Sapphire radeon 6670

[Pasky08]

hey guys I have recently built a new gaming pc.  It's not the best rig but it is pretty quick. I have 2 sapphire radeon HD6670's. I set up the mining and they only get as high as around 80,000 khash/sec.  Am I doing something wrong or is this all these cards are capable of in regards to hashing?  It seems as though my numbers should be higher by the looks of these forums....any help? Also the hash speeds are really all over the map sometimes going as low as 3,000...at this rate I'm wasting my time, I'd rather be playing games LoL!  Any help would be greatly appreciated I wouldn't mind putting my computer to work even if I get one block I would be happy with the 50 BTC :-)

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[Genrobo]

You should be getting about 80Mh/s each for 6670's, that seems like the right numbers to me.

You could try adjusting the settings in your miner or overclocking with MSI Afterburner to increase your speeds.
What OS and which miner do you use?

[Pasky08]

I use poclbm miner and windows 7.  I tried overclocking a bit in the catalyst control center but it had little effect.

[Genrobo]

If you're using poclbm on Windows 7 with those series ATI cards...
-v -w 128
Try those flags out if you're not using them already.
Afterburner can let you overclock further than AMD overdrive will.
Are you using AMD Stream SDK 2.4?

[Pasky08]

I tried the flags and it seems to go a bit faster i'm at around 100k now.  No I have not installed the sdk, should I?

[Genrobo]

If you're mining with AMD cards you should have the Stream SDK installed already.
2.4 is the latest version, that and version 2.1 are the best for mining, so I've heard.

With MSI Afterburner, you could probably push those cards enough to get 110-120 Mh/s each out of them.
If you join a decent pool, you'll make about 3/4 of a BTC per day probably.
I don't do those calculations with any precision though.
The other guy's on this board have excel spreadsheets, etc... etc...
I'm a rounding guy myself.
I do it in my head and guess the rest.

[Pasky08]

when i read the threads about the stream SDK I sort of came the the conclusion that I didn't need to install because my drivers already have openCL support.  I'm not sure if I have the SDK installed currently.  My cards are AMD cards so I'm not sure what else to do except overclocking.  But can overclocking my cards get me 10x the speeds?  That doesn't seem right.  I would also wish to avoid overclocking as I don't really want to damage my equipment. 

[Genrobo]

Not 10x the speeds.
100,000 Kh/s = 100 Mh/s

So you'd be getting 10-20% more.

If you don't want to overclock that's cool.
I personally am overclocking my 5830's.
Put me from about 220 Mh/s at stock speeds, all the way up to 285 Mh/s

The stock speed was 800 Mhz
I overclocked them to 975 Mhz
I didn't even play with voltages, not that you even can with 5830's

[Pasky08]

Yeah exactly my point.  You say I should get at least around 80 Mh/s when I am only getting 100,000kh/s.  A 10-20% increase means nothing in solving my issue.  It is more of something I would think about doing later on.  For now I'd like to at least get speeds fast enough to generate some BTC within the next couple of months lol.

[Genrobo]

Yeah exactly my point.  You say I should get at least around 80 Mh/s when I am only getting 100,000kh/s.  A 10-20% increase means nothing in solving my issue.  It is more of something I would think about doing later on.  For now I'd like to at least get speeds fast enough to generate some BTC within the next couple of months lol.

80 Mh/s = 80,000 Kh/s
If you're getting 100,000 Kh/s then you're getting 100 Mh/s

I take it you're not that good with metric conversions?

[Pasky08]

dude i was just looking up on this I'm retarded sorry for that so currently I'm getting 113 Mh/s not bad I guess.  For some reason I was thinking there is 1,000,000 kh/s in 1Mh/s and I thought the miner would change the unit when it is in the Mhash range.  My bad.  Thanks for your help anyways man!  I appreciate it!

[Genrobo]

Ah, sorry about that, I'm not too good at explaining those sorts of things on the first try.

But yeah, a 5670 gets about 80 Mh/s and the 6670 is supposed to be the 5670's big brother, so if you're getting over 100 Mh/s you're doing quite well with that card.

I don't know how well a 6670 overclocks, but if it's anything like my card, then you can squeeze some more performance out of it via MSI Afterburner, if you use the unlocked mode.

