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New To Crossfire!

post #1 of 5
Thread Starter 
Hello recently bought a 2nd 7850 to live my dream of finally having 2 graphics cards in my computer, feels sexy.

Anyways quick questions, on my 2nd gpu I had to plug in 4 pin molex adapters to power it since I forgot I have xfx which are the only 7850 that requires 2 pci power plugs instead of 1.

When I went to overclock them, to my previous OC on my single card which was 1020mhz which is like nothing for a 7850 and it's kind of irritating... On heaven benchmark I got 99.9fps both stock, with OC I got 68 or something. Could this just have to do with the power supply or just a bad clock?

2nd thing, when I go to GPU-z, it detects both card enabled in crossfire and all. The 1st card has a bus width of 256, but the 2nd card has only 32 bit. Is this just something that has to do with the cards or pcie slot or what? Does this effect the performance?
THISISACOMPUTER
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CPUMotherboardGraphicsRAM
i5-2500k @ 4.5Ghz ASRock Extreme4 XFX 7850 DD CrossfireX G.Skill Ripjaws 8GB 1600mhz 
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OCZ Vertex 4 128gb | 7200.12 750gb x2 Dunno Passive Hyper 212 Win 7 64-bit 
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THISISACOMPUTER
(14 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500k @ 4.5Ghz ASRock Extreme4 XFX 7850 DD CrossfireX G.Skill Ripjaws 8GB 1600mhz 
Hard DriveOptical DriveCoolingOS
OCZ Vertex 4 128gb | 7200.12 750gb x2 Dunno Passive Hyper 212 Win 7 64-bit 
MonitorKeyboardPowerCase
Asus 24" Logitech Slim awesomeness Antec HCG 520w Cooler Master Storm Scout 
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post #2 of 5
What are your temps, and did you do a CLEAN driver install?
Behemoth
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Intel i7 4790K "Relidded" Asus Sabertooth Z97 MK1 Custom WC'd 7970 3GB @ 1100/1500 stock volts Custom WC'd 7970 3GB @ 1100/1500 stock volts 
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2X4GB Patriot Viper Extreme 1TB Velociraptor 10k RPM w/ 64MB Cache Two Arqtik TEC Chillers in Series Arqtik SDD TEC Waterblock 
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Two Ported/tapped MCP655 Pumps 2x Black Ice GTX 480 Gen2 Rads DD dual drive bay Res with LCD water temp monit... GPU Loop: Modded Enzotech Sapphire CPU blocks, ... 
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36x Globe 120mm 80cfm server fans Win 10 Pro Mint 15(KDE) 4K 28" Samsung U590D 
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Behemoth
(25 items)
 
  
CPUMotherboardGraphicsGraphics
Intel i7 4790K "Relidded" Asus Sabertooth Z97 MK1 Custom WC'd 7970 3GB @ 1100/1500 stock volts Custom WC'd 7970 3GB @ 1100/1500 stock volts 
RAMHard DriveCoolingCooling
2X4GB Patriot Viper Extreme 1TB Velociraptor 10k RPM w/ 64MB Cache Two Arqtik TEC Chillers in Series Arqtik SDD TEC Waterblock 
CoolingCoolingCoolingCooling
Two Ported/tapped MCP655 Pumps 2x Black Ice GTX 480 Gen2 Rads DD dual drive bay Res with LCD water temp monit... GPU Loop: Modded Enzotech Sapphire CPU blocks, ... 
CoolingOSOSMonitor
36x Globe 120mm 80cfm server fans Win 10 Pro Mint 15(KDE) 4K 28" Samsung U590D 
KeyboardPowerCaseMouse
Logitech G710+ Mechanical CM Silent Power M 1000watt Main, OCZ Z850W Slave Custom Mountain Mods Extended-Extended Ascension Logitech G502 Proteus 
Mouse PadAudioAudioAudio
Homemade 16ga 304 Stainless pad, Neoprene backed Aune T1 DAC Various Tubes: Mostly switching from 60's GE "S... AKG K7XX Headphones 
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post #3 of 5
Thread Starter 
Temps hit 70c in game without oc so I'm guessing it wasn't he temp maybe it could have it 75 still no difference really without a volt increase. I installed new drivers and profiles yes, but didn't do a clean install. In my 4-5 years of gaming history reinstalling graphics drivers has never fixed any of my problems tongue.gif

