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PCI Express Scaling Game Performance Analysis review
Posted by: on: 02/19/2015 09:17 AM [
54 comment(s) ]
Join us in a review where we look into the PCIe slot in Gen 1.1, 2.0 and 3.0 configurations as we measure performance versus single and Multi-GPU solution. Will that outdated slot configuration really have a huge impact on today's high-end graphics cards ?
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fantaskarsef
Senior Member
Posts: 10937
Senior Member
Posts: 10937
Posted on: 02/19/2015 10:34 AM
As always, thanks for picking up such basic topics Hilbert
As always, thanks for picking up such basic topics Hilbert
TheDeeGee
Senior Member
Posts: 6200
Senior Member
Posts: 6200
Posted on: 02/19/2015 10:39 AM
Would have loved to see 8x Results aswell.
I'm bound to 8x with my current Setup.
Would have loved to see 8x Results aswell.
I'm bound to 8x with my current Setup.
fantaskarsef
Senior Member
Posts: 10937
Senior Member
Posts: 10937
Posted on: 02/19/2015 10:49 AM
Would have loved to see 8x Results aswell.
I'm bound to 8x with my current Setup.
Maybe I'm wrong, but wouldn't you just be able to take PCIe 2.0 16x as a reference then? Or am I misunderstanding?
Would have loved to see 8x Results aswell.
I'm bound to 8x with my current Setup.
Maybe I'm wrong, but wouldn't you just be able to take PCIe 2.0 16x as a reference then? Or am I misunderstanding?
iancook221188
Senior Member
Posts: 1720
Senior Member
Posts: 1720
Posted on: 02/19/2015 10:50 AM
loved this review and would love to see the corssfire review may be with X8 2.0 aswell because i think alot of people are running this, the results would prob be the same as gen 1.1 X16
im running my 780's with gen 2.0 at x8 im wondering if there getting restricted
loved this review and would love to see the corssfire review may be with X8 2.0 aswell because i think alot of people are running this, the results would prob be the same as gen 1.1 X16
im running my 780's with gen 2.0 at x8 im wondering if there getting restricted
DiceAir
Senior Member
Posts: 1350
Senior Member
Posts: 1350
Posted on: 02/19/2015 11:04 AM
Would like to see a test with crossfire
Would like to see a test with crossfire
rl66
Senior Member
Posts: 2174
Senior Member
Posts: 2174
Posted on: 02/19/2015 11:22 AM
Would have loved to see 8x Results aswell.
I'm bound to 8x with my current Setup.
more or less 2.0 x8 is the same as 1.1 x16
Would have loved to see 8x Results aswell.
I'm bound to 8x with my current Setup.
more or less 2.0 x8 is the same as 1.1 x16
rl66
Senior Member
Posts: 2174
Senior Member
Posts: 2174
Posted on: 02/19/2015 11:31 AM
About the "why use the 5*** i7?" it's to have the limit of the port, with a lower CPU you would have the CPU limitation added (2x8 or 1 x16) this way you get rid of any other thing that can influence the test.
don't forget it was to test the port ONLY.
now that we have seen SLI i can't wait to see Xfire too.
could be interesting to see the technologic difference on the port use.
About the "why use the 5*** i7?" it's to have the limit of the port, with a lower CPU you would have the CPU limitation added (2x8 or 1 x16) this way you get rid of any other thing that can influence the test.
don't forget it was to test the port ONLY.
now that we have seen SLI i can't wait to see Xfire too.
could be interesting to see the technologic difference on the port use.
k3vst3r
Senior Member
Posts: 3351
Senior Member
Posts: 3351
Posted on: 02/19/2015 11:54 AM
Article needs show three cards an crossfire too. NV cards cope better with less pci-e bandwidth.
Basically if you covered three cards an tri-fire 290x the article would be golden.
Article needs show three cards an crossfire too. NV cards cope better with less pci-e bandwidth.
