AMD Radeon HD 6970 vs NVIDIA GeForce GTX 660 OEM

VS

AMD Radeon HD 6970 NVIDIA GeForce GTX 660 OEM

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 6970 and 1536MB VRAM GeForce GTX 660 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 1GB)

Larger VRAM bandwidth (176.0GB/s vs 134.4GB/s)

384 additional rendering cores

NVIDIA GeForce GTX 660 OEM 's Advantages

Released 1 years and 8 months late

Boost Clock888MHz

Lower TDP (130W vs 250W)

Score

Benchmark

FP32 (float)

Radeon HD 6970 +32%

2.703 TFLOPS

GeForce GTX 660 OEM

2.046 TFLOPS

Radeon HD 6970

VS

GeForce GTX 660 OEM

Graphics Card

Dec 2010

Release Date

Aug 2012

Northern Islands

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

823 MHz

-

Boost Clock

888 MHz

1375 MHz

Memory Clock

1400 MHz

Memory

2GB

Memory Size

1536MB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

192bit

176.0GB/s

Bandwidth

134.4GB/s

Render Config

-

SM Count

-

24

Compute Units

-

1536

Shading Units

1152

96

TMUs

96

32

ROPs

24

-

Tensor Cores

-

RT Cores

-

8 KB (per CU)

L1 Cache

16 KB (per SMX)

512 KB

L2 Cache

384 KB

Theoretical Performance

28.16 GPixel/s

Pixel Rate

21.31 GPixel/s

84.48 GTexel/s

Texture Rate

85.25 GTexel/s

-

FP16 (half)

-

2.703 TFLOPS

FP32 (float)

2.046 TFLOPS

675.8 GFLOPS

FP64 (double)

85.25 GFLOPS

Graphics Processor

Cayman

GPU Name

GK104

Cayman XT (215-0807007)

GPU Variant

GK104-200-KD-A2

TeraScale 3

Architecture

Kepler

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

2.64 billion

Transistors

3.54 billion

389 mm²

Die Size

294 mm²

Board Design

250W

TDP

130W

600 W

Suggested PSU

300 W

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

Outputs

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

1x 6-pin + 1x 8-pin

Power Connectors

1x 6-pin

Graphics Features

11.2 (11_0)

DirectX

12 (11_0)

4.4

OpenGL

4.6

1.2

OpenCL

3.0

N/A

Vulkan

1.1

-

CUDA

3.0

5.0

Shader Model

5.1

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