Question Is my PCIe Gen 3 x16 mobo bottlenecking my Ryzen 5800X3D CPU and 7800 XT GPU ?

[Peugart]

I currently have a Tomahawk b450, and upgraded my cpu a couple of years back from a 2700x to a 5800x3d. I have since updated my gtx 2070 to an RX 5800XT. When I run benchmarks with 3dMark, it shows that my hardware combo is bottom 28% of similar spec'd PCs. Link below.
https://www.3dmark.com/spy/54527570

I know almost nothing about overclocking, is it likely that my rig is rated low in 3dmark because most who use 3dmark oc their setup?
I am running everything with default case fans, a Hyper 212 CPU fan with Thermal Grizzly Kryonaut, and default case fans. The case could use a cleaning, but I don't believe overheating is the issue - admittedly I could be wrong.
Specs
MSI Tomahawk b450
MSI MPG A850G
AMD Ryzen™ 7 5800X3D
XFX Speedster SWFT210 Radeon RX 7800XT
Patriot Memory Viper Elite II DDR4 32GB(2 x 16GB) 4000MHz
Crucial P3 Plus 2TB PCIe Gen4 3D NAND NVMe M.2 SSD, up to 5000MB/s - CT2000P3PSSD8

Thank you all in advance.

 

[SkyNetRising]

but I don't believe overheating is the issue - admittedly I could be wrong.

Then check cpu and gpu temperatures during idle and load.
Use MSI afterburner.

Can you show a photo of your system with side panel removed?
(upload to imgur.com and post link)

 

[Peugart]

Then check cpu and gpu temperatures during idle and load.
Use MSI afterburner.

Can you show a photo of your system with side panel removed?
(upload to imgur.com and post link)

Yes, I will post an update tomorrow, as I have work tomorrow morning. Thank you!

 

[MEMOFLEX]

I currently have a Tomahawk b450, and upgraded my cpu a couple of years back from a 2700x to a 5800x3d. I have since updated my gtx 2070 to an RX 5800XT. When I run benchmarks with 3dMark, it shows that my hardware combo is bottom 28% of similar spec'd PCs. Link below.
https://www.3dmark.com/spy/54527570
I know almost nothing about overclocking, is it likely that my rig is rated low in 3dmark because most who use 3dmark oc their setup?
I am running everything with default case fans, a Hyper 212 CPU fan with Thermal Grizzly Kryonaut, and default case fans. The case could use a cleaning, but I don't believe overheating is the issue - admittedly I could be wrong.
Specs below
MSI Tomahawk b450
MSI MPG A850G
AMD Ryzen™ 7 5800X3D
XFX Speedster SWFT210 Radeon RX 7800XT
Patriot Memory Viper Elite II DDR4 32GB(2 x 16GB) 4000MHz
Crucial P3 Plus 2TB PCIe Gen4 3D NAND NVMe M.2 SSD, up to 5000MB/s - CT2000P3PSSD8

Thank you all in advance.

Are you running the memory at 4000? If so you may actually be hurting performance as the ratio between the memory speed and the cpu infinity fabric will not be optimal. Ideally you want no faster than 3600 memory with c16. You dont need ti change your memory kit but reducing the speeds down may actually improve performance

 

[Peugart]

Update - I've been tinkering with ram speed settings and Resize Bar all day, and have only managed to make my PC run worse on 3dmark.
My ram is currently set to 3200hz with A-XMP OC mode off. I tested with resize bar on and off, and with various ram speed settings with A-XMP OC on. Honestly, I couldn't get my pc to be stable past 3200hz, perhaps due to my MOBO supporting the following ram speeds:
Supports 1866/ 2133/ 2400/ 2667Mhz (by JEDEC)
Supports 2667/ 2800/ 2933/ 3000/ 3066/ 3200/ 3466 MHz (by A-XMP OC MODE)

Honestly, I'm very much considering now just buying an ASUS B550-F ROG Strix so that I don't have to mess with OC settings, as that mobo natively has PCIE 4.0 and supports up to 4400MHz in OC mode. My temps in my most recent 3dmark test showed and AVG GPU temp of 60c, with an AVG CPU temp of 71c, which I don't think is too crazy.
Thoughts gents? And thank you both for the replies.

 

[Why_Me]

Update - I've been tinkering with ram speed settings and Resize Bar all day, and have only managed to make my PC run worse on 3dmark.
My ram is currently set to 3200hz with A-XMP OC mode off. I tested with resize bar on and off, and with various ram speed settings with A-XMP OC on. Honestly, I couldn't get my pc to be stable past 3200hz, perhaps due to my MOBO supporting the following ram speeds:
Supports 1866/ 2133/ 2400/ 2667Mhz (by JEDEC)
Supports 2667/ 2800/ 2933/ 3000/ 3066/ 3200/ 3466 MHz (by A-XMP OC MODE)

Honestly, I'm very much considering now just buying an ASUS B550-F ROG Strix so that I don't have to mess with OC settings, as that mobo natively has PCIE 4.0 and supports up to 4400MHz in OC mode. My temps in my most recent 3dmark test showed and AVG GPU temp of 60c, with an AVG CPU temp of 71c, which I don't think is too crazy.
Thoughts gents? And thank you both for the replies.

