16X

[zedselder]

i asked this before here on this site a couple of month ago and no one gave me a correct answer so i will ask it again and hope that someone answer me this time
how can the ASUS X99-E WS Run 4-way SLI/CF GPU's on 16X PCIe 3.0 lanes all of them even when using 40 lane CPU and please don't tell me they run 16X/8X/8X/8X coz i sent them an email and they confirmed me that yes 4 GPU's will run 16X/16X/16X/16X
thanks

[TheGamingBarrel]

i asked this before here on this site a couple of month ago and no one gave me a correct answer so i will ask it again and hope that someone answer me this time

how can the ASUS X99-E WS Run 4-way SLI/CF GPU's on 16X PCIe 3.0 lanes all of them even when using 40 lane CPU and please don't tell me they run 16X/8X/8X/8X coz i sent them an email and they confirmed me that yes 4 GPU's will run 16X/16X/16X/16X

thanks

It would run at 16/8/8/8 or 8/8/8/8.

[Glenwing]

i asked this before here on this site a couple of month ago and no one gave me a correct answer so i will ask it again and hope that someone answer me this time

how can the ASUS X99-E WS Run 4-way SLI/CF GPU's on 16X PCIe 3.0 lanes all of them even when using 40 lane CPU and please don't tell me they run 16X/8X/8X/8X coz i sent them an email and they confirmed me that yes 4 GPU's will run 16X/16X/16X/16X

thanks

They use PCI Express switches to operate all cards in x16 mode, but the total amount of bandwidth available for communication is still 40 lanes' worth.

[zedselder]

It would run at 16/8/8/8 or 8/8/8/8.

please look at the site its says 16/16/16/16 and i sent them an email and they told me that yes it will run 16/16/16/16

[runit3]

i asked this before here on this site a couple of month ago and no one gave me a correct answer so i will ask it again and hope that someone answer me this time

how can the ASUS X99-E WS Run 4-way SLI/CF GPU's on 16X PCIe 3.0 lanes all of them even when using 40 lane CPU and please don't tell me they run 16X/8X/8X/8X coz i sent them an email and they confirmed me that yes 4 GPU's will run 16X/16X/16X/16X

thanks

On-board PLX chip (a pair of them I believe)

Here's an explanation if you need more:

https://www.pugetsystems.com/parts/Motherboard/Asus-X99-E-WS-10664

[zedselder]

They use PCI Express switches to operate all cards in x16 mode, but the total amount of bandwidth available for communication is still 40 lanes' worth.

thank you finally someone answered me

so can anyone buy this switch

[Glenwing]

thank you finally someone answered me

so can anyone buy this switch

It's not an add-on component, it's an integral part of the motherboard design, just as much as the X99 chipset itself.

[runit3]

thank you finally someone answered me

so can anyone buy this switch

It runs like a switch, but it is soldered into the board. You can't install them into any board, the board has to be manufactured and designed with the PLX chips.

[zedselder]

They use PCI Express switches to operate all cards in x16 mode, but the total amount of bandwidth available for communication is still 40 lanes' worth.

 

 

On-board PLX chip (a pair of them I believe)

Here's an explanation if you need more:

https://www.pugetsystems.com/parts/Motherboard/Asus-X99-E-WS-10664

so if we have 2 pc's with the same specs buy one running 16/16/16/16 and one 16/8/8/8 will there be any difference in fps of a games for example

[DildorTheDecent]

These chips allow four cards to run at 16x speed. As thought they are 8747s

[runit3]

so if we have 2 pc's with the same specs buy one running 16/16/16/16 and one 16/8/8/8 will there be any difference in fps of a games for example

On PCIe 3.0, no.

The bigger question would be why do you believe having quad SLI is necessary? 2 Titan X's at 4k res is going to be about all the performance you can get ATM. Scaling above 2 GPU's is horrible, and this would also assume the game you're playing supports SLI, which not all games do.

[Glenwing]

so if we have 2 pc's with the same specs buy one running 16/16/16/16 and one 16/8/8/8 will there be any difference in fps of a games for example

No, there's no difference between PCIe 3.0 x4, x8, or x16 for gaming except that SLI is not allowed on x4 links (artificial restriction imposed by NVIDIA for no reason), although you can hack around it. CrossFire is ok.

[TheGamingBarrel]

No, there's no difference between PCIe 3.0 x4, x8, or x16 for gaming except that SLI is not allowed on x4 links (artificial restriction imposed by NVIDIA for no reason), although you can hack around it. CrossFire is ok.

Can crossfire be done on a 1 X?

[Glenwing]

Can crossfire be done on a 1 X?

Yes, it can be done technically, but most motherboards' x1 slots are blocked off so longer cards won't fit. Most x1 slots also do not use the primary lanes from the CPU, so you'd be stuck on gen1 or gen2 which would cause some big performance issues.

[zedselder]

On PCIe 3.0, no.

The bigger question would be why do you believe having quad SLI is necessary? 2 Titan X's at 4k res is going to be about all the performance you can get ATM. Scaling above 2 GPU's is horrible, and this would also assume the game you're playing supports SLI, which not all games do.

well thats not my pc for sure and im not a big fan of the "the scaling is bad so dont get it" if it adds to performance then it adds something otherwise why would intel do 6 and 8 cores cpu if people believe that 4 is ok and enough  

 

No, there's no difference between PCIe 3.0 x4, x8, or x16 for gaming except that SLI is not allowed on x4 links (artificial restriction imposed by NVIDIA for no reason), although you can hack around it. CrossFire is ok.

thanks

[runit3]

well thats not my pc for sure and im not a big fan of the "the scaling is bad so dont get it" if it adds to performance then it adds something otherwise why would intel do 6 and 8 cores cpu if people believe that 4 is ok and enough  

SLI does not scale the way CPU's scale. It does not always add to performance, it can even take performance away in some games.

Adding cores is a linear increase, there will always be a benefit to adding cores if your applications will use them. Having an 8 core (real 8 cores) for gaming is just as senseless as having 4 GPU's.