ATI Radeon HD 4890 vs AMD Radeon Sky 900

VS

ATI Radeon HD 4890

AMD Radeon Sky 900

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 4890 and 3GB VRAM Radeon Sky 900 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Radeon HD 4890 's Advantages

Lower TDP (190W vs 300W)

AMD Radeon Sky 900 's Advantages

Released 3 years and 11 months late

Boost Clock950MHz

More VRAM (3GB vs 1024GB)

Larger VRAM bandwidth (240.0GB/s vs 124.8GB/s)

992 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 4890

1.36 TFLOPS

Radeon Sky 900 +150%

3.405 TFLOPS

Radeon HD 4890

VS

Radeon Sky 900

Graphics Card

Apr 2009

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

825 MHz

-

Boost Clock

950 MHz

975 MHz

Memory Clock

1250 MHz

Memory

1024MB

Memory Size

3GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

384bit

124.8GB/s

Bandwidth

240.0GB/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

13.60 GPixel/s

Pixel Rate

30.40 GPixel/s

34.00 GTexel/s

Texture Rate

106.4 GTexel/s

-

1360 GFLOPS

FP32 (float)

3.405 TFLOPS

272.0 GFLOPS

FP64 (double)

851.2 GFLOPS

Board Design

190W

TDP

300W

450 W

Suggested PSU

700 W

2x DVI 1x S-Video

Outputs

1x DVI 1x mini-DisplayPort 1.2

2x 6-pin

Power Connectors

2x 8-pin

Graphics Processor

RV790

GPU Name

Tahiti

RV790 XT (215-0758016)

GPU Variant

Orthrus

TeraScale

Architecture

GCN 1.0

TSMC

Foundry

TSMC

55 nm

Process Size

28 nm

0.959 billion

Transistors

4.313 billion

282 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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