AMD Radeon HD 7870 XT vs ATI Radeon HD 3550

VS

AMD Radeon HD 7870 XT

ATI Radeon HD 3550

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 7870 XT and 512MB VRAM Radeon HD 3550 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 4 years and 3 months late

Boost Clock975MHz

More VRAM (2GB vs 512GB)

Larger VRAM bandwidth (192.0GB/s vs 6.336GB/s)

1496 additional rendering cores

ATI Radeon HD 3550 's Advantages

Lower TDP (30W vs 185W)

Score

Benchmark

FP32 (float)

Radeon HD 7870 XT +6139%

2.995 TFLOPS

Radeon HD 3550

0.048 TFLOPS

Radeon HD 7870 XT

VS

Radeon HD 3550

Graphics Card

Nov 2012

Release Date

Aug 2008

Southern Islands

Generation

Radeon R600

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

396 MHz

Memory

2GB

Memory Size

512MB

GDDR5

Memory Type

DDR2

256bit

Memory Bus

64bit

192.0GB/s

Bandwidth

6.336GB/s

Render Config

24

Compute Units

2

-

1536

Shading Units

40

96

TMUs

4

32

ROPs

4

-

16 KB (per CU)

L1 Cache

-

512 KB

L2 Cache

64 KB

-

Theoretical Performance

31.20 GPixel/s

Pixel Rate

2.376 GPixel/s

93.60 GTexel/s

Texture Rate

2.376 GTexel/s

-

2.995 TFLOPS

FP32 (float)

47.52 GFLOPS

748.8 GFLOPS

FP64 (double)

-

Board Design

185W

TDP

30W

450 W

Suggested PSU

200 W

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

Outputs

2x DisplayPort

2x 6-pin

Power Connectors

None

Graphics Processor

Tahiti

GPU Name

RV620

Tahiti LE (215-0821122)

GPU Variant

RV620 PRO (215-0670006)

GCN 1.0

Architecture

TeraScale

TSMC

Foundry

TSMC

28 nm

Process Size

55 nm

4.313 billion

Transistors

0.181 billion

352 mm²

Die Size

67 mm²

Graphics Features

12 (11_1)

DirectX

10.1 (10_1)

4.6

OpenGL

3.3

1.2

OpenCL

N/A

1.2

Vulkan

N/A

-

5.1

Shader Model

4.1

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