Re: Custom RAM Timings for GPU's with GDDR5 - DOWNLOAD LINKS

Quote from: QuirkSilver on July 25, 2018, 03:43:20 PM

If its micron -60 variant (have it in GARBAGE 560D by sapphire, 14 CU even 52% asic quality, even unlocked to 16 CU asic goes to nearly 50%) But at least in that 560D its stated that its a 1500mhz memory... still, the one click strap does 500-512 h/s and maximises at around 1925-1950 with occasional errors, i did mod one of them with thermal pads +a copper shim not much expected though... sometimes the case might be factory overclock "maybe" then your 470 comes with 1750 mhz out of the box, but will never pass 1900-2000mhz

Drooling here for one of those mining crash sales on ebay, 580 8gb Gaming X PLUS (Samsung, never owned such a thing!)

its for~220 USD (in australia)

Apparently is a Micron -70 variant. It runs at 1900 with zero errors. I'm trying to improve performance per clock and after I will try to find the sweet spot between 1900 and 2000.

Quote from: heavyarms1912 on July 25, 2018, 01:30:20 PM

Quote from: Larvitar on July 25, 2018, 11:27:07 AM

Quote from: Branko on July 25, 2018, 07:39:43 AM

Quote from: Larvitar on July 25, 2018, 01:59:23 AM

https://imgur.com/gxtKJVB

D9SXD. Apparently is a 7Gbps IC

Same as mine that goes up to 2300...but to go that high, cooling should be made
in such way that metal plate covers not only GPU, but memory, too (and replacing
usually bad factory thermal paste with quality one)

However, 2100 should be easy to achieve

Also, important is to find sweet spot between voltage and temperature (voltage increase
improves stability, but only up to the point where increased heat starts to be a problem)

I bought it from a miner, so it came with some thermalpads and a good biosmod, but not all ICs are cooled (only 5/8) because the other three arent in the cooler contact area. I ordered some heatsinks at Aliexpress but it will take a little time to arrive (3 months. Yeah, Brazil's mail is poor).

About the memory strap: The board came to me with Matthev timing. I tried many timings (heavyarms, yours, some for anorak's) and the original one (matthev) was best (at least at 1900~2000 clocks). I did some changes/tests and for now I have it:
777000000000000022CC1C00CE615C41C0571016B30CD50900400700140514207A8900A00300000 010122F3F9D2C3617

Is there a way to improve "performance per clock" for Cryptonight? (considering that it couldn't run at 2000+)

Some don't clock as high as others do. I have couple of cards that don't go above 1950 without causing lots of memory errors and eventually crashing.
The core on these cards need higher voltage and the cooler isn't good on these cards either which makes it even worse for stability. Both cards are from same batch so it might be just that.

Well, I did some "cherry-picking" with your, Branko and PBE straps and I'm getting 918H/s at 1150/1900 in V7. Well, it's greater than PBE one.

My last custom strap is there: 777000000000000022CC1C00CE615C41C0571016B30C150800408700140514207A8900A00300000 010122F3F812C3617
ACT/RASMAC/RD/WR/TRC from Ubermix/Heavyarms
tRFC from Branko
tRCRD/A and TRCDW/A and base from Matthev
tRRD from PBE.
tFAW32 increased to 4 (more stability with no negative performance issues)

MISC values from Samsung's Ubermix gives me BSOD before run miner. I'll try other values.