Radeon HD 4855

Graphics processor

Video memory: 512 MB^*
Memory bus: 256 bit^*
Rated memory bandwidth: 115.20 GB/s^*

No matched benchmark results are available for this entry yet.

Processing & platform

Architecture: TeraScale^*
Process node: 55 nm^*
GPU base clock: 575 MHz^*

Memory & storage

Video memory: 512 MB^*
Video memory type: Reported value 1: GDDR5^*
Reported value 2: GDDR6^*
Reported value 3: GDDR5^*
Memory bus: 256 bit^*
Rated memory bandwidth: 115.20 GB/s^*

System configuration

Detailed specifications

Specifications 1 · 52 fields

Brand: ATI^*
Top BUS WIDTH: 256^* bit
Graphics Processor GPU Name: RV770^*
Graphics Processor Architecture: TeraScale^*
Graphics Processor Process Size: 55^* nm
Graphics Processor Transistors: 956 million^*
Graphics Processor Die Size: 256^* mm²
Graphics Card Release Date: Jan 3rd, 2010^*
Graphics Card Generation: Radeon R700 (HD 4800)^*
Graphics Card Successor: Evergreen^*
Graphics Card Production: End-of-life^*
Name: Radeon HD 4855^*
Graphics Card Bus Interface: PCIe 2.0 x16^*
Clock Speeds GPU Clock: 575^* MHz
Clock Speeds Memory Clock: 900 MHz 3.6 Gbps effective^*
Memory Memory Size: 512^* MB
Memory Memory Type: GDDR5^*
Memory Memory Bus: 256^* bit
Memory Bandwidth: 115.2^* GB/s
Render Config TMUs: 32^*
Top GRAPHICS PROCESSOR: RV770^*
Render Config ROPs: 16^*
Theoretical Performance Pixel Rate: 9.200 GPixel/s
Theoretical Performance Texture Rate: 18.40 GTexel/s
Board Design Slot Width: Dual-slot^*
Board Design TDP: 110^* W
Board Design Suggested PSU: 300^* W
Board Design Outputs: 1x DVI 1x HDMI 1.3a 1x VGA^*
Graphics Features DirectX: 10.1 (10_1)^*
Graphics Features OpenGL: 3.3^*
Graphics Features OpenCL: 1.1^*
source file: ati2010.json^*
Graphics Processor Foundry: TSMC^*
Graphics Card Predecessor: Radeon R600^*
Recommended Resolutions: Good:640x480 | Playable:1280x720 | Low FPS:1366x768^*
Board Design Length: 220 mm 8.7 inches^*
Graphics Processor GPU Variant: RV770 PRO (215-0669065)^*
Board Design Power Connectors: 1x 6-pin^*
Graphics Processor Density: 3.7M / mm²^*
Top TMUS: 32^*
Graphics Processor Chip Package: HFCBGA-1492^*
Top ROPS: 16^*
Graphics Features Shader Model: 4.1^*
Top CORES: 640^*
Render Config Shading Units: 640^*
Render Config Compute Units: 8^*
Render Config L2 Cache: 256^* KB
Top MEMORY SIZE: 512^* MB
Theoretical Performance FP32 (float): 736^* GFLOPS
Theoretical Performance FP64 (double): 147.2 GFLOPS (1:5)
Render Config L1 Cache: 16 KB (per CU)^*
Top MEMORY TYPE: GDDR5^*

Specifications 2 · 27 fields

manufacturer: ATI^*
manufacturer: ATI^*
rop: 32^*
rop: 16^*
igp: No^*
igp: No^*
bus: PCIe 3.0 x16^*
bus: PCIe 2.0 x16^*
memType: GDDR5^*
memType: GDDR6^*
gpuChip: TU117^*
gpuChip: RV770^*
productName: Radeon HD 4855^*
productName: Radeon HD 4855^*
releaseYear: 2,010^*
releaseYear: 2,010^*
memSize: 0.512^*
memSize: 0.512^*
memBusWidth: 256^*
gpuClock: 575^*
gpuClock: 855^*
memClock: 900^*
memClock: 1,250^*
unifiedShader: 1,024^*
unifiedShader: 640^*
tmu: 32^*
tmu: 64^*

* Provisional data