Calculadora de Requisitos de VRAM para Juegos PC

VRAM (Video Random Access Memory) is ultra-high-speed memory mounted on your GPU, operating at 300 to 1,000+ GB/s. When a game allocates more assets than your physical VRAM possesses, the graphics driver spills textures over the PCIe bus into system DDR4/DDR5 RAM (which operates at only 50 to 90 GB/s). This 5x to 10x bandwidth deficit stalls the GPU rendering pipeline, causing sudden 1% low FPS drops and severe stuttering.

8GB VRAM is sufficient for competitive esports titles (CS2, Valorant, Apex Legends, Rocket League) and 1080p gaming at Medium-to-High settings. However, in modern Unreal Engine 5 titles (Black Myth: Wukong, S.T.A.L.K.E.R. 2) or titles with Ray Tracing enabled at 1440p, 8GB GPUs experience severe memory paging bottlenecks. 12GB to 16GB is now the recommended sweet spot for 1440p and entry 4K.

Rendering resolution directly dictates the size of display swapchains and G-Buffers (depth, normal, velocity, ambient occlusion, roughness passes). Native 4K requires roughly four times the base framebuffer memory of 1080p (~2,250 MB vs ~450 MB) before a single texture asset or Ray Tracing BVH tree is loaded.

Hardware Ray Tracing requires the GPU to build and update Bounding Volume Hierarchy (BVH) spatial acceleration trees in VRAM to trace light photons. Full Path Tracing (as in Cyberpunk 2077 or Alan Wake 2) also requires storing historical denoising buffers and Shader Execution Reordering (SER) payloads, adding between 2.0GB and 5.5GB of dedicated VRAM on top of rasterization.

Yes. Upscalers render the 3D scene at a lower internal resolution (e.g., DLSS Quality renders at 1440p when outputting 4K). This reduces G-Buffer and framebuffer memory requirements by 20% to 35%. However, enabling Frame Generation (DLSS 3 or FSR 3) introduces an optical flow vector cache and swapchain buffers that add approximately 800MB to 1,350MB of VRAM overhead.

VRAM Allocation is the total memory space requested and reserved upfront by the game engine and DirectX/Vulkan runtime. Dedicated VRAM Usage is the active working set of textures and geometry actively rendered in the current frame. Monitoring utilities like MSI Afterburner often display total allocation, which is why games may show 15GB used on a 16GB card without actually bottlenecking.

Graphics cards with an x8 PCIe bus have only half the data transfer lanes of an x16 card (16 GB/s vs 32 GB/s on PCIe 4.0). When VRAM overflows and assets must be paged over the PCIe bus into system RAM, the narrower bus chokes the data transfer, resulting in frametime hitch spikes that last up to twice as long.

Custom 4K and 8K texture packs (popular in Skyrim, Cyberpunk 2077, and Fallout 4) bypass default texture streaming compression and mipmap downscaling, commonly adding 2,000MB to 4,500MB of extra VRAM. An uncompressed 4K overhaul mod will easily cause an 8GB or 10GB GPU to crash even at 1080p.

Yes. The Windows Desktop Window Manager (DWM), hardware-accelerated web browsers (Chrome, Edge), Discord, and streaming encoders like OBS Studio typically reserve between 600MB and 1,800MB of your GPU VRAM. Our calculator includes an OS & Background Reserve setting to accurately account for this real-world factor.

1. Lower Texture Quality from Ultra to High (typically frees 1,500MB to 2,500MB with negligible visual difference). 2. Disable Ray Tracing or switch from Path Tracing to standard RT (frees 1,800MB to 3,500MB). 3. Enable DLSS or FSR Quality Mode (frees 300MB to 600MB on render targets). 4. Disable Frame Generation if on an 8GB GPU.

For 1080p budget builds, aim for 12GB (e.g., RTX 3060 12GB, RX 6700 XT, or Intel Arc B580). For 1440p high-refresh gaming, 16GB is the consensus sweet spot (e.g., RX 7800 XT, RTX 4070 Ti Super, or RX 7900 GRE). For native 4K with Ray Tracing and future longevity, 16GB to 24GB is essential (e.g., RTX 4080 Super, RX 7900 XTX, or RTX 4090).

Our engine models exact framebuffer pixel counts, empirical geometry baselines from leading engines (Unreal Engine 5 Nanite/Lumen, REDengine, RE Engine), texture mipmap tier formulas, BVH ray tracing taxes, and frame generation telemetry cross-referenced with laboratory benchmarks from TechPowerUp, Digital Foundry, and Hardware Unboxed.