If you are using software encoding (x264), your CPU is doing all the heavy lifting. If you switched to hardware encoding (NVENC or AMD VCE), your GPU handles it instead. Most people never check this setting. Most streaming problems trace back to it.
I have spent years testing streaming setups on budget rigs and high-end machines. This guide is what I wish someone handed me when I first started.
What Actually Happens When You Go Live
The moment you click “Start Streaming,” your PC starts doing several things at once. Your CPU runs game logic, handles audio from your microphone and Discord, manages OBS scene switching, and keeps Windows running in the background. That is already a lot. If you add x264 software encoding on top of all that, a 6-core processor can hit 95% usage in seconds. At that point your stream starts dropping frames and your game starts stuttering.
Your GPU renders every single frame of your game. Lighting, shadows, textures, draw calls, all of it lands on the GPU. A demanding game on a mid-range card can push GPU load to 98% before you have even gone live.
Here is the part most guides skip entirely: modern GPUs have a completely separate chip built onto them just for video encoding. NVIDIA calls it NVENC. AMD calls it VCE. This chip sits completely idle while you play. When you route streaming through it, your gaming performance barely moves. Independent benchmarks consistently show NVENC adds less than 2% to overall GPU load. That single fact changes everything about how you should set up your stream.
CPU Encoding vs GPU Encoding: The Real Difference
CPU encoding (x264)
It produces slightly sharper video at the same bitrate. You can measure the difference in pixel-level comparisons. In real-world streams on Twitch with a 6000kbps cap, most viewers cannot see it. But your CPU pays a significant price to produce that image, especially while also running a game.
GPU encoding (NVENC or VCE)
It uses the dedicated encoder chip. Your gaming performance stays stable. The image quality is very close to x264, especially on RTX 30 and 40 series cards which use NVIDIA’s 7th generation NVENC. For Twitch and YouTube Gaming, this is the right choice for most people.
The tradeoff only starts to matter if you run a dual-PC setup, where one machine does nothing except encode. In that case, x264 at slow or medium preset gives you genuinely better quality because it is not competing with a running game.
Signs Your PC Is Struggling to Keep Up
Your PC tells you when it is overwhelmed. You just need to know what to look for.
Dropped frames in OBS. Look at the bottom right corner of OBS while you stream. If the dropped frame counter climbs during heavy action, your encoder cannot keep up. With x264, that is a CPU problem. With NVENC, it usually means your GPU was already maxed out from gaming before encoding started.
Your game stutters exactly when you go live. You were sitting at 120fps. The moment you clicked Start Streaming, it dropped to 70fps. That is x264 stealing CPU threads from your game engine. Switching to NVENC fixes this almost immediately.
The stream freezes but your game feels fine. Viewers report the stream is frozen while you feel no difference in the game. The encoder fell so far behind that it dropped entire seconds of video. Classic encoding overload.
Audio falls out of sync over time. Your voice gradually drifts away from your gameplay video. When the CPU is overloaded, it struggles to keep audio and video timestamps aligned. This is more common than people realise and almost always points to CPU bottleneck.
Fans spinning loud enough for your microphone to pick them up. Streaming pushes components harder than gaming alone because both run at high sustained loads for longer periods. If your CPU is hitting 90 to 95 degrees Celsius, it will throttle itself to cool down, and those throttle dips show up directly as dropped frames on stream.
Which Encoder Should You Use?
Single PC, gaming and streaming at the same time: Use NVENC (NVIDIA) or AMD VCE (AMD). Always. No debate. This preserves CPU headroom for your game and keeps the stream stable.
Just talking to the camera, no game running: Use x264 at medium or slow preset. Your CPU has nothing else to compete with, so it can produce better quality video with that extra headroom.
Twitch: Use NVENC H.264 with CBR at 6000kbps. Set your keyframe interval to 2 seconds. Never leave it on auto.
YouTube Gaming: NVENC HEVC (H.265) works well here. YouTube has no bitrate cap like Twitch does, so HEVC at higher bitrates gives noticeably cleaner video. Just note that viewers need a device that supports HEVC playback.
Laptop streaming: This is where almost every guide fails you. Laptops share a thermal budget between the CPU and GPU. When both run hot at the same time, the system throttles both of them to protect itself. Always use hardware encoding on a laptop. Cap your in-game frame rate to reduce GPU heat. Uncapped frames on a laptop during a two-hour stream is the fastest way to hit thermal throttling and crash your broadcast.
Dual PC setup: The gaming PC sends raw video through a capture card to the streaming PC. The streaming PC can then run x264 at slow or medium preset with no gaming load competing for resources. This setup produces the best possible stream quality, though most people do not need it.
