ATI Mobility Radeon HD 4830 vs ATI Mobility Radeon HD 4850 Mac Edition

Graphics Processor

GPU model M97 M98
Architecture TeraScale TeraScale
Foundry TSMC TSMC
Manufacturing process 40 nm 55 nm
Number of transistors 826 million 956 million
Die size 137 mm² 256 mm²

Mobile graphics

Release date Mar 3rd, 2009 Aug 28th, 2009
Generation M9x (Mobility HD 4800) M9x (Mobility HD 4800)
Production End-of-life End-of-life
Interface PCIe 2.0 x16 PCIe 2.0 x16
Reviews 2 in our database 2 in our database
Predecessor M8x M8x
Successor Manhattan Manhattan

Clocks

GPU clock 550 MHz 503 MHz
Memory clock 700 MHz 2.8 Gbps effective 850 MHz 1700 Mbps effective

Memory Configuration

Memory size 1024 MB 512 MB
Memory type GDDR5 GDDR3
Memory bus width 128 bit 256 bit
Bandwidth 44.80 GB/s 54.40 GB/s

Render Configuration

Shading units 640 800
TMUs 32 40
ROPs 16 16
Compute units 8 10
Cache L1 16 KB (per CU) 16 KB (per CU)
Cache L2 128 KB 256 KB

Performance

Pixel rate 8.800 GPixel/s 8.048 GPixel/s
Texture rate 17.60 GTexel/s 20.12 GTexel/s
FP32 (float) performance 704.0 GFLOPS 804.8 GFLOPS
FP64 (double) performance 140.8 GFLOPS (1:5) 161.0 GFLOPS (1:5)

Dimensions & Outputs

TDP unknown unknown
Outputs No outputs No outputs

API Support & Features

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

Other Features

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