The PNY Quadro A400 sits at the entry point of NVIDIA's Ampere-generation professional GPU line, built on the same 4nm-class GA107 chip family as the A1000 but cut down to a smaller configuration for basic CAD and multi-display business use. It ships in a standard-plus-low-profile dual-bracket single-slot design, carrying 4GB of GDDR6 memory on a 64-bit bus (96GB/s bandwidth), 768 CUDA cores, 24 Tensor cores, and 6 dedicated RT cores, with a 2.25MB L1 / 2MB L2 cache. It connects via PCI-Express 4.0 x16 and needs no separate power connector at all, drawing power entirely from the slot. Rated throughput is around 2,706 GFLOPS with a 28 GPixels/sec fill rate and 42 GTexels/sec via 72 TMUs. Display output is 4x mini-DisplayPort/DisplayPort. It supports OpenGL 4.6, DirectX 12, Shader Model 6.5, and Vulkan 1.2, backed by a 3-year warranty. This is the card for entry-level CAD/drafting seats and multi-monitor business workstations where certified professional drivers matter more than raw 3D performance, at the lowest cost and power draw in the Ampere Quadro range.