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Bitcoin Discussion Thread Part 2

xfx pro 1050w for the following?

Intel Celeron G1610
MSI|B75A-G43 B75
2GB stick of DDR3
Sata HD
4x 7950's

Should I go for the 1200W?
 
Stock 7950s usually put out about 200w or slightly less loaded, so I think you would be fine with the 1050w with not a whole lot of room left over.
 
master noran said:
xfx pro 1050w for the following?

Intel Celeron G1610
MSI|B75A-G43 B75
2GB stick of DDR3
Sata HD
4x 7950's

Should I go for the 1200W?
Click to expand...

master noran,

Can you give us an update once you get it up and running? 2GB would be an interesting test.
On my boxes, 2x 7950s on a Athlon 4130 running CGMiner has 2GB allocated. 1x 7950 has 1.2GB allocated.

Code: 
PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
2136 mark      20   0 2163m  60m  31m S    4  0.8  54:02.02 cgminer
 
Can't get bloody OpenCL working on my AMD E-350 (it'll be slow as hell but I just wanted to test stuff). GPU-Z freezes during OpenCL detection, whether AMD's APP SDK is installed or not. GUIMiner also doesn't launch. :(
 
DragonQ said:
Can't get bloody OpenCL working on my AMD E-350 (it'll be slow as hell but I just wanted to test stuff). GPU-Z freezes during OpenCL detection, whether AMD's APP SDK is installed or not. GUIMiner also doesn't launch. :(
Click to expand...

Which driver and SDK are you using?
 
MarkE said:
master noran,

Can you give us an update once you get it up and running? 2GB would be an interesting test.
On my boxes, 2x 7950s on a Athlon 4130 running CGMiner has 2GB allocated. 1x 7950 has 1.2GB allocated.

Code: 
PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
2136 mark      20   0 2163m  60m  31m S    4  0.8  54:02.02 cgminer
Click to expand...


Does scrypt mining require more system ram or something? I've got 2 rigs mining with a mix of 5850/5830's, 4 on each with 2GB ram stick each.
 
DragonQ said:
Can't get bloody OpenCL working on my AMD E-350 (it'll be slow as hell but I just wanted to test stuff). GPU-Z freezes during OpenCL detection, whether AMD's APP SDK is installed or not. GUIMiner also doesn't launch. :(
Click to expand...

Dragon, i had this problem after monkeying around with different Catalyst driver versions.

I fixed it with a reformat and clean reinstall of the Cat. 13.1 / 2.8 SDK.
 
atp1916 said:
Not sure about cgminer, but each of my scrypt reaper miners are using over 2.1gb system ram each.
Click to expand...

For each card? I read something about needing more system ram when switching over to ltc from btc were you could mine with a 1GB stick no worries. Haven't had any issues with 2GB sticks and multiple 58XX series cards
 
Yeah, each card.

I'm using reaper, so i'm not sure if the correlation can be made to cgminer.

Thread_concurrency seems to have alot to do with how much system ram each of the miners uses. With 24576, it's 2.1gb+ per client.
 
atp1916 said:
Dragon, i had this problem after monkeying around with different Catalyst driver versions.

I fixed it with a reformat and clean reinstall of the Cat. 13.1 / 2.8 SDK.
Click to expand...
Well it's my home server, I can't reformat. I could try a complete uninstall/reinstall of the drivers but that'd require connecting it to a monitor, mouse and keyboard...effort. :(
 
travanx said:
People seemed pretty upset over the 25% taken from everyone. That didn't happen to you?
Click to expand...

That happened before i switched to them, but honestly why would you leave your stash with your pool? I withdraw each time i earn 1 coin.
 
note235 said:
oh much thanks

do you know if a molex one is needed or just a normal riser?
Click to expand...

i *think* the molex ones are for cards that don't have external power, so like a raid card/sound card, etc, since most gfx cards have external power, the non-molex ones work.

this isn't gospel, this is just what i remember from my research.
 
ohhh ok
time to get a few then lol

the one i need would be a 1x to 16x to connect a 7950 correct?
thanks!
 
If all you have on your board are x1, then that's what you want, x1 to x16.
 
master noran said:
For each card? I read something about needing more system ram when switching over to ltc from btc were you could mine with a 1GB stick no worries. Haven't had any issues with 2GB sticks and multiple 58XX series cards
Click to expand...

Sorry, I thought you were going to mine LTC. I'm not familiar with bitcoin mining but with litecoin, it requires a massive amount of threads (20k+) to get any speed out of the 7x cards (from my experience).

-Mark
 
MarkE said:
Sorry, I thought you were going to mine LTC. I'm not familiar with bitcoin mining but with litecoin, it requires a massive amount of threads (20k+) to get any speed out of the 7x cards (from my experience).

