AMD Radeon HD 6990 vs NVIDIA GeForce GT 640

VS

AMD Radeon HD 6990

NVIDIA GeForce GT 640

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 6990 and 2GB VRAM GeForce GT 640 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 28.51GB/s)

1152 additional rendering cores

NVIDIA GeForce GT 640 's Advantages

Released 1 years and 3 months late

Lower TDP (65W vs 375W)

Score

Benchmark

FP32 (float)

Radeon HD 6990 +267%

2.55 TFLOPS

GeForce GT 640

0.693 TFLOPS

Radeon HD 6990

VS

GeForce GT 640

Graphics Card

Mar 2011

Release Date

Jun 2012

Northern Islands

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

1250 MHz

Memory Clock

891 MHz

Memory

2GB

Memory Size

2GB

GDDR5

Memory Type

DDR3

256bit

Memory Bus

128bit

160.0GB/s

Bandwidth

28.51GB/s

Render Config

24

Compute Units

-

1536

Shading Units

384

96

TMUs

32

ROPs

16

-

8 KB (per CU)

L1 Cache

16 KB (per SMX)

512 KB

L2 Cache

256 KB

-

Theoretical Performance

26.56 GPixel/s

Pixel Rate

7.216 GPixel/s

79.68 GTexel/s

Texture Rate

28.86 GTexel/s

-

2.550 TFLOPS

FP32 (float)

692.7 GFLOPS

637.4 GFLOPS

FP64 (double)

28.86 GFLOPS

Board Design

375W

TDP

65W

750 W

Suggested PSU

250 W

1x DVI 4x mini-DisplayPort 1.2

Outputs

1x DVI 1x HDMI 1.4a 1x DisplayPort 1.2

2x 8-pin

Power Connectors

None

Graphics Processor

Antilles

GPU Name

GK107

Antilles XT (215-0807027)

GPU Variant

GK107-300-A2

TeraScale 3

Architecture

Kepler

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

2.64 billion

Transistors

1.27 billion

389 mm²

Die Size

118 mm²

Graphics Features

11.2 (11_0)

DirectX

12 (11_0)

4.4

OpenGL

4.6

1.2

OpenCL

3.0

N/A

Vulkan

1.1

-

CUDA

3.0

5.0

Shader Model

5.1

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