Basically if you covered three cards an tri-fire 290x the article would be golden.
stevevnicks
Senior Member
Posts: 1441
Senior Member
Posts: 1441
Posted on: 02/19/2015 12:00 PM
quote
"f this article invokes enough interest, then in the future we'll also spend some time testing AMDs latest Radeon cards in Crossfire. With the Crossfire bridge removed all composing data now runs over the PCIe bus. That should place more load on bandwidth usage and that could have an impact on performance. So if there is enough interest, we'll dedicate at one point an article to that combo as well."
yea that would be some nice data, be good to see the difference with how AMD cards fair.
quote
"f this article invokes enough interest, then in the future we'll also spend some time testing AMDs latest Radeon cards in Crossfire. With the Crossfire bridge removed all composing data now runs over the PCIe bus. That should place more load on bandwidth usage and that could have an impact on performance. So if there is enough interest, we'll dedicate at one point an article to that combo as well."
yea that would be some nice data, be good to see the difference with how AMD cards fair.
k3vst3r
Senior Member
Posts: 3351
Senior Member
Posts: 3351
Posted on: 02/19/2015 12:06 PM
quote
"f this article invokes enough interest, then in the future we'll also spend some time testing AMDs latest Radeon cards in Crossfire. With the Crossfire bridge removed all composing data now runs over the PCIe bus. That should place more load on bandwidth usage and that could have an impact on performance. So if there is enough interest, we'll dedicate at one point an article to that combo as well."
yea that would be some nice data, be good to see the difference with how AMD cards fair.
Yeah this what on about, theirs more reliance on pci-e bandwidth on AMD cards with removal of the bridge, since communication is fully done across the pci-e lanes.
quote
"f this article invokes enough interest, then in the future we'll also spend some time testing AMDs latest Radeon cards in Crossfire. With the Crossfire bridge removed all composing data now runs over the PCIe bus. That should place more load on bandwidth usage and that could have an impact on performance. So if there is enough interest, we'll dedicate at one point an article to that combo as well."
yea that would be some nice data, be good to see the difference with how AMD cards fair.
Yeah this what on about, theirs more reliance on pci-e bandwidth on AMD cards with removal of the bridge, since communication is fully done across the pci-e lanes.
stevevnicks
Senior Member
Posts: 1441
Senior Member
Posts: 1441
Posted on: 02/19/2015 12:10 PM
how are you tri firing with the Hero VI ? 1x295 and 1 x 290 ? because you have to disable all the pcie x1 ports to use the 3rd pcie 16 slot port at its max of x4 or it will only work at x1
Yeah this what on about, theirs more reliance on pci-e bandwidth on AMD cards with removal of the bridge, since communication is fully done across the pci-e lanes.
how are you tri firing with the Hero VI ? 1x295 and 1 x 290 ? because you have to disable all the pcie x1 ports to use the 3rd pcie 16 slot port at its max of x4 or it will only work at x1
Hilbert Hagedoorn
Don Vito Corleone
Posts: 36306
Don Vito Corleone
Posts: 36306
Posted on: 02/19/2015 12:15 PM
Article needs show three cards an crossfire too. NV cards cope better with less pci-e bandwidth.
Basically if you covered three cards an tri-fire 290x the article would be golden.
I'll probably look into Crossfire as well. 3-way multi-GPU (regardless of SLI or Crossfire) however poses an issue as the slots configuration even on X99 / 5960X would change to X16 / X16 / X8.
Article needs show three cards an crossfire too. NV cards cope better with less pci-e bandwidth.
Basically if you covered three cards an tri-fire 290x the article would be golden.
I'll probably look into Crossfire as well. 3-way multi-GPU (regardless of SLI or Crossfire) however poses an issue as the slots configuration even on X99 / 5960X would change to X16 / X16 / X8.
k3vst3r
Don Vito Corleone
Posts: 3351
Don Vito Corleone
Posts: 3351
Posted on: 02/19/2015 12:21 PM
It has three 16x slots, basically using 16x slots that run at 8x pci-e 3.0. Then the bottom slot which is 4x pci-e 2.0 only. It works but I know it's suffering performance hit for doing so.
how are you tri firing with the Hero VI ? 1x295 and 1 x 290 ? because you have to disable all the pcie x1 ports to use the 3rd pcie 16 slot port at its max of x4 or it will only work at x1
It has three 16x slots, basically using 16x slots that run at 8x pci-e 3.0. Then the bottom slot which is 4x pci-e 2.0 only. It works but I know it's suffering performance hit for doing so.
stevevnicks
Senior Member
Posts: 1441
Senior Member
Posts: 1441
Posted on: 02/19/2015 12:21 PM
yea three way x16 x16 x8 will skew the test ... unless everything was set at x8 for tri setup ? i dont know funny one that one
unless try 16x x16 x8 vs 8x 8x 8x to see the difference ?
