AMD Radeon Sky 900 vs ATI Radeon HD 4860

VS

AMD Radeon Sky 900

ATI Radeon HD 4860

We compared two Desktop platform GPUs: 3GB VRAM Radeon Sky 900 and 512MB VRAM Radeon HD 4860 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon Sky 900 's Advantages

Released 3 years and 6 months late

Boost Clock950MHz

More VRAM (3GB vs 512GB)

Larger VRAM bandwidth (240.0GB/s vs 96.00GB/s)

1152 additional rendering cores

ATI Radeon HD 4860 's Advantages

Lower TDP (130W vs 300W)

Score

Benchmark

FP32 (float)

Radeon Sky 900 +280%

3.405 TFLOPS

Radeon HD 4860

0.896 TFLOPS

Radeon Sky 900

VS

Radeon HD 4860

Graphics Card

Mar 2013

Release Date

Sep 2009

Radeon Sky

Generation

Radeon R700

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

825 MHz

Base Clock

-

950 MHz

Boost Clock

-

1250 MHz

Memory Clock

750 MHz

Memory

3GB

Memory Size

512MB

GDDR5

Memory Type

GDDR5

384bit

Memory Bus

256bit

240.0GB/s

Bandwidth

96.00GB/s

Render Config

28

Compute Units

8

-

1792

Shading Units

640

112

TMUs

32

ROPs

16

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

768 KB

L2 Cache

256 KB

-

Theoretical Performance

30.40 GPixel/s

Pixel Rate

11.20 GPixel/s

106.4 GTexel/s

Texture Rate

22.40 GTexel/s

-

3.405 TFLOPS

FP32 (float)

896.0 GFLOPS

851.2 GFLOPS

FP64 (double)

179.2 GFLOPS

Board Design

300W

TDP

130W

700 W

Suggested PSU

300 W

1x DVI 1x mini-DisplayPort 1.2

Outputs

2x DVI 1x S-Video

2x 8-pin

Power Connectors

2x 6-pin

Graphics Processor

Tahiti

GPU Name

RV790

Orthrus

GPU Variant

RV790 GT

GCN 1.0

Architecture

TeraScale

TSMC

Foundry

TSMC

28 nm

Process Size

55 nm

4.313 billion

Transistors

0.959 billion

352 mm²

Die Size

282 mm²

Graphics Features

12 (11_1)

DirectX

10.1 (10_1)

4.6

OpenGL

3.3

1.2

OpenCL

1.1

1.2

Vulkan

N/A

-

5.1

Shader Model

4.1

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