Z77A-GD65 mobo PCIe speed question

This motherboard has 3 PCIe x16 slots and if there's a GPU in the first 2 slots they're supposed to both be x8 speed. GPU-Z reports the first slot x8, but the second slot only x4 speed. Latest BIOS and chipset drivers installed, on WIN 8.1 64 system. The CPU is only an i3-3240, which I just realized today only supports PCIe 2.0, but the mobo is still supposed to support both slots at x8 under PCIe 2.0.  I've attached a PDF with the CPU-Z and GPU-Z info. Is GPU-Z correct, mobo not support advertised specs or other?
Yes, GPUs are different, not using SLI. This system is used for running distributed computing apps, including CUDA and OpenCL on the GPUs. x8 vs x4 speed makes a difference with these apps.

Quote from: stevecole250 on 26-May-15, 21:02:58
I've updated my signature. Is there any other needed in it?
Using this mobo http://us.msi.com/product/mb/Z77AGD65.html#hero-overview
Using this GPU http://www.pny.com/gtx-960-2048mb-gddr5-pcie3-graphics-card?sku=VCGGTX9602XPB
And this GPU http://www.gigabyte.com/products/product-page.aspx?pid=4647#ov
I've switched the PCIe x16 slots the GPUs were in using just PCI_E2 and PCI_E5, the primary and secondary PCIe x16 slots. Nothing in any of the other PCIe slots. Will re-seat again though just to be sure.
oki
Quote
Will re-seat again though just to be sure.
tell the results when you test it

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    Quote from: stevecole250 on 26-May-15, 21:02:58
    I've updated my signature. Is there any other needed in it?
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    oki
    Quote
    Will re-seat again though just to be sure.
    tell the results when you test it

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