Does a 1x pcie port bottleneck gpu?

[Legolessed]

I found a mini itx board that only has 1 pcie  x1 port and that’s it. If I use a riser to mount a Radeon hd 5870 will there be a bottleneck in gaming?

[Valkyrie Lenneth]

most pcie 1x slots are tiny af, if u do have a wide slot with 1x yes it will be a huge bottleneck and some cards cant even boot up unless its 8x or higher

 

ive even had some cards that can only run in 16x mode

 

even if u manage to boot it up and get it running the 1x will bottleneck it hard

[Legolessed]

Just now, Valkyrie Lenneth said:

most pcie 1x slots are tiny af, if u do have a wide slot with 1x yes it will be a huge bottleneck and some cards cant even boot up unless its 8x or higher

 

ive even had some cards that can only run in 16x mode

 

even if u manage to boot it up and get it running the 1x will bottleneck it hard

K thanks!!!!

[Princess Luna]

obviously, 16 is a pretty much bigger number than 1

 

Honestly though you need at least 2.0 16x or 3.0 8x to make sure your card is not being limited by the PCI-e lane itself.

[Droidbot]

For a 5870 it'll be fine.

 

https://www.techpowerup.com/reviews/AMD/HD_5870_PCI-Express_Scaling/25.html

 

Take a read. If the board has PCIE 3.0 that's a bonus too

[Valkyrie Lenneth]

4 minutes ago, Droidbot said:

For a 5870 it'll be fine.

 

https://www.techpowerup.com/reviews/AMD/HD_5870_PCI-Express_Scaling/25.html

 

Take a read. If the board has PCIE 3.0 that's a bonus too

25-30% bottleneck only on the pci lane isnt really 'fine' its a huge bottleneck by the lanes only

[light-v]

1 hour ago, Droidbot said:

For a 5870 it'll be fine.

 

https://www.techpowerup.com/reviews/AMD/HD_5870_PCI-Express_Scaling/25.html

 

Take a read. If the board has PCIE 3.0 that's a bonus too

1x takes a big hit in performance so not really. 

 

Also the HD 5870 came out before PCI-E 3.0. Most boards are PCI-E 2.1 at best. 

[Droidbot]

7 hours ago, Valkyrie Lenneth said:

25-30% bottleneck only on the pci lane isnt really 'fine' its a huge bottleneck by the lanes only

Never said it was optimal, just fine.

 

If there is an Intel HD device onboard, OP could use an Nvidia GPU like the 660 or something cheap from Fermi, and then enable Optimus through drivers to allow for link compression, which can give him double to 3 times the performance of a normal PCIe X1 2.0 by heavily compressing the data going over the bus.

[Legolessed]

5 hours ago, Droidbot said:

Never said it was optimal, just fine.

 

If there is an Intel HD device onboard, OP could use an Nvidia GPU like the 660 or something cheap from Fermi, and then enable Optimus through drivers to allow for link compression, which can give him double to 3 times the performance of a normal PCIe X1 2.0 by heavily compressing the data going over the bus.

The only reason I’m using a hd 5870 is because I already have one. If I didn’t I would probably get a 660 or 480 or something like that from nvidia. But I want ruse this card lol