ATI Radeon HD 4870 Mac Edition vs Intel Iris Plus Graphics 640

Table of Contents

Graphics Processor

GPU model RV770 Kaby Lake GT3e
GPU variant RV770 XT Mac (215-0669080)
Architecture TeraScale Generation 9.5
Foundry TSMC Intel
Manufacturing process 55 nm 14 nm++
Number of transistors 956 million unknown
Die size 256 mm² unknown

Graphics Card

Release date Jan 6th, 2009
Generation Radeon R700
Production End-of-life
Interface PCIe 2.0 x16
Reviews 135 in our database
Predecessor Radeon R600
Successor Evergreen

Clocks

GPU clock 750 MHz
Memory clock 850 MHz 3.4 Gbps effective System Shared
Base clock 300 MHz
Boost clock 1100 MHz

Memory Configuration

Memory size 512 MB System Shared
Memory type GDDR5 System Shared
Memory bus width 256 bit System Shared
Bandwidth 108.8 GB/s System Dependent

Render Configuration

Shading units 800 384
TMUs 40 48
ROPs 16 6
Compute units 10
Cache L1 16 KB (per CU)
Cache L2 256 KB
Execution units 48

Performance

Pixel rate 12.00 GPixel/s 6.600 GPixel/s
Texture rate 30.00 GTexel/s 52.80 GTexel/s
FP32 (float) performance 1,200 GFLOPS 844.8 GFLOPS
FP64 (double) performance 240.0 GFLOPS (1:5) 211.2 GFLOPS (1:4)
FP16 (half) performance 1.690 TFLOPS (2:1)

Dimensions & Outputs

Slot width Dual-slot IGP
Length 250 mm 9.8 inches
TDP 150 W 15 W
Suggested PSU 450 W
Outputs 1x DVI1x mini-DisplayPort No outputs
Power connectors 2x 6-pin
Board number B771

API Support & Features

DirectX 10.1 (10_1) 12 (12_1)
OpenGL 3.3 4.6
OpenCL 1.1 3.0
Vulkan 1.2
Shader model 4.1 6.4

Other Features

Integrated Graphics

Release date Jan 3rd, 2017
Generation HD Graphics-M (Kaby Lake)
Production Active
Interface Ring Bus
Reviews 1 in our database

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