Very low hash rate with Radeon R9 270X OC 2GB WindForce

[lethysek]

One week ago I bought new computer. My whole idea was to use it also for mining. So I found out that R9 200 series are good for mining so I bought one (Radeon R9 270X OC 2GB WindForce).

The problem is that I have max. 350 kh/s with this card. When i read about it, ppl said that 470-490 kh/s is normal so why I got just 350?

My comp:
i5-4440
MSI B85-G43
8gb ram
Western Digital Blue 1 TB
Radeon R9 270X OC 2GB WindForce(3 wentylatory)
Zalman Z3 Plus
Corsair VS 450W

Drivers: Catalyst 13.1


I tried everything.

Update drivers, bios, use BAMT for mining, changing cgminer conf (tried almost every setting, my settings was tested on other radeon r9 270x and friend had 480 kh/s when I got just 350).

my current cgminer settings:
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
cgminer.exe --scrypt -o stratum+tcp://pool.com -u worker -p pass --no-submit-stale --verbose -I 18 -w 128 -g 2 --thread-concurrency 10239 --gpu-fan 85 --lookup-gap 2 --gpu-engine 1130 --gpu-memclock 1500 --gpu-powertune 20

My bios:
http://s14.postimg.org/g3p5ydzch/bios.png

When I use BAMT I have 450kh/s for like an hour and then kernel error appears and then I have 250kh/s.
Using cgminer on windows 350kh/s.


How I can fix this? What is wrong?

[Lauda]

Have you tried installing beta drivers and latest SDK?

[lethysek]

Have you tried installing beta drivers and latest SDK?

yep, installed 10 minutes ago.

Catalyst beta + latest amd SDK.

If I need to be honest, works worse than before.

[Lauda]

Have you tried installing beta drivers and latest SDK?

yep, installed 10 minutes ago.

Catalyst beta + latest amd SDK.

If I need to be honest, works worse than before.

Then I have a question for you: Why do you invest in something when you have zero knowledge about it?
That's like buying shares in a company about which you know nothing. Smart.
Good luck anyways.

[lethysek]

Have you tried installing beta drivers and latest SDK?

yep, installed 10 minutes ago.

Catalyst beta + latest amd SDK.

If I need to be honest, works worse than before.

Then I have a question for you: Why do you invest in something when you have zero knowledge about it?
That's like buying shares in a company about which you know nothing. Smart.
Good luck anyways.

Why do you think that I got zero knowledge about this?

I just got problem with hash rates. Something is wrong and I dont know what is it, you dont know too because your answer doesnt help me so...?

Maybe someone had similar or like this problem with hash rates, that why I created that topic.

[Lauda]

Why do you think that I got zero knowledge about this?

I just got problem with hash rates. Something is wrong and I dont know what is it, you dont know too because your answer doesnt help me so...?

Maybe someone had similar or like this problem with hash rates, that why I created that topic.

This is contradictory.
If you had enough knowledge you would most likely solve your problems on your own. Talking from experience.

[redrage]

look here --> https://litecoin.info/Mining_hardware_comparison

From what i see should get around 400khs but I'm far from an expert but maybe try this:

cgminer.exe --scrypt -o stratum+tcp://pool.com -u worker -p pass --no-submit-stale --verbose -I 18 -w 256 -g 1 --thread-concurrency 15000 --gpu-fan 85 --lookup-gap 2 --gpu-engine 1130 --gpu-memclock 1500 --gpu-powertune 20

[InCoinsITrust]

You have to put more effort to find best combination of core/memory. Every card can be different. It may take a wile. Drivers should be ok, cgminer settings is what you need to tune a little more.

[Lauda]

look here --> https://litecoin.info/Mining_hardware_comparison

From what i see should get around 400khs but I'm far from an expert but maybe try this:

cgminer.exe --scrypt -o stratum+tcp://pool.com -u worker -p pass --no-submit-stale --verbose -I 18 -w 256 -g 1 --thread-concurrency 15000 --gpu-fan 85 --lookup-gap 2 --gpu-engine 1130 --gpu-memclock 1500 --gpu-powertune 20

My 270x card provides me with 480-490 although it is not from gigabyte.

[Wipeout2097]

cgminer.exe --scrypt -o stratum+tcp://pool.com -u worker -p pass  -I 18 -w 256 -g 1 --thread-concurrency 24000 --gpu-fan 85 --lookup-gap 2 --gpu-engine 1120 --gpu-memclock 1500 --gpu-powertune 20

[lethysek]

cgminer.exe --scrypt -o stratum+tcp://pool.com -u worker -p pass  -I 18 -w 256 -g 1 --thread-concurrency 24000 --gpu-fan 85 --lookup-gap 2 --gpu-engine 1120 --gpu-memclock 1500 --gpu-powertune 20

330 kh/s on this conf

I think that it is not a problem of cgminer configuration, because I tried a lot of this and always hash rate is similar.

Problem is propably somewhere else, but the question is where? 

[Wipeout2097]

cgminer.exe --scrypt -o stratum+tcp://pool.com -u worker -p pass  -I 18 -w 256 -g 1 --thread-concurrency 24000 --gpu-fan 85 --lookup-gap 2 --gpu-engine 1120 --gpu-memclock 1500 --gpu-powertune 20

330 kh/s on this conf

I think that it is not a problem of cgminer configuration, because I tried a lot of this and always hash rate is similar.

Problem is propably somewhere else, but the question is where?  

The problem is actually known: VRAM latency. There's a thread for 280x: https://litecointalk.org/index.php?topic=12369.0

Unfortunately 270's don't seem to be prioritary...

Instead, if this is becoming frustrating, I suggest you mine a non-scrypt coin like: http://max.1gh.com/

[lethysek]

cgminer.exe --scrypt -o stratum+tcp://pool.com -u worker -p pass  -I 18 -w 256 -g 1 --thread-concurrency 24000 --gpu-fan 85 --lookup-gap 2 --gpu-engine 1120 --gpu-memclock 1500 --gpu-powertune 20

330 kh/s on this conf

I think that it is not a problem of cgminer configuration, because I tried a lot of this and always hash rate is similar.

Problem is propably somewhere else, but the question is where?  

The problem is actually known: VRAM latency. There's a thread for 280x: https://litecointalk.org/index.php?topic=12369.0

Unfortunately 270's don't seem to be prioritary...

Instead, if this is becoming frustrating, I suggest you mine a non-scrypt coin like: http://max.1gh.com/

Damn, best coins are scrypt.

At least I know what is a problem, but is there any way to fix this?? So why other ppl dont have this problem with 270X?

[alexipeck]

I'm not sure how much has been changed, but i've got an XFX R9 270x and i'm getting about 391Mh/s compared to what you're getting with Kh/s?

[giveen]

I'm not sure how much has been changed, but i've got an XFX R9 270x and i'm getting about 391Mh/s compared to what you're getting with Kh/s?

You forgot to enable the --scrypt option



OP:
Download sgminer and use this. I own XFX 270X's and get around 430KH/s each.

Code:

--xintensity 4 -w 256 --lookup-gap 2 -g 2 --thread-concurrency 8193 --gpu-engine 1050 --gpu-memclock 1450 --expiry 1 --queue 0 --scan-time 1 --gpu-powertune 10