Question PCIex4 and PCIex16 slots works only x1 line with Nvme PCIe adapter

Apr 11, 2019
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Hello,

i can't understand why my PCIex4 and PCIex16 slots works only x1 line and doesn`t use x4 with Nvme PCIe adapter. Is a bad adapter?

i puted adapter into gpu x16 slot, CrystalDiskInfo shows transfer: Current mode PCIe 3.0 x1 | supported mode PCIe 3.0 x4

and then i puted adapter into x4 slot, CrystalDiskInfo shows transfer: Current mode PCIe 2.0 x1 | supported mode PCIe 3.0 x4

then i puted video card Geforce GTX660 in x16 slot gpu-z shows PCIe v3.0 x16

Motherboard: Gigabyte GA-Z68AP-D3 rev 2.0 with latest UEFI beta bios, i tried and downgraded bios, disabled SATA ports, all PCIe slots are empty - same thing...
https://www.gigabyte.com/Motherboard/GA-Z68AP-D3-rev-20#sp

CPU: QuadCore Intel Core i5-3570

Disk: ADATA SX8200PNP PRO 1TB
http://www.xpg.com/us/specification/583

PCIe adapter ICY BOX IB-PCI214M2-HSL
https://www.raidsonic.de/en/index.php?we_objectID=5456
 
Apr 11, 2019
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all slots empty except nvme adapter, i use cpu vga... but AIDA64 shows:



USB3 and LAN adapter is integrated into the motherboard, disabled it in bios didn`t help...
 
1 x PCI Express x16 slot, running at x4 (PCIEX4)
* The PCIEX4 slot shares bandwidth with the PCIEX1_2 and PCIEX1_3 slots. When the PCIEX1_2 slot or the PCIEX1_3 slot is populated, the PCIEX4 slot will operate at up to x1 mode.
If you have discrete ethernet adapter in PCIE x1 slot, then x4 slot operates at x1 mode.
 
Apr 11, 2019
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Only thing that comes to mind is that the M.2 adapter could be defective. Do you have any other PC you could try it in?
I found same problem with this MOBO in win-raid.com forums... different disk and adapter, but same problem.. but there is no solution written, if any.
 
If it's a compatibility issue between that specific motherboard and specific adapter that's so weird. Sorry, don't know what else to try. I did notice that your BIOS is labelled as a beta, you could try a different, older one but I have no reason to think that'd fix anything.

Are there any settings in your BIOS relating to speed or power savings for PCIe?
 
Apr 11, 2019
10
1
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If it's a compatibility issue between that specific motherboard and specific adapter that's so weird. Sorry, don't know what else to try. I did notice that your BIOS is labelled as a beta, you could try a different, older one but I have no reason to think that'd fix anything.

Are there any settings in your BIOS relating to speed or power savings for PCIe?
no, only gpu slot (PEG) i can set from Auto to GEN1, GEN2 or GEN3. I tried all the options. BIOS downgrade also... thanks for your attention :)
 
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