Mobile GPU only using 8 PCI lanes, can we make it use 16?

[jarblater]

I am using a Lenovo Ideapad y500 with a single GeForce GT 750m and an i7 3630QM.

I confirmed that my CPU has 16 lanes here: http://ark.intel.com/products/71459/

Here is a link to my GPU-Z Validation showing only 8x PCI-E lanes during the render test: http://www.techpowerup.com/gpuz/hyx6v/

I want to make all of the 16 PCI-E lanes my CPU has dedicated to the GPU. With that, I have four questions which may help solve this. Thank you for taking the time to read this, and further thanks for any help, in advance.

1. Is this possible, even if I have to disable WIFI, sound, etc.?

2. Does this indicate I have a bad driver?

3. Would the 750m even utilize the bandwidth provided by 16 PCI-e lanes? Or, does PCI-E 2.0 x8 provide sufficient bandwidth to not bottleneck the it?

4. Would disabling all other hardware connected to a PCI-E lane via device manager dedicate all the PCI-E lanes to the GPU?

Thanks for reading everyone, I appreciate any and all feedback! 😉
Jarblater

 

[Cons29]

i am not sure what you can do on laptops, but usually, these lanes gets to be shared with other hardware that is why they are only half of what they really are.

but that being a 750m, i dont think it will matter, if that was a 780 (whatever the mobile counterpart is) then maybe.
not an expert, but that is what i think

 

[jarblater]

Thanks for the reply😉

I didn't want to get my hopes up too high for this, but maybe I would be pleasantly surprised. No harm in asking, right 😉

Thanks again

 

[jaguarskx]

I wouldn't worry about it since the GT 750m is not powerful enough to make use of more than 8 PCI-e lanes.

The GT 750m is less powerful than the desktop Radeon HD 7750 DDR5 which many people believe is the minimum card you should buy for a budget gaming rig.

 

[Avro Arrow]

Even powerful desktop GPUs don't really use more than 8 lanes. That's why Crossfire or SLI at x8/x8 doesn't really hurt performance.