AMD Radeon Sky 900 vs ATI Radeon HD 2900 XTX

VS

AMD Radeon Sky 900

ATI Radeon HD 2900 XTX

We compared two Desktop platform GPUs: 3GB VRAM Radeon Sky 900 and 512MB VRAM Radeon HD 2900 XTX to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon Sky 900 's Advantages

Boost Clock950MHz

More VRAM (3GB vs 512GB)

Larger VRAM bandwidth (240.0GB/s vs 106.0GB/s)

1472 additional rendering cores

ATI Radeon HD 2900 XTX 's Advantages

Lower TDP (240W vs 300W)

Score

Benchmark

FP32 (float)

Radeon Sky 900 +615%

3.405 TFLOPS

Radeon HD 2900 XTX

0.476 TFLOPS

Radeon Sky 900

VS

Radeon HD 2900 XTX

Graphics Card

Mar 2013

Release Date

Unknown

Radeon Sky

Generation

Radeon R600

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 1.0 x16

Clock Speeds

825 MHz

Base Clock

-

950 MHz

Boost Clock

-

1250 MHz

Memory Clock

828 MHz

Memory

3GB

Memory Size

512MB

GDDR5

Memory Type

GDDR3

384bit

Memory Bus

512bit

240.0GB/s

Bandwidth

106.0GB/s

Render Config

28

Compute Units

4

-

1792

Shading Units

320

112

TMUs

16

32

ROPs

16

-

16 KB (per CU)

L1 Cache

-

768 KB

L2 Cache

256 KB

-

Theoretical Performance

30.40 GPixel/s

Pixel Rate

11.89 GPixel/s

106.4 GTexel/s

Texture Rate

11.89 GTexel/s

-

3.405 TFLOPS

FP32 (float)

475.5 GFLOPS

851.2 GFLOPS

FP64 (double)

-

Board Design

300W

TDP

240W

700 W

Suggested PSU

550 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

R600

Orthrus

GPU Variant

R600 XTX A11 (215RGMDKA11FG)

GCN 1.0

Architecture

TeraScale

TSMC

Foundry

TSMC

28 nm

Process Size

80 nm

4.313 billion

Transistors

0.72 billion

352 mm²

Die Size

420 mm²

Graphics Features

12 (11_1)

DirectX

10.0 (10_0)

4.6

OpenGL

3.3 (full) 4.0 (partial)

1.2

OpenCL

N/A

1.2

Vulkan

N/A

-

5.1

Shader Model

4.0

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