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How to get full x16 bus on Z690 strix E gaming wi fi By vigorito

Vigorito

Vigorito

Vigorito

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Joined
22 Jul 2021
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182
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Belgrade
Hello,i have read Asus manual for this mobo if M2.1 slot is busy with a ssd,a pcieX 16 G5 (top gpu slot will be running x8) and thats okay,i insert m2 ssd into M2.1 ssd slot and Gpu in the middle slot (not the bottom one) pcieX 16 G3 and now im reading only pciex x4 1.1 from gpuz and nvidia control panel,so where i need to move ssd from m.21 slot to have full gpu bus in the middle slot to a m2 2 or m2 3,i want gpu to stay in the middle slot for ssd doesent matter anyway is covered with a heatsink

Screenshot-2022-02-18-12-12-52-206-com-google-android-apps-docs.jpg
 
Your post is a bit hard to read but I get the gist. Can you post a screenshot of what it says in GPUZ as well?

I'll take a a look and try an work out what the issue is but in the meantime I'll leave this here for people to see (your image is too blurry when zoomed in and you can't see the detail).


QJGFslS.jpg
 
It could just be a compatibility/read error with GPUZ and your motherboard. There's no reason why the PCi slot should drop like that. You should try running some benchmarks/play games that will soon tell you if your card is being throttled for bandwidth.
 
Never mind the manual but the Asus spec site says that when using the top M.2 slot, that the first PCIe slot - the 5.0 one - goes down from x16 to x8.

However, that is still better than running at x4.
https://rog.asus.com/motherboards/rog-strix/rog-strix-z690-e-gaming-wifi-model/spec
kgxdbMT.png

What is harder to see from even the zoomed in diagram is what the electrical is:
zBbghae.png

Middle might be x16 mechanical but only x4 electrical.
I guess Asus quite reasonable expect users to the top slot.
Since there aren't any PCIe 5.0 M.2 drives yet, I see no reason to not use the lower slot.
 
To use lower slot for ssd or gpu,mu current conf is now ssd is in the G5 upper slot and gpu in the middle slot G3 and im getting X4 for the gpu,im okay to insert m2 ssd in any m2 slot just i dont know can i get at least x8 in the middle gpu slot,i dont like aestet. When gpu is in a upper x16 5.0 slot
 
Intel® 12th Gen Processors*
1 x PCIe 5.0 x16 slot**
Intel® Z690 Chipset***
1 x PCIe 4.0 x16 slot (supports x4 mode or x4/x4 mode for ROG HYPER
M.2 CARD)
1 x PCIe 3.0 x16 slot (supports x4 mode)
1 x PCIe 3.0 x1 slot

According to this maybe lower slots are x4 electrical,im not sure
 
Why can't you use the top slot for the GPU? (Also since it's PCI-E 5.0, even when running at 8x, that's effectively the same as a PCI-E 4.0 16x Slot, so it will still offer more than enough bandwidth for any current GPU)

Also make sure you haven't got any PCI-E Bifurcation / Hyper .M2 Options turned on in the BIOS, as they may affect lane allocation
 
Well looking at the manual the two lower x16 slots will be limited to x4, you have to use the top slot for x8/x16. For best performance it seems GPU in the top x16 slot, and then the m.2 drive in either the first slot (which will drop the GPU to x8) or in the other two slots (which should keep the GPU at x16).
 
The CPU only has 16 usable PCIe lanes, these are shared between the top GPU slot and top M.2 slot. So if both are occupied the PCIe lanes will be split between them, 8X for the GPU and 8X for the drive.

These are not PCIe 5 because the GPU and M.2 drive are not PCIe 5, they are PCIe 4, so what you end up with is 8X PCIe 4 for the GPU if the top M,2 has a drive in it.

This is a bit mean on Intel's part, it should have 20 usable PCIe lanes but i guess they figure the CPU is big enough already so they need to save some die space.

Use the Chip-Set for the M.2, the bottom one, but its slower so if its a fast drive it will get a bit choked.

I'm using the CPU's PCIe lanes for both the GPU and drive, i don't have this problem :p
 
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