ATI Radeon HD 4870 X2 vs AMD Radeon Sky 700

VS

ATI Radeon HD 4870 X2

AMD Radeon Sky 700

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 4870 X2 and 6GB VRAM Radeon Sky 700 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon Sky 700 's Advantages

Released 4 years and 7 months late

More VRAM (6GB vs 1024GB)

Larger VRAM bandwidth (264.0GB/s vs 115.2GB/s)

992 additional rendering cores

Lower TDP (225W vs 286W)

Score

Benchmark

FP32 (float)

Radeon HD 4870 X2

1.2 TFLOPS

Radeon Sky 700 +168%

3.226 TFLOPS

Radeon HD 4870 X2

VS

Radeon Sky 700

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

-

900 MHz

Memory Clock

1375 MHz

Memory

1024MB

Memory Size

6GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

384bit

115.2GB/s

Bandwidth

264.0GB/s

Render Config

10

Compute Units

28

-

800

Shading Units

1792

40

TMUs

112

16

ROPs

32

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

768 KB

-

Theoretical Performance

12.00 GPixel/s

Pixel Rate

28.80 GPixel/s

30.00 GTexel/s

Texture Rate

100.8 GTexel/s

-

1200 GFLOPS

FP32 (float)

3.226 TFLOPS

240.0 GFLOPS

FP64 (double)

806.4 GFLOPS

Board Design

286W

TDP

225W

600 W

Suggested PSU

550 W

2x DVI 1x S-Video

Outputs

1x DisplayPort 1.2

1x 6-pin + 1x 8-pin

Power Connectors

1x 8-pin

Graphics Processor

R700

GPU Name

Tahiti

R700 XT (215-0669045)

GPU Variant

Tahiti PRO GL

TeraScale

Architecture

GCN 1.0

TSMC

Foundry

TSMC

55 nm

Process Size

28 nm

0.956 billion

Transistors

4.313 billion

256 mm²

Die Size

352 mm²

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

-

4.1

Shader Model

5.1

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