ATI Radeon HD 4450 vs AMD Radeon HD 7870 XT

VS

ATI Radeon HD 4450

AMD Radeon HD 7870 XT

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 4450 and 2GB VRAM Radeon HD 7870 XT to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Radeon HD 4450 's Advantages

Lower TDP (25W vs 185W)

AMD Radeon HD 7870 XT 's Advantages

Released 1 years late

Boost Clock975MHz

More VRAM (2GB vs 512GB)

Larger VRAM bandwidth (192.0GB/s vs 6.400GB/s)

1456 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 4450

0.096 TFLOPS

Radeon HD 7870 XT +3019%

2.995 TFLOPS

Radeon HD 4450

VS

Radeon HD 7870 XT

Graphics Card

Nov 2011

Release Date

Nov 2012

Radeon R700

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

925 MHz

-

Boost Clock

975 MHz

400 MHz

Memory Clock

1500 MHz

Memory

512MB

Memory Size

2GB

DDR2

Memory Type

GDDR5

64bit

Memory Bus

256bit

6.400GB/s

Bandwidth

192.0GB/s

Render Config

1

Compute Units

24

-

80

Shading Units

1536

8

TMUs

96

4

ROPs

32

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

64 KB

L2 Cache

512 KB

-

Theoretical Performance

2.400 GPixel/s

Pixel Rate

31.20 GPixel/s

4.800 GTexel/s

Texture Rate

93.60 GTexel/s

-

96.00 GFLOPS

FP32 (float)

2.995 TFLOPS

-

FP64 (double)

748.8 GFLOPS

Board Design

25W

TDP

185W

200 W

Suggested PSU

450 W

1x DVI 1x HDMI 1.3a 1x DisplayPort 1.0

Outputs

1x DVI 1x HDMI 1.4a 2x mini-DisplayPort 1.2

None

Power Connectors

2x 6-pin

Graphics Processor

RV710

GPU Name

Tahiti

RV710 (215-0725016)

GPU Variant

Tahiti LE (215-0821122)

TeraScale

Architecture

GCN 1.0

TSMC

Foundry

TSMC

55 nm

Process Size

28 nm

0.242 billion

Transistors

4.313 billion

73 mm²

Die Size

352 mm²

Graphics Features

10.1 (10_1)

DirectX

12 (11_1)

3.3

OpenGL

4.6

1.1

OpenCL

1.2

N/A

Vulkan

1.2

-

4.1

Shader Model

5.1

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