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GTX 670 Sli x16 vs x8

post #1 of 4
Thread Starter 
I received my RIVE yesterday. I have two 670 FTW that I will be watercooling. Noobishly, I didn't know that the second 16x lane was actually the 4th lane down (I had imagined that it would be the second lane for some unknown reason). The manual recommended that for the best sli configuration that I will be using both the 1st and 4th lane (16x/16x)... however I had already bought a sli water bridge that will only fit the first two lanes.

How important is utilizing both 16x lanes in sli? I could go into the hassle of returning the bridge and being refunded the amount -(20% due to restocking)... but then I would have to purchase a 3-way sli bridge and plug the 2 holes for the missing card. This is a real son of a b, but totally my fault for not researching.

I went with ek gpu blocks and dual parallel bridge. Ek does sell a dual bridge for 3 slots... but it won't utilize 16x/16x. Thoughts?
Edited by Arock5504 - 1/27/13 at 9:18am
post #2 of 4
You're performance hit will be nil. Do you have a Sandy bridge or Ivy bridge processor? Ivy bridge has PCIe 3.0 which has double the bandwidth of 2.0. Which means your 16x would be like 32x PCIe 2.0 and your 8x would be like 16x.
post #3 of 4
Quote:
Originally Posted by absoluteloki89 View Post

You're performance hit will be nil. Do you have a Sandy bridge or Ivy bridge processor? Ivy bridge has PCIe 3.0 which has double the bandwidth of 2.0. Which means your 16x would be like 32x PCIe 2.0 and your 8x would be like 16x.
He has Sandy Bridge-E, it says in the OP wink.gif
There is little to no difference between x16 and x8 PCIe 3.0, maybe 1 or 2 percent in benchmarks but you won't notice it while gaming.
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CPUMotherboardGraphicsRAM
Intel Core i7-3770K @ 4.3GHz Gigabyte GA-Z77X-UD5H ASUS GeForce GTX 980 Ti STRIX 6GB @ 1500MHz 2x8GB Kingston HyperX Fury DDR3 @ 2400MHz 
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CPUGraphicsRAMHard Drive
Intel Xeon E5-2620 v4 @ 3GHz Matrox G200eH2 4x8GB Kingston Dual Rank ECC DDR4 @ 2133MHz 2x Samsung PM863 120GB in RAID1 
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Define
(20 items)
 
   
CPUMotherboardGraphicsRAM
Intel Core i7-3770K @ 4.3GHz Gigabyte GA-Z77X-UD5H ASUS GeForce GTX 980 Ti STRIX 6GB @ 1500MHz 2x8GB Kingston HyperX Fury DDR3 @ 2400MHz 
Hard DriveHard DriveCoolingCooling
Samsung 840 Pro 256GB Crucial MX100 512GB Noctua NH-U14S 3x Noctua NF-A14 FLX 
OSMonitorMonitorKeyboard
Windows 10 Pro 64-bit Dell U2713HM Dell U2312HM Ducky Shine 3 Year of the Snake (MX Brown) 
PowerCaseMouseMouse Pad
EVGA SuperNOVA P2 650W Fractal Design Define R5 Black Mionix Naos 7000 SteelSeries QcK 
AudioAudioAudioOther
Sennheiser HD 650 Fostex TH-X00 Ebony Parasound Zdac TP-LINK Archer T9E  
CPUGraphicsRAMHard Drive
Intel Xeon E5-2620 v4 @ 3GHz Matrox G200eH2 4x8GB Kingston Dual Rank ECC DDR4 @ 2133MHz 2x Samsung PM863 120GB in RAID1 
Hard DriveOS
4x WD Red 3TB in RAID5 ESXi 6.5 
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post #4 of 4
Thread Starter 
Thanks guys! I'll worry a little less... down the road I'll save money and prolly update.
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