Mining Advice

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AnotherGuy

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Dec 9, 2003
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Hi.
I decided to try mining with my AMD 7850 2gb card and the system in my sig.
A few questions I have...

1. What coin is the most profitable to mine right now? Bitcoin, Litecoin or other?

2. How do I start start mining for that coin, like which software to download, what wallet, what miner and should I join a pool and which pool?

I did read a little about how to mine bitcoins and then I saw people saying that bitcoin is nomore efficient to mine with gpus, because of the ASICS availability, so I dont know what coin to do a research for anymore.
Any advice?
Sorry if posted in the wrong forum.
 
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nwo

Platinum Member
Jun 21, 2005
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A

AnotherGuy

Senior member
Dec 9, 2003
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Great info! Thats just what i was looking for.
If anyone else has another idea or opinion please feel free to post it.
 
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AnotherGuy

Senior member
Dec 9, 2003
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BTW should I start mining right away or wait for the first Wallet sync to complete? My wallet still says Synchronizing 80 weeks behind...

Also How do I lower the Temp of my vidcard HIS 7850 2GB, coz its at 91C right now? Is it done by lowering the difficulty or some setting in the cgminer script?
My script right now is --thread-concurrency 8192 --gpu-engine 860 --gpu-memclock 1200 -w 256 -I 17 -g 1
 
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nwo

Platinum Member
Jun 21, 2005
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AnotherGuy said:
BTW should I start mining right away or wait for the first Wallet sync to complete? My wallet still says Synchronizing 80 weeks behind...

Also How do I lower the Temp of my vidcard HIS 7850 2GB, coz its at 91C right now? Is it done by lowering the difficulty or some setting in the cgminer script?
My script right now is --thread-concurrency 8192 --gpu-engine 860 --gpu-memclock 1200 -w 256 -I 17 -g 1
Click to expand...

I'm not an expert for auto temp management so I don't know. But what I do to keep my temps down without sacrificing too much hashrate is: turn up the fan speed or undervolt the card.

I can't believe my XFX 7850 @ 1050/1300 runs cooler than your MSI 7850.... Your fan speed must be low because the HSF on MSI cards should be a lot better than the one on my XFX core edition (1GB).
 
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AnotherGuy

Senior member
Dec 9, 2003
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I dont have an MSI, I have HIS 7850 2GB at stock 860 core and 1200 memory. I never tried OCing it.
I changed the fan speed and lowered Intensity to 13 and now finally im at 87C wich is a little better, though my hash rate is down from 350 which was before to 275kh/s now.
My script now is --thread-concurrency 8192 --gpu-engine 860 --gpu-memclock 1200 -w 256 -I 13
NWO can u please post ur script since u have similar card?
 
N

nwo

Platinum Member
Jun 21, 2005
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AnotherGuy said:
I dont have an MSI, I have HIS 7850 2GB at stock 860 core and 1200 memory. I never tried OCing it.
I changed the fan speed and lowered Intensity to 13 and now finally im at 87C wich is a little better, though my hash rate is down from 350 which was before to 275kh/s now.
My script now is --thread-concurrency 8192 --gpu-engine 860 --gpu-memclock 1200 -w 256 -I 13
NWO can u please post ur script since u have similar card?
Click to expand...
Sorry, for whatever odd reason I misinterpreted your card for MSI.

I think I had TC set to 12k initially @ 18 intensity, -g 1 and -w 256. Someone PMed me a recommendation and I went with it. That yielded me the highest hashrates.

But if you were able to get 350 at stock clock speeds, that is pretty darn good for a 7850. I think mine gets only around 300 at stock speeds (860/1200). Have you tried changing the voltage on your card? That would help tremendously with the temps, and you could probably undervolt it quite a bit since 7850s have tons of OC potential.

I was able to get mine up to 1125/1450 stable for a few hours, or possibly even higher, but cg miner would crash. I also had it slightly overvolted (close to 1.2v), but the temps started reaching 90s so I took it back to stock voltage with a moderate OC because it wasn't worth the extra 30kH/s.

