Modern GPU marketing is full of acronyms. Ray tracing, DLSS, FSR, XeSS — each promises better visuals or performance. Here's what they actually do and whether they matter for your setup.
Ray Tracing: Real Lighting at a Cost
Ray tracing simulates light physically — reflections, shadows, and ambient occlusion are calculated by tracing individual light rays through the scene. The result is genuinely more realistic lighting, particularly in reflective surfaces and indirect illumination. The cost is significant: enabling ray tracing in Cyberpunk 2077 can drop frame rates by 40–60% depending on quality level. NVIDIA RT cores (RTX series) and AMD's ray accelerators handle this in hardware; software ray tracing is too slow for real-time use.
For competitive gaming (CS2, Valorant, Warzone), disable ray tracing — it gives no gameplay advantage and costs frame rate. For cinematic single-player games (Cyberpunk, Spider-Man), it's worth it with a powerful GPU (RTX 4070+).
DLSS: AI Upscaling from NVIDIA
Deep Learning Super Sampling renders the game at a lower internal resolution (e.g., 1080p) and uses a trained neural network to upscale the output to your display resolution (e.g., 1440p or 4K). DLSS Quality mode is indistinguishable from native resolution to most players while recovering 30–50% frame rate. It requires an RTX GPU (Tensor cores). DLSS 3 and DLSS 4 add Frame Generation — fabricating intermediate frames — which further boosts apparent frame rates.
FSR: AMD's Open Alternative
FidelityFX Super Resolution is AMD's upscaling technology, but unlike DLSS, it runs on any GPU (NVIDIA, AMD, Intel). FSR 3 with Frame Generation requires newer AMD GPUs. FSR Quality mode is competitive with DLSS on supported titles. If you have an AMD GPU or an older NVIDIA card, FSR is your upscaling option.
The Practical Recommendation
RTX 4060 or better: enable DLSS, consider ray tracing at Quality preset. RX 7600 or older NVIDIA: use FSR Quality. Any GPU: if frame rate is your priority, disable both and run native resolution at lower quality settings.