What is VRAM and why does it matter?
VRAM stores textures, shaders, and rendered frames. More VRAM = larger textures, higher resolution, more complex scenes. Running out of VRAM causes stuttering and lower frame rates. Resolution and detail both affect VRAM usage.
Gaming: How much VRAM is enough?
1080p High: 4-6GB. 1440p High: 6-8GB. 1440p Ultra: 8-12GB. 4K Ultra: 12-24GB. Note: performance (GPU power) matters more than VRAM. RTX 4060 with 8GB beats RTX 4060 Ti with 16GB if you can't maintain framerate.
Streaming + gaming (OBS)
Simultaneous gaming + encoding: adds 2-3GB VRAM overhead. RTX 4070 (12GB) + streaming = tight. RTX 4070 Ti (16GB) = comfortable. Rule: add 3GB for streaming overhead.
Video editing & 3D rendering
DaVinci Resolve 4K editing: 12GB minimum, 16GB recommended. 8K editing: 20GB+. 3D rendering (Blender): 6GB fine for CPU rendering, 12GB for CUDA acceleration. Creative work is VRAM-hungry.
VRAM type & speed
GDDR6X (RTX 4090, 4070 Ti): fastest, 648 GB/s bandwidth. GDDR6 (RTX 4070): good, 576 GB/s. GDDR5 (RTX 3060): slower, 360 GB/s. Speed matters less than capacity. A RTX 4060 with GDDR6 beats RTX 3080 with GDDR5X at same VRAM.
Future-proofing: Buy this much VRAM
Gaming 2026+: 12GB (RTX 4070 level). Streaming 2026+: 16GB. Creative work: 20GB. Don't buy 4GB or 8GB anymore — barely enough today.