The bit thing could that have anything to do with the (16x/1x) or whatever that is all about?
THISISACOMPUTER
(14 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500k @ 4.5Ghz ASRock Extreme4 XFX 7850 DD CrossfireX G.Skill Ripjaws 8GB 1600mhz 
Hard DriveOptical DriveCoolingOS
OCZ Vertex 4 128gb | 7200.12 750gb x2 Dunno Passive Hyper 212 Win 7 64-bit 
MonitorKeyboardPowerCase
Asus 24" Logitech Slim awesomeness Antec HCG 520w Cooler Master Storm Scout 
MouseMouse Pad
Cooler Master Storm Spawn Steelseries 
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THISISACOMPUTER
(14 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500k @ 4.5Ghz ASRock Extreme4 XFX 7850 DD CrossfireX G.Skill Ripjaws 8GB 1600mhz 
Hard DriveOptical DriveCoolingOS
OCZ Vertex 4 128gb | 7200.12 750gb x2 Dunno Passive Hyper 212 Win 7 64-bit 
MonitorKeyboardPowerCase
Asus 24" Logitech Slim awesomeness Antec HCG 520w Cooler Master Storm Scout 
MouseMouse Pad
Cooler Master Storm Spawn Steelseries 
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post #4 of 5
The bus width thing is normal, my 7990 does that, too. It's because the second GPU idles, when not gaming.
My baby
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My baby
(16 items)
 
  
CPUMotherboardGraphicsRAM
Intel i7 2600 (non K-sku) @ 4Ghz MSI P67A-GD65  AMD Radeon HD7990 Crucial Ballistix Tracer 16GB (4x4GB) 
Hard DriveHard DriveHard DriveOS
Western Digital WD Green WD10EZRX Western Digital WD Green WD20EARS Micron RealSSD C400 Windows 8  
MonitorKeyboardPowerCase
3xFujitsu Siemens 23" Logitech G710+ OCZ Fatal1ty 1000w CM Storm Scout 2  
MouseMouse PadAudioAudio
Steelseries Sensei Razer something Steelseries Siberia V2 NAD 2600A + NAD 2700THX + JBL J5120 
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post #5 of 5
Thread Starter 
I feel better now.
THISISACOMPUTER
(14 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500k @ 4.5Ghz ASRock Extreme4 XFX 7850 DD CrossfireX G.Skill Ripjaws 8GB 1600mhz 
Hard DriveOptical DriveCoolingOS
OCZ Vertex 4 128gb | 7200.12 750gb x2 Dunno Passive Hyper 212 Win 7 64-bit 
MonitorKeyboardPowerCase
Asus 24" Logitech Slim awesomeness Antec HCG 520w Cooler Master Storm Scout 
MouseMouse Pad
Cooler Master Storm Spawn Steelseries 
  hide details  
Reply
THISISACOMPUTER
(14 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500k @ 4.5Ghz ASRock Extreme4 XFX 7850 DD CrossfireX G.Skill Ripjaws 8GB 1600mhz 
Hard DriveOptical DriveCoolingOS
OCZ Vertex 4 128gb | 7200.12 750gb x2 Dunno Passive Hyper 212 Win 7 64-bit 
MonitorKeyboardPowerCase
Asus 24" Logitech Slim awesomeness Antec HCG 520w Cooler Master Storm Scout 
MouseMouse Pad
Cooler Master Storm Spawn Steelseries 
  hide details  
Reply
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