AMD Radeon Sky 500 vs NVIDIA GeForce GT 640

VS

AMD Radeon Sky 500

NVIDIA GeForce GT 640

We compared two Desktop platform GPUs: 4GB VRAM Radeon Sky 500 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 Sky 500 's Advantages

Released 9 months late

More VRAM (4GB vs 2GB)

Larger VRAM bandwidth (153.6GB/s vs 28.51GB/s)

896 additional rendering cores

NVIDIA GeForce GT 640 's Advantages

Lower TDP (65W vs 150W)

Score

Benchmark

FP32 (float)

Radeon Sky 500 +250%

2.432 TFLOPS

GeForce GT 640

0.693 TFLOPS

Radeon Sky 500

VS

GeForce GT 640

Graphics Card

Mar 2013

Release Date

Jun 2012

Radeon Sky

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

1200 MHz

Memory Clock

891 MHz

Memory

4GB

Memory Size

2GB

GDDR5

Memory Type

DDR3

256bit

Memory Bus

128bit

153.6GB/s

Bandwidth

28.51GB/s

Render Config

20

Compute Units

-

1280

Shading Units

384

80

TMUs

32

ROPs

16

-

16 KB (per CU)

L1 Cache

16 KB (per SMX)

512 KB

L2 Cache

256 KB

-

Theoretical Performance

30.40 GPixel/s

Pixel Rate

7.216 GPixel/s

76.00 GTexel/s

Texture Rate

28.86 GTexel/s

-

2.432 TFLOPS

FP32 (float)

692.7 GFLOPS

152.0 GFLOPS

FP64 (double)

28.86 GFLOPS

Board Design

150W

TDP

65W

450 W

Suggested PSU

250 W

1x DisplayPort 1.2

Outputs

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

1x 6-pin

Power Connectors

None

Graphics Processor

Pitcairn

GPU Name

GK107

Pitcairn XT GL (215-0828073)

GPU Variant

GK107-300-A2

GCN 1.0

Architecture

Kepler

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

2.8 billion

Transistors

1.27 billion

212 mm²

Die Size

118 mm²

Graphics Features

12 (11_1)

DirectX

12 (11_0)

4.6

OpenGL

4.6

1.2

OpenCL

3.0

1.2

Vulkan

1.1

-

CUDA

3.0

5.1

Shader Model

5.1

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