AMD Radeon HD 7870 XT vs AMD Radeon HD 7450 OEM

VS

AMD Radeon HD 7870 XT

AMD Radeon HD 7450 OEM

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 7870 XT and 512MB VRAM Radeon HD 7450 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 7870 XT 's Advantages

Released 10 months late

Boost Clock975MHz

More VRAM (2GB vs 512GB)

Larger VRAM bandwidth (192.0GB/s vs 8.528GB/s)

1376 additional rendering cores

AMD Radeon HD 7450 OEM 's Advantages

Lower TDP (18W vs 185W)

Score

Benchmark

FP32 (float)

Radeon HD 7870 XT +1397%

2.995 TFLOPS

Radeon HD 7450 OEM

0.2 TFLOPS

Radeon HD 7870 XT

VS

Radeon HD 7450 OEM

Graphics Card

Nov 2012

Release Date

Jan 2012

Southern Islands

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

925 MHz

Base Clock

-

975 MHz

Boost Clock

-

1500 MHz

Memory Clock

533 MHz

Memory

2GB

Memory Size

512MB

GDDR5

Memory Type

GDDR3

256bit

Memory Bus

64bit

192.0GB/s

Bandwidth

8.528GB/s

Render Config

24

Compute Units

2

-

1536

Shading Units

160

96

TMUs

8

32

ROPs

4

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

512 KB

L2 Cache

128 KB

-

Theoretical Performance

31.20 GPixel/s

Pixel Rate

2.500 GPixel/s

93.60 GTexel/s

Texture Rate

5.000 GTexel/s

-

2.995 TFLOPS

FP32 (float)

200.0 GFLOPS

748.8 GFLOPS

FP64 (double)

-

Board Design

185W

TDP

18W

450 W

Suggested PSU

200 W

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

Outputs

1x DVI 1x HDMI 1.3a

2x 6-pin

Power Connectors

None

Graphics Processor

Tahiti

GPU Name

Caicos

Tahiti LE (215-0821122)

GPU Variant

Caimour

GCN 1.0

Architecture

TeraScale 2

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

4.313 billion

Transistors

0.37 billion

352 mm²

Die Size

67 mm²

Graphics Features

12 (11_1)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

1.2

OpenCL

1.2

Vulkan

N/A

-

5.1

Shader Model

5.0

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