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bardacuda
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April 03, 2017, 11:07:55 PM |
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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.
Vega release IS imminent (May or June). Also the 500 series Polaris rebrands which will be the direct replacement are due this month. |
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padrino
Legendary
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Activity: 1428
Merit: 1000
https://www.bitworks.io
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April 04, 2017, 01:58:55 AM |
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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.
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... |
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PontiacGTX
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Activity: 71
Merit: 10
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April 05, 2017, 04:48:49 AM |
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then what is the performance gain with mods on 470s?on equihash/ethash
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▒ NOW token ▒ by ChangeNOW ▒ Get the WIN! ▒ ChangeNOW - an instant Non-custodial Exchange Service (( changenow.io )) |
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niko2004x
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Activity: 126
Merit: 10
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April 06, 2017, 12:44:04 AM
Last edit: April 06, 2017, 03:42:03 AM by niko2004x |
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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. |
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zeftcool
Newbie
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Activity: 6
Merit: 0
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April 06, 2017, 05:53:32 AM |
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00 8D ** 00 VDDC control
work for nitro+ card but not work for nitro card
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laik2
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April 06, 2017, 06:03:57 AM |
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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. |
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lttsi
Newbie
Offline
Activity: 25
Merit: 0
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April 06, 2017, 08:55:14 AM
Last edit: April 06, 2017, 10:50:47 AM by lttsi |
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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
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doktor83
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April 06, 2017, 10:46:02 AM |
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that card has samsung mem so copy 1750 to 2000
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laik2
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April 06, 2017, 11:34:44 AM |
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that card has samsung mem so copy 1750 to 2000
there is tRAS value different from 0 so its either elpida or micron. |
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Zorg33
Jr. Member
Offline
Activity: 144
Merit: 2
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April 06, 2017, 12:27:08 PM |
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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..!?
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niko2004x
Member
Offline
Activity: 126
Merit: 10
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April 06, 2017, 12:56:51 PM |
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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. Most rx 460, a lot rx 470 from XFX and some rx 480 from Powercolor/XFX do not have i2c part in VoltageObjectInfo. |
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bardacuda
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April 06, 2017, 01:22:11 PM |
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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..!?
Get on it! I wanna be ready for Vega |
The future will rely on AI. SingularityNET lets anyone create, monetize, and use AI at scale. From the creators of Sophia the Robot. |
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dallase
Member
Offline
Activity: 129
Merit: 10
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April 06, 2017, 06:36:19 PM |
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that card has samsung mem so copy 1750 to 2000
there is tRAS value different from 0 so its either elpida or micron. he clearly stated it was Elpida. |
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doktor83
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April 06, 2017, 06:47:36 PM |
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that card has samsung mem so copy 1750 to 2000
there is tRAS value different from 0 so its either elpida or micron. he clearly stated it was Elpida. He edited his post, but doesnt matter, its not samsung  |
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niko2004x
Member
Offline
Activity: 126
Merit: 10
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April 07, 2017, 01:41:04 AM |
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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. 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 Do you know proper way to move UEFI/GOP data? It seems some bioses ( https://www.techpowerup.com/vgabios/190177/190177 for example) do not have bytes which could be to thrown out to fix UEFI/GOP offset. |
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Zorg33
Jr. Member
Offline
Activity: 144
Merit: 2
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April 07, 2017, 06:14:50 AM |
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Any success with micron?
I tested an msi 470 8GB Micron yesterday and most I could get was 27.3mh/s with the 1750 strap. Above 1950 it was not stable.
I heard of 30mh. Is it possible?
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Oakey22
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April 07, 2017, 08:35:35 PM |
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I have just got a few ASUS Dual rx480's and they have no settings for the i2c in whattool, it still possible to add this to the ROM using hex? as I understand its the 8D 00 ** 00 part that needs adding.
Samsung memory too
Anyone know or can give me a guiding hand?
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laik2
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April 08, 2017, 08:00:32 PM |
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I have just got a few ASUS Dual rx480's and they have no settings for the i2c in whattool, it still possible to add this to the ROM using hex? as I understand its the 8D 00 ** 00 part that needs adding.
Samsung memory too
Anyone know or can give me a guiding hand?
It doesn't have default VDDC offset, hense it "might" support VDDC/VDDCI offsets both...I will confirm in about 15 days when my 4g dual strix arrive. |
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nerdralph
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April 09, 2017, 12:23:06 AM |
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Anyone find out how to change the refresh interval through the straps or elsewhere in the BIOS? I'm not talking about tRFC the refresh command delay, I'm talking about the refresh interval or period (tREFI & tREF). I want to reduce the refresh overhead by refreshing the RAM less frequently. Wolf says he's only been able to do it by directly writing to the memory controller registers. Obviously changing values in the strap or the BIOS would be easier. Unless Wolf decides to release that code too... :-)
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