Key Specifications:

The NVIDIA GeForce 405 is a very old, entry-level desktop GPU released in 2010, based on the GT218 (Tesla) architecture — the same as the GeForce 210 and 310. It was marketed as a budget or OEM-only card, often pre-installed in low-cost PCs and all-in-one systems.

• Architecture: Tesla (GT218)
• GPU Codename: GT218-300-A3
• Manufacturing Process: 40 nm
• CUDA Cores: 16
• Core Clock: ~589 MHz
• Memory: Typically 512 MB or 1 GB DDR3
• Memory Bus: 64-bit
• Memory Bandwidth: ~6.4 GB/s
• DirectX Support: DirectX 10.1 (not DX11 or later)
• OpenGL Support: Up to ~3.3
• Power Consumption: Very low (~19–25 W), often passive cooling (no fan)
• PCIe Interface: PCIe 2.0 x16
• No DisplayPort support — typically VGA + DVI (sometimes HDMI via DVI adapter)

Important Notes:

• ❌ Not compatible with modern drivers: NVIDIA dropped official driver support after GeForce Release 340 series (last updated ~2016). No security updates or new OS compatibility (e.g., Windows 11 lacks official drivers).
• ❌ No hardware-accelerated video decoding for modern codecs (no NVENC, no support for H.264 high profile beyond basic, no HEVC/VP9/AV1).
• ❌ Not suitable for gaming, even light titles (e.g., Minecraft Java Edition at low settings may stutter; CS:GO, League of Legends, or anything post-2012 is largely unplayable).
• ✅ Useful only for basic display output (multiple monitors, legacy systems), or as a placeholder GPU when the primary GPU fails.

Driver & OS Compatibility:

• Last supported driver: v340.52 (legacy branch, Windows 7/8.1 only).
• Windows 10/11: May work with generic Microsoft Basic Display Adapter or older drivers in compatibility mode — but expect limited functionality, no GPU acceleration, and possible instability.
• Linux: Supported via open-source nouveau driver (basic 2D), or legacy nvidia-340 blob (discontinued and unmaintained).

Bottom Line:

The GeForce 405 is obsolete by modern standards — more of a historical footnote than a usable GPU today. If you're encountering one:

• In an old PC: Consider upgrading to at least a GTX 750 Ti (or newer low-power card like GT 1030) for basic usability.
• As a spare part: Not worth keeping unless for retro-compatibility or extreme low-power headless use.

Let me know if you'd like help identifying a replacement, checking compatibility, or troubleshooting driver issues with this card! 🛠️