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Dual 6970s

post #1 of 6
Thread Starter 
I have an HIS 6970 and was thinking on adding a second, what gains should I expect?
In-Process
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In-Process
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Intel Core i7 2600K x 4500 P67A-UD4-B3 Radeon HD 6970 G.SKILL Ripjaws X + Turbulence II Series 8GB (2... 
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G.SKILL Ripjaws X + Turbulence II Series 8GB (2... OCZ Vertex 3 Series – MAX IOPS Edition VTX3MI-2... Water Cooled Windows 7 (64bit) 
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post #2 of 6

FPS? 80-99% over a single 6970.

ケンジ
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i7-3960X i7-980X GA-X79-UD7 / GA-X58A-UD9 7970 + 465 
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2x 6990 + 580 16GB 2133 MHz 24GB 2000 MHz 120GB x 2 RAID0 
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120GB x 4 RAID0 Raptor 300GB x 2 RAID0 CPU-370 CPU-370 
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ケンジ
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2x 6990 + 580 16GB 2133 MHz 24GB 2000 MHz 120GB x 2 RAID0 
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120GB x 4 RAID0 Raptor 300GB x 2 RAID0 CPU-370 CPU-370 
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post #3 of 6
That depends on the game really. Older games aren't optimised for Crossfire generally and you could see performance gains of 10% if you're lucky. It also very much depends on AMD's drivers. For most big releases, like Battlefield 3, AMD has a team working on special Crossfire profiles to get the maximum out of your second card. It has been shown that adding a second 69xx card can increase your performance by up to 100%.
    
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i7-870 @ 4.01ghz (HT ON) MSI P55-GD80 Ref CLUB 3D - RADEON HD6970 @ stock Corsair Vengeance - 8G's CL8 1600mhz 
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SAMSUNG 1TB + OCZ Vertex 2 60G none Windows 7 Ultimate BENQ 24" 
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i7-870 @ 4.01ghz (HT ON) MSI P55-GD80 Ref CLUB 3D - RADEON HD6970 @ stock Corsair Vengeance - 8G's CL8 1600mhz 
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SAMSUNG 1TB + OCZ Vertex 2 60G none Windows 7 Ultimate BENQ 24" 
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post #4 of 6
it depends on what rig you have,what game you play and what resolution you play at.
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q9550@3,84ghz@1.39v stronger-common perf lvl 7!... asus rampage formula x48 2x gigabyte 6970 windforce crossfire 8gb mushkin 1080mhz 5-5-5-15 
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2x1tb western digital 7200 rpm 64mb cache noctua nh-u12p windows 7 ultimate 64bit sp1 lg w2361v 1920x1080 23'' 
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main pc
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q9550@3,84ghz@1.39v stronger-common perf lvl 7!... asus rampage formula x48 2x gigabyte 6970 windforce crossfire 8gb mushkin 1080mhz 5-5-5-15 
Hard DriveCoolingOSMonitor
2x1tb western digital 7200 rpm 64mb cache noctua nh-u12p windows 7 ultimate 64bit sp1 lg w2361v 1920x1080 23'' 
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750 watt chieftec turbo series 80+ cf certified cosmos s mx518 genius 4000 
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post #5 of 6
As long as the CPU can deliver at least 80%. Most games 90%.
Ishimura
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Silent Knight
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SanDisk Ultra II 960GB Toshiba X300 5TB Corsair H100i GTX eVGA Hybrid Water Cooler  
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4x GentleTyphoon AP-15 Windows 10 Pro 64-Bit Philips Brilliance BDM4065UC 4K Razer BlackWidow Chroma  
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eVGA SuperNOVA 750 G3 Define Nano S Logitech G502 Proteus Core PECHAM Gaming Mouse Pad XX-Large 
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Audioengine D1 DAC Mackie CR Series CR3 Audio-Technica ATH-M50 Sennheiser HD 598 
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Sony XB950BT 
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AMD Phenom II X4 955 @ 4.2GHz ASUS M4A79XTD EVO AMD Radeon HD 7970 3GB @ 1200/1500 2x 4GB G.SKILL Ripjaws X DDR3-1600 
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OCZ Agility 3 60GB WD Caviar Green 1.5TB 2 x Seagate Barracuda 2TB XSPC Raystorm 
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NZXT Switch 810  
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Ishimura
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Silent Knight
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CPUMotherboardGraphicsRAM
Intel Core i7 3770K @ 4.6GHz ASRock Z77E-ITX eVGA GTX 1080 Ti Hybrid AMD Radeon R9 16GB DDR3-2400MHz  
Hard DriveHard DriveCoolingCooling
SanDisk Ultra II 960GB Toshiba X300 5TB Corsair H100i GTX eVGA Hybrid Water Cooler  
CoolingOSMonitorKeyboard
4x GentleTyphoon AP-15 Windows 10 Pro 64-Bit Philips Brilliance BDM4065UC 4K Razer BlackWidow Chroma  
PowerCaseMouseMouse Pad
eVGA SuperNOVA 750 G3 Define Nano S Logitech G502 Proteus Core PECHAM Gaming Mouse Pad XX-Large 
AudioAudioAudioAudio
Audioengine D1 DAC Mackie CR Series CR3 Audio-Technica ATH-M50 Sennheiser HD 598 
Audio
Sony XB950BT 
CPUMotherboardGraphicsRAM
AMD Phenom II X4 955 @ 4.2GHz ASUS M4A79XTD EVO AMD Radeon HD 7970 3GB @ 1200/1500 2x 4GB G.SKILL Ripjaws X DDR3-1600 
Hard DriveHard DriveHard DriveCooling
OCZ Agility 3 60GB WD Caviar Green 1.5TB 2 x Seagate Barracuda 2TB XSPC Raystorm 
CoolingCoolingOSPower
EK-FC7970 XSPC RS360 Windows 10 Pro 64-Bit Corsair TX750 
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NZXT Switch 810  
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post #6 of 6
really depends on what games your playing, but crossfire is crossfire, it just comes down to how good of a deal you can get.
Sharkbait
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Sharkbait
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3xWD RE4 2tb Crucial M4 128gb none Corsair h80 
OSMonitorKeyboardPower
Windows 7 Pro 64-bit HP ZR30w 30" IPS Corsair vengeance k60 Corsair hx850 
CaseMouseMouse PadAudio
Lian Li Lancool DragonLord K62R1 Corsair vengeance m60 Razor Large ASUS Xonar Essence STX 
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