2080ti Gpu-z says running at pciex8?

[4K8KW10]

hi

am a little confused with m.2 drives with regard to pcie lanes for gfx card.

Have an Asus z370-prime motherboard with a 500gb m.2 at top of motherboard and a Sabrent m.2 drive at lower part of motherboard. I have read that the lower Sabrent drive stops the use of one of sata ports.

My 2080 is in the upper pciex16 slot on the motherboard.

Is the gfx card sharing lanes with the m.2 at top and if so why is the bottom one connected to the sata ports? Gpu-z reports the 2080 as only using pciex8.

Am quite confused - how do I run my 2080 in pciex16 and use both my drives?

I also have a problem, quite often win10 will be in an awful low res when boot up and initially nzxt see's no display device but after a min or so the screen will go black before screen returns and in native 2560x1440p res. Anything I can do to fix?

Many thanks for help, much appreciate.

Hi,

I have checked your board's specifications at https://www.asus.com/Motherboards/PRIME-Z370-P/specifications/ and as far as it states, it seems that the only way you can limit the bandwidth of the primary PCIe 3.0 slot is when you enable CrossFire with two videocards. Your board supports AMD's Radeon CrossFire.

Since this, I think GPU-Z is buggy and not reporting the bandwidth properly, so either get rid of this particular utility, or try the board with a Radeon and see whether it will continue to report x8.

 

[malccy]

Just checked gpu-z tonight and now showing my 2080ti as pcieX4 !

 

[wookiee87]

Just checked gpu-z tonight and now showing my 2080ti as pcieX4 !

have you moved the card down a slot? when you have gpu z up start the render test within it, this will show the max link speed, it may be x4 due to power saving settings, or you've changed something in the bios by mistake

 

[malccy]

have you moved the card down a slot? when you have gpu z up start the render test within it, this will show the max link speed, it may be x4 due to power saving settings, or you've changed something in the bios by mistake

No, I have kept the card in the top slot and I start the render test within gpu-z.

 

[wookiee87]

No, I have kept the card in the top slot and I start the render test within gpu-z.

check the nvidia control pannel within windows and change the power plan form optimal/ataptive to high performance and see what happens, failing that somethings changed in the bios, so your best bet is to load optimized defaults, just a heads up doing this will reset all custom settings made by you so if there are fan profiles you've set maybe wotrth writing them down, or any other settings you want to keep, including boot order.

if your up for a look around the bios then yor best bet would be to head into it via advanced mode and look for PCH confiiguration, within this scetion you should be able to manually set link speed for the gpu in pcie slot 1, gen 3 is what you want to select, bear in mind that because of the m.2 between the cpu and gpu you'll be limited to x8 max speed.

there may be extra settings to tweak in Platform Misc Configuration but i'm not familar with intel stuff, i moved to amd for the first time a few months ago and havent looked back, as a fail safe if you do go into the bios and change items that dont work just head back in and restore defaults, at this point dont forget to set boot drives again as not doing so may result in no boot until configured properly

 

[4K8KW10]

But, but

My slow and crappy integrated Vega 8 does take all the 16 lanes. Sometimes, I think that incompetence at the hardware vendors is at an all-time peak.
Why ???
Precious PCIe lanes wasted for stupid integrated Vega, while the M.2 slot works only with SATA drives!