I now get about 360kH/s at stock voltage, 1050/1300 clock speeds, 80% fan speed, with temps in the 70s. I have to leave the case open though because my 5870 runs in the 90s with the fan speed at 100% and I can't undervolt it because it's locked :\
 
Attic

Attic

Diamond Member
Jan 9, 2010
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If you want solid hash and lower temps you'll need to get the cards on PCI express risers and away from each other.
 
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nwo

Platinum Member
Jun 21, 2005
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Attic said:
If you want solid hash and lower temps you'll need to get the cards on PCI express risers and away from each other.
Click to expand...

He only has 1 card from what I can tell. I highly doubt that putting them 1 slot further apart will make much difference :\
 
Attic

Attic

Diamond Member
Jan 9, 2010
4,282
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nwo said:
He only has 1 card from what I can tell. I highly doubt that putting them 1 slot further apart will make much difference :\
Click to expand...


Oh yep, on a quick read I was thinking he was working with dual 7850's.

Temp more of a problem/consideration if that's just one card. For single card you should be mid 70's at ~350Kh/s (TC 16000, Intensity 17 or 18). I'd imagine more airflow is needed through the case, but taking off the side panel is first thing i'd do if I was getting super high temps while mining.
 
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Torn Mind

Torn Mind

Lifer
Nov 25, 2012
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Mine Litecoin first, having some Litecoin is not a bad thing, as its exchange rate into Bitcoin is fairly stable, at around .03LTC/BTC.

Similar to nwo, I have a Sapphire 7850 that only gets around 300 Khashes at stock, so consider yourself lucky to have a golden specimen performance-wise. However, your temps are much more higher than mine. Something is wrong with the cooling system on your card; perhaps misapplied thermal paste is the culprit for yours...or the fan is not functioning properly. I don't think my card has even broken 75 at 68 degree Farenheit and enclosed in a cheap Powerspec TX-606 case I bought for $25.
 
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AnotherGuy

Senior member
Dec 9, 2003
678
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Maybe I threw the wrong numbers there not really hashing at 350, maybe 320 i cant remember, but my temps get to 91-92C, while on idle i have em at 44C. I cant undervolt right now with msi afterburner, will have to lower intensity maybe to lower my temps.

Update:
I cant lower my temps yet, still at 90C and hashing at around 280-305. Even with Intensity 13 I am still getting 90C temps. Im not comfortable leaving it on for long like this. I am afrid I will have to open the vidcard and apply some thermal paste myself. BTW I thought I had a HIS card, but after I checked its a Visiontek 7850 2gb. My previous 6850 was a HIS i forgot.
 
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KingFatty

KingFatty

Diamond Member
Dec 29, 2010
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It seems far more preferable to simply increase your fan speed to lower temperature?

Why reduce your mining performance by messing with other settings, when you can just crank up the fan and cool it more? Don't rely on auto fan, just set it to a speed manually, that is high enough to achieve the cooler temperature you prefer.
 
Attic

Attic

Diamond Member
Jan 9, 2010
4,282
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My 7850 at 950/1200 (core/mem) does ~350Kh/s with TC 16000 and intensity at 18. Stock volts. Temps not an issue on signle fan cooler and a lousy case.

I run it at 860/1200 at 267Kh/s with TC 16000 Intensity 13 and voltage 1.05 because it runs in my family room and I need it silent.

After 24hrs my WU in cgminer at the lower settings is 245. Highest % of hash rate i've seen on my miners.
 
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AnotherGuy

Senior member
Dec 9, 2003
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Fan is already set in MSI Afterburner to scale based on temps and its already running at 90% speed.
After opening my case its a little better now with I 13 at 82C temp and hash rate 275.
TC not touched at 8192.
 
Torn Mind

Torn Mind

Lifer
Nov 25, 2012
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I really now suspect that HIS botched the TIM application on the card or their cooler is simply insufficient. An intensity of 13 is really light if -g is only 1. That said, if your unit is under warranty, removing the cooling assembly is a no-no if you want to keep it. If it is not, then you can go on right ahead and check it out.
 
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