NVIDIA GeForce GT 640 vs AMD Radeon R9 295X2

VS

NVIDIA GeForce GT 640

AMD Radeon R9 295X2

We compared two Desktop platform GPUs: 2GB VRAM GeForce GT 640 and 4GB VRAM Radeon R9 295X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GT 640 's Advantages

Lower TDP (65W vs 500W)

AMD Radeon R9 295X2 's Advantages

Released 1 years and 10 months late

More VRAM (4GB vs 2GB)

Larger VRAM bandwidth (320.0GB/s vs 28.51GB/s)

2432 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce GT 640

0.693 TFLOPS

Radeon R9 295X2 +727%

5.733 TFLOPS

GeForce GT 640

VS

Radeon R9 295X2

Graphics Card

Jun 2012

Release Date

Apr 2014

GeForce 600

Generation

Volcanic Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

891 MHz

Memory Clock

1250 MHz

Memory

2GB

Memory Size

4GB

DDR3

Memory Type

GDDR5

128bit

Memory Bus

512bit

28.51GB/s

Bandwidth

320.0GB/s

Render Config

-

Compute Units

44

-

384

Shading Units

2816

32

TMUs

176

16

ROPs

64

-

16 KB (per SMX)

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

1024 KB

-

Theoretical Performance

7.216 GPixel/s

Pixel Rate

65.15 GPixel/s

28.86 GTexel/s

Texture Rate

179.2 GTexel/s

-

692.7 GFLOPS

FP32 (float)

5.733 TFLOPS

28.86 GFLOPS

FP64 (double)

716.7 GFLOPS

Board Design

65W

TDP

500W

250 W

Suggested PSU

900 W

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

Outputs

1x DVI 4x mini-DisplayPort 1.2

None

Power Connectors

2x 8-pin

Graphics Processor

GK107

GPU Name

Vesuvius

GK107-300-A2

GPU Variant

Vesuvius XT (215-0852022)

Kepler

Architecture

GCN 2.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

1.27 billion

Transistors

6.2 billion

118 mm²

Die Size

438 mm²

Graphics Features

12 (11_0)

DirectX

12 (12_0)

4.6

OpenGL

4.6

3.0

OpenCL

2.0

1.1

Vulkan

1.2

3.0

CUDA

-

5.1

Shader Model

6.3

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