ATI Radeon HD 4870 vs ATI Radeon HD 3450 X2

VS

ATI Radeon HD 4870

ATI Radeon HD 3450 X2

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 4870 and 512MB VRAM Radeon HD 3450 X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Radeon HD 4870 's Advantages

Released 6 months late

Larger VRAM bandwidth (115.2GB/s vs 8.000GB/s)

760 additional rendering cores

ATI Radeon HD 3450 X2 's Advantages

Lower TDP (50W vs 150W)

Score

Benchmark

FP32 (float)

Radeon HD 4870 +2400%

1.2 TFLOPS

Radeon HD 3450 X2

0.048 TFLOPS

Radeon HD 4870

VS

Radeon HD 3450 X2

Graphics Card

Jun 2008

Release Date

Dec 2007

Radeon R700

Generation

Radeon R600

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

900 MHz

Memory Clock

500 MHz

Memory

512MB

Memory Size

512MB

GDDR5

Memory Type

DDR2

256bit

Memory Bus

64bit

115.2GB/s

Bandwidth

8.000GB/s

Render Config

10

Compute Units

2

-

800

Shading Units

40

TMUs

4

16

ROPs

4

-

16 KB (per CU)

L1 Cache

-

256 KB

L2 Cache

64 KB

-

Theoretical Performance

12.00 GPixel/s

Pixel Rate

2.400 GPixel/s

30.00 GTexel/s

Texture Rate

2.400 GTexel/s

-

1200 GFLOPS

FP32 (float)

48.00 GFLOPS

240.0 GFLOPS

FP64 (double)

-

Board Design

150W

TDP

50W

450 W

Suggested PSU

250 W

2x DVI 1x S-Video

Outputs

2x DMS-59

2x 6-pin

Power Connectors

None

Graphics Processor

RV770

GPU Name

RV620

RV770 XT (215-0669049)

GPU Variant

RV620 LE

TeraScale

Architecture

TeraScale

TSMC

Foundry

TSMC

55 nm

Process Size

55 nm

0.956 billion

Transistors

0.181 billion

256 mm²

Die Size

67 mm²

Graphics Features

10.1 (10_1)

DirectX

10.1 (10_1)

3.3

OpenGL

3.3

1.1

OpenCL

N/A

Vulkan

N/A

-

4.1

Shader Model

4.1

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