AMD Radeon HD 6970 vs NVIDIA GeForce GT 645 OEM

VS

AMD Radeon HD 6970

NVIDIA GeForce GT 645 OEM

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 6970 and 1024MB VRAM GeForce GT 645 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6970 's Advantages

More VRAM (2GB vs 1024GB)

Larger VRAM bandwidth (176.0GB/s vs 91.87GB/s)

1248 additional rendering cores

NVIDIA GeForce GT 645 OEM 's Advantages

Released 1 years and 4 months late

Lower TDP (102W vs 250W)

Score

Benchmark

FP32 (float)

Radeon HD 6970 +202%

2.703 TFLOPS

GeForce GT 645 OEM

0.894 TFLOPS

Radeon HD 6970

VS

GeForce GT 645 OEM

Graphics Card

Dec 2010

Release Date

Apr 2012

Northern Islands

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1375 MHz

Memory Clock

957 MHz

Memory

2GB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

192bit

176.0GB/s

Bandwidth

91.87GB/s

Render Config

24

Compute Units

-

SM Count

6

1536

Shading Units

288

96

TMUs

48

32

ROPs

24

-

8 KB (per CU)

L1 Cache

64 KB (per SM)

512 KB

L2 Cache

384 KB

-

Theoretical Performance

28.16 GPixel/s

Pixel Rate

9.312 GPixel/s

84.48 GTexel/s

Texture Rate

37.25 GTexel/s

-

2.703 TFLOPS

FP32 (float)

894.0 GFLOPS

675.8 GFLOPS

FP64 (double)

74.50 GFLOPS

Board Design

250W

TDP

102W

600 W

Suggested PSU

300 W

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

Outputs

2x DVI 1x mini-HDMI 1.3a

1x 6-pin + 1x 8-pin

Power Connectors

-

Graphics Processor

Cayman

GPU Name

GF114

Cayman XT (215-0807007)

GPU Variant

-

TeraScale 3

Architecture

Fermi 2.0

TSMC

Foundry

TSMC

40 nm

Process Size

40 nm

2.64 billion

Transistors

1.95 billion

389 mm²

Die Size

332 mm²

Graphics Features

11.2 (11_0)

DirectX

12 (11_0)

4.4

OpenGL

4.6

1.2

OpenCL

1.1

N/A

Vulkan

N/A

-

CUDA

2.1

5.0

Shader Model

5.1

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