Cannot run 7950 and 280x together??? :(

[Calhil]

You can just have a separate config for each card type and specify the devices you want to use with it. Check the --device option in cgminer. I run 7950 and 280x in the same rig with no problems.

[ibrahim11]

I've got those 2 in a rig right now (both are MSI though) and it's working just fine.

Like the previous poster said you do need 2 separate batch files for the best results because of the threads flag (g-).

good luck!

If i were to sell my 7950 and buy another 280x, should I buy the Sapphire Toxic 280x, MSI 280x or the Generic AMD 280x

You can just have a separate config for each card type and specify the devices you want to use with it. Check the --device option in cgminer. I run 7950 and 280x in the same rig with no problems.

Seriously???

[ibrahim11]

You can just have a separate config for each card type and specify the devices you want to use with it. Check the --device option in cgminer. I run 7950 and 280x in the same rig with no problems.

Is this true?

[Jaerky]

Remember that crossfire runs with cards of the same lineup ie 7850, 7870 etc

Since the 280x are technically rebranded older cards, you might be able to get away with it but best bet is to call up AMD or email then and ask them.

[Prelektro]

They work together without a problem. I had sapphire 7950 and powercolor r9 280x. I choose -g 1 and hash values were 600 khash/s for 7950 and 660 khash/s for 280x. 600 is pretty normal for 7950 but 660 is not very good for r9 280x (normally 280x can get 700 khash out of box and with oc can easily get around 750 khash) You won't get best performance from both cards but still it's not that bad.

[ibrahim11]

Just bought the mobo and 2x 2gb G.skill ripjaws ram

Is XFX 850w PSU any good?

I'm still thinking whether to sell the 7950 and buy another MSI 280x or not

How many K/Hashes will the 7950 get if the gpu thread is on 2?

Can't i just run 2 instances of cgminer and set one -g 1 and the other -g 2?

[ibrahim11]

Any other suggestions?

[Moheta]

You can just have a separate config for each card type and specify the devices you want to use with it. Check the --device option in cgminer. I run 7950 and 280x in the same rig with no problems.

Or make two workers at your pool and create two batch files like the following (assuming your cards are named 0 and 1):

Code:

cgminer --scrypt -o stratum+tcp://yourpool.com:port -u you.worker1 -p x -d 0 --remove-disabled

Code:

cgminer --scrypt -o stratum+tcp://yourpool.com:port -u you.worker2 -p x -d 1 --remove-disabled

Of course you can tweak and add your settings but this should get them running.  You'll have 2 instances of cgminer with settings customized for each card.

[Maximusprime]

I found this thread because I am having the same issues, if anyone can help please pm me. The devices command is having no affect on and its getting frustrating.