NVIDIA GeForce GT 645 OEM vs AMD Radeon HD 6670

VS

NVIDIA GeForce GT 645 OEM

AMD Radeon HD 6670

We compared two Desktop platform GPUs: 1024MB VRAM GeForce GT 645 OEM and 1024MB VRAM Radeon HD 6670 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GT 645 OEM 's Advantages

Released 1 years late

Larger VRAM bandwidth (91.87GB/s vs 64.00GB/s)

AMD Radeon HD 6670 's Advantages

192 additional rendering cores

Lower TDP (66W vs 102W)

Score

Benchmark

FP32 (float)

GeForce GT 645 OEM +16%

0.894 TFLOPS

Radeon HD 6670

0.768 TFLOPS

GeForce GT 645 OEM

VS

Radeon HD 6670

Graphics Card

Apr 2012

Release Date

Apr 2011

GeForce 600

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

957 MHz

Memory Clock

1000 MHz

Memory

1024MB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

192bit

Memory Bus

128bit

91.87GB/s

Bandwidth

64.00GB/s

Render Config

-

Compute Units

6

SM Count

-

288

Shading Units

480

48

TMUs

24

ROPs

8

-

64 KB (per SM)

L1 Cache

8 KB (per CU)

384 KB

L2 Cache

256 KB

-

Theoretical Performance

9.312 GPixel/s

Pixel Rate

6.400 GPixel/s

37.25 GTexel/s

Texture Rate

19.20 GTexel/s

-

894.0 GFLOPS

FP32 (float)

768.0 GFLOPS

74.50 GFLOPS

FP64 (double)

-

Board Design

102W

TDP

66W

300 W

Suggested PSU

250 W

2x DVI 1x mini-HDMI 1.3a

Outputs

1x DVI 1x HDMI 1.3a 1x VGA

-

Power Connectors

None

Graphics Processor

GF114

GPU Name

Turks

-

GPU Variant

Turks XT (215-0803000)

Fermi 2.0

Architecture

TeraScale 2

TSMC

Foundry

TSMC

40 nm

Process Size

40 nm

1.95 billion

Transistors

0.716 billion

332 mm²

Die Size

118 mm²

Graphics Features

12 (11_0)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

1.1

OpenCL

1.2

N/A

Vulkan

N/A

2.1

CUDA

-

5.1

Shader Model

5.0

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