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Lantic Radeon HD 4855 (part number A4855D5-1GDVH TOP) is a Graphics Processing Unit for desktop market segment, based on ATI Radeon HD 4855. The GPU, fabricated on 55 nm manufacturing process, utilizes Unified Superscalar Shader architecture. The card has 625 MHz graphics clock frequency. Furthermore, it has 640 stream processors, 32 texture units, along with 16 color ROPs. The Radeon HD 4855 comes with 512 MB of GDDR5 memory. Because the memory runs at 900 MHz, and uses 256 bit bus, the effective memory bandwidth is 115.2 GB/s. The GPU supports PCI Express 2.0 interface, and needs 2 motherboard slots. The maximum power draw of this model is 110 Watt, same as on the reference design.
Below you will find more detailed specs of the Lantic Radeon HD 4855 graphics card.