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5820K or 5930K, PCI Express Lanes?

post #1 of 5
Thread Starter 
I have the ASUS X99-E WS MB and it has a lot of PCIE 3.0 slots. I plan on getting the Gtx 980 TI but might only do a 2-way SLI at most further in the future but I plan on using all my PCIE slots. Right now I have the ASUS ThunderboltEX II/Dual card and the ASUS Dual-Band Wireless-AC1900 PCI-E Adapter. For the future, pcie USB 3.1 type A&C cards as well as a sound card. The 5820K has 28 PCI express lanes and the 5930K has 40. Would I be safe with the 5820K or should I get the 5930K?
post #2 of 5
I looked a bit on the ASUS site and a few reviews sites and it seems you can use the 5820K without any issues and get access to all PCIe slots at full bandwidth becasue the motherboard has integrated PLX switches:

"Moving towards the center of the X99-E WS, we can see the 7 PCI-E x16 slots. As you can see by the chart below, both 28 and 40 lane CPUs will be able to run up to a quad-SLI/CrossFireX setup with all the GPUs running at PCI-E 3.0 x16 speeds. This is possible because of the dual PLX chips found on the motherboard. This is great news for those that own a 28 lane i7 5820K processor! Just above the top PCI-E slot is a 6-pin power connector to feed additional power to the slots."

Source: http://www.overclockers.com/asus-x99ews-motherboard-review/

Obviously you should get the 5820K, the only advantage of the 5930K would be the PCIe lanes, but in this case the motherboard compensates.
Centurion
(14 items)
 
  
CPUMotherboardGraphicsRAM
Phenom II 940 @3.3GHz 1.25V Gigabyte 790X-DS4 XFX 5850 8GB OCZ DDR2-800 
Hard DriveCoolingOSMonitor
Corsair Force 3 TRUE Win 7 Pro x64 ACER 23" TN  
PowerCase
400W Silverstone Strider Antec P182 
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Centurion
(14 items)
 
  
CPUMotherboardGraphicsRAM
Phenom II 940 @3.3GHz 1.25V Gigabyte 790X-DS4 XFX 5850 8GB OCZ DDR2-800 
Hard DriveCoolingOSMonitor
Corsair Force 3 TRUE Win 7 Pro x64 ACER 23" TN  
PowerCase
400W Silverstone Strider Antec P182 
  hide details  
Reply
post #3 of 5
Thread Starter 
Thank you very much! : )
post #4 of 5
Motherboard multiplexes PCIe lanes, but there are still fewer lanes between GPUs and CPU in case of 5820k, so data transfer won't be as fast. In real-world scenarios that should not translate into any performance degradation though.
post #5 of 5
Thread Starter 
Thanks for the heads up.
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