Author Topic: Expected hashrate for 7950/7970  (Read 81363 times)

Offline PandaMiner

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Re: Expected hashrate for 7950/7970
« Reply #15 on: October 01, 2012, 04:36:02 AM »
Okay, I helped you out in BTC-e chat.  You need to turn off MSI Afterburner and do it manually from within cgMiner. Also, you might consider downgrading the driver from 12.8 to 11.x if you can find a legacy driver.

You might be getting HW errors above intensity 13 due to MSI, who knows. 

Most conversions you see out there from bitcoin mining to litecoin mining (700Mh/s = 700Kh/s) are quoted in intensity 16 or above. Your mileage may vary.

Good Luck
~Dave~

Offline DiCE1904

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Re: Expected hashrate for 7950/7970
« Reply #16 on: October 20, 2012, 04:07:10 AM »
cgminer --scrypt -o http://notroll.in:6332 -u thitha2907.1 -p 12345 --shaders 2048 --intensity 13 --worksize 256 -g 1

have you tried -g 2  ?

Offline crazyearner

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Re: Expected hashrate for 7950/7970
« Reply #17 on: October 21, 2012, 01:07:18 AM »
heres my cgminer bat config with AUTO and also OC

Normal rules and no OC

color 04
cgminer -o http://addownurl.com -u xxxxx -p 123 -I 9 --auto-fan --auto-gpu --gpu-memclock 300

Am pulling anywhere between 380 to 420


Same one as above however OC



cgminer --scrypt -o http://addownurl.com -u xxxxx .w1 -p 123 --shaders 1600 --intensity 14 --worksize 256 -g 1 --gpu-engine 880 --gpu-memclock 1225

Speeds average out around 400 to 450 depending on I rates can change this around and play with settings but max I would turn to is 13  to 14 depending no temps cards running at anything above 18 ull crash your system maybe fri your GPU too





My standard ATI card is gpu engine 850 and memclock1200

Card ATI 5870

Also take out --scrypt depending on some servers depending on what you are mining if Lite then leave in


Will post more settings when I messed around more
« Last Edit: October 21, 2012, 01:45:25 AM by crazyearner »

Offline badonkadonk

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Re: Expected hashrate for 7950/7970
« Reply #18 on: October 21, 2012, 03:49:49 AM »
7950 @ 1175/1775 1150 core voltage. ~80c shows ~650kh in reaper, ~637kh on pool-x with 2-3% stale...

worksize 256
vectors 1
aggression 20
threads_per_gpu 1
sharethreads 32
lookup_gap 2
gpu_thread_concurrency 24576

Offline vindimy

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Re: Expected hashrate for 7950/7970
« Reply #19 on: March 03, 2013, 09:25:58 AM »
7950 @ 1175/1775 1150 core voltage. ~80c shows ~650kh in reaper, ~637kh on pool-x with 2-3% stale...

worksize 256
vectors 1
aggression 20
threads_per_gpu 1
sharethreads 32
lookup_gap 2
gpu_thread_concurrency 24576

I've got these exact settings on my Gigabyte AMD Radeon HD 7950 3GB GDDR5 with latest AMD drivers (12.10.17-130215a-153345E-ATI). I'm on Windows 7 64-bit with 16 GB of RAM and Core i5 CPU.

When it works, it gives me about 570 kH/s (compared with 320 kH/s I'm getting with cgminer), that's great.

The issue is that graphics card keeps crashing ("Driver stopped responding"), after 10-15 minutes of running reaper (13 beta4 64-bit).

So far I've tried upping the power from 5% to 20% and CPU/MEM to 1175/1175 (can't change voltage unfortunately). That didn't help at all, so I'll run it on factory defaults (0 power/1000 CPU/1250 MEM) for now.

Any ideas what might be a way to solve this?
« Last Edit: March 03, 2013, 09:42:38 AM by vindimy »

Offline Magnate

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Re: Expected hashrate for 7950/7970
« Reply #20 on: March 03, 2013, 11:16:30 AM »
from what I've seen reported, reaper works best for 7XXX cards, and you want to run GPU at ~0.7 of the memory speed. Means you aren't running the GPU as hard and shouldn't crash as much either.

this is listed on the hardware table
https://github.com/litecoin-project/litecoin/wiki/Mining-hardware-comparison
7950    550mhs        GPU 1000 MHz    MEM 1450 MHz    Reaper v13 Beta 4    @ 256 Worksize @ vectors 1 @ Aggression 20 @ threads_per_gpu 1 @ sharethreads 32 @ lookup_gap 2 @ gpu_thread_concurrency 24576

aggression 20 seems pretty "aggressive", but the clock settings etc seem to follow the normal formula for this series of cards

Offline vindimy

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Re: Expected hashrate for 7950/7970
« Reply #21 on: March 03, 2013, 06:48:55 PM »
So far, with stock voltage, CPU, and memory clock, the card has been happily hamming at 580 kH/s :)

Offline ajareselde

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Re: Expected hashrate for 7950/7970
« Reply #22 on: March 03, 2013, 07:50:51 PM »
So far, with stock voltage, CPU, and memory clock, the card has been happily hamming at 580 kH/s :)

with what setup may i ask ?

i get top 550 no matter what i try, and ive tryed all i can think off.

cheers

Offline vindimy

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Re: Expected hashrate for 7950/7970
« Reply #23 on: March 03, 2013, 08:40:43 PM »
with what setup may i ask ?

i get top 550 no matter what i try, and ive tryed all i can think off.

cheers

I've posted my setup in this thread above, check it out :) I'll add that my motherboard is ASUS P8Z68-V PRO/GEN3 LGA 1155 Intel Z68.

