3x 5870 avg ~1050MH/s normal?

[fankih]

Hey,

I'd like to know if this speed is normal with 3x 5870's. I've got them all at 1.0v and engine clocks are 865, 840, 860 mems 300MHz all.

This is how my cgminer looks like:

Code:

 cgminer version 2.7.4 - Started: [2012-09-16 21:13:14]
--------------------------------------------------------------------------------
 (5s):1021.8 (avg):1038.4 Mh/s | Q:42  A:49  R:3  HW:0  E:117%  U:11.8/m
 TQ: 0  ST: 7  SS: 0  DW: 11  NB: 2  LW: 98  GF: 2  RF: 0  WU: 13.0
 Connected to http://gpumax.com:8332 with LP as user xxxxxxxxxxx
 Block: 0000037ccdb444aa9cd797ddd74fcac7...  Started: [21:16:30]
--------------------------------------------------------------------------------
 [P]ool management [G]PU management [S]ettings [D]isplay options [Q]uit
 GPU 0:  70.0C 2004RPM | 356.2/358.5Mh/s | A:17 R:0 HW:0 U: 4.10/m I: 9
 GPU 1:  76.0C 2104RPM | 346.3/347.6Mh/s | A:22 R:1 HW:0 U: 5.31/m I: 9
 GPU 2:  75.5C 1914RPM | 352.8/352.8Mh/s | A:12 R:2 HW:0 U: 2.90/m I: 9
--------------------------------------------------------------------------------

 [2012-09-16 21:16:50] Accepted dd7160e8.d8abe992 GPU 1 pool 0
 [2012-09-16 21:16:53] Accepted f8172046.5304864a GPU 1 pool 0
 [2012-09-16 21:16:54] Accepted 577189d3.2fd727ed GPU 1 pool 0
 [2012-09-16 21:16:55] Accepted a38a8a97.c7919796 GPU 0 pool 0
 [2012-09-16 21:17:11] Accepted 53514969.622c0e42 GPU 1 pool 0
 [2012-09-16 21:17:12] Accepted b18bbec9.af9f972d GPU 0 pool 0
 [2012-09-16 21:17:13] Accepted cb408003.a31cb4e1 GPU 1 pool 0
 [2012-09-16 21:17:18] Accepted bed9332d.dce16009 GPU 1 pool 0
 [2012-09-16 21:17:19] Accepted 2384ce5b.4429a834 GPU 2 pool 0
 [2012-09-16 21:17:24] Accepted d88f20b2.9c88f407 GPU 2 pool 0
 [2012-09-16 21:17:24] Accepted 5c0c3b89.b2a71d4c GPU 1 pool 0

I'm using Win7 64bit and latest 12.8 drivers. Should I change SDK to 2.1?

[monstrs]

Idont know if thats normal, pretty low scores actualy.

I got 2 HD 5870, both 980/300, catalyst 11.11c, got 450 MH/s per card, total speed ~ 900Mh/s.
So beter clock those babies, there is no reason to downclock them at current BTC price.

[fankih]

I must use undervolt because of high price of electricity in Finland. I will profit more by doing that, but I'd like to get max Mhash with those clock rates that I'm using.

-fankih-

[monstrs]

How much do you pay for electricity?

I thought so for a wile too, but when i actualy calculated, it appeared that even with one card in system (HD7970) all system drawing 360W, i am good to overclock as far as i can, if market priceis bigger thant 8$ and my electricity costs ~ 0.27 cents per watt. So calculate that correctly, i am sure, that for today price it is reasonable for you to push from those cards every juice they have

[crazyates]

You should be getting better MH/s with those cards at those core speeds. I'd say if you're using 12.8, you're also using SDK 2.7, which has crap performance on those 5xxx cards. You can switch to either 2.1 or 2.5 (I used 2.5), and either one will bring you closer to 400MH/s per card.

IIRC, a combination of SDK 2.5, mem of 300, and worksize of 256 worked exceptionally well. For 2.1, you might be better off with worksize of 128 and a lower memory (160-170).

[ssateneth]

Those are very low hashrates for those clock speed.

Install 2.1 SDK, verify the 2.1 SDK is installed, and make sure to select the platform when booting up cgminer with the "gpu-platform" command (first platform is 0. 2.1 will likely be platform 1). Also use phatk kernel, worksize 128, and vectors 2. Lastly, you said engine clocks are 865, 840, 860. Use these memory speeds in respective order. 173, 168, 172. You should get 401, 389, and 399 mhash respectively.

[fankih]

Thank you for the answers. I will try SDK 2.1 today and 2.5 so see which would be the best.

