ATI Radeon HD 4855 Graphics Card

Last updated:

Learn more about ATI Radeon HD 4855:

Specifications

Generation
Radeon R700
GPU model
RV770
Interface
PCIe 2.0 x16
GPU clock
575 MHz
Memory size
512 MB
DirectX
10.1 (10_1)
Release date
Jan 3rd, 2010

Graphics Processor

GPU model
RV770
GPU variant
RV770 PRO (215-0669065)
Architecture
TeraScale
Foundry
TSMC
Manufacturing process
55 nm
Number of transistors
956 million
Die size
256 mm²

Graphics Card

Release date
Jan 3rd, 2010
Generation
Radeon R700
Production
End-of-life
Interface
PCIe 2.0 x16
Predecessor
Radeon R600
Successor
Evergreen

Clocks

GPU clock
575 MHz
Memory clock
900 MHz 3.6 Gbps effective

Memory Configuration

Memory size
512 MB
Memory type
GDDR5
Memory bus width
256 bit
Bandwidth
115.2 GB/s

Render Configuration

Shading units
640
TMUs
32
ROPs
16
Compute units
8
Cache L1
16 KB (per CU)
Cache L2
256 KB

Performance

Pixel rate
9.200 GPixel/s
Texture rate
18.40 GTexel/s
FP32 (float) performance
736.0 GFLOPS
FP64 (double) performance
147.2 GFLOPS (1:5)

Dimensions & Outputs

Slot width
Dual-slot
Length
220 mm 8.7 inches
TDP
110 W
Suggested PSU
300 W
Outputs
1x DVI1x HDMI1x VGA
Power connectors
1x 6-pin

API Support & Features

DirectX
10.1 (10_1)
OpenGL
3.3
OpenCL
1.1
Shader model
4.1

Drivers

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