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8x pcie vs 16x pcie

post #1 of 2
Thread Starter 
well from what i read, 8x has 4gbps bandwidth while the 16x has 8 gbps bandwidth.

my rampage iii formula has 16x 16x 8x with the first 16x occupied by my sapphire hd6970.

now, if i add 2 more hd6970, i dont want the last one being bottlenecked by the 8x slot, so i was thinking of getting a hd6990 and putting it in the 16x, but since the 6990 is dual gpu's would, putting it in the 16x be effectively cutting it down by half to 8x per gpu?
post #2 of 2
the loss in performance is minimal, like 2%. This would translate in a loss of 2 FPS in 100, wich you wouldn't notice. With 3 cards in Xfire you definitely won't notice the difference.
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I need upgrades
(21 items)
 
  
CPUMotherboardGraphicsRAM
Phenom II X6 1090T Foxconn A79A-S PNY GTS450 XLR8 KVR800D2N6/2G 
Hard DriveHard DriveHard DriveHard Drive
WD2500AAKS WD3200AAKS WD10EARS WD3200JB 
Optical DriveOptical DriveCoolingOS
Asus DRW-1608P2 Asus DRW-1608P2 Corsair H70 Ubuntu Server 10.10 x64 
OSMonitorKeyboardPower
Windows 7 Professional x64 SP1 ASUS VW193S Logitech EX100 LC-Power 650W 
CaseMouseAudioAudio
Coolermaster Stacker 830 SE Logitech EX100 Creative Audigy 2 ZS Creative i-Trigue L3450 
  hide details  
Reply
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