PCIe bandwith question. (I don't get this at all and need help haha)

[Rafayellow]

If I use both PCIe 16x Generation 3 on this mobo:
 

ASUS Z97-A ATX 
http://www.amazon.com/ASUS-Z97--DDR3-2600-Motherboards/dp/B00K2MAU5Q/ref=sr_1_1?s=electronics&ie=UTF8&qid=1431569572&sr=1-1&keywords=Asus+z97

 

With a GTX760 (or any GPU for that matter) and the new Intel PCIe 4x Gen 3 SSD (http://www.newegg.com/Product/Product.aspx?Item=N82E16820167300) will I bottleneck either one?

Thanks guys!
 

[PoloGG]

I don't think it will work, since the i7-4790k only has 16 PCIe lanes, so your 2-way SLI will use those lanes (8x 8x), and there will be no lanes left for the SSD (4 lanes).

[ApolloX75]

If I use both PCIe 16x Generation 3 on this mobo:

 

ASUS Z97-A ATX 

http://www.amazon.com/ASUS-Z97--DDR3-2600-Motherboards/dp/B00K2MAU5Q/ref=sr_1_1?s=electronics&ie=UTF8&qid=1431569572&sr=1-1&keywords=Asus+z97

 

With a GTX760 (or any GPU for that matter) and the new Intel PCIe 4x Gen 3 SSD (http://www.newegg.com/Product/Product.aspx?Item=N82E16820167300) will i bottleneck aither one? I just know that in SLI the lanes become 8x and 8x and that got me really confused haha.

Thanks guys!

 

 

 

I don't think it will work, since the i7-4790k only has 16 PCIe lanes, so your 2-way SLI will use those lanes (8x 8x), and there will be no lanes left for the SSD (4 lanes).

 

I believe that SLI has a minimum requirement of 8X, but if not it will work. The X16 slots run direct to the CPU, true, and the X1 slots are run by the Z97 chipset. If you installed the two GTX 760's they'd run in X8/X8, but if you add a third device they will run X8/X4/X4. Whether or not SLI will work at X4 is something I can't remember. I think Crossfire will work at that speed but not SLI.

 

I'll see if I can find the answer in the meantime.

 

Also it won't "bottleneck" as PCIE 3.0 even at X4 is plenty fast.

 

*Edit: http://linustechtips.com/main/topic/221485-question-on-sli-pcie-lanes-dedicated-physx-card/

 

This cleared it up. SLI won't work at X4 but you certainly won't cause any issues running one card at X8 and the SSD at X4. But if you try and run a second 760 in SLI it won't work at X4.

[Aniallation]

With a GTX760 (or any GPU for that matter) and the new Intel PCIe 4x Gen 3 SSD (http://www.newegg.com/Product/Product.aspx?Item=N82E16820167300) will i bottleneck aither one? I just know that in SLI the lanes become 8x and 8x and that got me really confused haha.

Wait, so are you going to be using one 760, or two?

 

Whether or not SLI will work at X4 is something I can't remember. I think Crossfire will work at that speed but not SLI.

Unfortunately no. SLI requires x8

[Rafayellow]

Wait, so are you going to be using one 760, or two?

 

Unfortunately no. SLI requires x8

Sorry guys, I think I got you confused. Single GTX 760 and single PCIe SSD. Will each one work at full speed?

[ApolloX75]

Sorry guys, I think I got you confused. Single GTX 760 and single PCIe SSD. Will each one work at full speed?

Ha, ah ok.

 

The SSD will run at it's max X4 yes, the card will run at X8. X8 PCIE is more than fast enough for all but a Titan X, so you'll be fine lol.

[Aniallation]

Sorry guys, I think I got you confused. Single GTX 760 and single PCIe SSD. Will each one work at full speed?

The SSD will run at full speed, the GPU will be reduced to X8, but you won't notice a difference between X8 and X16 with a 760, or any current GPU tbh. It'll be perfectly fine.

 

The SSD will run at it's max X4 yes, the card will run at X8. X8 PCIE is more than fast enough for all but a Titan X, so you'll be fine lol.

Nope PCIe 3.0 X8 is still more then enough for a 295X2, which is more powerful than a Titan X.

[typographie]

Sorry guys, I think I got you confused. Single GTX 760 and single PCIe SSD. Will each one work at full speed?

 

My understanding (and someone may correct me) is that the lanes for your PCIe x4 slots are provided by the chipset and thus do not subtract from your CPU's 16 available lanes. As long as you don't put the SSD in one of your PCIe x16 slots it shouldn't take lanes away from your GTX 760.

 

That being said, 8 lanes of PCIe 3.0 will not measurably impede the performance of a video card. PCIe has astronomically high bandwidth and no cards really saturate it enough to "need" 16 lanes at this time.

[Rafayellow]

Thnk you very much guys. Helpful as hell!

[Brandonberg]

My understanding (and someone may correct me) is that the lanes for your PCIe x4 slots are provided by the chipset and thus do not subtract from your CPU's 16 available lanes. As long as you don't put the SSD in one of your PCIe x16 slots it shouldn't take lanes away from your GTX 760.

 

That being said, 8 lanes of PCIe 3.0 will not measurably impede the performance of a video card. PCIe has astronomically high bandwidth and no cards really saturate it enough to "need" 16 lanes at this time.

 

I believe the new Intel NVMe drives require PCIe Gen 3 X4 minimum to work. The PCIe lanes controlled by the PCH are only Gen 2 so cannot be used for these devices, hence on the Z97 must be connected via a PCIe Gen 3 Lane (CPU). (It may work on Gen 2 lanes, but if it did, it would be severely bottlenecked by the PCH.)

 

Another thing to note is that the M.2 Slot on the ASUS Z97-A is controlled via the PCH and shares bandwidth with the two PCIe 2.0 X1 slots for a total bandwidth of PCIe 2.0 x2. Therefore the 2.5" drive with M.2 adapter isn't supported on this (or im pretty sure most if not all) Z97 motherboards. The only option would be the PCIe card which may or may not be supported by the BIOS.