AMD Radeon R9 270 vs NVIDIA GeForce GT 640 Rev. 2

VS

AMD Radeon R9 270 NVIDIA GeForce GT 640 Rev. 2

We compared two Desktop platform GPUs: 2GB VRAM Radeon R9 270 and 1024MB VRAM GeForce GT 640 Rev. 2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 270 's Advantages

Released 6 months late

Boost Clock925MHz

More VRAM (2GB vs 1GB)

Larger VRAM bandwidth (179.2GB/s vs 40.06GB/s)

896 additional rendering cores

NVIDIA GeForce GT 640 Rev. 2 's Advantages

Lower TDP (49W vs 150W)

Score

Benchmark

FP32 (float)

Radeon R9 270 +194%

2.368 TFLOPS

GeForce GT 640 Rev. 2

0.803 TFLOPS

Radeon R9 270

VS

GeForce GT 640 Rev. 2

Graphics Card

Nov 2013

Release Date

May 2013

Volcanic Islands

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x8

Clock Speeds

900 MHz

Base Clock

-

925 MHz

Boost Clock

-

1400 MHz

Memory Clock

1252 MHz

Memory

2GB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

64bit

179.2GB/s

Bandwidth

40.06GB/s

Render Config

-

SM Count

-

20

Compute Units

-

1280

Shading Units

384

80

TMUs

32

ROPs

8

-

Tensor Cores

-

RT Cores

-

16 KB (per CU)

L1 Cache

16 KB (per SMX)

512 KB

L2 Cache

512 KB

Theoretical Performance

29.60 GPixel/s

Pixel Rate

8.368 GPixel/s

74.00 GTexel/s

Texture Rate

33.47 GTexel/s

-

FP16 (half)

-

2.368 TFLOPS

FP32 (float)

803.3 GFLOPS

148.0 GFLOPS

FP64 (double)

33.47 GFLOPS

Graphics Processor

Curacao

GPU Name

GK208

Curacao PRO (215-0848000)

GPU Variant

GK208-400-A1

GCN 1.0

Architecture

Kepler 2.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

2.8 billion

Transistors

1.02 billion

212 mm²

Die Size

87 mm²

Board Design

150W

TDP

49W

450 W

Suggested PSU

200 W

2x DVI 1x HDMI 1.4a 1x DisplayPort 1.2

Outputs

1x DVI 1x HDMI 1.4a 1x VGA

1x 6-pin

Power Connectors

None

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

3.5

5.1

Shader Model

5.1

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