GUIMiner shows 600Mh/s / SGMiner shows 600Kh/s?

[bobrottenchild]

Hi,

I just started to mine bitcoins as a hobby and to learn the inner workings of the currency and I have a few noob questions:

1) GUIMiner shows that I'm mining at 620+Mh/s http://d.pr/i/kLCC and when I run SGMiner it says about the same hashrate but in Kh/s http://d.pr/i/5oaW is it normal? I am under the impression that GUIMiner doesn't show the right format (shows Mh/s but could it be a UI bug and mean Kh/s instead?)

2) I'm trying to mine for fun with an AMD GPU but no matter what I do I get over 80c temperatures. My GPU is dirty a little but is in a well ventilated place so I guess it shouldn't go as much as 90C but then again it is.

3) Any tips on tweaking CGMiner to obtain a reasonable output without burning through my rig?

Thanks!

[bobrottenchild]

Here's my current conf:

Code:

{
"pools" : [
	{
...
	}
],
"intensity" : "11",  
"vectors" : "1",  
"worksize" : "256",  
"kernel" : "scrypt",  
"thread-concurrency" : "8192",  
"lookup-gap" : "2",  
"gpu-engine" : "1030",  
"gpu-fan" : "40-100",  
"gpu-memclock" : "1495",  
"gpu-powertune" : "20",  
"shaders" : "2048",  
"gpu-vddc" : "1.087",  
"temp-cutoff" : "99",  
"temp-overheat" : "95",  
"temp-target" : "67",  
"gpu-threads" : "2",  
"no-pool-disable" : true,  
"no-submit-stale" : true,  
"queue" : "1",  
"scan-time" : "6",  
"expiry" : "60",  
"auto-fan" : true,  
"scrypt" : true,  
"kernel-path" : "/usr/local/bin"  
}

11 of intensity seems to be the sweetspot to keep my GPU cool enough. I'm at about 400Kh/s.

Suggestions are welcome, thanks!

[Amph]

it's probably because guiminer is set to mine sha256 and not scrypt, the other one sgminer is indicating the correct value

if you can tell me what amd card do you have, then i could help you with intensity, usually for 280x you need 13, which is the best spot, and for 290/290x it's better to rise it to 19-20

[bobrottenchild]

it's probably because guiminer is set to mine sha256 and not scrypt, the other one sgminer is indicating the correct value

if you can tell me what amd card do you have, then i could help you with intensity, usually for 280x you need 13, which is the best spot, and for 290/290x it's better to rise it to 19-20

Oh I see, I'll try to set it to scrypt and see what it says!

EDIT: I don't see any settings to switch from sha256 to scrypt, any idea?

Thanks for your reply, I have a Gigabyte AMD Radeon R9 280x right now.

[Amph]

it's probably because guiminer is set to mine sha256 and not scrypt, the other one sgminer is indicating the correct value

if you can tell me what amd card do you have, then i could help you with intensity, usually for 280x you need 13, which is the best spot, and for 290/290x it's better to rise it to 19-20

Oh I see, I'll try to set it to scrypt and see what it says!

EDIT: I don't see any settings to switch from sha256 to scrypt, any idea?

Thanks for your reply, I have a Gigabyte AMD Radeon R9 280x right now.

i remembered now that there is a fork for it to run scrypt, you probably downloaded the version which run only sha256

do you have this https://bitcointalk.org/index.php?topic=150331.0?

[bobrottenchild]

Woah I now get 100-200khash/s more than before with sgminer!

And it indeed shows khash/s instead of Mh/s so I guess it's doing the right thing now.

I selected my 280x in the gpu defaults and the defaults really helped.

So now I'll be looking for a pool! Thanks a lot for your help!

[sandpaper]

Mining scrypt with a gpu isn't the best option in terms of profitability. Take a look at http://cryp.today/
 Should help

[bobrottenchild]

Mining scrypt with a gpu isn't the best option in terms of profitability. Take a look at http://cryp.today/
 Should help

When I look at cryp.today I am always wondering:

1) it shows that MiningRigRentals pays way more for X11/X13 than anything else. When I went on their website I didn't find any way to get started and mine for them. Am I missing something?

2) You told me that mining with GPU isn't the best option, would you mean I'd rather mine something else? (I agree and am mining X11 atm) or do you imply I should rent rigs? Could that be more profitable?

Please point me in the right direction. Right now I'm mining X11 on Nicehash and so far it's the most profitable I've got.

Thanks!

[silversurfer1958]

My BFGMiner does this sometimes too, I'm using a 1.3MH Zeus miner and it told me I was currently earning 53.7 Btc/Hr 
Now I've realised this isn't true, I've had to cancel my round the world cruise and purchase of an Aston Martin