-Mark
Click to expand...

I am mining LTC, I did more reading and with reaper you need about 8gb system ram for 4 cards, but with cg miner which i'm using 2GB is fine since it uses the gpu memory.
 
A little help?

My desktop has a 7970 card in it, with WinXP-32. I got the Wallet, and loaded the AMD SDK, then tried to launch GUIminer. It does not "see" the graphics card, but it does see the CPU. I told it to look for OpenCL, to no avail.

What am I doing wrong?
 
Qinsp said:
A little help?

My desktop has a 7970 card in it, with WinXP-32. I got the Wallet, and loaded the AMD SDK, then tried to launch GUIminer. It does not "see" the graphics card, but it does see the CPU. I told it to look for OpenCL, to no avail.

What am I doing wrong?
Click to expand...

Which Cat. driver version are you using
 
Qinsp said:
A little help?

My desktop has a 7970 card in it, with WinXP-32. I got the Wallet, and loaded the AMD SDK, then tried to launch GUIminer. It does not "see" the graphics card, but it does see the CPU. I told it to look for OpenCL, to no avail.

What am I doing wrong?
Click to expand...

The AMD SDK is included in all current copies of the driver so you shouldn't have to install them separately. If you don't see the GPU, then my guess is that if you run GPU-z, then you will see that the OpenCL box is not ticked, which means something in your driver install is tiggered.

My suggestion is to run this - http://support.amd.com/us/gpudownload/windows/Pages/catalyst-uninstall-utility.aspx

And then reinstall the driver, which you should be able to then see OpenCL is ticked and you'll be good to go with guiminer.
 
Rats, that uninstall is Win7+

I have a hunch it's XP that's the issue. I need it for legacy apps that won't run in XP-mode emulation, so I can't change this box.

EDIT - Loaded drivers from 2011 including SDK, but no dice.
 
Last edited:
Fixed my AMD E-350's OpenCL support by totally reinstalling the GPU drivers, thanks for the advice guys.

Been doing some more research. Currently getting a pointless 8-9 MH/s on my E-350's GPU (after electricity costs this will earn me 50p this month if I'm lucky haha), plus 4 MH/s on my work machine (CPU only, on-board GPU doesn't support OpenCL).

I think the only way I can conceivably make a (small) profit from Bitcoin mining is to take my current home server to work (need to upgrade it soon anyway), then buy an HD 7970 to pair with it. I currently have no spare HDDs or cases though so I'd need to buy these also. Even with no electricity costs it'd still take 7 months at current rates to recoup the initial cost. If the difficulty increases faster than currently (which is likely), it'll take even longer. What a shambles! :)
 
I am trying to play around more with the cgminer.conf file. I have two 7950's. How do I set the file up to have each card for its own worker? Do I change something here?

Code: 
{
"pools" : [
	{
		"url" : "http://coinotron.com:3334",
		"user" : "travanx.1",
		"pass" : "1"
	}
]
 
travanx said:
I am trying to play around more with the cgminer.conf file. I have two 7950's. How do I set the file up to have each card for its own worker? Do I change something here?

Code: 
{
"pools" : [
	{
		"url" : "http://coinotron.com:3334",
		"user" : "travanx.1",
		"pass" : "1"
	}
]
Click to expand...

I think you'd need multiple instances of cgminer to get that going but I'm not sure if that's possible. Any reason why you want to do that? I just have it fail over when my primary pool goes down.
 
I have never used reaper but CGMiner is not memory intensive. I have x4 7950s running with only 8GB of RAM installed and total system memory usage is only 2.1GB.

Also, I was having hellish problems getting my system to work properly, kept getting ATIKMPAG.SYS BSODs as soon as something tried to access the video cards. I finally got it to work properly with 12.8 drivers, unfortunately, I only mine at a rate of about 510-520kh per card...ive seen people getting 600+ and im assuming that's driver enhancements allowing the higher hashrate. I've tried 13.1 and 13.3 drivers but they immediately cause the BSODs to return.
 
MarkE said:
I think you'd need multiple instances of cgminer to get that going but I'm not sure if that's possible. Any reason why you want to do that? I just have it fail over when my primary pool goes down.
Click to expand...

How would I adjust the .conf file to have a failover. I figured it would be nice to see what each card was producing. Seems like I lost a lot each time weminteltc.com went down for maintenance the last few days.
 
both of my 7970s are running 720kh/s+ per on cgminer with:

cgminer.exe --scrypt -o netcodepool.org:8337 -u xxxx -p xxxx -d 0 --thread-concurrency 8192 --shaders 2048 --intensity 13 --worksize 256 -g 2

Gigabyte 7970OCs @ 1000/1500

Grunt, you should be able to use the above and just change the shader count...
 
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