Overclock.net › Forums › Graphics Cards › AMD/ATI › Radeon HD 7970 crossfire mobo decision help...
New Posts  All Forums:Forum Nav:

Radeon HD 7970 crossfire mobo decision help...

post #1 of 6
Thread Starter 
So I am getting most of my parts ready and plan on running 2 7970s in crossfire, along with a 3 monitor eyefinity setup. I am going to be running them on an intel platform but not exactly sure if the pci-e 3.0 on the 2011 boards will be worth while... I have seen benchmarks showing little performance difference between 2.0 and 3.0 with single monitor setups, but since I am going to be running eyefinity, is 3.0 recommended? Of course the 7970 is a 3.0 card, but will I be safe going with an lga1155 socket and then in the future swapping out the i5 for the new ivy bridge?
post #2 of 6
7070 doesnt need PCIE-3.0 anyway as it doesnt saturate PCIE 2.0 so its not a real factor in your decision, just make sure the board you buy can run at least x8 on the 2nd card, idealy x16.

Beware - if you fancy going Tri-Fire, there are very few boards that will do it. I had to change mine today for taht very reason.
My old one was only about 3 weeks old. frown.gif
post #3 of 6
Quote:
Originally Posted by Tbenni88 View Post

So I am getting most of my parts ready and plan on running 2 7970s in crossfire, along with a 3 monitor eyefinity setup. I am going to be running them on an intel platform but not exactly sure if the pci-e 3.0 on the 2011 boards will be worth while... I have seen benchmarks showing little performance difference between 2.0 and 3.0 with single monitor setups, but since I am going to be running eyefinity, is 3.0 recommended? Of course the 7970 is a 3.0 card, but will I be safe going with an lga1155 socket and then in the future swapping out the i5 for the new ivy bridge?


For Eyefinity, I would select LGA2011 X79 board with at least 2x PCIe @x16/x16 to see the full potential of 2 7970s. It's not about PCIe 2.0 or 3.0 but the PCIe lanes @x16/x16. 

ケンジ
(16 items)
 
  
CPUCPUMotherboardGraphics
i7-3960X i7-980X GA-X79-UD7 / GA-X58A-UD9 7970 + 465 
GraphicsRAMRAMHard Drive
2x 6990 + 580 16GB 2133 MHz 24GB 2000 MHz 120GB x 2 RAID0 
Hard DriveHard DriveCoolingCooling
120GB x 4 RAID0 Raptor 300GB x 2 RAID0 CPU-370 CPU-370 
CoolingCoolingOSPower
VID-AR699 EK FB X58A-UD9 Win 7 Ultimate x64 1500W / 1250W+1200W 
  hide details  
Reply
ケンジ
(16 items)
 
  
CPUCPUMotherboardGraphics
i7-3960X i7-980X GA-X79-UD7 / GA-X58A-UD9 7970 + 465 
GraphicsRAMRAMHard Drive
2x 6990 + 580 16GB 2133 MHz 24GB 2000 MHz 120GB x 2 RAID0 
Hard DriveHard DriveCoolingCooling
120GB x 4 RAID0 Raptor 300GB x 2 RAID0 CPU-370 CPU-370 
CoolingCoolingOSPower
VID-AR699 EK FB X58A-UD9 Win 7 Ultimate x64 1500W / 1250W+1200W 
  hide details  
Reply
post #4 of 6
Thread Starter 
Quote:
Originally Posted by Ken1649 View Post



For Eyefinity, I would select LGA2011 X79 board with at least 2x PCIe @x16/x16 to see the full potential of 2 7970s. It's not about PCIe 2.0 or 3.0 but the PCIe lanes @x16/x16. 

ah yeah that was what I was thinking. Was originally looking at the asus p9x79 pro, 8gb of gskill 1600 ripjaws, and the i7 3820... Of course you shouldn't base a build on the pci-e but I have always had good experiences with basing my builds around the gpu. No matter what, money is always going to be an issue but I was intending to build a crossfire gaming rig, so I know my numbers so far...
post #5 of 6
Quote:
Originally Posted by Tbenni88 View Post

Quote:
Originally Posted by Ken1649 View Post



For Eyefinity, I would select LGA2011 X79 board with at least 2x PCIe @x16/x16 to see the full potential of 2 7970s. It's not about PCIe 2.0 or 3.0 but the PCIe lanes @x16/x16. 

ah yeah that was what I was thinking. Was originally looking at the asus p9x79 pro, 8gb of gskill 1600 ripjaws, and the i7 3820... Of course you shouldn't base a build on the pci-e but I have always had good experiences with basing my builds around the gpu. No matter what, money is always going to be an issue but I was intending to build a crossfire gaming rig, so I know my numbers so far...


I think you should if we are talking about High resolution Eyefinity and Crossfire. A single monitor 2560x1600 and below is not a concern.

 

This test was very oled with GTX480. Fast card 7970 will need more of a PCIe x16 lanes.

 

Conclusion GTX 480 SLI PCIe Bandwidth Perf. - x16/x16 vs. x8/x8

 

 

Motherboad and PSU are my priority for high end balance system for high resolution. 

ケンジ
(16 items)
 
  
CPUCPUMotherboardGraphics
i7-3960X i7-980X GA-X79-UD7 / GA-X58A-UD9 7970 + 465 
GraphicsRAMRAMHard Drive
2x 6990 + 580 16GB 2133 MHz 24GB 2000 MHz 120GB x 2 RAID0 
Hard DriveHard DriveCoolingCooling
120GB x 4 RAID0 Raptor 300GB x 2 RAID0 CPU-370 CPU-370 
CoolingCoolingOSPower
VID-AR699 EK FB X58A-UD9 Win 7 Ultimate x64 1500W / 1250W+1200W 
  hide details  
Reply
ケンジ
(16 items)
 
  
CPUCPUMotherboardGraphics
i7-3960X i7-980X GA-X79-UD7 / GA-X58A-UD9 7970 + 465 
GraphicsRAMRAMHard Drive
2x 6990 + 580 16GB 2133 MHz 24GB 2000 MHz 120GB x 2 RAID0 
Hard DriveHard DriveCoolingCooling
120GB x 4 RAID0 Raptor 300GB x 2 RAID0 CPU-370 CPU-370 
CoolingCoolingOSPower
VID-AR699 EK FB X58A-UD9 Win 7 Ultimate x64 1500W / 1250W+1200W 
  hide details  
Reply
post #6 of 6
Thread Starter 
Quote:
Originally Posted by Ken1649 View Post



I think you should if we are talking about High resolution Eyefinity and Crossfire. A single monitor 2560x1600 and below is not a concern.

This test was very oled with GTX480. Fast card 7970 will need more of a PCIe x16 lanes.

Conclusion GTX 480 SLI PCIe Bandwidth Perf. - x16/x16 vs. x8/x8


Motherboad and PSU are my priority for high end balance system for high resolution. 

Ah I see what you mean. Pretty much confirmed what I was thinking. As far as the mobo goes, I can't decide weather the asus p9x79 or the asus p9x79 pro would be the better option. As I stated above, I am going to pick up the i7 3820 and OC it... As far as the OC functionality goes I would hazard to guess the OC performance for the CPU/RAM and GPU's are quite similar if not the same for both boards? I know since the i7 3820 is not an unlocked chip, I will probably be capped at 4.7 or so(Which is quite high)...
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: AMD/ATI
Overclock.net › Forums › Graphics Cards › AMD/ATI › Radeon HD 7970 crossfire mobo decision help...