i done some testing years ago using the Asus M3A32-MVP DELUXE wi/fi Editon and 4x 3870 i dont know why 3d mark says only 1 card but it had 4 cards in there.
http://www.3dmark.com/3dm06/10054832
http://www.hardwareheaven.com/community/threads/crossfire-x8-x4-and-gaming.227980/
I'll probably look into Crossfire as well. 3-way multi-GPU (regardless of SLI or Crossfire) however poses an issue as the slots configuration even on X99 / 5960X would change to X16 / X16 / X8.
yea three way x16 x16 x8 will skew the test ... unless everything was set at x8 for tri setup ? i dont know funny one that one
unless try 16x x16 x8 vs 8x 8x 8x to see the difference ?
i done some testing years ago using the Asus M3A32-MVP DELUXE wi/fi Editon and 4x 3870 i dont know why 3d mark says only 1 card but it had 4 cards in there.
http://www.3dmark.com/3dm06/10054832
http://www.hardwareheaven.com/community/threads/crossfire-x8-x4-and-gaming.227980/
k3vst3r
Senior Member
Posts: 3351
Senior Member
Posts: 3351
Posted on: 02/19/2015 12:40 PM
Technically could show it as 16x 16 x8, then as 8x 8x 8x on same pci-e 3.0. This would give base figure to move forward with. Then reduce it down to pci-e 2.0, then further down to gen 1 pci-e.
With 3 cards though it's same for everyone, their limited to 40x pci-e anyway. So it would reflect real life tests anyway.
Technically could show it as 16x 16 x8, then as 8x 8x 8x on same pci-e 3.0. This would give base figure to move forward with. Then reduce it down to pci-e 2.0, then further down to gen 1 pci-e.
With 3 cards though it's same for everyone, their limited to 40x pci-e anyway. So it would reflect real life tests anyway.
Pale Rider
Member
Posts: 81
Member
Posts: 81
Posted on: 02/19/2015 12:46 PM
You're preaching to the choir, Hilbert.
The people that come to Guru3D are the very people that crave that extra 3 to 5% gain and will do whatever it takes to get it. Regardless of what you or anyone else says.
We've all been raised to demand those extra few performance points from birth onwards.
It's like telling a slalom skier that those few extra milliseconds really don't matter. Or a drag racer the same thing.
We crave speed above all else in this hobby. We're obsessed with performance.
Other than that, a good read. To be chuckled over and quickly forgotten surely.
But, it is good to stretch our minds every once in a while, though.
I'm curious as to how well bridgeless crossfire works and when/if it can be implemented with Nvidia cards.
You're preaching to the choir, Hilbert.
The people that come to Guru3D are the very people that crave that extra 3 to 5% gain and will do whatever it takes to get it. Regardless of what you or anyone else says.
We've all been raised to demand those extra few performance points from birth onwards.
It's like telling a slalom skier that those few extra milliseconds really don't matter. Or a drag racer the same thing.
We crave speed above all else in this hobby. We're obsessed with performance.
Other than that, a good read. To be chuckled over and quickly forgotten surely.
But, it is good to stretch our minds every once in a while, though.
I'm curious as to how well bridgeless crossfire works and when/if it can be implemented with Nvidia cards.
stevevnicks
Senior Member
Posts: 1441
Senior Member
Posts: 1441
Posted on: 02/19/2015 12:56 PM
so where do you plug your sound card? i have same motherboard if you use the 2 16 slots at x8 and 3rd at x4 then all the PCIe x1 ports are disabled so the 3rd 16 slot can run at x4 ?
It has three 16x slots, basically using 16x slots that run at 8x pci-e 3.0. Then the bottom slot which is 4x pci-e 2.0 only. It works but I know it's suffering performance hit for doing so.
so where do you plug your sound card? i have same motherboard if you use the 2 16 slots at x8 and 3rd at x4 then all the PCIe x1 ports are disabled so the 3rd 16 slot can run at x4 ?
TheDeeGee
Senior Member
Posts: 6200
Senior Member
Posts: 6200
Posted on: 02/19/2015 01:01 PM
I run at 8x Gen3, but i guess that's less than 1% difference compared to 16x.
more or less 2.0 x8 is the same as 1.1 x16
I run at 8x Gen3, but i guess that's less than 1% difference compared to 16x.
stevevnicks
Senior Member
Posts: 1441
Senior Member
Posts: 1441
Posted on: 02/19/2015 01:01 PM
You're preaching to the choir, Hilbert.
