AMD Radeon HD 6770M vs ATI Mobility Radeon HD 4870

VS

AMD Radeon HD 6770M ATI Mobility Radeon HD 4870

We compared two Mobile platform GPUs: 1024MB VRAM Radeon HD 6770M and 512MB VRAM Mobility Radeon HD 4870 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6770M 's Advantages

Released 2 years late

More VRAM (1024GB vs 512GB)

Larger VRAM bandwidth (57.60GB/s vs 56.83GB/s)

ATI Mobility Radeon HD 4870 's Advantages

320 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 6770M

0.696 TFLOPS

Mobility Radeon HD 4870 +26%

0.88 TFLOPS

Radeon HD 6770M

VS

Mobility Radeon HD 4870

Graphics Card

Jan 2011

Release Date

Jan 2009

Vancouver

Generation

M9x

Mobile

Type

Mobile

MXM-A (3.0)

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

900 MHz

Memory Clock

888 MHz

Memory

1024MB

Memory Size

512MB

GDDR5

Memory Type

GDDR3

128bit

Memory Bus

256bit

57.60GB/s

Bandwidth

56.83GB/s

Render Config

-

SM Count

-

6

Compute Units

10

480

Shading Units

800

24

TMUs

40

8

ROPs

16

-

Tensor Cores

-

RT Cores

-

8 KB (per CU)

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

256 KB

Theoretical Performance

5.800 GPixel/s

Pixel Rate

8.800 GPixel/s

17.40 GTexel/s

Texture Rate

22.00 GTexel/s

-

FP16 (half)

-

696.0 GFLOPS

FP32 (float)

880.0 GFLOPS

-

FP64 (double)

176.0 GFLOPS

Graphics Processor

Whistler

GPU Name

M98

Whistler XT (216-0810001)

GPU Variant

M98 XT L2 (216-0732023)

TeraScale 2

Architecture

TeraScale

TSMC

Foundry

TSMC

40 nm

Process Size

55 nm

0.716 billion

Transistors

0.956 billion

104 mm²

Die Size

256 mm²

Board Design

35W

TDP

Unknown

-

Suggested PSU

-

No outputs

Outputs

Portable Device Dependent

-

Power Connectors

None

Graphics Features

11.2 (11_0)

DirectX

10.1 (10_1)

4.4

OpenGL

3.3

1.2

OpenCL

1.1

N/A

Vulkan

N/A

-

CUDA

-

5.0

Shader Model

4.1

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