However, it does come with a risk, and ultimately lowers the life span of your GPU.
If you don't want to try it out, I understand completely.
Best of luck mining, with the setup you have, you'd be best off in a pool IMO.

[Pasky08]

I overclocked using catalyst to 900 mhz and cranked fans to max.  They are running at around 52 degrees currently which seems pretty cool in comparison to others on this forum.  I think I'm happy with this setup I don't wish to overclock any further.

Yes I'm just now considering joining a pool since it seems that I won't solve a block for at least another 2 months, using these online calculators available.  Can you recommend any good ones? Do you mine in a pool?

[grue]

But yeah, a 5670 gets about 80 Mh/s and the 6670 is supposed to be the 5670's big brother, so if you're getting over 100 Mh/s you're doing quite well with that card.

uh, no.

due to AMD/ATI's messed up naming scheme. the 6xxx cards have their second digit increased by 1. so a 6870 is comparable to a 5770, NOT a 5870

[IlbiStarz]

If you're mining with AMD cards you should have the Stream SDK installed already.
2.4 is the latest version, that and version 2.1 are the best for mining, so I've heard.

With MSI Afterburner, you could probably push those cards enough to get 110-120 Mh/s each out of them.
If you join a decent pool, you'll make about 3/4 of a BTC per day probably.
I don't do those calculations with any precision though.
The other guy's on this board have excel spreadsheets, etc... etc...
I'm a rounding guy myself.
I do it in my head and guess the rest.

Uhh no...?
He is about 200mh/s right now. That would only earn him 0.42BTC per day using deepbit's calculator. I'm at 2gh/s and I get 4.5 a day, there's no way he could get 3/4.

[Genrobo]

But yeah, a 5670 gets about 80 Mh/s and the 6670 is supposed to be the 5670's big brother, so if you're getting over 100 Mh/s you're doing quite well with that card.

uh, no.

due to AMD/ATI's messed up naming scheme. the 6xxx cards have their second digit increased by 1. so a 6870 is comparable to a 5770, NOT a 5870

That's just the higher end Barts cards.

The 6670 is an improved 5670 in essence.

5670 stats:
Core Config: 400:20:8
Core Clock: 775 Mhz
Bandwidth: 64 Gb/s
GFlops: 620
TDP: 64w

6670 stats:
Core config: 480:24:8
Core Clock: 800 Mhz
Bandwidth: 64 Gb/s
Gflops: 768
TDP: 66w

See? It's pretty much the 5670's big brother.

[Genrobo]

If you're mining with AMD cards you should have the Stream SDK installed already.
2.4 is the latest version, that and version 2.1 are the best for mining, so I've heard.

With MSI Afterburner, you could probably push those cards enough to get 110-120 Mh/s each out of them.
If you join a decent pool, you'll make about 3/4 of a BTC per day probably.
I don't do those calculations with any precision though.
The other guy's on this board have excel spreadsheets, etc... etc...
I'm a rounding guy myself.
I do it in my head and guess the rest.

Uhh no...?
He is about 200mh/s right now. That would only earn him 0.42BTC per day using deepbit's calculator. I'm at 2gh/s and I get 4.5 a day, there's no way he could get 3/4.

Deepbit's calculator, eh?
Well I prefer feeless pools myself.
Like I said though, I didn't calculate crap.
I guesstimated those numbers in my head.
Forgive me for being a little off. ;p

[grue]

uh, no.

due to AMD/ATI's messed up naming scheme. the 6xxx cards have their second digit increased by 1. so a 6870 is comparable to a 5770, NOT a 5870

That's just the higher end Barts cards.

The 6670 is an improved 5670 in essence.

I see. Thanks for the correction

[Pasky08]

ok, so where in these forums can i find some discussion about the different mining pools out there I would like to make a decision on joining one.  Or perhaps we can discuss some options here.  It seems like deepbit is a popular option.

[Genrobo]

ok, so where in these forums can i find some discussion about the different mining pools out there I would like to make a decision on joining one.  Or perhaps we can discuss some options here.  It seems like deepbit is a popular option.

If you look through the mining board, each of the major mining pools has a post.

deepbit has fees, though it's the most popular due to ease of use probably.
bitcoinwatch.com has a little pie chart that lists the most popular pools.

When I'm not solo mining, I'm using btcguild myself right now, and deepbit is my backup pool.