NVIDIA GeForce GT 640 Rev. 2 vs AMD Radeon R7 340 OEM

VS

NVIDIA GeForce GT 640 Rev. 2 AMD Radeon R7 340 OEM

We compared two Desktop platform GPUs: 1024MB VRAM GeForce GT 640 Rev. 2 and 2GB VRAM Radeon R7 340 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GT 640 Rev. 2 's Advantages

Lower TDP (49W vs 50W)

AMD Radeon R7 340 OEM 's Advantages

Released 2 years late

Boost Clock780MHz

More VRAM (2GB vs 1GB)

Larger VRAM bandwidth (64.00GB/s vs 40.06GB/s)

Score

Benchmark

FP32 (float)

GeForce GT 640 Rev. 2 +34%

0.803 TFLOPS

Radeon R7 340 OEM

0.599 TFLOPS

GeForce GT 640 Rev. 2

VS

Radeon R7 340 OEM

Graphics Card

May 2013

Release Date

May 2015

GeForce 600

Generation

Pirate Islands

Desktop

Type

Desktop

PCIe 2.0 x8

Bus Interface

PCIe 3.0 x8

Clock Speeds

-

Base Clock

730 MHz

-

Boost Clock

780 MHz

1252 MHz

Memory Clock

1000 MHz

Memory

1024MB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

64bit

Memory Bus

128bit

40.06GB/s

Bandwidth

64.00GB/s

Render Config

-

SM Count

-

Compute Units

6

384

Shading Units

384

32

TMUs

24

8

ROPs

8

-

Tensor Cores

-

RT Cores

-

16 KB (per SMX)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

256 KB

Theoretical Performance

8.368 GPixel/s

Pixel Rate

6.240 GPixel/s

33.47 GTexel/s

Texture Rate

18.72 GTexel/s

-

FP16 (half)

-

803.3 GFLOPS

FP32 (float)

599.0 GFLOPS

33.47 GFLOPS

FP64 (double)

37.44 GFLOPS

Graphics Processor

GK208

GPU Name

Oland

GK208-400-A1

GPU Variant

-

Kepler 2.0

Architecture

GCN 1.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

1.02 billion

Transistors

0.95 billion

87 mm²

Die Size

77 mm²

Board Design

49W

TDP

50W

200 W

Suggested PSU

250 W

1x DVI 1x HDMI 1.4a 1x VGA

Outputs

1x DVI 1x HDMI 1.4a 1x VGA

None

Power Connectors

None

Graphics Features

12 (11_0)

DirectX

12 (11_1)

4.6

OpenGL

4.6

3.0

OpenCL

1.2

1.1

Vulkan

1.2

3.5

CUDA

-

5.1

Shader Model

5.1

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