Radeon HD 4890 and Radeon HD 7770M - video card comparison

Radeon HD 4890

Radeon HD 7770M

Architecture

TeraScale (2005−2013)

GCN (2011−2017)

GPU code name

RV790

Chelsea XT

Market segment

Desktop

Laptop

Release date

April 2009

April 2012

Interface

PCIe 2.0 x16

Supplementary power connectors

2x 6-pin

Core clock speed

850 MHz

675 MHz

Floating-point performance

1,360.0 gflops

691.2 gflops

Manufacturing process technology

55 nm

28 nm

Number of transistors

959 million

1,500 million

Pipelines / CUDA cores

800

512

Power consumption (TDP)

190 Watt

32 Watt

Texture fill rate

34.00

21.60

Memory type

GDDR5

Maximum RAM amount

1 GB

Memory bus width

256 Bit

128 Bit

Memory clock speed

3900 MHz

4000 MHz

Memory bandwidth

124.8 GB/s

64 GB/s

Shared memory

Display Connectors

2x DVI, 1x S-Video

No outputs

DirectX

10.1 (10_1)

12 (11_1)

OpenCL

1.1

1.2

OpenGL

3.3

4.6

Shader Model

4.1

5.1

Vulkan

N/A

1.2.131