AMD Radeon HD 7870M vs NVIDIA GeForce GTX 285 Mac Edition

Table of Contents

Graphics Processor

GPU model Heathrow GT200B
GPU variant Heathrow XT (216-0835033) G200-350-B3
Architecture GCN 1.0 Tesla 2.0
Foundry TSMC TSMC
Manufacturing process 28 nm 55 nm
Number of transistors 1,500 million 1,400 million
Die size 123 mm² 470 mm²

Mobile graphics

Release date Apr 24th, 2012
Generation London (HD 7800M)
Production End-of-life
Interface PCIe 3.0 x16
Predecessor Vancouver
Successor Solar System

Clocks

GPU clock 800 MHz 648 MHz
Memory clock 1000 MHz 4 Gbps effective 1242 MHz 2.5 Gbps effective
Shader clock 1476 MHz

Memory Configuration

Memory size 2 GB 1024 MB
Memory type GDDR5 GDDR3
Memory bus width 128 bit 512 bit
Bandwidth 64.00 GB/s 159.0 GB/s

Render Configuration

Shading units 640 240
TMUs 40 80
ROPs 16 32
Compute units 10
Cache L1 16 KB (per CU)
Cache L2 256 KB 256 KB
SM count 30

Performance

Pixel rate 12.80 GPixel/s 20.74 GPixel/s
Texture rate 32.00 GTexel/s 51.84 GTexel/s
FP32 (float) performance 1,024 GFLOPS 708.5 GFLOPS
FP64 (double) performance 64.00 GFLOPS (1:16) 88.56 GFLOPS (1:8)

Dimensions & Outputs

TDP 45 W 204 W
Outputs No outputs 2x DVI1x S-Video
Slot width Dual-slot
Length 267 mm 10.5 inches
Suggested PSU 550 W
Power connectors 2x 6-pin

API Support & Features

DirectX 12 (11_1) 11.1 (10_0)
OpenGL 4.6 3.3
OpenCL 1.2 1.1
Vulkan 1.2
Shader model 5.1 4.0
CUDA 1.3

Other Features

Graphics Card

Release date Jan 15th, 2009
Generation GeForce 200
Production End-of-life
Interface PCIe 2.0 x16
Reviews 88 in our database
Predecessor GeForce 9
Successor GeForce 400

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