Stable power supply for graphics card mining: provides reliable power delivery to MXM GPUs via a PCIe 1X connection, supporting steady operation in mining setups. LED power indicator: builtin LED lets you confirm the device is powered on at a glance, helping verify status quickly. Power performance verified with R9 M390X: actual measurements show support for up to 75W power consumption when tested with an AMD Radeon R9 M390X. PCIe 1X to MXM 3.0 adapter card with USB 3.0 interface: enables MXM 3.0 GPUs to connect through a PCIe 1X host slot, while providing a USB 3.0 interface for speed data connectivity. Recommended usage: for results, use with a graphics card extension cable to simplify installation and improve reliability. Use scenarios: 1) Crypto mining rigs that deploy MXMbased GPUs requiring PCIe 1X connectivity, enabling a practical power and data path. 2) GPU power and performance testing bench, using the R9 M390X reference to verify up to 75W draw and stable operation. 3) Compact lab or smallformfactor setups where a PCIe 1X host needs to interface with MXM 3.0 GPUs, with USB 3.0 providing convenient data access.