ATI Radeon HD 4870 X2 vs AMD Radeon Sky 500

VS

ATI Radeon HD 4870 X2 AMD Radeon Sky 500

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 4870 X2 and 4GB VRAM Radeon Sky 500 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon Sky 500 's Advantages

Released 4 years and 7 months late

More VRAM (4GB vs 1GB)

Larger VRAM bandwidth (153.6GB/s vs 115.2GB/s)

480 additional rendering cores

Lower TDP (150W vs 286W)

Score

Benchmark

FP32 (float)

Radeon HD 4870 X2

1.2 TFLOPS

Radeon Sky 500 +102%

2.432 TFLOPS

Radeon HD 4870 X2

VS

Radeon Sky 500

Graphics Card

Aug 2008

Release Date

Mar 2013

Radeon R700

Generation

Radeon Sky

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

900 MHz

Memory Clock

1200 MHz

Memory

1024MB

Memory Size

4GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

256bit

115.2GB/s

Bandwidth

153.6GB/s

Render Config

-

SM Count

-

10

Compute Units

20

800

Shading Units

1280

40

TMUs

80

16

ROPs

32

-

Tensor Cores

-

RT Cores

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

512 KB

Theoretical Performance

12.00 GPixel/s

Pixel Rate

30.40 GPixel/s

30.00 GTexel/s

Texture Rate

76.00 GTexel/s

-

FP16 (half)

-

1200 GFLOPS

FP32 (float)

2.432 TFLOPS

240.0 GFLOPS

FP64 (double)

152.0 GFLOPS

Graphics Processor

R700

GPU Name

Pitcairn

R700 XT (215-0669045)

GPU Variant

Pitcairn XT GL (215-0828073)

TeraScale

Architecture

GCN 1.0

TSMC

Foundry

TSMC

55 nm

Process Size

28 nm

0.956 billion

Transistors

2.8 billion

256 mm²

Die Size

212 mm²

Board Design

286W

TDP

150W

600 W

Suggested PSU

450 W

2x DVI 1x S-Video

Outputs

1x DisplayPort 1.2

1x 6-pin + 1x 8-pin

Power Connectors

1x 6-pin

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

-

CUDA

-

4.1

Shader Model

5.1

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