There's been HBM mentioned earlier before in this topic....
I got my hands on my first card with HBM (Sap Fury Nitro).
It's behaviour is f@ckin magic! Totally different from GDDR5.
I got ideas from modded Nano and Fury X roms from the OCN thread and copied 400 timings to 500&600.
But nothing changed even a bit, although I copied the straps to both 00 & 01 tables! The hashrates remained exactly the same.
I discovered there is a much more complex mechanism that determines timings dynamically.
Clearly there are frequency ranges about ~20MHz wide, where the timings change gradualy.
I found a sweet spot where I get above 33mh with stock timing, but there is much more I think.
And also there is a strong connection between GPU&HBM freqs, the performance gain is not linear.
And what is with that 100MHz first strap? (There are straps for 100, 400, 500, 600)
So many questions...so much pain..!?
Topic: Custom RAM Timings for GPU's with GDDR5 - DOWNLOAD LINKS - UPDATED - page 34. (Read 155485 times)
April 06, 2017, 08:27:08 AM
April 06, 2017, 07:34:44 AM
that card has samsung mem so copy 1750 to 2000
there is tRAS value different from 0 so its either elpida or micron. April 06, 2017, 06:46:02 AM
that card has samsung mem so copy 1750 to 2000
April 06, 2017, 04:55:14 AM
Hi , can help me improve my nitro rx 470 nitro oc+ Elpida :
Original timming
1:1500 :777000000000000022339D00CE516A3D9055111230CB4409004AE600740114206A8900A00200312 0150F292F94273116
1:1625 :999000000000000022559D0010DE7B4480551312B78C450A004C0601750414206A8900A00200312 018112D34A42A3816
2:1500 : 777000000000000022AA1C00315A6B3CA0550F15B68C1506006AE4007C041420CA8980A90200000 01712262B612B3715
2:1625 : 777000000000000022AA1C0073627C41B0551016BA0D9606006C060104061420EA8940AA0300000 01914292E692E3B16
I'm testing with copy strap 1:1500 for all but my mem card can't stable with mem 2000 .And Strap 1:1625 can stable with mem 2000 but got speed ~27M ...
Thank you
Original timming
1:1500 :777000000000000022339D00CE516A3D9055111230CB4409004AE600740114206A8900A00200312 0150F292F94273116
1:1625 :999000000000000022559D0010DE7B4480551312B78C450A004C0601750414206A8900A00200312 018112D34A42A3816
2:1500 : 777000000000000022AA1C00315A6B3CA0550F15B68C1506006AE4007C041420CA8980A90200000 01712262B612B3715
2:1625 : 777000000000000022AA1C0073627C41B0551016BA0D9606006C060104061420EA8940AA0300000 01914292E692E3B16
I'm testing with copy strap 1:1500 for all but my mem card can't stable with mem 2000 .And Strap 1:1625 can stable with mem 2000 but got speed ~27M ...
Thank you
April 06, 2017, 02:33:10 AM
00 8D ** 00 VDDC control
work for nitro+ card but not work for nitro card
It works for all which bios can be opened with atombiosreader. I had only one XFX that didn't have(or couldn't find it) VOI.work for nitro+ card but not work for nitro card
yes it work but just for IR3567B nitro+ card
nitro card using NCP81022 and it not work
they are different card
all nitro and nitro+ bios is same and can be oppened by atombiosreader
i can add offset for all bios,but power offset only affected to nitro+ card,not for nitro
480 nitro+ vs nitro
http://sapphirenitro.sapphiretech.com/en/480-4.html
http://sapphirenitro.sapphiretech.com/en/rx-480-4.html
470 nitro+ vs nitro
http://sapphirenitro.sapphiretech.com/en/470-4.html
http://sapphirenitro.sapphiretech.com/en/rx-470-4.html
April 06, 2017, 02:03:57 AM
00 8D ** 00 VDDC control
work for nitro+ card but not work for nitro card
It works for all which bios can be opened with atombiosreader. I had only one XFX that didn't have(or couldn't find it) VOI. work for nitro+ card but not work for nitro card
April 06, 2017, 01:53:32 AM
00 8D ** 00 VDDC control
work for nitro+ card but not work for nitro card
work for nitro+ card but not work for nitro card
April 05, 2017, 08:44:04 PM
It appears I can control memory voltage! Sweet!
Did you have to directly control it via i2c, or was it easier than that?
Yes and no. Used the VBIOS.
00 8D ** 00 VDDC control
00 8E ** 00 MVDDC Control
you can easily add it into the rom.
Ok, nailed it, written nice tool for myself.
Question to gurus.
Am I understanding it right and some RX cards do not have i2c voltage object in bios?
For example https://www.techpowerup.com/vgabios/185464/powercolor-rx480-2048-160728.
April 05, 2017, 12:48:49 AM
then what is the performance gain with mods on 470s?on equihash/ethash
April 03, 2017, 09:58:55 PM
I have been watching this thread with anticipation of jumping into the RX480 world.
Last week tried to order a bunch of MSI RX480 X Gaming 8GB. Both Jet and B&H Photo said were in stock. Just got an email from both saying manufacturer shortage. They each cancelled the order. Sounds to me like Vega release might be imminent.
