Re: Custom RAM Timings for GPU's with GDDR5 - DOWNLOAD LINKS - UPDATED
Quote from: Larvitar
Is tCKE linked with SEQ_MISC1?
Nice hash from damaged elpidas
About my lastest tests:
- No matter what I do with straps, at 1950+ I have incorrect ETH shares or compute errors in CN mining). 1930 is fine;
- Tried SEQ-MISQ1 and CAS from 1500 strap. Mining doesn't starts, bsod after closing miner.
- Tried tFAW32 bumped to 6. 12H/s loss. Sticking at 4.
regarding tcke, not exactly sure, but 90% it is indirectly dont forget there are other Misc lines not shown. What works though and confirmed by wolf (or thanks to wolf) tCL can tolerate +1 extra difference over the corresponding MISC-1 value. Also, you can change r2w and w2r freely for stability, that makes rules much different and easier, found a 1kh/s hynix (based on 1500 mhz strap though) with this way stable on hynix, non cooled at 2125 (few errors) this card used to do loads of errors @ 2025 mhz! and give 912 h/s with one click.Nice hash from damaged elpidas
About my lastest tests:
- No matter what I do with straps, at 1950+ I have incorrect ETH shares or compute errors in CN mining). 1930 is fine;
- Tried SEQ-MISQ1 and CAS from 1500 strap. Mining doesn't starts, bsod after closing miner.
- Tried tFAW32 bumped to 6. 12H/s loss. Sticking at 4.
for Deep diving though need to mod a 1625 or 1750 since base tCL is 19, thus 20 when you +1
If your elpida crashes at 1950 with whatever timings, that's similar to mine, whether solder/bga issue or power problems.
Now i fully understand the MR0 ,MR8 etc but the DAMN Binary bits relation to the 4 Hex characters! omg.
My memories are not Elpida, but Micron (not Micron-Elpida). BGA are not a problem, the ex-owner has 4 another cards the same model, and all are bad for memory overclock.
I changed MISC8 to 1500 base, lowered TRP_WRA a little and bumped tRP. To improve hashrate, I did RASMACT fine tuning (yeah, the "trial and error" way). Nice results. For now, 971H/s at 1200/1900. I think we have a "mission complete" for Micron, better than expected results, with much knowledge that can be used to improve Elpida and Samsung.
Elpida RX570 4GB is runing at 1200/2020. 985H/s. I think there is room for improvement over 1KH/s. Maybe getting closer to Samsung (at least in v7)
I find it really strange that your max memory closk is that low, look how high my micron goes on RX560:
https://bitcointalk.org/index.php?topic=3052745.0
BTW, does anyone have working, stable straps for Hynix and Micron with TRRD=5? Seems Elpida has least problems with it
Me too. But maybe the issue is memory cooling. When the weather is cold, memory can run at higher clock. When temperature rises at 35C+, run at 2000 is a pain.
Quote from: QuirkSilver
Elpida is hilariously funny, glad i started learning with it, no rules (almost!) , so for example for most eplidas an easy solution for low frequency memory (will get hotter though/unstable) try dropping trrd to 4 on the one click strap or SRB bios editior's pimped strap and loosening reads slightly increasing tRFC substantially (thanks to Kueto again who helped with this!) it gives you more stability for negligible speed loss, clock memory to 1875-2025 however, most non cooled memory, will give errors above 1900, still will give 545 h/s -585 h/s (560, will be 1000 h/s++ for 570/80)
Yep. No rules. I'm tuning my RX570 Strix 4GB Elpida, and the Micron techniques are useless lol