Question RTX 3070 only running at PCIe 4.0 x8 when it says it supports PCIe 4.0 x16 ?

[poorbugger]

I already resitted the gpu and started the render test using gpu z too but It's still only running at x8. I'm not sure if it has always been like this but i just noticed it today.

Motherboard: Asus tuf b550m plus gaming
Cpu: Ryzen 5 3600
GPU: Asus tuf gaming rtx 3070
PSU: Cx550m

Edit: I'm not sure if this matters but i also have another 2 SSDs installed on my system. One's with OS installed and the other just for storage.

 

[Lutfij]

GPU: Asus tuf gaming rtx 3070
PSU: Cx550m
Why are you running that GPU with that PSU? You're advised to use a 750W reliably built unit. If you were working with a couple of generations ago architecture for GPU's you'd have been able to get away with a lower wattage PSU.

Outside of that, BIOS version for your motherboard at this moment of time?

 

[poorbugger]

GPU: Asus tuf gaming rtx 3070
PSU: Cx550m
Why are you running that GPU with that PSU? You're advised to use a 750W reliably built unit. If you were working with a couple of generations ago architecture for GPU's you'd have been able to get away with a lower wattage PSU.

Outside of that, BIOS version for your motherboard at this moment of time?

Thanks for the reply. I asked around forums when i first got the gpu whether that psu will be okay for the system since it's pretty much new. Most said okay and i measured the power draw from the wall as well and it didnt go over 400w if i remembered correctly. It's been almost 2 years now and so far everything is working fine.

Anyway the bios version is
SMBIOSBIOSVersion
1004

 

[Lutfij]

Anyway the bios version is
SMBIOSBIOSVersion
1004
^

TUF GAMING B550M-PLUS｜Motherboards｜ASUS Global

TUF Gaming series distills essential elements of the latest AMD and Intel® platforms, and combines them with game-ready features and proven durability. Engineered with military-grade components, an upgraded power solution and a comprehensive set of cooling options, this motherboard delivers...

www.asus.com

I count 10 BIOS updates pending(if you exclude the Beta versions).

It's been almost 2 years now and so far everything is working fine.
There are numerous instances of people with artifacting displays and GPU's that needed RMA'ing. This video should add some context;

View: https://youtu.be/wnRyyCsuHFQ

 

[Karadjgne]

CX-M is basically tied with the the VS as bottom of the barrel for Corsair, or possibly Underneath the barrel, depending on how you look at it.

How you haven't suffered blackscreens or shutdowns during games is beyond me to figure out, the transient load spikes coming from the gpu can reach 200w ish, putting you beyond rated power if pulling 400w ish although that's from the wall, so just over 300w internally.

Which means if you've got 75w in motherboard, 65w in cpu, that's 150w±, so the gpu is only pulling @ 150w. That's power limited for that card, it should be pulling 220-250w, or roughly 400-450w internally, 600w from the wall. (before spikes).

When a pc can hit 650w with a transient load spike, there's a reason why a 3070 should have a decent 750w psu, a very decent 650w if running a Ryzen 65w cpu. At a minimum.

 

[Colif]

do any of these answers go anywhere towards actually answering the question?

Does PSU power affect how many lanes a GPU will use?

BIOS update might maybe. You wouldn't think so.

NO WAY was this the solve.... I literally just took out my GPU for the THIRD TIME but this time I blew out the PCIe on the mother board and lightly cleaned the gold connectors with Isopropyl. BAM running at x16 gen 4.

[SOLVED] - SOLVED!!! Why is my 3070 ti only using x8 PCIe lanes?

I noticed on GPU-Z and in BIOS that my GPU was set at x16 4.0 but running only at x8 4.0. I tried to stress test the GPU with kombuster and GPU-Z but no change. I removed all other expansion cards and only have my M.2 boot drive in. I have all high performance modes on and have checked the PCIE...

forums.tomshardware.com

 

[poorbugger]

do any of these answers go anywhere towards actually answering the question?

Does PSU power affect how many lanes a GPU will use?

BIOS update might maybe. You wouldn't think so.

[SOLVED] - SOLVED!!! Why is my 3070 ti only using x8 PCIe lanes?

I noticed on GPU-Z and in BIOS that my GPU was set at x16 4.0 but running only at x8 4.0. I tried to stress test the GPU with kombuster and GPU-Z but no change. I removed all other expansion cards and only have my M.2 boot drive in. I have all high performance modes on and have checked the PCIE...

forums.tomshardware.com

Thank you for the suggestion but i saw the post earlier and took it out and clean the pcie on the gpu, doesnt seem to change anything. I'll try blowing the pcie lane on the mobo with compressed air later. I'm not sure about whether if i should update my bios since i've been told to only update when necessary

 

[Karadjgne]

I think now kinda qualifies as necessary. For the most part, with older Intel and FX cpus, that was pretty much very true, if the bios worked, don't mess with it, because it was far, far too easy to brick the bios. But newer bios have much better coded instructions for replacement, so the chances of bricking a bios have become almost zero if you follow the procedure as outlined on the website.

Most bios bricks now are user caused, either impatience or not understanding that you really just need to let it do its thing.