Sorry, I know it's off topic, sort of.
Last week tried to order a bunch of MSI RX480 X Gaming 8GB. Both Jet and B&H Photo said were in stock. Just got an email from both saying manufacturer shortage. They each cancelled the order. Sounds to me like Vega release might be imminent.
Sorry, I know it's off topic, sort of.
Vega release IS imminent (May or June). Also the 500 series Polaris rebrands which will be the direct replacement are due this month.
It was not the Vega release, but the 500 series parts, same ASIC as the 400 series cards, and it seems AMD is a bit short on parts so they canned orders across the market...
April 03, 2017, 07:07:55 PM
I have been watching this thread with anticipation of jumping into the RX480 world.
Last week tried to order a bunch of MSI RX480 X Gaming 8GB. Both Jet and B&H Photo said were in stock. Just got an email from both saying manufacturer shortage. They each cancelled the order. Sounds to me like Vega release might be imminent.
Sorry, I know it's off topic, sort of.
Last week tried to order a bunch of MSI RX480 X Gaming 8GB. Both Jet and B&H Photo said were in stock. Just got an email from both saying manufacturer shortage. They each cancelled the order. Sounds to me like Vega release might be imminent.
Sorry, I know it's off topic, sort of.
Vega release IS imminent (May or June). Also the 500 series Polaris rebrands which will be the direct replacement are due this month.
April 03, 2017, 06:49:49 PM
I have 1625 timing and i'm hitting 29+ on all my Hynix cards.
In case you didn't see my PM, how high are you clocking your mem with that strap?
EDIT: for those interested he said 2025
April 03, 2017, 06:27:59 PM
I have been watching this thread with anticipation of jumping into the RX480 world.
Last week tried to order a bunch of MSI RX480 X Gaming 8GB. Both Jet and B&H Photo said were in stock. Just got an email from both saying manufacturer shortage. They each cancelled the order. Sounds to me like Vega release might be imminent.
Sorry, I know it's off topic, sort of.
Last week tried to order a bunch of MSI RX480 X Gaming 8GB. Both Jet and B&H Photo said were in stock. Just got an email from both saying manufacturer shortage. They each cancelled the order. Sounds to me like Vega release might be imminent.
Sorry, I know it's off topic, sort of.
April 03, 2017, 06:25:38 PM
Thanks for the replies, will try it once i am back home.
Also huge thanks to OhGodAGirl, Wolf0, nerdralph, doktor83 and kilo17!
Also huge thanks to OhGodAGirl, Wolf0, nerdralph, doktor83 and kilo17!
April 03, 2017, 06:23:32 PM
I have 1625 timing and i'm hitting 29+ on all my Hynix cards.
March 27, 2017, 10:47:26 AM
It appears I can control memory voltage! Sweet!
Did you have to directly control it via i2c, or was it easier than that?
Yes and no. Used the VBIOS.
April 03, 2017, 06:22:12 PM
i have a rx470 4gb hynix memory (sapphire nitro+) so i just use polaris bios editor , take the 1500 strap , put it into nr's mod site and paste the result it into 1500 , 1625 , 1750 and 2000 ?
or am i missing something?
or am i missing something?
Sounds right to me! You can even experiment with the 1625 strap if you want with hynix, it seems like it has the potential to get like 0.5mhs more if you can clock the mem high enough
April 03, 2017, 06:12:39 PM
i have a rx470 4gb hynix memory (sapphire nitro+) so i just use polaris bios editor , take the 1500 strap , put it into nr's mod site and paste the result it into 1500 , 1625 , 1750 and 2000 ?
or am i missing something?
or am i missing something?
April 03, 2017, 05:59:12 PM
I may have read someone say that powercolor 470 4gb red dragon has always had samsung. I have 2 of them (single fan) and they both have samsung
i also have a powercolor red dragon 4gb single fan with samsung memory. goes good on eth with the 1750 strap mod but it has a crappy hsf so runs warm.
Yeah those cheap Powercolor cards are absolute garbage. Funny enough it seems to cool as well as the Asus White's.
March 27, 2017, 08:50:31 AM
It's based on the 1625 strap, since the 1500 strap wasn't stable for me beyond 1875.
That's very strange, I have several rx with hynix and the 1500 strap is the most stable at least up to 2050.Maybe your cards have better cooling for the RAM? This is an Asus Strix. After tuning the 1625 strap, it was stable at ~27.2Mh with a 1950 mem clock. Now I'm testing 2000.
If it's a Strix you might have memory voltage control, have you tried/checked this?
I believe their custom VRM chip does control the memory voltage, but I haven't looked into it much. Since the RAM is not cooled (no thermal connection to the heatsink), I thought bumping the memory voltage would make things worse. The tuned 1625 strap is working quite well so far. It tested OK at 2000, and now I'm trying 2050.
Once I've found the limit, I may look into the memory voltage to control power use, and see if it is stable with lower memory voltages.
I have a Strix, pretty sure it doesn't work.
EDIT: Wait... wait... there's something here....
It appears I can control memory voltage! Sweet!
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