and you'll most likely get better results..

Greetings!

Got one for that card yeah.

Performance is as you expect it to be.

Awesome 

:p

My custom timings for 470 8GB Nitro+ OC (11256-02-20G) - Samsung mem

For the powersaver guy :
(1126/2100 @ -120mV)




For normal usage guy :
(1300/2100 @ -100mV)

Why do you think that 1300 is much when the def clock is 1266 ?  

Also why not claymore ? Not enough power hungry? Better sgminer ? Why?

Also im running a 5xGPU rig with -120mV for weeks now on ETH (145mhs)...

I checked it now for you:

Idle : 105w from wall
Working : Hash ~ 807 H/s, VDDC : 0.8938 V, 197w from wall