: Low FPS on League of Legends and Low GPU Usage?
: Low FPS on League of Legends and Low GPU Usage?
Hello everyone!
I’ve reached a point where I can’t solve my issue alone, so I’m reaching out for assistance.
Last week I purchased a Sapphire RX 5700 XT Nitro+ and cleaned up my old drivers using ddu. Everything seemed to work fine at first.
Until I started playing League of Legends. The performance dropped drastically—60 to 90 frames per second, then down to just 30 FPS.
It was clear the card could handle the game better than it did before, but a friend who owns the same card confirmed he consistently achieves over 140 FPS.
I searched thoroughly for any problems but found nothing.
I tried reinstalling drivers, updating GPU BIOS, checking compatibility, reinstalling the game, and even testing with benchmark tools and other applications.
Still, the issue remains unresolved.
The game is running smoothly overall, but certain metrics are unusually low—GPU usage around 20%, CPU at about 40%. Temperatures are also normal, hovering near 80°C on the GPU and 50°C on the CPU.
My system details:
- MSI B350 Tomahawk plus
- Ryzen 5 2400G
- Sapphire RX 5700 XT Nitro+
- 16GB RAM @ 3200MT/s
- 500W PSU from Thermaltake
- Kingston NVME boot drive
- Windows 10 PRO, Linux Manjaro
I’m aware the CPU only has an x8 PCIe slot for the GPU, but I think that’s more than enough bandwidth.
The 500W power supply seems sufficient, though I doubt it’s the main bottleneck since usage is low.
Any suggestions would be greatly appreciated.
Thanks in advance!
Well, you're operating with a 500w PSU and AMD suggests a "Recommended 650 Watt Power Supply (Minimum 600 Watt Power Supply)" for that model. This could definitely pose an issue. Are you using GPU-Z in the background? You should be. Pause the game, open it, and navigate to the Sensors tab, then scroll down to PerfCap Reason (Performance cap Reason). Check the codes displayed. When you hover over "PerfCap," it provides details for each code.
It’s likely you’ll see values like Pwr, VRel, and/or VOp, all pointing to insufficient or unstable power. I suspect League of Legends is demanding more from your card than others, causing it to throttle due to inadequate power supply.
Even if this isn’t the root cause, upgrading to a 750w PSU right away is strongly advised. You’re exceeding your current PSU’s capacity—when they fail, they can damage other components like the motherboard or GPU.
The EVGA SuperNOVA 750 G5 is a solid option. I recommend going full modular; just connect the necessary cables, it looks tidier, and swapping parts becomes much simpler without rewiring everything.
It's not related to the GPU, but it's a CPU problem. I'm joking about fast CPUs and how a 4-core 3.9GHz one might struggle to maintain frames. What CPU does your friend have?
Unfortunately, AMD doesn't offer PerfCap, but I understand the PSU isn't powerful enough for this GPU. I'm considering an upgrade, but the real concern is that under stress with both CPU and GPU running at the same time, the GPU performs as expected. This suggests the PSU might be struggling to provide power despite the game being relatively easy. My friend's experience with a Ryzen 5 3400g and a Ryzen 7 5800x supports this idea—the 5800 feels much better than the 2400g, which could indicate a similar issue here.
You misunderstood my response. Perfcap is a feature in the GPU-Z app. It's unrelated to AMD specifically.
Feel free to disregard the rest of your message until your overworked GPU might fail and possibly damage your system. That could happen or not—you're definitely a strong candidate based on your specs.
Good luck either way.
GPU-Z simply reads the data the GPU sends. Nvidia offers the feature you mention, PrfCap, which allows GPU-Z to interpret it, while AMD does not provide this functionality, as noted in the linked article. PerfCap doesn’t display a reason under the sensors tab.
Hello everyone! I just installed GPU-Z to address an unusual issue with my system that seems connected to my GPU (RX 480). I wanted to check if my GPU was being throttled during the problem. When I opened the sensors tab, I received fewer readings than expected...
www.techpowerup.com
I think you’re referring to my PSU when you mention it being overworked. As I said, I plan to upgrade soon because that’s the only solution that makes sense for my PC.
Hello, thank you for your message. I understand how my previous response might have seemed a bit critical. I really believe your PSU is contributing to your card's performance issues. It would be great if you could consider upgrading it soon.
Best regards!
I don't believe PSU is the main issue. Over the past two weeks I've experienced the same problem with League of Legends, even though I'm playing on a laptop equipped with:
GPU: 1660 Ti maxQ
CPU: Ryzen 7 4800HS
RAM: 16 GB
This issue started without clear cause and is quite unusual. The most surprising part is that power-hungry games still run smoothly, but LOL it's not playable for me. I usually get around 10 fps with just 1% frame time, yet in Elden Ring I see stable 50-60 fps on medium settings.