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Radeon HD 7850 Crossfire (16x, 4x,)

post #1 of 14
Thread Starter 
I have a MSI HD 7850 2GB and wanted to get another to run in Crossfire but the motherboard I have is a AM3 Biostar TA870U3+ and it has 2 x PCI-E x16 2.0 Slot (x16, x4) I know the card is not top end but would a CF setup like this lower performance to a point where its not worth doing it or would it be just fine to do it with only a little hit in performance.

Any info any one can give me on this would be welcome as I see people have done this with older cards but not sure how the new 7000 range would be like this.
    
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post #2 of 14
I know in an x8 x8 config there would be no problem, but in a x16 and x4 there will be some degradation. The mobo in my Sarabera has a x16 and x4 configuration and when I bought it I knew I was not going SLI/Crossfire with it.

Now, if you do want to, you can always buy a flexible PCI-e riser and make that first x16 slot into a x8 x8 slot for a SLI/Crossfire set-up.
 
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BitoHeaven
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G.Skill Trident X 2X8GB DDR3 2400MHz Samsung 840 PRO 256GB  Seagate Barracuda 7200.14 3TB SATA III 6Gb/s 64... Pioneer Blu-ray Burner 
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EVGA SuperNOVA G2 1300w 80+ Gold Fully Modular  Fractal Design Arc Midi R2 Microsoft Sidewinder X5 Allsop Redmond Mouse Pad 
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post #3 of 14
Thread Starter 
With my board the second slot is x16 wide but wired for only x4 so thats my main problem
    
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Hard DriveHard DriveOptical DriveCooling
SanDisk SSD (SDSSDP-128G-G25) Western Digital Caviar Blue Samsung Super WriteMaster S-ATA 22X DVD-RW Antec Kühler H1200 PRO 
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Windows 10 Pro 64-Bit Samsung SyncMaster B2230H Razer Blackwidow 2014 EVGA 600W 80+ White 
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post #4 of 14
its a 10% loss compared to x16

Not that big of a deal.
post #5 of 14
Thread Starter 
So if I can get a good deal on a 2nd 7850 then its worth it??.
    
CPUMotherboardGraphicsRAM
Phenom II X6 1090T GIGABYTE GA-970A-UD3P Inno3D GeForce GTX 970 iChiLL x4 Air Boss Ultra 4 x 4 GB DDR3 
Hard DriveHard DriveOptical DriveCooling
SanDisk SSD (SDSSDP-128G-G25) Western Digital Caviar Blue Samsung Super WriteMaster S-ATA 22X DVD-RW Antec Kühler H1200 PRO 
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Windows 10 Pro 64-Bit Samsung SyncMaster B2230H Razer Blackwidow 2014 EVGA 600W 80+ White 
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CPUMotherboardGraphicsRAM
Phenom II X6 1090T GIGABYTE GA-970A-UD3P Inno3D GeForce GTX 970 iChiLL x4 Air Boss Ultra 4 x 4 GB DDR3 
Hard DriveHard DriveOptical DriveCooling
SanDisk SSD (SDSSDP-128G-G25) Western Digital Caviar Blue Samsung Super WriteMaster S-ATA 22X DVD-RW Antec Kühler H1200 PRO 
OSMonitorKeyboardPower
Windows 10 Pro 64-Bit Samsung SyncMaster B2230H Razer Blackwidow 2014 EVGA 600W 80+ White 
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post #6 of 14
I think so.
Be sure to overclock your 7850, its a beast of a overclocker.

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post #7 of 14
Thread Starter 
Yeah I have my overclocked now just a small one to push it just over 1ghz cant remember memory but when iget home from work I will update my system specs on my profile but it plays BF3 & Crysis 2 with HiRes & DX11 just fine as is. but i think im gunna hold old and wait a lil bit as i have seen the price drop a little as always so hoping they will drop a little bit more.
    
CPUMotherboardGraphicsRAM
Phenom II X6 1090T GIGABYTE GA-970A-UD3P Inno3D GeForce GTX 970 iChiLL x4 Air Boss Ultra 4 x 4 GB DDR3 
Hard DriveHard DriveOptical DriveCooling
SanDisk SSD (SDSSDP-128G-G25) Western Digital Caviar Blue Samsung Super WriteMaster S-ATA 22X DVD-RW Antec Kühler H1200 PRO 
OSMonitorKeyboardPower
Windows 10 Pro 64-Bit Samsung SyncMaster B2230H Razer Blackwidow 2014 EVGA 600W 80+ White 
CaseMouseMouse PadAudio
Corsair Carbide 300r GAMEware Puntero XFX Warpad On barod  
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Phenom II X6 1090T GIGABYTE GA-970A-UD3P Inno3D GeForce GTX 970 iChiLL x4 Air Boss Ultra 4 x 4 GB DDR3 
Hard DriveHard DriveOptical DriveCooling
SanDisk SSD (SDSSDP-128G-G25) Western Digital Caviar Blue Samsung Super WriteMaster S-ATA 22X DVD-RW Antec Kühler H1200 PRO 
OSMonitorKeyboardPower
Windows 10 Pro 64-Bit Samsung SyncMaster B2230H Razer Blackwidow 2014 EVGA 600W 80+ White 
CaseMouseMouse PadAudio
Corsair Carbide 300r GAMEware Puntero XFX Warpad On barod  
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post #8 of 14
Ive seen people doing 1250mhz on it. It doesnt heat up alot. Its a great card

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post #9 of 14
Thread Starter 
Yeah I know but I havnt got round to pushing it yet as im super happy as its much better than my old Saphire HD 5850 Xtreame card I did have before.
    
CPUMotherboardGraphicsRAM
Phenom II X6 1090T GIGABYTE GA-970A-UD3P Inno3D GeForce GTX 970 iChiLL x4 Air Boss Ultra 4 x 4 GB DDR3 
Hard DriveHard DriveOptical DriveCooling
SanDisk SSD (SDSSDP-128G-G25) Western Digital Caviar Blue Samsung Super WriteMaster S-ATA 22X DVD-RW Antec Kühler H1200 PRO 
OSMonitorKeyboardPower
Windows 10 Pro 64-Bit Samsung SyncMaster B2230H Razer Blackwidow 2014 EVGA 600W 80+ White 
CaseMouseMouse PadAudio
Corsair Carbide 300r GAMEware Puntero XFX Warpad On barod  
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Phenom II X6 1090T GIGABYTE GA-970A-UD3P Inno3D GeForce GTX 970 iChiLL x4 Air Boss Ultra 4 x 4 GB DDR3 
Hard DriveHard DriveOptical DriveCooling
SanDisk SSD (SDSSDP-128G-G25) Western Digital Caviar Blue Samsung Super WriteMaster S-ATA 22X DVD-RW Antec Kühler H1200 PRO 
OSMonitorKeyboardPower
Windows 10 Pro 64-Bit Samsung SyncMaster B2230H Razer Blackwidow 2014 EVGA 600W 80+ White 
CaseMouseMouse PadAudio
Corsair Carbide 300r GAMEware Puntero XFX Warpad On barod  
  hide details  
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post #10 of 14
My pc still has a pentium 4 socket 478 and a 3850...
cant wait for xmas for a new build

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