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Intel Expansion Options for pci express from cpu to gpu

I was looking at my specs, I have mobos that have 16x pcie same with a video cards .


4770k Expansion Options

PCI Express Revision 3.0
PCI Express Configurations ‡ Up to 1x16, 2x8, 1x8/2x4
Max # of PCI Express Lanes 16

This processor has pci express 4x4
Intel® Xeon® Processor X5450
(12M Cache, 3.00 GHz, 1333 MHz FSB)

When I was looking at xeon processors and some other old ones it does not have specs for the Expansion Options how do I know the cpu can do the full 16x speeds and would the X5450 just run 4x speed even if it was on a 16x mobo and how can I see those specs if not listed for I can tell if the process can do 4x or 8x or 16x at 1.0 or 2.0 or 3.0 revision.
3 answers Last reply Best Answer
More about intel expansion options pci express cpu gpu
  1. I dont really understand what you are asking?
  2. I called intel they helped me out
    Cpu to Gpu Expansion Options for full 16x support


    http://ark.intel.com/products/75123/Intel-Core-i7-4770K-Processor-8M-Cache-up-to-3_90-GHz?q=4770k

    Expansion Options 4770k

    PCI Express Revision 3.0
    PCI Express Configurations ‡ Up to 1x16, 2x8, 1x8/2x4

    Max # of PCI Express Lanes 16 <----

    So this only has 16 lanes for the gpu and if you run 2 cards they will only have x8 lanes from the cpu to the gpus


    http://ark.intel.com/products/64595/Intel-Xeon-Processor-E5-2670-20M-Cache-2_60-GHz-8_00-GTs-Intel-QPI


    Intel® Xeon® Processor E5-2670


    Expansion Options
    (20M Cache, 2.60 GHz, 8.00 GT/s Intel® QPI)
    PCI Express Revision 3.0
    Max # of PCI Express Lanes 40 <----

    This has 40 lanes so you could run two 16x lanes from the cpu to the gpu and another gpu at 8x
  3. Best answer
    Oh right, yes thats correct. I didnt know exactly what you were asking.

    The Socket 2011 i7s also have 40 lanes, like the 4930k 3830k etc
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