Topic: 7950 only 290kh/s. What's wrong? (thread concurrency:8960 max) (Read 1624 times)
oh I forgat to mention I already did so. Hence those lines are not the issue, thx anyway, cheers.
February 01, 2014, 05:59:19 AM
Sounds like the classic problem where you have forgotten to add the following commands to the bat-file:
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECT 1
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECT 1
February 01, 2014, 05:17:10 AM
thx guys, I will upgrade to 4gb ram then. It will take a few days to do so and I will let you know if the issue is solved. Meanwhile, I will install and try on an ubuntu, as the ram requirement is said to be less.
Quote
cgminer versions 2.11.3 and up can be used to mine with high thread concurrencies now. Follow these instructions:
WINDOWS: Open console and type
Code:
setx GPU_MAX_ALLOC_PERCENT 100
Now, close the console (it will not work if you open cgminer in the same window). Open cgminer using a .bat or a new console, high thread concurrencies will now work.
LINUX: Open terminal and type
Code:
export GPU_MAX_ALLOC_PERCENT=100
Now high thread concurrencies should work in cgminer.
WINDOWS: Open console and type
Code:
setx GPU_MAX_ALLOC_PERCENT 100
Now, close the console (it will not work if you open cgminer in the same window). Open cgminer using a .bat or a new console, high thread concurrencies will now work.
LINUX: Open terminal and type
Code:
export GPU_MAX_ALLOC_PERCENT=100
Now high thread concurrencies should work in cgminer.
From: https://bitcointalksearch.org/topic/m.1256502
cgminer --scrypt -w 256 -v 1 -I 20 -g 1 -l 1 -T --thread-concurrency 21712
voltage - 1087
core - 1050
memory - 1500
I do not have Sapphire, but this gives me 630 kh/s on my 7950s. (MSI)
First of all, I run 7970s and 7950s on computers with PCI-E 1.1 from 2006-2007, no problem getting them up to 620/740 KH/s.
For the 7950 -I 18-20 and -g 1, is the way to go, but I think you might be getting HW errors because on the 7950 you
need more TC than 8xxx or such. All the 7950 I know of runs a TC of 16384 - 24000, that is usually their best range. But for that higher TC you need 3-4 GB of RAM and Win 7 64 Bit.
For the 7950 -I 18-20 and -g 1, is the way to go, but I think you might be getting HW errors because on the 7950 you
need more TC than 8xxx or such. All the 7950 I know of runs a TC of 16384 - 24000, that is usually their best range. But for that higher TC you need 3-4 GB of RAM and Win 7 64 Bit.
cheers to all. Trying to set up mining configuration for my newly bought sapphire 7950. I installed latest AMD Catalyst 13.11 Beta9.5 driver for my win7 along with app slk drivers. Well I read the scrypt readme of cgminer and I suppose I did everything correctly.
I allowed cgminer decide on the thread concurrency and I read the parameter from the .bin file created. It is 8960 (yes, this low). Intensity above 13 results in hardware errors. -g 2 does not work either. The parameters that work for people for 7950 on mining hardware comparison do not work for me at all. The thread-concurrencies that are a multiple of my shaders does no help either. Highest tc I can get is 8960. I am driving mad. Running;
"cgminer --scrypt -o poolhttp:8888 -u user -p pass -I 13 -g 1 --thread-concurrency 8960" with a .bat file (no config file) and getting around 290kh/s and that's the best I can get
The only possible reason I am left with is that my system ram is 2gb only and my mainboard is quite old (like 4 years or so) and it supports PCI-E 1.1. Do you guys think that PCI-E version is capable of causing this kind of a problem?
I read at https://bitcointalksearch.org/topic/mining-with-pci-express-30-videocards-on-pci-express-20-motherboard-273432 that it should not matter. So I am left out with no solutions. 
I allowed cgminer decide on the thread concurrency and I read the parameter from the .bin file created. It is 8960 (yes, this low). Intensity above 13 results in hardware errors. -g 2 does not work either. The parameters that work for people for 7950 on mining hardware comparison do not work for me at all. The thread-concurrencies that are a multiple of my shaders does no help either. Highest tc I can get is 8960. I am driving mad. Running;
"cgminer --scrypt -o poolhttp:8888 -u user -p pass -I 13 -g 1 --thread-concurrency 8960" with a .bat file (no config file) and getting around 290kh/s and that's the best I can get
The only possible reason I am left with is that my system ram is 2gb only and my mainboard is quite old (like 4 years or so) and it supports PCI-E 1.1. Do you guys think that PCI-E version is capable of causing this kind of a problem?
I read at https://bitcointalksearch.org/topic/mining-with-pci-express-30-videocards-on-pci-express-20-motherboard-273432 that it should not matter. So I am left out with no solutions. Jump to: