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Asus Crosshair V Formula(+z) mobo not compatible with R9 280x's in crossfire?!

post #1 of 7
Thread Starter 


Just a word of warning to any owners of the Asus Crosshair V Formula, or Asus Crosshair V Formula-Z motherboard who intend on buying a pair of R9 280x's to use in crossfire.... don't.

I bought two XFX Double Dissipation R9 280x's to replace my old 6950's but the longest crossfire bridge (10cm) isn't long enough to stretch across the x16 PCIe lanes.

XFX don't seem to care and have blamed the motherboard for being "incompatible" with their cards. They don't seem to understand that it's their oversized non-reference cooler causing the problem!

I'm now having to choose between returning the cards for something else, or replacing my motherboard completely. Both at my expense.

Really not very happy but what else can I do?! Any advice on which board to go with if I have to get rid of my trusty Formula V? Or what cards could I use that won't be a stretch for the crossfire bridge?
post #2 of 7
Do you have 280x or 290x youve mentioned them both.. 290x dont require a bridge. 280x I believe does. If you have the 280x im not sure how to help you sorry. Havent had the chance to crossfire/sli yet!
Edited by krisz9 - 11/5/13 at 7:04am
 
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Future Dream Rig
(24 items)
 
 
CPUMotherboardGraphicsRAM
i7 4770k Asus Maximus VI Hero NVIDIA GeForce 8800 GTS 320MB G.SKILL Ripjaws X Series 8GB (2 x 4GB) DDR3 213... 
Hard DriveOSMonitorKeyboard
WD 500 GB 5200 RPM Windows 7 24" LCD 1080p Microsoft Digital Media Pro 
PowerCase
750W Antec Xion Black w/ Blue LED 
CPUMotherboardGraphicsRAM
intel i7-4770K (recently purchased, exempt) ASUS maximus VI hero (recently purchased, exempt) GIGABYTE R9 290 (extra: another r9 290 for late... G.SKILL Ripjaws X Series 8GB (2 x 4GB) DDR3 213... 
Hard DriveHard DriveCoolingCooling
SAMSUNG 840 Pro Series 256GB WD BLACK SERIES WD2003FZEX 2TB 7200 RPM 64MB Ca... Koolance Radeon r9 290 VGA Liquid Cooling Block... Alphacool NexXxoS XT45 Full Copper Triple 140mm... 
CoolingCoolingCoolingCooling
Alphacool NexXxoS XT45 Full Copper Dual 140mm R... XSPC RayStorm High Performance Acetal CPU Liqui... Swiftech MCP655-PWM-DRIVE 12v Water Pump Module... Bitspower Water Tank Z-Multi 250 Inline Reservo... 
CoolingCoolingMonitorKeyboard
EK D5 X-Top Acetal Pump Top CSQ - Laing D5 & Sw... [extra: Koolance VGA Block Connecting Set - 2-C... Crossover 27QW 27" IPS 1440p Corsair Vengeance K70 Keyboard (red switches) 
PowerCaseMouseAudio
SeaSonic Gold 1250w Phanteks Enthoo Series Primo Logitech g500s Logitech G930 Wireless Gaming Headset (optional... 
OtherOtherOtherOther
WC and misc:distilled water, sleeving, drain/fi... Swiftech Lok-Seal™ Compression Fitting G1/4 Thr... PrimoChill PrimoFlex Advanced LRT Tubing 3/8"ID... Phanteks 140mm x 25mm Black Frame / White Blade... 
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post #3 of 7
Thread Starter 
Opps - thread title should be "280x"!! Can I edit? Mod?

XFX are now threatening me with libel for using terms like "XFX don't seem to care". Which is nice ;D
post #4 of 7
i know this isnt what you want to hear but jump that bottom gpu up to slot 2. its only a x16 x8 but after doing alot of research on the bandwith between x16 and x8 when you use cross fire or sli you wont notice a change in performace at all. i have a rampage iii extreme mobo ive had for long time and running the two x16 slots didnt yeiled me any more fps than running lanes one and two. the only down side is the heat. the air space will be tight since it puts the gpus ontop of eachother but with the xfx double d coolers and a good case it shouldnt be a proplem. other than that im not sure but asus did shipp an extra long crossfire strap with certain mobos. could be somthing that might help. im just not sure how long it was.
post #5 of 7
PCI-E slots have standard spacing across all manufactures its not just an asus thing with that board, so your going to have the same issue no matter what board you go with if your trying to space your gpus one slot apart.

Best thing you can do is to put them in adjacent slots. Sure temps will probably go up but you will be able to run crossfire.
post #6 of 7
You know you can get extended cross fire bridges in.
110mm
150mm
200mm.

Standard one is 90mm.
post #7 of 7
Sorry to ask but did you manage to connect them finally using Crossfire? Because in the photo, it seems you have managed to do so. How long was the Crossfire bridge you used to connect the two cards please? Thank you!
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