|
Problem description: I am trying to get a pair of R9 280x cards to work together in crossfire. The system sees them both, and they both work perfectly fine as a single card. Even when they're both installed with a bridge on the machine boots up and works fine, but the enable crossfire option is grayed out in the Catalyst Control Center, alone with an error message stating I need to have both bridges hooked up. This struck me as odd, as these cards are supposed to work in Tri-Fire and Quad-Fire as far as I know, with both bridges on that would totally disable this. Anyone know if this is actually the case and this absolutely requires the use of 2 bridges for 2 cards? Attempted fixes: I have tried a single bridge every which way it can be installed on the gpu's Recent changes: Nope -- Operating system: Win 8.1 64 bit System specs: Core i5 4670k, MSI Gaming 5 mobo, Sapphire Dual-X R9 280-x, Club3D R9 280X, 8gb DDR3, Location: Canada I have Googled and read the FAQ: Yes
|
#
?
Mar 22, 2015 20:27
|
|
|
|
| # ? Apr 20, 2024 05:17 |
|
|
Yes, you must have both Crossfire bridges connected to enable Crossfire, just like it says. if you Google this you will find older information that says it can work with a single bridge, but this is no longer true. Tri and Quad crossfire never actually "worked" in terms of increasing performance for this reason (and PCI-E bandwidth*), the only exception was Quad-Crossfire achieved by pairing two dual-GPU cards. *LGA-1150 boards offer a single PCI-E 3.0 x16 slot from the CPU. Decent boards can split this into two x8 slots, providing 8GB/sec of bandwidth each. The third PCI-E slot is provided by the chipset at PCI-E 2.0 x4, for only 2GB/sec of bandwidth. This isn't enough for a videocard to run for gaming, especially when trying to use multi-GPU rendering. Alereon fucked around with this message at 22:04 on Mar 22, 2015 |
|
#
?
Mar 22, 2015 22:01
|
|
|
Ahh, that makes sense! Thanks man, was really scratching my head over that.
|
|
#
?
Mar 22, 2015 22:37
|
|