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Author Topic: Problems adding more cards - r9 280x  (Read 498 times)
merkin (OP)
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March 04, 2014, 02:40:34 PM
 #1

Heya Guys I finally made a little open case so I can start adding more cards to it.

I was running a Sapphire r9 280x in a standard case

and Now I got a new mobo H81M-Plus

with a celeron chip, and 2GB of RAM

and I bought another Sapphire 280x

I am running them both on pci-e powered risers on 1x  (Comp wouldnt boot with having one in the 16x on rise)


tl;dr Anyway I'm getting pretty low khash now... than I did before ( Was getting ~710Khash) on my single 280x in the rig before this


Im getting around 450 now on one card, and the other is staying as low as 2.4 khash/s  Shocked
Looking at it now it's on 0.0 khash :|


This is the kind of cgminer code i am using

export GPU_MAX_ALLOC_PERCENT=100
export GPU_USE_SYNC_OBJECTS=1
COLOR 0A
C:\Cgminer\cgminer.exe --scrypt -o stratum+tcp://rbbt.weminecrypto.pw:3333 -u user.username -p password -I 13 -g 2 -w 256 --thread-concurrency 11200 --shaders 2048 --expiry 1 --scan-time 1 --queue 0 --no-submit-stale --auto-fan


Please, any ideas what's going on here?

Help is greatly appreciated and will be happy to donate some coinage


I am using 14.1 betas (as I did before)
Seems the drivers are crashing heaps now and cg miner is crashing too Cry

Ritual
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March 04, 2014, 03:47:15 PM
 #2

What kind of PSU do you have?

Newbie oriented mining site - http://cryptoexperiment.wordpress.com/ --- Free BTC - http://freebitco.in/?r=231531
merkin (OP)
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March 04, 2014, 11:37:54 PM
 #3

1000W Silverstone Gold

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March 05, 2014, 03:18:17 AM
 #4

add more ram and it will be fine.
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