-fankih-

[Ashitank]

Just to give a comparison my 3 x 5850 give me 1156 MH/S on Cat 12.1 & SDK 2.1.

[hahahafr]

So if I understand correctly, the SDK 2.1 gives best performance for a 5870, but what about the driver version?

Those are very low hashrates for those clock speed.

Install 2.1 SDK, verify the 2.1 SDK is installed, and make sure to select the platform when booting up cgminer with the "gpu-platform" command (first platform is 0. 2.1 will likely be platform 1). Also use phatk kernel, worksize 128, and vectors 2. Lastly, you said engine clocks are 865, 840, 860. Use these memory speeds in respective order. 173, 168, 172. You should get 401, 389, and 399 mhash respectively.

How do you come up with such strange memory values?

[segabtc]

SDK 2.1 will do better for 58xx series. 5830,5850,5870 Got 5 x 5830 pushing almost 1.6 gig, 5 x 5850 almost 2.0 gig and 3 x 5970 little over 2.3 gig.
The odd mem speeds are a ratio based on core and mem speed (i believe). driver 11.10 is the one i use, i think.

[SysRun]

1050 is fine. Just get ready to sell them on ebay. None of this will matter in 6 months provided BFL delivers.

[crazyates]

1050 is fine.

It's not fine, tho. He should be >1200Mh/s.

[fankih]

I put 2.1 SDK and 12.1 drivers and got those running 1200MH/s with 855/875/850 clocks and 1v on every card.
855 ~392
875 ~400+
850 ~388

But yes I'm going to sell all of them when ASIC's comes out.

[ssateneth]

So if I understand correctly, the SDK 2.1 gives best performance for a 5870, but what about the driver version?

Those are very low hashrates for those clock speed.

Install 2.1 SDK, verify the 2.1 SDK is installed, and make sure to select the platform when booting up cgminer with the "gpu-platform" command (first platform is 0. 2.1 will likely be platform 1). Also use phatk kernel, worksize 128, and vectors 2. Lastly, you said engine clocks are 865, 840, 860. Use these memory speeds in respective order. 173, 168, 172. You should get 401, 389, and 399 mhash respectively.

How do you come up with such strange memory values?

Quite simply I brute forced every reasonable memory frequency for every multiple of 5 core frequency between 675 to 1050. I plugged in the best hashrates and memory speed per core speed into my handy dandy TI-82 and got equations, and voila.

[fankih]

The memory I'm running those atm is 180MHz. Would it actually change anything to drop down those few MHz more?
Very minor saving in power and heat, nothing more?

[hahahafr]

I'm actually struggling installing/downgrading to sdk 2.1 and 11.12 from 12.8 and sdk 2.7 under W7 x64. CGMiner 2.7.5 didn't like the sdk 2.1 and said that no devices was found/usable <opencl sdk not installed> even though 2 lines before it lists the sdk.

[hahahafr]

I put 2.1 SDK and 12.1 drivers and got those running 1200MH/s with 855/875/850 clocks and 1v on every card.
855 ~392
875 ~400+
850 ~388

But yes I'm going to sell all of them when ASIC's comes out.

Can you tell me how exactly you downgraded to 12.1/2.1? Did you do some tricks or something?

[segabtc]

I'm actually struggling installing/downgrading to sdk 2.1 and 11.12 from 12.8 and sdk 2.7 under W7 x64. CGMiner 2.7.5 didn't like the sdk 2.1 and said that no devices was found/usable <opencl sdk not installed> even though 2 lines before it lists the sdk.

try grabbing cgminer 2.5.0 and see what happens. The newer miners work better with the new hardware 79xx series. Older miners are better with older software.

5830 = 950c/300m/1.05v = 315mhs
5850 = 925c/300m/1.05v = 385mhs
5970 =  805c/300m/1.05v = 375mhs/core 750 total
6870 = 950c/850m/1.162v = 297mhs newer sdk and driver-2.4, 12.1 i think that is what this one is set at

[crazyates]

try grabbing cgminer 2.5.0 and see what happens. The newer miners work better with the new hardware 79xx series. Older miners are better with older software.

Where did you read that? I've never heard of that, and I've always used the newest CGMiner. Actually the newer miners should run more efficient, and actually give better results.

[fankih]

I'm actually struggling installing/downgrading to sdk 2.1 and 11.12 from 12.8 and sdk 2.7 under W7 x64. CGMiner 2.7.5 didn't like the sdk 2.1 and said that no devices was found/usable <opencl sdk not installed> even though 2 lines before it lists the sdk.

I had some similar problems but after I cleaned my comp out of all ATI-drivers I managed to get it working

-fankih-