PCPartPicker Part List

Motherboard: *Gigabyte B550 EAGLE WIFI6 ATX AM4 Motherboard ($89.99 @ Amazon)
Total: $89.99
Prices include shipping, taxes, and discounts when available
*Lowest price parts chosen from parametric criteria
Generated by PCPartPicker 2025-08-16 01:03 EDT-0400

PCPartPicker Part List

Motherboard: *Gigabyte B550 AORUS ELITE AX V2 ATX AM4 Motherboard ($109.99 @ Newegg)
Total: $109.99
Prices include shipping, taxes, and discounts when available
*Lowest price parts chosen from parametric criteria
Generated by PCPartPicker 2025-08-16 01:04 EDT-0400

 

[Peugart]

PCPartPicker Part List

Motherboard: *Gigabyte B550 EAGLE WIFI6 ATX AM4 Motherboard ($89.99 @ Amazon)
Total: $89.99
Prices include shipping, taxes, and discounts when available
*Lowest price parts chosen from parametric criteria
Generated by PCPartPicker 2025-08-16 01:03 EDT-0400

PCPartPicker Part List

Motherboard: *Gigabyte B550 AORUS ELITE AX V2 ATX AM4 Motherboard ($109.99 @ Newegg)
Total: $109.99
Prices include shipping, taxes, and discounts when available
*Lowest price parts chosen from parametric criteria
Generated by PCPartPicker 2025-08-16 01:04 EDT-0400

Thank you for the recs, based off of price I think I'll go with the B550 Aorus! You're all awesome, thank you all for the advice.

 

[MEMOFLEX]

Update - I've been tinkering with ram speed settings and Resize Bar all day, and have only managed to make my PC run worse on 3dmark.
My ram is currently set to 3200hz with A-XMP OC mode off. I tested with resize bar on and off, and with various ram speed settings with A-XMP OC on. Honestly, I couldn't get my pc to be stable past 3200hz, perhaps due to my MOBO supporting the following ram speeds:
Supports 1866/ 2133/ 2400/ 2667Mhz (by JEDEC)
Supports 2667/ 2800/ 2933/ 3000/ 3066/ 3200/ 3466 MHz (by A-XMP OC MODE)

Honestly, I'm very much considering now just buying an ASUS B550-F ROG Strix so that I don't have to mess with OC settings, as that mobo natively has PCIE 4.0 and supports up to 4400MHz in OC mode. My temps in my most recent 3dmark test showed and AVG GPU temp of 60c, with an AVG CPU temp of 71c, which I don't think is too crazy.
Thoughts gents? And thank you both for the replies.

The board upgrade will offer a few upgrades but trying to run the memory at 4000 is a fools errand really. Can you post a link to the memory you have? If its the one I found then the timings are not great.

Just want to temper expectations as even with a new board 4000 will still likely give you less performance than 3600 with tight timings.

 

[Peugart]

The board upgrade will offer a few upgrades but trying to run the memory at 4000 is a fools errand really. Can you post a link to the memory you have? If its the one I found then the timings are not great.

Just want to temper expectations as even with a new board 4000 will still likely give you less performance than 3600 with tight timings.

Patriot Memory Viper Elite II... https://www.amazon.com/dp/B0957WH8Q7?ref=ppx_pop_mob_ap_share

I know nothing about ram timings, my brain sees big number and goes brrrr. My hope is also that the pcie slots on the new mobo will marginally improve my gpu/cpu performance, as my current mobo is pcie 3. Also another m.2 slot sounds very nice. My simian brain just sees benchmarks that are bottom 32 to bottom 18% of my gpu/cpu combo and it irks me thinking that the oldest part of my build might be hampering the newest and most expensive parts of my build. Thank you for taking the time to reply and research!

 

[MEMOFLEX]

Patriot Memory Viper Elite II... https://www.amazon.com/dp/B0957WH8Q7?ref=ppx_pop_mob_ap_share

I know nothing about ram timings, my brain sees big number and goes brrrr. My hope is also that the pcie slots on the new mobo will marginally improve my gpu/cpu performance, as my current mobo is pcie 3. Also another m.2 slot sounds very nice. My simian brain just sees benchmarks that are bottom 32 to bottom 18% of my gpu/cpu combo and it irks me thinking that the oldest part of my build might be hampering the newest and most expensive parts of my build. Thank you for taking the time to reply and research!

Oh there are some quality of life upgrades that you will get with the new board. You will likely not notice the pcie upgrade but the additional m2 slot is certainly a nice to have. There may be some memory stability improvements as well.

There may be some tinkering to be done with the memory speed still but report back once you get the board and people can assist as required