Practical Settings That Actually Matter
Switch to NVENC first. Open OBS. Go to Settings, then Output, then find the Encoder dropdown. If it says x264, change it to NVENC H.264 or AMD HW H.264. Do this before anything else.
Lower your output resolution before touching bitrate. Many beginners try reducing their bitrate to fix dropped frames. The better fix is reducing encoding complexity. Streaming at 1280×720 with 6000kbps is easier on your encoder than 1920×1080 at the same bitrate. The quality difference at 6000kbps is smaller than you think.
Use CBR, not VBR on Twitch. Variable Bitrate is fine for YouTube uploads but Twitch ingest servers handle Constant Bitrate more reliably. Set it to CBR and do not change it.
Set the keyframe interval to 2. If you leave this on auto, some streaming servers will produce visual artifacts during fast-moving scenes. Manually set it to 2 seconds.
Close Chrome before going live. Chrome uses between 0.5GB and 3GB of RAM and actively consumes CPU cycles in the background. Close it, or at minimum close all tabs. Discord with hardware acceleration enabled also pulls GPU resources.
Use Ethernet. Streaming requires a stable, consistent upload connection, not just a fast one. Wi-Fi introduces packet loss even on a good router. A wired connection eliminates most network-related dropped frames entirely.
Raise OBS process priority. Right-click OBS in Task Manager and set priority to Above Normal. This tells Windows to give OBS CPU time before background processes compete for it.
Upgrade to 16GB RAM if you are on 8GB. In 2026 this matters. Windows 11 alone uses 3 to 4GB at idle. OBS uses 300 to 800MB. Add your game on top and 8GB fills up fast. When RAM fills up, Windows starts swapping to disk. That causes stuttering that shows up directly on your stream as frozen frames.
Recommended Setups for 2026
Budget build under $600: Ryzen 5 5600 paired with an RTX 3060. Stream at 1080p60 on Twitch using NVENC H.264 at 6000kbps. Works well for Valorant, CS2, Minecraft, and similar games.
Mid-range $900 to $1300: Ryzen 7 7700X or Intel Core i5-13600K with an RTX 4070. This is the sweet spot for most Twitch partners. The 7th generation NVENC in RTX 40 series cards produces noticeably cleaner streams than older generations.
High-end $2000 and above: Core i9 or Ryzen 9 paired with an RTX 4080 or 4090. At this level you can comfortably use x264 at medium preset while gaming at 1440p. You can also explore streaming at 1440p60 on YouTube Gaming, which has no bitrate restrictions.
Should You Upgrade Your CPU or GPU?
Upgrade your CPU if: Your processor has fewer than 6 cores. You stream without gaming (podcasts, tutorials, just-chatting content). You run a dedicated streaming PC in a dual-PC setup.
Upgrade your GPU if: Your GPU is already at 99% just from gaming, before streaming even starts. You are on a graphics card older than the GTX 10 series and cannot access NVENC. You want NVENC HEVC quality and need the 7th generation encoder from RTX 30 or 40 series.
Optimise before you upgrade: In most cases, the right OBS settings will fix your streaming problems faster than new hardware will. A Ryzen 5 5600 with NVENC set up properly will produce a better stream than a Core i9 running x264 on the same machine.
The Bottom Line
Streaming is CPU intensive when you use x264 software encoding. It is GPU intensive when you use NVENC or AMD VCE hardware encoding.
For anyone gaming and streaming on a single PC, hardware encoding is the right choice. It gives your CPU the breathing room it needs to run the game, keeps your stream stable, and produces image quality that is close enough to software encoding that most viewers will never notice the gap.
Fix your settings before you spend money on hardware. Most streaming problems are a one-setting fix inside OBS.
Frequently Asked Questions
Does Streaming Use More CPU or GPU?
Streaming uses more CPU when using x264 software encoding, while NVENC or AMD hardware encoding shifts most of the workload to the GPU’s dedicated encoder.
Is OBS CPU or GPU Intensive?
OBS depends on the encoder you choose. x264 heavily uses the CPU, while NVENC mainly uses the GPU encoder with minimal impact on gaming performance.
Why Does FPS Drop When Streaming?
FPS drops usually happen because the CPU is overloaded handling both the game and stream encoding at the same time. Hardware encoding can reduce this issue.
Is a 6-Core CPU Enough for Streaming?
Yes, a modern 6-core CPU is enough for gaming and streaming with NVENC enabled, though 8 cores provide better multitasking performance.
Can You Stream on a Laptop Without Issues?
Yes, laptops can stream smoothly when hardware encoding is enabled and temperatures are controlled to avoid thermal throttling.
Which Way Do GPU Fans Blow?
GPU fans usually pull cool air into the graphics card and push hot air out through the heatsink and case airflow system. In most PCs, proper airflow helps keep GPU temperatures low and improves gaming performance.
