NVIDIA GeForce GT 645 OEM vs AMD Radeon R9 270X

VS

NVIDIA GeForce GT 645 OEM

AMD Radeon R9 270X

We compared two Desktop platform GPUs: 1024MB VRAM GeForce GT 645 OEM and 2GB VRAM Radeon R9 270X to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GT 645 OEM 's Advantages

Lower TDP (102W vs 180W)

AMD Radeon R9 270X 's Advantages

Released 1 years and 6 months late

Boost Clock1050MHz

More VRAM (2GB vs 1024GB)

Larger VRAM bandwidth (179.2GB/s vs 91.87GB/s)

992 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce GT 645 OEM

0.894 TFLOPS

Radeon R9 270X +200%

2.688 TFLOPS

GeForce GT 645 OEM

VS

Radeon R9 270X

Graphics Card

Apr 2012

Release Date

Oct 2013

GeForce 600

Generation

Volcanic Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

1000 MHz

-

Boost Clock

1050 MHz

957 MHz

Memory Clock

1400 MHz

Memory

1024MB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

192bit

Memory Bus

256bit

91.87GB/s

Bandwidth

179.2GB/s

Render Config

-

Compute Units

20

6

SM Count

-

288

Shading Units

1280

48

TMUs

80

24

ROPs

32

-

64 KB (per SM)

L1 Cache

16 KB (per CU)

384 KB

L2 Cache

512 KB

-

Theoretical Performance

9.312 GPixel/s

Pixel Rate

33.60 GPixel/s

37.25 GTexel/s

Texture Rate

84.00 GTexel/s

-

894.0 GFLOPS

FP32 (float)

2.688 TFLOPS

74.50 GFLOPS

FP64 (double)

168.0 GFLOPS

Board Design

102W

TDP

180W

300 W

Suggested PSU

450 W

2x DVI 1x mini-HDMI 1.3a

Outputs

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

-

Power Connectors

2x 6-pin

Graphics Processor

GF114

GPU Name

Curacao

-

GPU Variant

Curacao XT (215-0848004)

Fermi 2.0

Architecture

GCN 1.0

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

1.95 billion

Transistors

2.8 billion

332 mm²

Die Size

212 mm²

Graphics Features

12 (11_0)

DirectX

12 (11_1)

4.6

OpenGL

4.6

1.1

OpenCL

1.2

N/A

Vulkan

1.2

2.1

CUDA

-

5.1

Shader Model

5.1

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