Intel 750 SSD link speed

[npelov]

I recently got intel 750 series SSD and I replaced my MB with P8Q77-M with my Intel i7 2600 CPU to have x4 PCIe socket. The SSD works just fine, but in bios it says Negotiated Speed Gen.1. Speed is 600-700 MB/s for bulk read/write (500 if I do raw disk read test with HD Tune) which seems fine for gen.1 but the MB and the cpu should support PCIe Gen.2, right?

Yes, I do have graphics installed on the x16 PCIe, but I'm not in game it shouldn't be using all the PCIe lanes, right? 

 

Here is a screenshot of SSD toolbox showing that it's indeed link speed 1

 

[KenSoftTH]

If i remember correctly, No, ur graphic card will take the pcie lanes no matter what u r doing

[AshleyAshes]

PCIE devices will lower their link speed to conserve energy and bring it up when actually in demand.  This is why GPU-Z has a little benchmark and a question mark icon for showing the link speed to help users understand.  I imagine this is the same case.

[npelov]

4 hours ago, AshleyAshes said:

PCIE devices will lower their link speed to conserve energy and bring it up when actually in demand.  This is why GPU-Z has a little benchmark and a question mark icon for showing the link speed to help users understand.  I imagine this is the same case.

I tried opening SSD toolbox during read speed test - same result. Is it possible that the motherboard doesn't support gen.2 speed on the x4 slot? The spec doesn't tell the speed of each slot individually.

 

Is it possible to lower the x16  slot lanes to x8 to see if there will be a difference?After all the CPU only supports 16 lanes and 4 of them are multiplexed with the HDD.

[npelov]

I tested the link speed of the graphics card and the ssd. Indeed the graphics card idles at 2.5 GT/s and when rendering it's 5.0 GT/s. The ssd however does not go to 5.0 GT/s during speed test. Maybe it's the cable. I'll try the old windows trick - on/off, in/out, unplug/replug all the cables (it's not a PCI card, it's U.2 with M.2 converter cable and PCI x4 expansion card) .... or it could be the expansion card - it's Roline PCIe 3.0 x4 to M.2 adapter

 

[NelizMastr]

Your chipset supports PCIe 3.0 actually, only with an Ivy Bridge CPU, though. 

 

On the Asus website, it says PCIe 3.0/2.0 on the 16x slot, and no version number is mentioned for the 4x slot. It's safe to assume that's running

from the PCH at 1.1 speeds.

For reference:

https://www.asus.com/Motherboards/P8Q77M/specifications/