The HD 4890 was a high-end card in its day, but its architecture predates modern Windows Display Driver Model (WDDM) versions required for full Windows 10 graphics acceleration.
The ATI Radeon HD 4890 is 14 years old. In the world of technology, that is prehistoric. The fact that you can still run Windows 10 64-bit, install a “new” driver (even a modded one), and play Left 4 Dead 2 or Portal at max settings is remarkable. ati radeon hd 4890 drivers windows 10 64bit new
The HD 4890 is a power-hungry card for its age. It requires two 6-pin PCI-E power connectors. The HD 4890 was a high-end card in
ATI Radeon™ HD 4890 Drivers and Downloads | Latest Version ati radeon hd 4890 drivers windows 10 64bit new