NVIDIA GeForce GT 645 OEM vs AMD Radeon HD 6850

VS

NVIDIA GeForce GT 645 OEM

AMD Radeon HD 6850

We compared two Desktop platform GPUs: 1024MB VRAM GeForce GT 645 OEM and 1024MB VRAM Radeon HD 6850 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 and 6 months late

Lower TDP (102W vs 127W)

AMD Radeon HD 6850 's Advantages

Larger VRAM bandwidth (128.0GB/s vs 91.87GB/s)

672 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce GT 645 OEM

0.894 TFLOPS

Radeon HD 6850 +66%

1.488 TFLOPS

GeForce GT 645 OEM

VS

Radeon HD 6850

Graphics Card

Apr 2012

Release Date

Oct 2010

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

256bit

91.87GB/s

Bandwidth

128.0GB/s

Render Config

-

Compute Units

12

6

SM Count

-

288

Shading Units

960

48

TMUs

48

24

ROPs

32

-

64 KB (per SM)

L1 Cache

8 KB (per CU)

384 KB

L2 Cache

512 KB

-

Theoretical Performance

9.312 GPixel/s

Pixel Rate

24.80 GPixel/s

37.25 GTexel/s

Texture Rate

37.20 GTexel/s

-

894.0 GFLOPS

FP32 (float)

1488 GFLOPS

74.50 GFLOPS

FP64 (double)

-

Board Design

102W

TDP

127W

300 W

Suggested PSU

300 W

2x DVI 1x mini-HDMI 1.3a

Outputs

2x DVI 1x HDMI 1.3a 2x mini-DisplayPort 1.1

-

Power Connectors

1x 6-pin

Graphics Processor

GF114

GPU Name

Barts

-

GPU Variant

Barts PRO (215-0798006)

Fermi 2.0

Architecture

TeraScale 2

TSMC

Foundry

TSMC

40 nm

Process Size

40 nm

1.95 billion

Transistors

1.7 billion

332 mm²

Die Size

255 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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