F5F Stay Refreshed Hardware Desktop Performance peaks during Vsync or frame limit settings.

Performance peaks during Vsync or frame limit settings.

Performance peaks during Vsync or frame limit settings.

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vmontero1109
Junior Member
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11-03-2025, 05:34 AM
#1
I’ve observed fluctuating frame times and spikes in several titles I’ve played. Attempting to cap the framerate with scopebuddy actually worsened the problem. Over the past couple of years, I haven’t played much on my PC, though I remember running Arch back in 2022/2023 without issues. After switching to Windows between 2023 and 2025, AMD’s drivers made me hesitant. I tried various settings using Scopebuddy’s interface, but it works with any game. I checked Doom Eternal’s performance metrics, and adjusting refresh rates or framerate limits increased CPU and GPU usage compared to leaving them unlocked or using VRR. Since VRR doesn’t enforce a cap, I’m not really relying on it. I know my hardware has plenty of capacity.

While troubleshooting, I disabled scopebuddy, opened Doom Eternal, and even turned v-sync off—it still caused issues on my ViewSonic XG3220 (4K60). ‘PROTON_LOG=1’ didn’t write to my folder, but Steam and Eternal launched through the console. My guess is that the GPU and CPU aren’t syncing properly. A Reddit thread mentioned RDNA2 struggles with bottlenecks; my 6700 XT runs on an older CPU via PCI-E 3, yet less demanding games still perform well.

Any advice or leads would be greatly appreciated. I’m open to checking but running low on options.

System details:
- Motherboard: ASRock H170 Pro4S ATX
- Power Supply: EVGA SuperNOVA 650 G3 650W (80+ Gold)
- OS: Linux 6.17.7-ba14.fc43.x86_64
- CPU: Intel i7-6700K @ 4.20 GHz
- GPU: AMD Radeon RX 6700 XT
- RAM: 7.37 GiB / 15.55 GiB (77%)
- Storage: 19.70 GiB / 931.51 GiB (2%)
- Display: 3840x2160 @ 60 Hz (2560x1440) in 32" external monitor
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V
vmontero1109
11-03-2025, 05:34 AM #1

I’ve observed fluctuating frame times and spikes in several titles I’ve played. Attempting to cap the framerate with scopebuddy actually worsened the problem. Over the past couple of years, I haven’t played much on my PC, though I remember running Arch back in 2022/2023 without issues. After switching to Windows between 2023 and 2025, AMD’s drivers made me hesitant. I tried various settings using Scopebuddy’s interface, but it works with any game. I checked Doom Eternal’s performance metrics, and adjusting refresh rates or framerate limits increased CPU and GPU usage compared to leaving them unlocked or using VRR. Since VRR doesn’t enforce a cap, I’m not really relying on it. I know my hardware has plenty of capacity.

While troubleshooting, I disabled scopebuddy, opened Doom Eternal, and even turned v-sync off—it still caused issues on my ViewSonic XG3220 (4K60). ‘PROTON_LOG=1’ didn’t write to my folder, but Steam and Eternal launched through the console. My guess is that the GPU and CPU aren’t syncing properly. A Reddit thread mentioned RDNA2 struggles with bottlenecks; my 6700 XT runs on an older CPU via PCI-E 3, yet less demanding games still perform well.

Any advice or leads would be greatly appreciated. I’m open to checking but running low on options.

System details:
- Motherboard: ASRock H170 Pro4S ATX
- Power Supply: EVGA SuperNOVA 650 G3 650W (80+ Gold)
- OS: Linux 6.17.7-ba14.fc43.x86_64
- CPU: Intel i7-6700K @ 4.20 GHz
- GPU: AMD Radeon RX 6700 XT
- RAM: 7.37 GiB / 15.55 GiB (77%)
- Storage: 19.70 GiB / 931.51 GiB (2%)
- Display: 3840x2160 @ 60 Hz (2560x1440) in 32" external monitor

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Infernolux
Junior Member
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11-03-2025, 05:34 AM
#2
The discussion doesn't reference ReBAR support on your computer. It's possible your chipset isn't equipped for it, which might explain the problem. Modern GPUs such as the AMD series 6000 rely on ReBAR for faster memory access. When this feature isn't available, smaller data moves increase, causing noticeable slowdowns. Enabling Vsync raises CPU demand, making it more taxing under certain conditions—like not playing in full screen. Using windowed mode may require refreshing at different rates, triggering some system communication. The rendering engine also plays a role; DX12 tends to be more CPU-heavy than Vulcan. Changing the engine could alter performance. Consider limiting FPS in games that support it or try freeframe if your monitor does. Make sure your VRAM usage isn't excessive, as full utilization can lead to lag and stuttering.
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Infernolux
11-03-2025, 05:34 AM #2

The discussion doesn't reference ReBAR support on your computer. It's possible your chipset isn't equipped for it, which might explain the problem. Modern GPUs such as the AMD series 6000 rely on ReBAR for faster memory access. When this feature isn't available, smaller data moves increase, causing noticeable slowdowns. Enabling Vsync raises CPU demand, making it more taxing under certain conditions—like not playing in full screen. Using windowed mode may require refreshing at different rates, triggering some system communication. The rendering engine also plays a role; DX12 tends to be more CPU-heavy than Vulcan. Changing the engine could alter performance. Consider limiting FPS in games that support it or try freeframe if your monitor does. Make sure your VRAM usage isn't excessive, as full utilization can lead to lag and stuttering.

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