Topic: Consolidated Litecoin Mining Guide for 5xxx, 6xxx, and 7xxx GPUs - page 27. (Read 624202 times)

Maybe must I try cgminer instead of reaper for my 7850?

Maxed my other card (Diamond 7970PE53G) out at ~615 Kh/s with the following settings:

Core clock: 890MHz
Memory clock: 1375 MHz

same cgminer config as above

It's amazing how small variations in core or memory clock (~5 MHz) can result in 100 Kh/s difference in speed..

Yes about the same.


Any thoughts on whether a win64 build would improve hash rates?

That's what I thought.  Does 8192 give you similar results to --shaders 2048?

GPU-Z is showing:

Memory Usage (dedicated): 0MB
Memory Usage (dynamic): 1508 MB

I can't run with thread-concurrency at 10240 on cgminer 2.11.2.  I get:

 [2013-03-13 23:44:16] Maximum buffer memory device 0 supports says 536870912
 [2013-03-13 23:44:16] Your scrypt settings come to 671088640
 [2013-03-13 23:44:16] Error -61: clCreateBuffer (padbuffer8), decrease CT or in
crease LG
 [2013-03-13 23:44:16] Failed to init GPU thread 0, disabling device 0
 [2013-03-13 23:44:16] Restarting the GPU from the menu will not fix this.
 [2013-03-13 23:44:16] Try restarting cgminer.

Ill give it a spin tomorrow with my 7950s and 6970s

Note I also improved on the kernel slightly too in the latest version.

These are great rates.  Can anyone tell me what the memory usage on card is?  A bug was recently fixed that allowed thread_concurrencies of >8192 but <12000 to be used in cgminer, so I'm curious as to what the thread concurrency actually is (probably either 8192 or 10240)

Can someone try --thread-concurrency 8192 and --thread-concurrency 10240 and see if they produce the same results? thanks.

core clock 1000
mem clock 1475
same setting as above

This is on a Gigabyte GV-R797OC-3GD

getting me ~680

Agreed, my hash rates in cgminer have always been higher than with reaper.

I finally broke 600 kH tonight, with the following settings:

core clock: 925
mem clock: 1450

"intensity" : "13",
"worksize" : "256",
"kernel" : "scrypt",
"lookup-gap" : "0",
"vectors" : "1",
"shaders" : "2048",
"gpu-dyninterval" : "7",
"gpu-platform" : "0",
"gpu-threads" : "2",

Anyone running a 7970... dont be affraid to try CGminer.  I just did and now not only can I take advantage of the efficiency advantages of startum, but its actually hashing FASTER then Reaper at the same settings.  (except for thread concurrency obviously)

So stoked!

Here's a screenshot:



My card is a Club 3D Radeon HD 7850 royalKing 1024Mb

Anybody got settings for a 6950.  I have a 3 card setup and trying all kinds of speeds but cant seem to go past 314 or so.  Stock 820/1250 yields 314kh per card with 7040 concurrency and I 18 (1408 shaders not unlocked one).  I'm using 12.10 drivers under Win 7 x64 cgminer.  I have 8GB of system RAM but I'm not seeing how others are getting 400-500.  Heat is also an issue with the cards hitting 84c even with 65% fan.

Reaper is working great on my 7950s - getting a stable 635kh.

i guess the 7970's use is not reaching 100% , does it?
if not just try to open a new cgminer (mining BTC) with a low intensity (4 or 5) and see if you got more hashrate in the LTC cgminer
or you may try to open a second LTC cgminer with same settings and see if the total hashrate is bigger

It comes with a good deal of overclocking and overvolting. On the right side of Afterburner you should see a little red dot.  You can click it and it will allow you to adjust core and memory voltage independently of one another.  BE VERY CAREFUL.  Small increases in voltage on your RAM can QUICKLY add LOTS of temp to your card if you do not have good cooling.

Unless your getting free or really cheap power this really should be more about efficiency then max hashrate.  Even at stock clocks I was pulling a ton of power, I can't imagine over volting.  When I reduced even down to just 1.025 I could drop over 200 watts across a 4 card rig.  That's huge.  Worry more about your kh/s per watt then your overall hashrate.  Again, this may change if you have free power or extremely cheap power.  But not many find themselves in this position.

The statement above about memory clocks not affecting hash rate are extremely incorrect.  Make sure you have afterburner setup correctly.  Use something like GPUz to confirm that you are actually changing the clocks.  Just watching afterburner display a different clock rate does not guarantee that you are really adjusting anything.  Just by the fact you believe that the memory clocks do not affect hash rate I can promise you that you are either 1) a troll or 2) do not have afterburner working correctly.  (add the dll's, disable ulps, oc mode = 2, etc, etc etc)

I switched over, but I'm still trying with cgminer. It seems to be working a bit better, but we'll see.

Connection problems, assumbly with the pool. By the time you submit the shares they are stale, but you are still mining them. Try my guiminer-scrypt and a stratum pool like ltcmine.ru.

So I've gotten all the settings figured out, and according to the hardware comparison chart, my two gpus are right around where they should be. But when I actually get to mining, I find that I don't get nearly the rewards I should when compared to my displayed hashrate and the calculated rewards. I also noticed that the "my account" page for the pools I mine at never displays more than ~1/6th my local hashrate. I'm not sure what's going on, but I just sat and watched cgminer for a few minutes and noticed for about a minute, there was a "an error communicating with pool 0, work submissions are being cached." During this time, my local hashrate drops to ~ 10khash/sec, and the work just stops. I would assume this communication error is causing the low hashrates and rewards, but why is that error happening? I've got a good internet connection (25 own, 15 up), and I've never had issues when I mined bitcoins.

For anyone interested, running cgminer 2.11.2 on windows 7 64 bit. Amd Phenom II dual core and 4gb of ram. The mining cards are a 5850 and a 5830. Both are attached with 1x<->1x extenders.


I would greatly appreciate any and all input on this issue. Thanks in advance! If I get it working properly, I will tip in LTC!

-Chance

Edit for an update: Mining at litecoinpool.org, the stats on my miner have leveled out. Reporting 120khash/sec and my local is ~590-600khash. So I'm really losing out right now.

You should be able to see it in task manager.

What GPU are you using?

sometimes if certain things are running in the backround with hardware acceleration on, (youtube, flash, ect) the vid card will fail to switch from 2d to 3d mode and run "slow". Make sure the clocks match what you set them at to mine. (when this happens to me my card normally at 1050/1750 goes to 500/1200, and stays there till whatever was using it is closed)