i recently just swapped my two 4850's for two 3870X2's using an msi K9A2 mobo and a 1200watt psu but here's my prob.  One card werks fantastic!  the other card when i in stalled it to run both of these baddies in crossfire i get a crossfirex diagnostic message, "the crossfirex internal bridge interconnects linking your crossfire x graphics cards are not properly connected.  Both bridge interconnects must be attached.   now ive narrowed it down to the one card thats causing the problem.   so here's my question. do i just take the plastic shell off of the card and replug in some internal bridge on the card or do i light it on fire and do a little dance around it

what did you install hd3870×2 and ×2 or hd4850 with hd3870×2,becouse 2×hd3870×2 shoud work with one bridge interconect(becouse i have that setup and it works)hd3870×2 and hd4850 you cant mix.

i only have two 3870X2's.  one of the cards apparently is messed up or something.  i get a crossfire diagnosis on CCC that sez "internal crossfirex bridge is not connected....thats internal."  so im wondering if inside the card itself if there is an "internal bridge" that is repairable.  never ran into this problem before.  i dont think its talking about the crossfire ribbon that i think you are refering too.

hy, i have too 2×hd3870×2 and i have a mother board x38-dq6,and i just put in the cards normaly conected with crossfire bridge and install the driver and they worked,try see if the crossfire bridge is conected properly,or are they plugded in corectly,if sow if you have motherboard that suport dual gpu then they should work,see for the latest motherboard driver thats inportant,and i gues you have vista sp1 intergraded,they shuld work.

hi man, hey i want to know if i can run two 4890 in crossfire with a power supply corsair tx750w, i have mobo 790gx, 4 gb ram ddr3 1333, cpu 955 3.2gzh, and two HDD. i want to buy two cards in cross fire i wanna two 4890 but i need know if my power suppy can run them in crossfire. tanks man

With the 3870x2's there is only 1 crossfire interconnect which does require one CROSSFIRE internal bridge connector and with the current drivers there should be no issue. If they are not crossfiring its most likely a software driver issue which could be fixed with a clean install of the OS. Or if its a hardware issue then that is down to the motherboard and its capabilities. Only cards that had issues was the 3870x2's with 4-DVI that got fixed in the 9.x drivers that were addressed thankfully to the Sapphire 4850x'2 that had this rare 4-dvi connectors. But it would still require quite a beefy PSU with some serious AMPS on the 12+v rails as WATTS are meaningless.

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CASE:XclioAdvancedWindtunnel|PSU:CMRealPowerPro850|CPU:IntelQ9300|MOBO:AsusMaximusFormulaX38
RAM:2gbGEIL1200DDR2x4(8gb)|GPU:MSIr4830T2D1GOCx2|HD:WD500gbSATA2x4|BD:LiteonBlurayMultiRom
FANS:250x2,200x1,120x3|COOLERS:CMorb&SYTHEmushashi|OS:Windows7 Pro|DRIVERS:CatalystSuite9.11
OCVALUES:cpu@3.0x7.5(400fsb)1.325v|ram@800mhzCRt2(1:1fsb:dram)1.8v|gpus@700/1000(40c-60c)1.23v
Windows Experience Index: 7.3 7.3 7.3 7.3 5.9 no-raid

Why are you spamming everyone's threads.  Start your own thread or check the compatability chart that's provided on this site.

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Upgraded FX6800-01e; X58 MoBo; i7 920 stock; Corsair 8 GB DDR3 RAM 1066MHZ (8-8-8-19); Seagate 750 GB HD SATA II; 700W PSU: Sapphire (XFX BIOS) / XFX 1 GB 4850s @700/1200 - Crossfire; 1 - 120mm exhaust & 1 - 120mm cool air fan and 2 - 80mm cool air fan; Samsung SyncMaster  25.5" 1900X1200 native display and Dell-E207WFP 22" 1680X1050 native display; Windows Vista Premium SP 2 64 bit; Logitech wireless keyboard / laser mouse.