Why am I running on PCIe 2.0 when all my components support PCIe 3.0?

Loby_The_Pirate · Feb 15, 2014

So every time I boot my machine it states that it is running PCIe 2.0 compatibility mode, but all of my components state that they support PCIe 3.0. Does anyone know what my problem might be?

System:
OS: Windows 7 SP1 Ultimate x86-64
Motherboard: MSI Big Bang-XPower II
Processor: Intel i7-3930k
Graphics: Radeon 7950 (FX-795A-TDFC)
RAM: 4 x 8GB G.SKILL Sniper (PC3 12800)
Primary Drive: Intel 330 240 GB (SSDSC2CT240A3K5)

Danzas4321 · Feb 15, 2014

The CPu is sandy bridge, its onboard controller doesnt support PCi-e 3.0 . Ivy bridge-3 Broguth that to the Lga 2011 socket

coozie7 · Feb 15, 2014

Try running the GPUZ (excellent freebie BTW) render test (on the first info pane hover the mouse pointer over the blue '?' beside the PCI-E info box and click to activate the test).
My 7950 shows it runs at version 1.1 when idle but it jumps to the correct x16@2.0 (my mobo only supports PCI-E 2.0) under the test.

Loby_The_Pirate · Feb 15, 2014

Danzas4321 :

I'm reading up about the issue and it appears to be a way to force 3.0, do you know how I might do that?

Loby_The_Pirate · Feb 15, 2014

coozie7 :

Neat Feature, it unfortunately says "PCI-E 3.0 x 16 @ x16 2.0"

Danzas4321 · Feb 15, 2014

Unfortunately no as i think Sandy bridge e is only PCi-e 2.0. Honestly the difference between 2.0 and 3.0 is like 3% which is miniscule

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Why am I running on PCIe 2.0 when all my components support PCIe 3.0?

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