Just bought a Gigabyte REF R9 290X along with the Arctic Acelero Xtreme III.
I don't believe the AIB coolers will be any more effective and they will be much noisier with them smaller fans buzzing compared to the Exteme III solution.
NOTE: The Extreme III uses 3 Slots and possibly 4 if the Back Plate Bracket fouls a card in say a PCIe slot located ahead of the Video Card Slot.
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i7 2700k/ASUS P8Z68-V Pro Gen3/Corsair H110 AIO (running @ .996v/1600Mhz to 1.376v/4600Mhz 24/7 between 36 to 67C), 4 x's 4GB sticks of Samsung MV-3V4G3D-US DDR3 running at 1.34v/1866Mhz 9-9-9-24 1T with 4GB's assigned to a RAMDisk drive to handle Win7 64 Bit Sluff and negate writes to the SSD, Samsung 840 Pro 256 SSD, 2 x's WD5001AALS HDD's in Raid-0, 1 x's WD1002FAEX 1TB, ASUS DRW-24B1ST DVDRW, Hauppauge WinTV HVR-1250 PCIe, 2nd Intel NIC for Dual Networking, XFX 850W Pro Black Black Edition modular PSU, AMD Ref Gigabyte 1000Mhz R9 290X/Accelero Xtreme III, eVGA GTX 280 in reserve for Physic's-X support, Fractal Design ARC Midi R2 case, QX2510 Samsung PLS 2560x1440 res display at 120Hz.
TOTAL Investment on this Platform including 13% HST Tax Plus Shipping is approx $2,534.00 spent over a period of a year.
Aside from Mfgr's 10 to 15% price markup selling to the CDN Market the killer is the 13% HST Tax and cost of shipping in Canada. I pd $3000 for a 386-40 DX in 1994 - LOL.