My dedicated streaming PC has started struggling during live broadcasts. I run OBS at 1080p to three platforms alongside Discord, WaveLink, several browser sources, Stream Deck, Apple Music, Chrome, and other background apps. I also want to record in OBS while streaming.
During a stream, OBS reports around 25% CPU usage, overall CPU usage reaches the 70% range, and GPU usage is often around 90%. Opening applications while live can make them load slowly and causes OBS to freeze. My headset audio sometimes cuts in and out, and browser sources frequently lag.
I originally assumed the Ryzen 5 5500 was overwhelmed because an AI recommendation suggested replacing it with a Ryzen 9 5900XT and buying a better cooler. However, I am not sure whether spending roughly $400–$500 on that upgrade makes sense or whether I should save for an entirely new streaming PC. I am a college student, so I would prefer the most cost-effective solution that still provides smooth streaming and recording.
I have also enabled the RAM profile recently and am working on updating the motherboard BIOS, although I do not yet have the tools needed. My current hardware is:
CPU: AMD Ryzen 5 5500
CPU cooler: AMD stock cooler
GPU: Radeon RX 6600
Motherboard: Gigabyte B550M DS3H AC, revision 1.5
BIOS: American Megatrends International, version F5a, dated 04/11/2024
Memory: 32GB Corsair DDR4
Storage: 500GB Kingston NVMe SSD and approximately 640GB Hitachi HDD
Power supply: Cooler Master MasterWatt 650W
Case: likely Cooler Master N400
Capture card: Elgato 4K Pro
Would a CPU and cooler upgrade be enough, or should I replace the whole system?
4 Answers
Make sure the memory profile is enabled in BIOS. XMP or, on many AMD boards, DOCP is not extra RAM or a way to use every stick; it simply applies the memory's advertised speed and timings instead of leaving it at a slower default. Also test with browser hardware acceleration and unnecessary OBS sources disabled. Updating BIOS and chipset drivers may help stability, but it is unlikely to magically solve every performance issue.
You probably do not need an entirely new PC. AM4 systems are still perfectly capable of streaming, and your 32GB of memory is enough for this workload. A Ryzen 7 5700X or 5800X would give you more cores for multitasking, though the 5800X should be paired with a decent aftermarket cooler. A 5700X3D or 5800X3D could also be worthwhile if you find one at a good price. After that, consider upgrading the GPU if it remains close to 90–100% usage.
If you upgrade cheaply, a Ryzen 7 5700X or 5800X plus a Thermalright Peerless Assassin or similar air cooler would be a sensible path. You already have DDR4 memory, a compatible B550 motherboard, and a suitable power supply, so replacing the entire computer would be unnecessary unless testing shows several components are failing. Make sure the BIOS supports the processor before installing it and follow the motherboard manufacturer's update instructions carefully.
The Ryzen 9 5900XT recommendation may be poor value for this build. Look at the total system usage first rather than assuming the CPU is the only problem. Your RX 6600 being near maximum usage could explain lag in browser sources and OBS, while the 5500 is not automatically too weak. Check OBS statistics, GPU encoder usage, VRAM, temperatures, and whether the game or source content is saturating the graphics card before buying parts.
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