It seems that especially with LTC mining, graphics card isn't the only thing affecting hashrate - things like (motherboard) CPU speed, (motherboard) RAM speed, which PCI slot card is connected (mine's connected to PCI express 3.0 x16) all affect end result.

I think chasing the last 5-10% hashrate increase isn't worth the time (been there), unless you have 10+ systems to improve.

Offline EFX

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Re: Expected hashrate for 7950/7970
« Reply #24 on: March 04, 2013, 02:44:13 PM »
You're underestimating the importance of the software environment and config variability.

There are no indications that scrypt mining puts any significant load on even a single pci lane. I've tested this myself across many machines and lane width settings and always end up with the same results.


The reason you often cannot run high aggression and high thread concurrency at the same time is because GCN has optimizations still to be done with regards to addressing and re-writing its large buffer. 13.2 is supposed to bring some of those optimizations.

  CPU speed also has nothing to do with it, even an atom could probably handle shares from several GPUs, at least. Very little data is being dealt with, just the completed share moved out to the pool. The GPU is doing all the math and randomly running a few reads to the secondary ddr3 system buffer.... Yes, even ddr2 yields the exact same results. 

 Focus on the software environment and config variability.  Currently, the cgminer 512MB buffer limitation (implemented for stability) will hold back 6970s/7950/70s. It's your decision: stability and features vs. raw hashing speed.

PandaMiner, downgrading to below 12.6 with a GCN card is not recommended or it may not work at all. Even 12.6 is pre-gcn.


I suggest everyone download the AMD cleanup utility if you're going to be upgrading/downgrading looking for optimal hashrates. Recently released, no need for manual driver cleaning or bloated 'driver sweepers', this does a far better job in a much smaller package.




 
« Last Edit: March 04, 2013, 03:09:23 PM by EFX »

Offline koalahauff

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Re: Expected hashrate for 7950/7970
« Reply #25 on: March 05, 2013, 12:50:47 AM »
if you cant get past 550kh/s with reaper and 7950/7970 make sure you have device 0 in the reaper.conf might be putting load on the cpu when you dont need too

Offline mrkeety

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Re: Expected hashrate for 7950/7970
« Reply #26 on: March 09, 2013, 04:45:20 PM »
7950 going 590 kh/s.

"worksize 256
vectors 1
aggression 20
threads_per_gpu 1
sharethreads 32
lookup_gap 2
gpu_thread_concurrency 24000"

"Power  limit 20%
Core Clock 1000mhz
Memory Clock 1575mhz"

Offline fullmetaldg

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Re: Expected hashrate for 7950/7970
« Reply #27 on: March 31, 2013, 06:25:51 AM »
So if i can help with this thread... this is my config on CGminer, i have 3 7970 runing at 620/630khs
--shaders 2048 --intensity 13  --worksize 256  --gpu-engine 1200 --gpu-memclock 1600 --thread-concurrency 8192
i can't get more intensity or thread-concurrency cause it starts to fail and down hashing 8(

Offline joesaiditstrue

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Re: Expected hashrate for 7950/7970
« Reply #28 on: April 08, 2013, 10:57:27 AM »
just wanted to give some useful info for 7970 hash rate settings for my first post
I have two 7970's on water.  I've found for these gpus it's best to use a ratio of .57:1 for engine:memory clocks

clocking at 1069:1875, worksize 256, gputhreads 1, intensity 20, thread concurrency 20992, my cards are doing about 700khash for GPU 1, and 685khash for GPU 2

specifying shaders lookup gap etc doesn't increase my hash rate using cgminer

Offline wedge22

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Re: Expected hashrate for 7950/7970
« Reply #29 on: April 09, 2013, 02:48:44 AM »
I am new to mining but not too PC hardware and so far I have achieved the following after only a couple of hours tweaking my settings.

Gigabyte OC Edition Stock (does not like to overclock) also its voltage locked.
7970 going 590 kh/s.

"worksize 256
vectors 1
aggression 218
threads_per_gpu 1
sharethreads 32
lookup_gap 0
gpu_thread_concurrency 22000"

I have a Gigabyte 7970 OC and its voltage locked and does NOT like to overclock at all which sucks.
"Power  limit 0%
Core Clock 1000mhz
Memory Clock 1350mhz
LTC LNDmLCVj95p4gaAfZb7cMyv7rNrBX4PbS6