[BIOS Mod] RX480 -> RX580 Conversions + How-to RX470/RX480 -> RX570/RX580 - Page 2 - Overclock.net - An Overclocking Community

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[BIOS Mod] RX480 -> RX580 Conversions + How-to RX470/RX480 -> RX570/RX580

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post #11 of 1041 (permalink) Old 07-28-2017, 02:09 PM - Thread Starter
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If the power draw goes up and your fps down, the card is throtteling because of temps or powerlimit. check vcore, powerlimit, cooling.
You can change Vcore with offset or modding the max voltage (post#3).
Please read PBE Notes and only change sub id and sub vendor as seen in post#3.

for power draw comparsion between 580/480, take the original conversion at exact same voltage/clocks (watman or software). Afterburner delivers more reliable values.
for exact values (without driver related don't knows), take the wattage of the whole system with a ammeter or something.

for the strix someone measured this: Warning: Spoiler! (Click to show)
Quote:
Stock Strix 480 Bios (1310 MHz)
Desktop = 81,1W
-Heaven 4.0 = 288.4W
-Undervolt Heaven 4.0 = 258.6W
--Heaven points = 2526

Stockstrix 580 Bios (1360 MHz)
Desktop = 72,6W
-Heaven 4.0 = 326.8W
-Undervolt Heaven 4.0 = 288.2W
-Heaven points = 2602

Your Strix Bios 480-580 1.0008 (1340 MHz) with 3.1 timings.
Desktop = 72,4W
-Heaven 4.0 = 312.2W
-Undervolt Heaven 4.0 = 285.7W
-Heaven points = 2762

For comparison with Powercolor R9 280X (1030 MHz)
Desktop = 102,3W
-Heaven 4.0 = 331.6W
-Undervolt not measured
--Heaven points = 2306

for any worries about vrm, it works as intended (i2c proofen), so any more wattage is coming from more Vcore and the demands of the GPU. You won't kill your card as you could with a 580 BIOS from another card. So, whatever some software-tool is telling you, the power draw should be at least with the original conversion the same.

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post #12 of 1041 (permalink) Old 07-28-2017, 08:05 PM
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Has anyone tested changing the VDCCI value with Hex and how it behaves with memory overclocks?

For my 470 XFX single fan, the On Semi controller measures it (while IR's dont show it, at least on HWinfo) and it was 0.9v, which isnt any of the values the other bioses in this thread have. From what I gather on earlier Radeon IMCs, more doesnt always mean better and too much can also be hurtful to memory stability.

Also, is this value the actual VDCCI or the pointer thingy that was discussed in the other thread? Thanks in advance!
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post #13 of 1041 (permalink) Old 07-28-2017, 08:28 PM
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Will this work on a RX460 as well? Got a XFX Double Disappation RX460. Be fun to turn it into a 560 if possible?

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post #14 of 1041 (permalink) Old 07-28-2017, 08:40 PM - Thread Starter
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Quote:
Originally Posted by PPBottle View Post

Has anyone tested changing the VDCCI value with Hex and how it behaves with memory overclocks?

For my 470 XFX single fan, the On Semi controller measures it (while IR's dont show it, at least on HWinfo) and it was 0.9v, which isnt any of the values the other bioses in this thread have. From what I gather on earlier Radeon IMCs, more doesnt always mean better and too much can also be hurtful to memory stability.

Also, is this value the actual VDCCI or the pointer thingy that was discussed in the other thread? Thanks in advance!
too tired to answer that in detail, i think mynm solved that and i allowed myself do add vddci. and i think i was right; but it is the pointer, the value for vddci is also found in the bios, it is right next to the pointer:
Quote:
Originally Posted by post#1 
00 0C B6 03
means 950mV.. ok let's have a closer look:
Code:
typedef struct _PolarisMemClkDepRecord
{
        uint8_t VDDC;
        uint16_t VDDCI;
        int16_t VDDCGFXOffset;
        uint16_t MVDD;
        uint32_t MemClk;
        uint16_t Reserved;
}
Code:
0C B6 03 00 00 E8 03 40 0D 03 00 00 00

0C - > "The Pointer" is VDDC, cause it actually points to a VDDC voltage, but it's IMC/VDDCI cap something..
B6 03 -> VDDCI (950mV)
00 00 -> VDDCGFXOffset
E8 03 -> MVDD (1000mV) this is the value PBE reads as mem voltage..
40 0D 03 00-> MemClk (2000MHz x100)
00 00 -> Reserved

this is the same for all 580 and 480 BIOS, only VDDC voltage table has changed, so 0C means 1000mV for the 580 BIOS and 1050mV in a 480 version. ok, that was some detail biggrin.gif

no one ever experimented with that. would be happy for some data. smile.gif

Quote:
Originally Posted by davidm71 View Post

Will this work on a RX460 as well? Got a XFX Double Disappation RX460. Be fun to turn it into a 560 if possible?
someone tried in another thread. didn't went that well..

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post #15 of 1041 (permalink) Old 07-29-2017, 12:33 AM
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hi i flashed the xfx 580 bios on my 480 gtr black edition, in intensive games i have no problems playing, however in games that do not require much graphical power(league of legends) i get flickering screens while playing in windowed mode, freesync is off what could be the problem?
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post #16 of 1041 (permalink) Old 07-29-2017, 05:07 AM - Thread Starter
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i am guessing u are using the dvi port? the three DP and one HDMI should work fine, with the other ports, i will fix that in the future.

try using the original conversion; there shouldn't be any problems with that one.

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post #17 of 1041 (permalink) Old 07-29-2017, 10:51 AM
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im actually using 1 dp and 1 hdmi port. but i will try the original conversion
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post #18 of 1041 (permalink) Old 07-29-2017, 11:02 AM
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Quote:
Originally Posted by jdraco View Post

im actually using 1 dp and 1 hdmi port. but i will try the original conversion

Just tried the original xfx bios, has a weird 28watt usage in idle and crashes almosot instantly when trying to start a game. My gpu model is XFX RX 480 GTR Black edition.
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post #19 of 1041 (permalink) Old 07-29-2017, 11:38 AM - Thread Starter
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Funny. Just today i had a PM that the same problem (flickering on the DVI with a XFX GTR) doesn't appear with the XFX GTR BIOS from post#2. Should definitely work fine.

You can post your original BIOS to clarify things. If you also had trouble with the other ports, and the original convertions made things worse, u might have the wrong card. My GTR conversions doesn't work with the RS version, if you have one of those -> post#3.

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post #20 of 1041 (permalink) Old 07-29-2017, 01:02 PM
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Here is the rom, not too sure why i cannot upload my bios to overclock.net.


https://drive.google.com/open?id=0B-kGo4gLXyMIbDFQTWpKTTBEV0E
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