Topic: Custom RAM Timings for GPU's with GDDR5 - DOWNLOAD LINKS - UPDATED - page 15. (Read 155645 times)

Okay.... I found the issue.

It was the drivers.

The way, you, Roland were doing things were entirely different.

By default, the RX *70 and *80 cards maximum Raw Intensity is 512 at -w 4 and 2 threads.

BUT, the Compute mode (BlockChain driver), is the thing that helps with overcoming this issue.

I tested today with 17.12.11 with Gaming mode, Compute mode, the mentioned strap, and sgminer configs of 512/4/2 and 896/8/2.

Results were as follow:
235w at wall (whole rig, testing only the 580, so assume ~100w for card, ~80% PSU eff.). For all straps and configs. Temps ... around the same.

1380mhz Core/2000mhz Mem, 1100mv/750mv.

Roland strap, 512/4/2, gaming mode : 750h/s.
Roland strap, 512/4/2, compute mode : 750h/s.
Roland strap, 896/8/2, gaming mode : ~700h/s.
Roland strap, 896/8/2, compute mode : 950h/s.

My strap, 512/4/2, gaming mode : 950h/s.
My strap, 512/4/2, compute mode : 950h/s.
My strap, 896/8/2, gaming mode : ~750h/s.
My strap, 896/8/2, compute mode : 1024h/s.

If the card is dedicated, the strap works realy good and stable (24h, 0 rejected shares). But if you also use the card for working with the OS, sometimes the miner doesn´t start with 896 worksize or BSOD. Dedicated no problems.
At 1100/2000 it makes  ~30 ETH wth claymore single mode, and no error.

Don´t try 1380/2000 ... 1100/2000 @850mv is maybe better (~890h/s) .

Good luck 

Pretty much depends...seeing this strap I seriously doubt it can handle 2050 without errors.

It skips some double 00 pairs and shows them as either 1 zero or doesn't show them at all. Also, it moves the bits around. This is not raw format. Not in endian, the bits are probably grouped together for each timing.

Also, i dont see how you can be making 930h/s with that strap at such low clocks and this wrong miner config.

At 1380/2000, with the same strap and 896/8/2, sgminer barely pulls 500h/s.
With 896/8/1 its doing 700h/s.
With 512/4/2 its doing 850h/s.

Also, that strap TRCDR is not the same with TRCDRA.

Same miner config for my RX470 and RX480 cards gives me even lower hash rates (450h/s). Considering, you need to do ~1k raw intensity total on both Linux and Windows, i dont see how you can be pushing 1.8k raw intensity.

My RX 470 4 GB Elpida Card makes 930 H/s XMR ... Core @1150, Mem @ 2050 ... sgminer 896/8/2 ... 55W(gpuz) ... 0 Memoryerrors
R0land´s Strap mix:  777000000000000022AA1C00315A5436A0550F15B68C1506004082007C041420CA8980A9020004C 01712262B612B3715 (copy from PBE)
The data from GPUZ are a little bit different : 777000000022AA1C0315A5436A055F15B68C1560408207C41420CA8980A9204C01712262B612B37 15
Why are the data different ?

which card is used to get 930 amd or nvidia

Yeah - EthOS doesn't even report the right voltage. I can get it DIRECTLY from the VRM. I can also fuck with shit like load-line calibration to achieve better undervolts - it's helpful when overvolting, but disabling it or diminishing it is perfect for undervolting. I have total control over ANYTHING that chip can do - it's far more than even MSI AB or a Windows tool will give.

ethash and equihash are the algos I've done the most work with, so I can't comment much on cryptonight.  What I do know is that until GCN3 (i.e. R9 380/380x) it didn't seem possible to max out the memory bandwidth.  I suspect it is just the memory controller design; arbitrating dozens of memory accesses is a very complicated thing.

Use gatelessgate (older version or a stable from Sharp releases) and set RI 896 W 8 Threads: 2 my 3x 580 4gb Aorus Hynix fly on these settings. 925 H/s with 1150/1175 Core 925 mv (950 for main gpu) errorless memory of (2090, 2175,2200) the 2200 one does 975 h/s

Also my rx 570 elpida/ 570 MSI gaming (hynix brand new, barely hits 2050mhz memory) both are within 840 h/s
Claymore is WAY lower. and Zawawa's miner is really advanced. i have some Hawaii cards that are taking my time though to fiddle with 9too hot here) so i didn't do more undervolting.

