PCI lanes with 2 cards

Toggle sidebar Toggle sidebar
B

brianbrook

Commendable
Jan 9, 2017
4
0
1,510
I have had a 780 Ti in the only slot it will fit running x8 (specs say it is x16 slot?) I can live with that but when I added a 960 to the only remaining slot the 780 ti runs at x1 and the 960 at x4 and is recognized as the 0 card while the 780 Ti as 1, it actually slowed my graphics work down so I removed the 960 and plan to get a 1070 but if that runs at x4 as the main card isn't that defeating the purpose as the 780 Ti at x1 is much slower than it is now at x8? Lastly I know I need a motherboard that has more PCI lanes but trying to get by with this machine for a few more years!
 
Solution
greens
What is the rest of your rig like? The behavior is normal but unexpected given your story. What is the complete build? All added devices? Sound cards, wifi, etc - everything. Need to figure out where your PCIE lanes are being taken.

The 780 TI is the superior card. There is no benefit to running a 960 next to it at all.
Even if we figure out why you have so few PCIE lanes - the solution to your problem is still going to be

"Ditch the 960 and just use the 780 TI"
Sort by date Sort by votes
greens

greens

Splendid
Jan 27, 2012
3,773
7
26,965
What is the rest of your rig like? The behavior is normal but unexpected given your story. What is the complete build? All added devices? Sound cards, wifi, etc - everything. Need to figure out where your PCIE lanes are being taken.

The 780 TI is the superior card. There is no benefit to running a 960 next to it at all.
Even if we figure out why you have so few PCIE lanes - the solution to your problem is still going to be

"Ditch the 960 and just use the 780 TI"
 
Upvote 0 Downvote
Solution
B

brianbrook

Commendable
Jan 9, 2017
4
0
1,510
I installed the 960 just to test before I get a 1070, long story but I need the 780 Ti for Octane rendering and the 8 Gb of RAM in a 1070 for Redshift rendering, the only peripherals I have are M-Audio Axiom 25 keyboard and a Wacom Bamboo Fun but those aren't plugged in....how big a hit will I take running a 1070 at x4 and the 780 Ti at x1 is what I'm wondering especially because it is for rendering! Thanks!
 
Upvote 0 Downvote
greens

greens

Splendid
Jan 27, 2012
3,773
7
26,965
A big hit.

What board do you have? Something isn't right. There isn't a modern CPU out there that doesn't have at least 16 lanes available to it. Leaving you with x8 for two GPUs - Which they will run happily at. 4x, 1x - not so much... you're going to get some bottleneck.

Doesn't make sense that this is happening. You tell me that you don't have any devices.
" the only peripherals I have are M-Audio Axiom 25 keyboard and a Wacom Bamboo Fun but those aren't plugged in...."
But in your original post you said
"I added a 960 to the only remaining slot"
Why do you only have one available slot - THOSE are the devices i'm talking about.
 
Upvote 0 Downvote
B

brianbrook

Commendable
Jan 9, 2017
4
0
1,510
I removed the 960, only the 780 Ti is installed but Speccy is reporting ALL PCI-E lanes are in use.....one at x16 and the other 3 at x1....this makes no sense but maybe since the 780 Ti takes up 2 slots? it's a 4770 and the machine is a Lenovo M83 that I added a 700 Watt power supply and 32 gigs of RAM too.
 
Upvote 0 Downvote
B

brianbrook

Commendable
Jan 9, 2017
4
0
1,510
Yea, that's it..the 780 Ti barely fit in the first place as this motherboard isn't made for graphics, I can't figure out where those PCI-E lanes are going or they just aren't there....I need a performance motherboard for my next build but thanks for troubleshooting!
 
Upvote 0 Downvote
You must log in or register to reply here.

TRENDING THREADS

Latest posts

Moderators online

Share this page

COMPANY
RESOURCES
FOLLOW
Top Bottom