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GTX 580 SLI PCIE Slots

heya guys

just got a question i'm not a noob at hardware just not sure about this

so people say put the 2nd GPU to 3rd slot to make the cooling more effective

but issue i think is would it not run at 16x/4x ?

or does it scale to 8x 8x no matter what PCIE slot you use?

i have a Asrock P67 Fatality Professional Motherboard

http://www.asrock.com/mb/overview.asp?Model=Fatal1ty%20P67%20Professional

Premium Gold Caps (2.5 x longer life time), 100% Japan-made high-quality Conductive Polymer Capacitors
Digi Power, Advanced V16 + 2 Power Phase Design
Supports Intel® K-Series unlocked CPU
Supports Dual Channel DDR3 2133(OC)
Integrated PLX PEX8608 chip onboard to offer sufficient PCI-E lanes
Supports ATI™ Quad CrossFireX™, 3-Way CrossFireX™ and CrossFireX™
Supports NVIDIA® Quad SLI™ and SLI™
Dual PCIE GLAN with Teaming function
1 x Fatal1ty Mouse Port, 2 x Front USB 3.0 ports, 4 x Rear USB 3.0 ports, 6 x SATA3 connectors, 1 x eSATA3 connector, 2 x IEEE 1394 ports
Dr. Debug, Smart Switch Design: Power/Reset/Clear CMOS Switch with LED
Supports Fatal1ty F-Stream, XFast USB, Graphical UEFI, Instant Boot, Instant Flash, Good Night LED, APP Charger, SmartView
Combo Cooler Option (C.C.O.)
7.1 CH HD Audio with Content Protection (Realtek ALC892 Audio Codec), THX TruStudio PRO™ and Premium Blu-ray audio support
Free Bundle : 1 x SLI_Bridge_2S Card , 1 x Front USB 3.0 Panel, 1 x Rear USB 3.0 Bracket
2 answers Last reply Best Answer
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  1. Best answer
    from your motherboard link
    dual at x8 (PCIE2) / x8 (PCIE4);

    as soon as you install a 2nd graphics card slot 2 will drop back to x8
    So yes with both cards you will run x8 x8

    its reccomended for your mobo to use Slot 2 & 4 for this setup.

    i believe this is the 2 BLACK slots on your board
  2. Best answer selected by bowzef.
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