Have questions to the folks here.
Nerdralph, i reallly like you man and like your tool. Surely Wolf too and many others!
I have many questions though, i hope you can answer
Why Hawaii in general although having Loads of compute cores (40,44) and a massive memory bandwidth +even the 390/x one is hynix AJR. STILL lacks as hell in Cryptonight? Both GG/SGminer &XMR stak have not a SINGLE raw intensity that gives any meaningful speed! also, I can't even fill the memory on the 390! 1280 RI X2 threads never works well. i tried even 3 threads with 640 RI loads of combos never really worked!
The Hynix AJR is a modern memory (same as polaris!?)
Only Claymore which i beleve injects work in chunks somehow, gives me 870 h/s at stock R9 390 1040mhz/1500 when i change to -h 928 instead of 1280, -dmem 1 (which takes much less memory!) speed increases!

I'm about to use Nerdralph tool to edit all the 1000-1500 straps and see which gives highest speed without errors
OR, should i just loosen the 1625 straps and above(take a higher strap and nerdify it, cause the memory starts to give errors at 1625 stock) so i can overclock the memory to lets say 1750 mhz? because with claymore, even at 1040mhz, memory overclock gives a noticeable boost.

thanks in advance for any help.

Hi there,
I want to create my custom strap for hynix 8gb, so
I have decoded 777000000000000022AA1C00B56A6D46C0551017BE8E060C006AE6000C081420EA8900AB0300000 01B162C31C0313F17 to


I want to improve this timing strap
is there a guide/tutorial/pdf which explains what all these lines and values mean,what the possible range of values is etc etc..., please?

Possible gigabyte or msi GPU. Just use older bios revisions or replace by hand. Done that with latest gigabyte shitty revisions, replaced entire VRAM_Info table. I'll give you another hint about gigabytes g1 gaming bios rev. F80,F90 -> they are not with IR compat VRM like written in VOI table.

Cryptonight is much more dependant of your miner, and how you setup it

Guys could you please confirm if there are special custom strap for ETN. I mean:

optimal timing for ETH will be different than for cryptonight (ETH)?

I got different gpus with different kind of memories, on ETC/ETH almost all of them going above 30 mhs. But with ETN highest is 770 and in same cases not even 700 (same strap).

I haven't looked at cryptonight in a while, but you've piqued my curiosity.  Given your reference to HxD, you're suggesting something in the BIOS file other than straps can improve performance/stability, correct?

Everyone got used to modify straps and complain about stability...its not only timings that matter. Use your brain and HxD

Coreclock @1100 MHz, 831mv
Memoryclock @2000 MHz, 900 mv
sgminer rawintensity 896 -w 8 -g 2

XFX RX 470 4GB Elpida with eliovp's strap that's around the forum for long time with equal TRCDR/A fix, I make around 850h/s with claymore xmr 10.2 , and about 920h/s with gateless gate at 1170core/2000mem/875mv , at about 2-3-4 errors per hour. With claymore xmr 10.2 hashrate is stable with rare low fluctuations to 800-820 , with gateless gate 0.1.3-pre6b fluctuations are a bit more , but averages at about 920-925 , new gateless gate sharp gives me almost the same results , old gateless gate is based on sgminer , so hashrate is about the same as sgminer, for me a little bit more than sgminer-5.5.5-gm-nicehash-8.

edit: With the same strap, same 1170/2000/875 on ETH make 29.5mhs , eth and xmr are stable with these settings , memory can go up to 2050 before significant error rate , but stability goes down with it. Claymore xmr 10.2 settings -h 928 , gateless gate settings 896/8/2 , claymore eth 10.2 -dcri 8

nobody talks about clocks that they used to get those results

My RX 470 4 GB Elpida Card makes 890 h/s XMR with sgminer
... or 29.8 mh/s ETH with claymore

It's not just the memory type, it's the cryptonight algorithm itself.
I've been doing a lot of bios mods on different memory types, and while Cryptonight uses a lot less power than ethash, its a pain in the a** to get is fast and stable.