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1  Alternate cryptocurrencies / Mining (Altcoins) / Re: Sapphire RX 470 Reference - Elpida memory for Eth mining??? on: September 29, 2016, 02:45:39 AM
Today I tried to copy 1500 value to 1625, 1750 and 2000. The others left as is. The result is hashrate increased from about 22.5 MH to about 25.3 MH.

What should I change again to further increase hashrate to 28 or 29 MHS ??
2  Alternate cryptocurrencies / Mining (Altcoins) / Re: Sapphire RX 470 Reference - Elpida memory for Eth mining??? on: September 28, 2016, 02:00:16 PM
Quote from: Ambros on September 28, 2016, 08:22:15 AM
You should increase your hashrate to 27Mhash with a simple copy of memory timings from 1500 or 1750 strap to 2000.

How about other parameters such as GPU, Powertune, Memory, and also other timing. Leave it default??

Quote from: rednoW on September 28, 2016, 08:55:20 AM
very interesting, thanks for sharing your elpida rom.
Here is what we have - compare original straps from elpida and hynix sapphire ref rx470.

elpida (sapphire ref 470)
1375: 777000000000000022AA1C00EF516A3790550F14B20B9505006AE40074021420CA89C0A8020004C 01510232859283315
1500: 777000000000000022AA1C00315A6B3CA0550F15B68C1506006AE4007C041420CA8980A9020004C 01712262B612B3715
1625: 777000000000000022AA1C0073627C41B0551016BA0D9606006C060104061420EA8940AA030004C 01914292E692E3B16
1750: 777000000000000022AA1C00B56A7D46C0551017BE8E1607006C07010C081420FA8900AB030004C 01B162C3171313F17
2000: 999000000000000022AA1C0018F77E4FD055121946501708006C07011D0C1420FA8980AC030004C 01E19323781364718


hynix (sapphire ref 470)
1375: 777000000000000022339D00CECD593980551111AE8A84080048C6006C0014206A8900A00200312 0140F262B88252F15
1500: 777000000000000022339D00CE516A3D9055111230CB4409004AE600740114206A8900A00200312 0150F292F94273116
1625: 999000000000000022559D0010DE7B4480551312B78C450A004C0601750414206A8900A00200312 018112D34A42A3816
1750: 999000000000000022559D0031627C489055131339CDD50A004C06017D0514206A8900A00200312 019123037AD2C3A17
2000: BBB000000000000022889D0073EE8D53805515133ECF560C004E26017E0514206A8900A00200312 01C143840C5303F17

samsung (power color red dragon 480)
1375: 333000000000000022CC1C008C515A3DC0570D132DCB74090048C7007A0014207A8900A00200000 0150D293197282E15
1500: 555000000000000022CC1C00AD595B41C0570E14B00B450A0068C70003011420FA8900A00300000 0170E2B34A42A3116
1625: 555000000000000022CC1C00CE616C47D0570F15B48C250B006AE7000B031420FA8900A00300000 0190F2F39B22D3517
1750: 777000000000000022CC1C00106A6D4DD0571016B90D060C006AE70014051420FA8900A00300000 01B11333DC0303A17
2000: 777000000000000022CC1C0031F67E57F05711183FCFB60D006C070124081420FA8900A00300000 01E123A46DB354019
Straps are completely different, never use bios from internet, modify it by yourself!


Timing straps before 1375 is also different with Hynix.



Elpida : 200, 400, 800, 1000, 1250, 1375, 1425, 1500, 1625, 1750, 2000
Hynix : 400, 800, 900, 1000, 1125, 1250, 1375, 1425, 1500, 1625, 1750, 2000

Where is timing strap should I change in my rom file.. Just 1375, 1500, 1625, 1750, 2000 and leave others (200, 400, 800, 1000, 1250, 1425) with default value??
3  Alternate cryptocurrencies / Mining (Altcoins) / Sapphire RX 470 Reference - Elpida memory for Eth mining??? on: September 28, 2016, 07:50:33 AM
Hello, i'm a newbie on eth mining.

I bought Sapphire 470 4Gb Reference because I want flashing with Oakheart's or Boysie's roms. When I checked in with GPU-Z, it has a memory chipset from Elpida, while the Oakheart's and Boysie's roms is from Hynix.

I have searched on internet but have not found a modified rom for Sapphire 470 - Elpida memory. Can anyone here who can modify it or show me the way what must i edit to modify it? The target is 28-29 MH for single eth mining as oakheart and boysie roms.

This backup of the original roms: https://drive.google.com/file/d/0B1_9MOwzVXZwdExYZy1IUE9rTGc/view
Oakheart roms : https://forum.ethereum.org/discussion/8845/rx-470-mining/p11
Boyisie roms : https://forum.ethereum.org/discussion/9533/28mh-470oc-nitro-4gb-boysie-rom-dual-mining

Thanks
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