low has w/ r9 280 compared to 6950

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Orddie

2[H]4U
Joined
Dec 20, 2010
Messages
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Hey all,

using -I 13 -g 2 -w 256 --thread-concurrency 8192 for cgiminer 3.7.2 for mining LTC

cgi miner says it's doing 442 average. the same version of software running the 6950 average is 395 but it's settings are -I 18 -g 1 -w 256 -l 1 --thread-concurrency 6144

i was expecting closer to 600+ on this card https://litecoin.info/Mining_hardware_comparison#AMD_.28ATI.29

any thoughts (on the card.. not the coin).
 
Last edited:
bigted said:
up your intensity, -I 19 or so
Click to expand...

i actually went south on the i and things improved. new command line is

-I 13 -g 2 -w 256 --thread-concurrency 8192 --gpu-engine 1050 --gpu-memclock 1500 is now getting me 615+

though i did try -I 15 -g 2 -w 256 --thread-concurrency 8192 --gpu-engine 1050 --gpu-memclock 1500 with no much change.
 
At stock speeds you can pull in 830. I will post my settings when I get home
 
Low intensity and thread concurrency are killing you.

i run
22516 thread concurrency
2 GPU threads
256 worksize
intensity 18
~781 k/hash

Windows UI is sluggish, but definitely usable for web surfing.
 
~700 kh/s is about the best you can get. I had better luck with the --shaders vs using TC. the chosen TC by cgminer with the --shaders was 10200 or there about per the bin name.

Aso, play with your core clock rate, with scrypt, higher is no always better. for me it was 1026 on the dot, any higher and hashrate would drop off a cliff.
 
DriveEuro said:
Low intensity and thread concurrency are killing you.

i run
22516 thread concurrency
2 GPU threads
256 worksize
intensity 18
~781 k/hash

Windows UI is sluggish, but definitely usable for web surfing.
Click to expand...

using these settings, i get the following

maximum buffer memory device 0 supports 536870912
your scrypt settings come to 1475608576

i launched with the following command with the plan to increase -I once it was up and running.

C:\cgminer-3.7.2-windows\cgminer.exe --scrypt -u X -p X -o stratum+tcp://primary.coinhuntr.com:3333 -I 13 -g 2 -w 256 --thread-concurrency 22516
 
In the DOS box do:

setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1

close the DOS box, then try again.

H.
 
jjandrob said:
using these settings, i get the following

maximum buffer memory device 0 supports 536870912
your scrypt settings come to 1475608576

i launched with the following command with the plan to increase -I once it was up and running.

C:\cgminer-3.7.2-windows\cgminer.exe --scrypt -u X -p X -o stratum+tcp://primary.coinhuntr.com:3333 -I 13 -g 2 -w 256 --thread-concurrency 22516
Click to expand...

I run R9 290s. These numbers won't work on a 280. I didn't realize you had a 280.
 
bigted said:
look at this page: https://litecoin.info/Mining_hardware_comparison#AMD_.28ATI.29

that might help with trying different things, maybe using different versions of cgminer
Click to expand...

i think that's the page i linked above... looks the same.

http://www.newegg.com/Product/Product.aspx?Item=N82E16814150690 says the card runs at 1080 with a mem clock of 6200.

should i adjust my --gpu-engine=1050 to --gpu-engine=1080? i do not think i should adjust the mem clock to --gpu-memclock 6200 lol

also.. would adding --shaders 2048 help?
 
so yeah, same link, derped that one

anyhoo 6200 is going to be the effective clock, so since it's gddr5, divide 6200 by 5 and get 1050 (at least i think that's right, ha)

at this point trying the --shaders couldn't hurt
 
I use the following on my 280x cards :

setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
--verbose --scrypt --thread-concurrency 8192 -I 13 -g 2 -w 256 --lookup-gap 2 --gpu-engine 1080 --gpu-memclock 1500 --expiry 1 --scan-time 1 --queue 0 --no-submit-stale


Gives me approx 750kh/s per 280x card.

Hope it helps! :)

Edit: with an -I 13 you can use your system, not sluggish at all.
 
Last edited:
Yakk said:
I use the following on my 280x cards :

setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
--verbose --scrypt --thread-concurrency 8192 -I 13 -g 2 -w 256 --lookup-gap 2 --gpu-engine 1080 --gpu-memclock 1500 --expiry 1 --scan-time 1 --queue 0 --no-submit-stale


Gives me approx 750kh/s per 280x card.

Hope it helps! :)

Edit: with an -I 13 you can use your system, not sluggish at all.
Click to expand...

going this route has set me back to under 600.



_r2h said:
~700 kh/s is about the best you can get. I had better luck with the --shaders vs using TC. the chosen TC by cgminer with the --shaders was 10200 or there about per the bin name.

Aso, play with your core clock rate, with scrypt, higher is no always better. for me it was 1026 on the dot, any higher and hashrate would drop off a cliff.
Click to expand...

+1. slowing the clock helped me out a bit here. trying 1026 as your suggest and im just south of 702.

command line in the bat file is

setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
C:\cgminer-3.7.2-windows\cgminer.exe --verbose --scrypt --thread-concurrency 8192 -I 13 -g 2 -w 256 --lookup-gap 2 --gpu-engine 1026 --gpu-memclock 1500 --expiry 1 --scan-time 1 --queue 0 --no-submit-stale -u x -p x -o stratum+tcp://primary.coinhuntr.com:3333 --gpu-fan 95
 
jjandrob said:
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
C:\cgminer-3.7.2-windows\cgminer.exe --verbose --scrypt --thread-concurrency 8192 -I 13 -g 2 -w 256 --lookup-gap 2 --gpu-engine 1026 --gpu-memclock 1500 --expiry 1 --scan-time 1 --queue 0 --no-submit-stale -u x -p x -o stratum+tcp://primary.coinhuntr.com:3333 --gpu-fan 95
Click to expand...

Have you tried going to just one thread? It allowed my 7950 to get a lot more. I could use intensity of 20 and up the thread-concurrency considerably.

With two threads, 10240 was my max thread-cc.

The command line GFX settings (setx,etc) did help too.
 
Spidey329 said:
Have you tried going to just one thread? It allowed my 7950 to get a lot more. I could use intensity of 20 and up the thread-concurrency considerably.

With two threads, 10240 was my max thread-cc.

The command line GFX settings (setx,etc) did help too.
Click to expand...

can you throw me your command line? what app are you running?
 
jjandrob said:
can you throw me your command line? what app are you running?
Click to expand...

I use a config file and BFGMiner 3.8.1 x64 version.

Code: 
"api-allow" : "W:127.0.0.1",
"api-listen" : true,
"intensity" : "20",
"vectors" : "1",
"worksize" : "256",
"thread-concurrency" : "22400",
"scrypt" : true,
"gpu-engine" : "1100",
"gpu-fan" : "40-100",
"gpu-memclock" : "1575",
"temp-overheat" : "84",
"temp-cutoff" : "88",
"gpu-threads" : "1",
"kernel" : "scrypt",
"kernel-path" : "C:\\Program Files\\BFGMiner\\/share/bfgminer"
 
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I have an XFX black 280x, I can't go over 650 on it for who knows what reason. I have other 280x's and some with identical settings I get 740k on. I just haven't figure out why some cards running the same settings just don't perform the same when it comes to mining. I'm leaning towards adding more RAM to the problem systems or swapping the low performing cards into the setups that I know are working great.
 
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