Crossfire Problems ?

[PacosTacos88]

I know these are old cards but I wanted to upgrade my performance without spending $300+
I started with one Radeon r7 265 and found another from a friend for cheap. I just installed the new one with a crossfire bridge and the CCC allowed me to select Crossfire. But when I run the benchmarks, my performance didn't increase and whichever card I put in the bottom PCI slot, the fan almost never runs. I did only have one PCI power plug from my power supply tho and had to buy a splitter, could that be the problem? I have a Corsair cx430 which I think would have enough power?

 

[PacosTacos88]

MERGED QUESTION
Question from PacosTacos88 : "Crossfire help with dual r7's ?"

I know my hardware is a little dated but a lot of money is not something I have for PC stuff. I had an R7 265 and found another for pretty cheap. CCC shows they're in Crossfire but when I run a new benchmark, it doesn't jump up any and whichever card is on the bottom, the fan hardly ever runs. I only had one PCI power cord and had to use a splitter cable to run to both cards. Could this be why it's not working? I have a Corsair cx430. Thanks

 

[bmockeg]

You can't split that power cable number 1. Number 2 each card requires 180 watts which is 360 plus everything else, no way that PSU is gonna run that. Crossfire isn't a good idea anyway, better option was,to sell your card and buy a good single

 

[COLGeek]

Your PSU is not meeting your power needs. Upgrade the PSU to a quality 650w (or stronger) unit and then assess.

CF, especially with lower end GPUs, is far from awesome. Don't have huge expectations for performance gains given this config.