The people that come to Guru3D are the very people that crave that extra 3 to 5% gain and will do whatever it takes to get it. Regardless of what you or anyone else says.
We've all been raised to demand those extra few performance points from birth onwards.
It's like telling a slalom skier that those few extra milliseconds really don't matter. Or a drag racer the same thing.
We crave speed above all else in this hobby. We're obsessed with performance.
Other than that, a good read. To be chuckled over and quickly forgotten surely.
But, it is good to stretch our minds every once in a while, though.
I'm curious as to how well bridgeless crossfire works and when/if it can be implemented with Nvidia cards.
scrub that lol sozz read it wrong
You're preaching to the choir, Hilbert.
The people that come to Guru3D are the very people that crave that extra 3 to 5% gain and will do whatever it takes to get it. Regardless of what you or anyone else says.
We've all been raised to demand those extra few performance points from birth onwards.
It's like telling a slalom skier that those few extra milliseconds really don't matter. Or a drag racer the same thing.
We crave speed above all else in this hobby. We're obsessed with performance.
Other than that, a good read. To be chuckled over and quickly forgotten surely.
But, it is good to stretch our minds every once in a while, though.
I'm curious as to how well bridgeless crossfire works and when/if it can be implemented with Nvidia cards.
scrub that lol sozz read it wrong
k3vst3r
Senior Member
Posts: 3351
Senior Member
Posts: 3351
Posted on: 02/19/2015 01:25 PM
bingo, had revert to onboard soundcard for tri-fire
so where do you plug your sound card? i have same motherboard if you use the 2 16 slots at x8 and 3rd at x4 then all the PCIe x1 ports are disabled so the 3rd 16 slot can run at x4 ?
bingo, had revert to onboard soundcard for tri-fire
stevevnicks
Senior Member
Posts: 1441
Senior Member
Posts: 1441
Posted on: 02/19/2015 01:29 PM
just wondered because it says in your sound card part SB X-FI Titanium , which i thought od that cant be right lol
just wondered because it says in your sound card part SB X-FI Titanium , which i thought od that cant be right lol
ruiner13
Senior Member
Posts: 145
Senior Member
Posts: 145
Posted on: 02/19/2015 02:11 PM
The highest bus usage I've seen on my rig with 780s in SLI at 3.0x16 is 45%, and that was during the Monster Hunter benchmark. I'm guessing at 2.0x16 that it would be near maxed. Any chance you could do a test with that benchmark, Hilbert?
The highest bus usage I've seen on my rig with 780s in SLI at 3.0x16 is 45%, and that was during the Monster Hunter benchmark. I'm guessing at 2.0x16 that it would be near maxed. Any chance you could do a test with that benchmark, Hilbert?
Cave Waverider
Senior Member
Posts: 888
Senior Member
Posts: 888
Posted on: 02/19/2015 02:44 PM
I'd like to see the bridgeless CrossfireX tests. Also, I'd like to see 8x and 4x tests on single cards and SLi/CrossfireX.
4x single card would be interesting to see how much of an impact it would have to run a state of the art video card with Alienware Graphics amplifier for their newest line of laptops which only runs at 4x.
I'd like to see the bridgeless CrossfireX tests. Also, I'd like to see 8x and 4x tests on single cards and SLi/CrossfireX.
4x single card would be interesting to see how much of an impact it would have to run a state of the art video card with Alienware Graphics amplifier for their newest line of laptops which only runs at 4x.
Fox2232
Senior Member
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Senior Member
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Posted on: 02/19/2015 02:59 PM
If I buy new graphics card for $700 and it would under perform by 3%, I would not go and buy new intel system with PCIe 3.0 x16 for another $800.
If I needed more graphical power, I would simply go and buy 2nd GPU for another $700.
And I would laugh as this would be under performing by 10%, but would still provide 80% higher performance of guy who got 1 GPU + 1 extra modern MB+CPU+Memory.
If I buy new graphics card for $700 and it would under perform by 3%, I would not go and buy new intel system with PCIe 3.0 x16 for another $800.
If I needed more graphical power, I would simply go and buy 2nd GPU for another $700.
And I would laugh as this would be under performing by 10%, but would still provide 80% higher performance of guy who got 1 GPU + 1 extra modern MB+CPU+Memory.
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Member
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The results are pretty much what was expected comparing x16 throughout the generation. Still there are plenty of x16+x4 SLI/CF gaming motherboards and it should have been fun to see what is the actual loss there.