I used RX 480 and got only 24MB/s rate

pornluver

hero member

Activity: 960

Merit: 514

Quote from: thespycry on April 04, 2017, 04:44:52 PM

I have a Sapphire RX 480 8GB Nitro + OC which runs at 1342 MHz (boost speed)
I copied the bios and edited the memory straps 1750 -> 2000.
With that I am getting about 28.1 MH/s (instead of 24)
The thing is, if I increase the memory speed to 2250 Mhz (or lower the core as well), that has no effect and the speed stays at 28 MH/s.
really weird.. This happens on all of the cards I own..

Any ideas ?

You got to update the bios

Dowload polaris editor and atiwinflash

Then make sure you know how to switch to silent bios and via versa in your card.

Back up BOTH of your bios.

Then reply to this thread for your next lesson.

Qazo

full member

Activity: 211

Merit: 101

awesome, only replaced 2000 straps with 1750, i'm getting 2-3 mh/s more per card when dual mining DCR, temperatures also much better

settings:
5x480 nitro OC+
core 1100 , 1000mv
memory 2100, 1000mv
-dcri 35

eth - 135 mhs / dcr-4700 mhs

980w from wall - this is little bit to much because i have Corsair RM1000x

which settings should I change to get lower energy consumption from wall?

Greedful

newbie

Activity: 19

Merit: 0

Flashing an RX 480 with custom bios on dual mining ETH PASC improve hashrate ?

Ambros

hero member

Activity: 653

Merit: 500

Quote from: Qazo on April 05, 2017, 12:21:44 PM

nice thank you, this should be easy task to do... Will report results after I done it on weekend

Remember to back up the original BIOS before than flashing anything!
You can find some BIOS online, but it's still better to have a copy of your own

Qazo

full member

Activity: 211

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nice thank you, this should be easy task to do... Will report results after I done it on weekend

Ambros

hero member

Activity: 653

Merit: 500

Quote from: bijot01 on April 05, 2017, 08:18:52 AM

get polaris bios editor, take your original rom with ati flash, save it.
Open it with polaris and strap the timing memory 1725 to 2000Mhz (you copy the value of the 1725 timing ram on each line to 2000mhz sry for my english ^^ ) and flash your card with the new bios

https://www.youtube.com/watch?v=lhQ1SyydKso

bijot01

newbie

Activity: 16

Merit: 0

get polaris bios editor, take your original rom with ati flash, save it.
Open it with polaris and strap the timing memory 1725 to 2000Mhz (you copy the value of the 1725 timing ram on each line to 2000mhz sry for my english ^^ ) and flash your card with the new bios

Qazo

full member

Activity: 211

Merit: 101

I have samsung memory on mine

can you please help me with flashing bios, never done this before, some good tutorial?

tnx

bijot01

newbie

Activity: 16

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dude there is many post on this
to know your memory use gpu-z end check if you have hynix elpidia or samsung ram that's all after you take the rom for your memory

xTommYx

member

Activity: 190

Merit: 11

I am sure you have samsung memory cards.
There is this guy who runs memory at 2080 and core at 1125 or 1150 with 910mV and gets 29.3+ on these cards you have.
You need to find optimal settings. It's not just one or two parameters.

And ofcourse his mod is good for eth only, crashes bSod on dual if you try to increase memory a bit more.

thespycry

newbie

Activity: 42

Merit: 0

I have a Sapphire RX 480 8GB Nitro + OC which runs at 1342 MHz (boost speed)
I copied the bios and edited the memory straps 1750 -> 2000.
With that I am getting about 28.1 MH/s (instead of 24)
The thing is, if I increase the memory speed to 2250 Mhz (or lower the core as well), that has no effect and the speed stays at 28 MH/s.
really weird.. This happens on all of the cards I own..

Any ideas ?

pornluver

hero member

Activity: 960

Merit: 514

Quote from: bijot01 on April 04, 2017, 02:45:17 AM

...just try one thing : search rx480 mod bios eth on google maybe .......!!!!!!!? Huh

?

Obviously I've tried that and brick my card.

After unbrick it I realize that many of those mod bios are not compatible with my card. The question is, what should I match to ensure that the bios match my card before I flash a new bios.

Have you tried?

In fact, I went one step further.

I check my current bios and I saw a number

https://www.techpowerup.com/vgabios/?did=1002-67DF-174B-E347

1002 is vendor id
67DF is device id
174b is sub vendor id
e347 is vendor id

Guess what?

BIOS with that exact same number will brick the card.

bijot01

newbie

Activity: 16

Merit: 0

...just try one thing : search rx480 mod bios eth on google maybe .......!!!!!!!? Huh

?

pornluver

hero member

Activity: 960

Merit: 514

Quote from: bijot01 on April 01, 2017, 04:46:25 AM

use modding bios
you can go 30-34mh/s for 120w/ card (72w for cpu 45w for memory)

What is modding bios?

How do I know that a bios will match my card? Is there a serial number or something?

bijot01

newbie

Activity: 16

Merit: 0

use modding bios
you can go 30-34mh/s for 120w/ card (72w for cpu 45w for memory)

pornluver

hero member

Activity: 960

Merit: 514

Quote from: xxcsu on March 26, 2017, 12:44:05 AM

Quote from: pornluver on March 25, 2017, 07:58:28 PM

So I should increase memory clock memory and then update bios. How do I update bios?

https://bitcointalk.org/index.php?topic=1584617.new#new This looks very interesting. Lower power consumption and yet higher hash rate.

There's a bunch of .rom files. I do not know which one to use.

you need to use a modded bios with the exact bios version number what you have on your card. If you start flashing random downloaded bioses , you going to brick your card . warranty not covering the modded bios failure

How do I get the exact bios version number of the one currently on my card?

pbuva

full member

Activity: 194

Merit: 100

Quote from: pornluver on March 27, 2017, 11:33:25 AM

I overclocked my memory clock.
I got 27.8 MH/s and everything is stable.

What clocks you set?

Quote from: pornluver on March 27, 2017, 11:33:25 AM

Basically the system always crash everytime I tried other algorithm.

Nicehashminer is is basically a errors generator, many algos ended with to BSOD.

pornluver

hero member

Activity: 960

Merit: 514

I overclocked my memory clock.

I got 27.8 MH/s and everything is stable.

However, I can no longer run nicehash miner.

Basically the system always crash everytime I tried other algorithm. I have no idea whether this will cause any permanent damage to my card, motherboard or anything.

It seems that overclocking is not a good idea if I wanna do multi algo switching. I got to do ethash all the way.

Am I correct here?

What about custom rom? Do all RX 480 have the same custom rom or do I need to search for exact one that match my card? How do I know the exact type of RX 480 for my card?

dagarair

sr. member

Activity: 847

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if you are confused DON'T DO IT. You might have a nice doorstop.

Raja_MBZ

legendary

Activity: 1862

Merit: 1505

Quote from: pornluver on March 25, 2017, 07:58:28 PM

So I should increase memory clock memory and then update bios. How do I update bios?

https://bitcointalk.org/index.php?topic=1584617.new#new This looks very interesting. Lower power consumption and yet higher hash rate.

There's a bunch of .rom files. I do not know which one to use.

...if you find it difficult, try out only the Claymore's miner overclocking.

Set -mclock and -cclock at the command line.

Topic: I used RX 480 and got only 24MB/s rate (Read 2493 times)