ATI Radeon HD 4870 Mac Edition vs NVIDIA GeForce GTX 275 PhysX Edition

Table of Contents

Graphics Processor

GPU model RV770 G92B
GPU variant RV770 XT Mac (215-0669080) G92-421-B1
Architecture TeraScale Tesla
Foundry TSMC TSMC
Manufacturing process 55 nm 55 nm
Number of transistors 956 million 754 million
Die size 256 mm² 260 mm²

Graphics Card

Release date Jan 6th, 2009 Feb 16th, 2010
Generation Radeon R700 GeForce 200
Production End-of-life End-of-life
Interface PCIe 2.0 x16 PCIe 2.0 x16
Reviews 135 in our database 61 in our database
Predecessor Radeon R600 GeForce 9
Successor Evergreen GeForce 400

Clocks

GPU clock 750 MHz 633 MHz
Memory clock 850 MHz 3.4 Gbps effective 1134 MHz 2.3 Gbps effective
Shader clock 1296 MHz

Memory Configuration

Memory size 512 MB 896 MB
Memory type GDDR5 GDDR3
Memory bus width 256 bit 448 bit
Bandwidth 108.8 GB/s 127.0 GB/s

Render Configuration

Shading units 800 240
TMUs 40 80
ROPs 16 28
Compute units 10
Cache L1 16 KB (per CU)
Cache L2 256 KB 224 KB
SM count 30

Performance

Pixel rate 12.00 GPixel/s 17.72 GPixel/s
Texture rate 30.00 GTexel/s 50.64 GTexel/s
FP32 (float) performance 1,200 GFLOPS 622.1 GFLOPS
FP64 (double) performance 240.0 GFLOPS (1:5) 77.76 GFLOPS (1:8)

Dimensions & Outputs

Slot width Dual-slot Dual-slot
Length 250 mm 9.8 inches 267 mm 10.5 inches
TDP 150 W 219 W
Suggested PSU 450 W 550 W
Outputs 1x DVI1x mini-DisplayPort 2x DVI
Power connectors 2x 6-pin 1x 6-pin + 1x 8-pin
Board number B771

API Support & Features

DirectX 10.1 (10_1) 11.1 (10_0)
OpenGL 3.3 3.3
OpenCL 1.1 1.1
Vulkan
Shader model 4.1 4.0
CUDA 1.3

Other Features

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