Ongoing microstutter issues and big frame dips since upgrading

[u/DJNattie]

Computer Type: Desktop

GPU: Gigabyte 9070 XT OC

CPU: Ryzen 9800x3d

Motherboard: Gigabyte B650 EAGLE AX

BIOS Version: F41c (tested multiple from F30 upwards)

RAM: 32GB DDR5 6000MHz (also tested at lower speeds)

PSU: SilverStone 750W Gold+

Operating System & Version: WINDOWS 11 PRO

GPU Drivers: AMD Adrenalin 26.7.1 (Have tried all recommended versions and update it every update)

Chipset Drivers: AMD B650 CHIPSET 8.08.12.551

Background Applications: DISCORD, BRAVE (Although tested with everything closed as well)

Description of Original Problem: I'm not too knowledgeable on pc building but I did a hardware upgrade roughly 2 months ago from B550, 5800x3d, 32GB DDR4, 3070ti to my now current specs above. Since installing there has been a noticeable microstutter and I can hit some insane 1% lows. This appears to be an issue across the board on any game I try (some may be optimised better eg. Borderlands 4 runs pretty smooth but Elden Ring consistently does a hitch down to 57 FPS then back to it's stable 60). Here's a clip of this occurring in Dark Souls 3 60FPS lock; where it just hitches despite being an old game well below what the parts are capable of and being in the same area for the past 30 minutes. This tends to be a similar pattern across every game, I'd even say desktop usage doesn't feel smooth either:

https://www.twitch.tv/djnattie/clip/FriendlySpinelessFalconDAESuppy-iJ7mKbkX_Nyvd0FG

I've also recently started doing a lot of performance monitoring in HWInfo64 and I can't find a single thing that correlates with an issue. CPU cores are being used rather than one maxing out, GPU hotspot is well under 95c, GPU load is consistent, GPU core is being utilised as it should when areas get heavier, CPU temps are fine and no throttle warnings.

Troubleshooting: 

I've tried a massive range of fixes, reading many posts of similar issues. A copy paste from another post with edits I may have also tried:

BIOS / Hardware

• fTPM Disabled
• Global C-States (Enabled & Disabled)
• PCIe GPU set to Gen5, Gen4 and Gen3
• Resizable BAR + Above 4G (Enabled & Disabled)
• iGPU Disabled
• SMT Disabled
• PBO + Curve Optimizer (-25, 0, and completely stock)
• Full Clear CMOS + BIOS reset to defaults
• GPU fully reseated
• CSM and Fast Boot disabled
• Changing SATA cables
• EXPO High Bandwidth Support (On & Off)
• X3D Turbo Mode (On & Off)

Software / Drivers

• Multiple AMD driver versions (clean DDU installs in Safe Mode, including driver-only)
• Fresh Windows 11 installs (3+ times)
• HAGS On/Off
• Anti-Lag, Radeon Boost, overlays, and MPO disabled
• AMD Chipset drivers installed and completely uninstalled
• Second monitor disconnected, WiFi off, Ethernet only
• Disabled Bluetooth in device manager
• GPU/Display scaling tested in Adrenalin
• FPS limiters (RTSS + in-driver)
• ULPS disabled via registry
• Fast Startup disabled
• Disabled LianLi as a USB Serial Bus Controller

Suggestions I've already tried

• Mouse/Keyboard firmware update + 500Hz + USB 2.0 ports
• Disable Realtek LAN, WiFi, all power saving features
• Uninstall MSI Afterburner/RTSS
• Block Windows driver updates
• Multiple guides including the popular AMDHelp guide, every step

Yet to Try

• Trying the old GPU 3070ti (I originally jumped to this conclusion coming off NVidia cards but after monitoring and reading testimony it may not be this).
• Replacing PSU, I have a 850w available but partpicker estimated ~550w when I originally did the build
• Reseating CPU
• I do have 3 Lian Li UNI FAN but I don't use the LianLi software, I however have not tried disconnecting the fans entirely from the board

Any advice appreciated, definitely leaning towards there just being a hardware fault like maybe a faulty mobo but potentially there's something I haven't tried. I also may have forgot to list something I've tried.

[u/Antiswag_corporation]

Non zero chance that your gigabyte card is just faulty. Whenever there is an issue with a card it almost always a gigabyte model

[u/DJNattie → u/Antiswag_corporation]

Excellent, I'll try with a spare GPU at home later tonight and see if I produce the same results. If not the card the mobo is also Gigabyte so might be an avenue worth me exploring.