To expand on sk1939
's post mentioning the GA-Z77X-UD3H
-- meaning I'm trying to make it more clear for you, me
-- so please read slowly/thoroughly again --
First, see the zoomed in picture of the GA-Z77X-UD3H board
and read the silkscreening labels on each of the slots (either above or along the edge of the slot). I'll describe each slot to you, from RIGHT TO LEFT:
PCIEX1_1 -- PCIe x1 slot, supporting up to x1 speed
PCIEX16 -- PCIe x16 slot, supporting up to x16 speed
PCIEX1_2 -- PCIe x1 slot, supporting up to x1 speed
PCIEX1_3 -- PCIe x1 slot, supporting up to x1 speed
PCIEX8 -- PCIe x16 slot, supporting up to x8 speed
PCI -- standard PCI slot
PCIEX4 -- PCIe x16 slot, supporting up to x4 speed
We assume your graphics card requires one PCIe x16 slot and takes up 2 physical
backplane/chassis slots (this is common today), which means if it was installed in PCIEX16, it would physically block PCIEX1_2 from being used.
And if you install a PCIe x1 card in PCIEX8, your PCIEX16 slot drops to x8 speed, which you don't want either.
Following so far?
This board will meet your requirements without any speed loss/degradation
if you do the following:
* Install graphics card in PCIEX16
* Install PCIe x1 card in PCIEX1_1
* Install PCIe x1 card in PCIEX1_3
* Install PCIe x1 card in PCIEX4
How does this work / why this configuration?
1. By leaving slot PCIEX8 empty, this ensure PCIEX16 stays at x16 speed,
populate slot PCIEX4 with a x2, x4, x8, or x16 card -- otherwise you will disable/turn off the PCIEX1_1, PCIEX1_2, and PCIEX1_3 slots, since they share bandwidth with the PCIEX4 slot.
Finally, I should note this same configuration will work on the GA-Z77X-D3H (note the model string difference) too.--
Making life hard for others since 1977.
I speak for myself and not my employer/affiliates of my employer.