AMD Radeon HD 6990 vs AMD Radeon HD 6450

VS

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 6990 and 512MB VRAM Radeon HD 6450 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6990 's Advantages

Larger VRAM bandwidth (160.0GB/s vs 25.60GB/s)

1376 additional rendering cores

AMD Radeon HD 6450 's Advantages

Lower TDP (18W vs 375W)

Score

Benchmark

FP32 (float)

Radeon HD 6990 +1175%

2.55 TFLOPS

Radeon HD 6450

0.2 TFLOPS

Radeon HD 6990

VS

Radeon HD 6450

Graphics Card

Mar 2011

Release Date

Apr 2011

Northern Islands

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

1250 MHz

Memory Clock

800 MHz

Memory

2GB

Memory Size

512MB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

64bit

160.0GB/s

Bandwidth

25.60GB/s

Render Config

-

SM Count

-

24

Compute Units

2

1536

Shading Units

160

96

TMUs

8

32

ROPs

4

-

Tensor Cores

-

RT Cores

-

8 KB (per CU)

L1 Cache

8 KB (per CU)

512 KB

L2 Cache

128 KB

Theoretical Performance

26.56 GPixel/s

Pixel Rate

2.500 GPixel/s

79.68 GTexel/s

Texture Rate

5.000 GTexel/s

-

FP16 (half)

-

2.550 TFLOPS

FP32 (float)

200.0 GFLOPS

637.4 GFLOPS

FP64 (double)

-

Graphics Processor

Antilles

GPU Name

Caicos

Antilles XT (215-0807027)

GPU Variant

Caicos PRO

TeraScale 3

Architecture

TeraScale 2

TSMC

Foundry

TSMC

40 nm

Process Size

40 nm

2.64 billion

Transistors

0.37 billion

389 mm²

Die Size

67 mm²

Board Design

375W

TDP

18W

750 W

Suggested PSU

200 W

1x DVI 4x mini-DisplayPort 1.2

Outputs

1x DVI 1x HDMI 1.3a 1x VGA

2x 8-pin

Power Connectors

None

Graphics Features

11.2 (11_0)

DirectX

11.2 (11_0)

4.4

OpenGL

4.4

1.2

OpenCL

1.2

N/A

Vulkan

N/A

-

CUDA

-

5.0

Shader Model

5.0

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