AMD Radeon HD 6990 vs NVIDIA GeForce GTX 490

VS

AMD Radeon HD 6990

NVIDIA GeForce GTX 490

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 6990 and 1536MB VRAM GeForce GTX 490 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6990 's Advantages

More VRAM (2GB vs 1536GB)

1056 additional rendering cores

NVIDIA GeForce GTX 490 's Advantages

Larger VRAM bandwidth (164.0GB/s vs 160.0GB/s)

Lower TDP (365W vs 375W)

Score

Benchmark

FP32 (float)

Radeon HD 6990 +118%

2.55 TFLOPS

GeForce GTX 490

1.166 TFLOPS

Radeon HD 6990

VS

GeForce GTX 490

Graphics Card

Mar 2011

Release Date

Unknown

Northern Islands

Generation

GeForce 400

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1250 MHz

Memory Clock

854 MHz

Memory

2GB

Memory Size

1536MB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

384bit

160.0GB/s

Bandwidth

164.0GB/s

Render Config

24

Compute Units

-

SM Count

15

1536

Shading Units

480

96

TMUs

60

32

ROPs

48

-

8 KB (per CU)

L1 Cache

64 KB (per SM)

512 KB

L2 Cache

768 KB

-

Theoretical Performance

26.56 GPixel/s

Pixel Rate

18.24 GPixel/s

79.68 GTexel/s

Texture Rate

36.48 GTexel/s

-

2.550 TFLOPS

FP32 (float)

1166 GFLOPS

637.4 GFLOPS

FP64 (double)

145.8 GFLOPS

Board Design

375W

TDP

365W

750 W

Suggested PSU

750 W

1x DVI 4x mini-DisplayPort 1.2

Outputs

3x DVI 1x mini-DisplayPort

2x 8-pin

Power Connectors

2x 8-pin

Graphics Processor

Antilles

GPU Name

GF100

Antilles XT (215-0807027)

GPU Variant

GF100-375-A3

TeraScale 3

Architecture

Fermi

TSMC

Foundry

TSMC

40 nm

Process Size

40 nm

2.64 billion

Transistors

3.1 billion

389 mm²

Die Size

529 mm²

Graphics Features

11.2 (11_0)

DirectX

12 (11_0)

4.4

OpenGL

4.6

1.2

OpenCL

1.1

N/A

Vulkan

N/A

-

CUDA

2.0

5.0

Shader Model

5.1

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