AMD Radeon HD 7990 vs AMD Radeon Sky 900

VS

We compared two Desktop platform GPUs: 3GB VRAM Radeon HD 7990 and 3GB VRAM Radeon Sky 900 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 7990 's Advantages

Boost Clock has increased by 5% (1000MHz vs 950MHz)

Larger VRAM bandwidth (288.0GB/s vs 240.0GB/s)

256 additional rendering cores

AMD Radeon Sky 900 's Advantages

Lower TDP (300W vs 375W)

Score

Benchmark

FP32 (float)

Radeon HD 7990 +20%

4.096 TFLOPS

Radeon Sky 900

3.405 TFLOPS

Radeon HD 7990

VS

Radeon Sky 900

Graphics Card

Apr 2013

Release Date

Mar 2013

Southern Islands

Generation

Radeon Sky

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

950 MHz

Base Clock

825 MHz

1000 MHz

Boost Clock

950 MHz

1500 MHz

Memory Clock

1250 MHz

Memory

3GB

Memory Size

3GB

GDDR5

Memory Type

GDDR5

384bit

Memory Bus

384bit

288.0GB/s

Bandwidth

240.0GB/s

Render Config

-

SM Count

-

32

Compute Units

28

2048

Shading Units

1792

128

TMUs

112

32

ROPs

32

-

Tensor Cores

-

RT Cores

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

768 KB

L2 Cache

768 KB

Theoretical Performance

32.00 GPixel/s

Pixel Rate

30.40 GPixel/s

128.0 GTexel/s

Texture Rate

106.4 GTexel/s

-

FP16 (half)

-

4.096 TFLOPS

FP32 (float)

3.405 TFLOPS

1024 GFLOPS

FP64 (double)

851.2 GFLOPS

Graphics Processor

Malta

GPU Name

Tahiti

Malta XT (215-0849026)

GPU Variant

Orthrus

GCN 1.0

Architecture

GCN 1.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

4.313 billion

Transistors

4.313 billion

365 mm²

Die Size

352 mm²

Board Design

375W

TDP

300W

750 W

Suggested PSU

700 W

1x DVI 4x mini-DisplayPort 1.2

Outputs

1x DVI 1x mini-DisplayPort 1.2

2x 8-pin

Power Connectors

2x 8-pin

Graphics Features

12 (11_1)

DirectX

12 (11_1)

4.6

OpenGL

4.6

1.2

OpenCL

1.2

Vulkan

1.2

-

CUDA

-

5.1

Shader Model

5.1

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