AMD Radeon HD 6870 X2 vs ATI Radeon HD 3450 PCI

VS

AMD Radeon HD 6870 X2

ATI Radeon HD 3450 PCI

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6870 X2 and 512MB VRAM Radeon HD 3450 PCI to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6870 X2 's Advantages

Released 3 years and 6 months late

More VRAM (1024GB vs 512GB)

Larger VRAM bandwidth (134.4GB/s vs 6.400GB/s)

1080 additional rendering cores

ATI Radeon HD 3450 PCI 's Advantages

Lower TDP (25W vs 300W)

Score

Benchmark

FP32 (float)

Radeon HD 6870 X2 +4100%

2.016 TFLOPS

Radeon HD 3450 PCI

0.048 TFLOPS

Radeon HD 6870 X2

VS

Radeon HD 3450 PCI

Graphics Card

Jul 2011

Release Date

Jan 2008

Northern Islands

Generation

Radeon R600

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCI

Clock Speeds

-

1050 MHz

Memory Clock

400 MHz

Memory

1024MB

Memory Size

512MB

GDDR5

Memory Type

DDR2

256bit

Memory Bus

64bit

134.4GB/s

Bandwidth

6.400GB/s

Render Config

14

Compute Units

2

-

1120

Shading Units

40

56

TMUs

4

32

ROPs

4

-

8 KB (per CU)

L1 Cache

-

512 KB

L2 Cache

64 KB

-

Theoretical Performance

28.80 GPixel/s

Pixel Rate

2.400 GPixel/s

50.40 GTexel/s

Texture Rate

2.400 GTexel/s

-

2.016 TFLOPS

FP32 (float)

48.00 GFLOPS

-

Board Design

300W

TDP

25W

700 W

Suggested PSU

200 W

2x DVI 1x HDMI 1.3a 2x mini-DisplayPort 1.1

Outputs

1x DVI 1x S-Video

-

Power Connectors

None

Graphics Processor

Barts

GPU Name

RV620

Barts XT (215-0798000)

GPU Variant

RV620 LE

TeraScale 2

Architecture

TeraScale

TSMC

Foundry

TSMC

40 nm

Process Size

55 nm

1.7 billion

Transistors

0.181 billion

255 mm²

Die Size

67 mm²

Graphics Features

11.2 (11_0)

DirectX

10.1 (10_1)

4.4

OpenGL

3.3

1.2

OpenCL

N/A

Vulkan

N/A

-

5.0

Shader Model

4.1

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