Low Hashrate

[Nth]

Hi - wondering if anyone has any insight here.

I've been mining eth with 2 RX480s for months and i've been getting around 20Mh/s per card.

The hash rates on one of my cards has dropped to ~3Mh/s. I'm using Claymore v10.2 (was using an older version before i noticed this so just switched). What steps should i take to fault find please?

Many Thanks

[preda]

20mh for rx 480 bro you are totally using bad your cards.

Tell which driver are you using... Did you mod the bios?
Os version? Need some information for help you

[Nth]

using them bad? should i be getting a higher hash rate?

Okay so i just uninstalled my drivers and reinstalled the latest ones: 17.12.2

I have not modded my bios or overclocked the cards.
I am using Windows 10 64 bit.

Since reinstalling my drivers i am now seeing 18Mh/s per card, which is what I'm used to (normal for my system).

Does this seem right?

[xxcsu]

give us your full system spec please .
No , 18MH/s for a RX 480 cards are not good at all ...
did you set the virtual memory at least 16GB ?
We are talking about  4GB or 8 GB cards ?
what is your system memory ? 1-2-3-4-8 GB ?
what is in your .bat file ?

[Nth]

Intel i5-7600
16GB RAM
2x MSI RX 480 8GB
EVGA 500B power supply

Do you need anything else?

I remember changing my virtual memory to 16GB at some point, will check it now.

my bat file is as follows:

GPU_FORCE_64BIT_PTR 0
GPU_MAX_HEAP_SIZE 100
GPU_USE_SYNC_OBJECTS 1
GPU_MAX_ALLOC_PERCENT 100
GPU_SINGLE_ALLOC_PERCENT 100
EthDcrMiner64.exe -epool eu1.ethermine.org:14444 -ewal [WALLET ADDRESS] -epsw x

edit: i've just changed the virtual memory to 16GB. still getting 18Mh/s per card.

[blackmomba]

I actually have the same issue with my wife's RX480 Sapphire Nitro

Tried a lot of tweaking of ram speeds and the card doesn't respond to anything really. It's still under warranty so I haven't tried flashing yet but I suppose that's the next step...

[Nth]

bit weird that i have 2 cards with the same issue though.

i actually started with about 25Mh/s but it's slowly dropping off if i remember correctly. do you think it's just wear and tear?

[Cereberus]

bit weird that i have 2 cards with the same issue though.

i actually started with about 25Mh/s but it's slowly dropping off if i remember correctly. do you think it's just wear and tear?

No wear and tear, I am mining with RX 480 Sapphire Nitro+ at 24.7 Mhsh standard hashrate and because my cards have Samsung memory without Bios mod but only setting memory to 2250 in MSI afterburner they mine at 27.9 Mhsh each. I believe you will have Micron or Elpida memory and if you don't know, download and install GPU-Z and it will show what kind of GDDR5 Memory your cards have (Samsung,Hynix,Micron or Elpida).

[Nth]

bit weird that i have 2 cards with the same issue though.

i actually started with about 25Mh/s but it's slowly dropping off if i remember correctly. do you think it's just wear and tear?

No wear and tear, I am mining with RX 480 Sapphire Nitro+ at 24.7 Mhsh standard hashrate and because my cards have Samsung memory without Bios mod but only setting memory to 2250 in MSI afterburner they mine at 27.9 Mhsh each. I believe you will have Micron or Elpida memory and if you don't know, download and install GPU-Z and it will show what kind of GDDR5 Memory your cards have (Samsung,Hynix,Micron or Elpida).

do you mean the brand of my memory (RAM)?

It's Corsair Vengeance LPX 2400MHz DDR4

[xxcsu]

I remember changing my virtual memory to 16GB at some point, will check it now.

my bat file is as follows:

GPU_FORCE_64BIT_PTR 0
GPU_MAX_HEAP_SIZE 100
GPU_USE_SYNC_OBJECTS 1
GPU_MAX_ALLOC_PERCENT 100
GPU_SINGLE_ALLOC_PERCENT 100
EthDcrMiner64.exe -epool eu1.ethermine.org:14444 -ewal [WALLET ADDRESS] -epsw x

edit: i've just changed the virtual memory to 16GB. still getting 18Mh/s per card.

try to put -dcri 30 in your bat file and play with the dcri number from 30 down to lower numbers ,it might help

EthDcrMiner64.exe -epool eu1.ethermine.org:14444 -ewal [WALLET ADDRESS] -epsw x -dcri 30

do you mean the brand of my memory (RAM)?
It's Corsair Vengeance LPX 2400MHz DDR4

Its not your system memory , its the memory brand on your vga card that 8GB

Do you have a original bios on the cards ? or you flashed the bios ?
did you tried to switch the bios switch to the anoter position ? your cards have 2 different bioses

[Nth]

I remember changing my virtual memory to 16GB at some point, will check it now.

my bat file is as follows:

GPU_FORCE_64BIT_PTR 0
GPU_MAX_HEAP_SIZE 100
GPU_USE_SYNC_OBJECTS 1
GPU_MAX_ALLOC_PERCENT 100
GPU_SINGLE_ALLOC_PERCENT 100
EthDcrMiner64.exe -epool eu1.ethermine.org:14444 -ewal [WALLET ADDRESS] -epsw x

edit: i've just changed the virtual memory to 16GB. still getting 18Mh/s per card.

try to put -dcri 30 in your bat file and play with the dcri number from 30 down to lower numbers ,it might help

EthDcrMiner64.exe -epool eu1.ethermine.org:14444 -ewal [WALLET ADDRESS] -epsw x -dcri 30

do you mean the brand of my memory (RAM)?
It's Corsair Vengeance LPX 2400MHz DDR4

Its not your system memory , its the memory brand on your vga card that 8GB

Do you have a original bios on the cards ? or you flashed the bios ?
did you tried to switch the bios switch to the anoter position ? your cards have 2 different bioses

i have not altered with the bios of the cards.

setting -dcri to various values has not changed the hash rate.

will download gpu z tomorrow and get the memory brand of the gpu and report back

[Nth]

My GPUs have Samsung GDDR5 memory.

[xxcsu]

rx 480 with samsung memory you should get 24MH/s hashing speed without any mod , overclocking

[xxcsu]

Im quoting myself from another topic  , i hope my advice is going to help you also
Im also suggest , place a -dcri 30 option in your bat file , and after followed my instruction , play with the dcri value , slowly start overclocking your cards

use the latest claymores miner from HERE
Use the AMD Blockchain Compute Driver from HERE
- Uninstall you installed driver with DDU use safe mode
- install blockcahin driver
- make sure you set the virtual memory at least to 16GB
- use claymore latest miner  , dont do any overclocking yet , just see the hashrate for a 5-10 minutes ... , then close the miner , reboot your computer set the mem  clock higher 2025 then 2050 , then 2075 then 2100  , you also need to do some change with the gpu max freq , and some undervolting
Let us know how if its helped

[Nth]

Okay so the AMD mining driver seems to have made the biggest difference. now getting ~24.8Mh/s on each card.

I was reluctant to use it because i also play games when not mining, but the internet says game performance doesn't drop with it.

Thanks for the help all. Is there a thread here on how to overclock? I've never really looked into it, would i see much increase?

[xxcsu]

just found this for you on youtube
Beginners step by step [how-to] overclock your AMD video card (RX 480) with wattman
for mining dont icrease the gpu frequency , increase the memory frequency slowly step by step ,and the same time decrease the gpu frequency and voltage a little bit

keep it in your mind ... for mining and gaming you need different overclocking settings