AMD Radeon HD 7870M vs AMD Radeon HD 6490M Mac Edition

VS

AMD Radeon HD 7870M AMD Radeon HD 6490M Mac Edition

We compared two Mobile platform GPUs: 2GB VRAM Radeon HD 7870M and 256MB VRAM Radeon HD 6490M Mac Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 7870M 's Advantages

Released 11 months late

Larger VRAM bandwidth (64.00GB/s vs 25.41GB/s)

480 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 7870M +326%

1.024 TFLOPS

Radeon HD 6490M Mac Edition

0.24 TFLOPS

Radeon HD 7870M

VS

Radeon HD 6490M Mac Edition

Graphics Card

Apr 2012

Release Date

May 2011

London

Generation

Vancouver

Mobile

Type

Mobile

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

1000 MHz

Memory Clock

794 MHz

Memory

2GB

Memory Size

256MB

GDDR5

Memory Type

GDDR5

128bit

Memory Bus

64bit

64.00GB/s

Bandwidth

25.41GB/s

Render Config

-

SM Count

-

10

Compute Units

2

640

Shading Units

160

40

TMUs

8

16

ROPs

4

-

Tensor Cores

-

RT Cores

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

256 KB

L2 Cache

128 KB

Theoretical Performance

12.80 GPixel/s

Pixel Rate

3.000 GPixel/s

32.00 GTexel/s

Texture Rate

6.000 GTexel/s

-

FP16 (half)

-

1024 GFLOPS

FP32 (float)

240.0 GFLOPS

64.00 GFLOPS

FP64 (double)

-

Graphics Processor

Heathrow

GPU Name

Seymour

Heathrow XT (216-0835033)

GPU Variant

Seymour XTX M2 (216-0809000)

GCN 1.0

Architecture

TeraScale 2

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

1.5 billion

Transistors

0.37 billion

123 mm²

Die Size

67 mm²

Board Design

45W

TDP

Unknown

-

Suggested PSU

-

No outputs

Outputs

Portable Device Dependent

-

Power Connectors

-

Graphics Features

12 (11_1)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

1.2

OpenCL

1.2

Vulkan

N/A

-

CUDA

-

5.1

Shader Model

5.0

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