AMD Radeon HD 8970 OEM vs NVIDIA GeForce GTX 660 Rev. 2

VS

AMD Radeon HD 8970 OEM

NVIDIA GeForce GTX 660 Rev. 2

We compared two Desktop platform GPUs: 3GB VRAM Radeon HD 8970 OEM and 2GB VRAM GeForce GTX 660 Rev. 2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 8970 OEM 's Advantages

More VRAM (3GB vs 2GB)

Larger VRAM bandwidth (264.0GB/s vs 144.2GB/s)

1088 additional rendering cores

NVIDIA GeForce GTX 660 Rev. 2 's Advantages

Released 1 years and 8 months late

Boost Clock1032MHz

Lower TDP (140W vs 250W)

Score

Benchmark

FP32 (float)

Radeon HD 8970 OEM +91%

3.789 TFLOPS

GeForce GTX 660 Rev. 2

1.981 TFLOPS

Radeon HD 8970 OEM

VS

GeForce GTX 660 Rev. 2

Graphics Card

Jan 2013

Release Date

Sep 2014

Sea Islands

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

980 MHz

-

Boost Clock

1032 MHz

1375 MHz

Memory Clock

1502 MHz

Memory

3GB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

384bit

Memory Bus

192bit

264.0GB/s

Bandwidth

144.2GB/s

Render Config

32

Compute Units

-

2048

Shading Units

960

128

TMUs

80

32

ROPs

24

-

16 KB (per CU)

L1 Cache

16 KB (per SMX)

768 KB

L2 Cache

384 KB

-

Theoretical Performance

29.60 GPixel/s

Pixel Rate

20.64 GPixel/s

118.4 GTexel/s

Texture Rate

82.56 GTexel/s

-

3.789 TFLOPS

FP32 (float)

1.981 TFLOPS

947.2 GFLOPS

FP64 (double)

82.56 GFLOPS

Board Design

250W

TDP

140W

600 W

Suggested PSU

300 W

1x 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 Processor

Tahiti

GPU Name

GK104

Tahiti XT (215-0821060)

GPU Variant

-

GCN 1.0

Architecture

Kepler

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

4.313 billion

Transistors

3.54 billion

352 mm²

Die Size

294 mm²

Graphics Features

12 (11_1)

DirectX

12 (11_0)

4.6

OpenGL

4.6

1.2

OpenCL

3.0

1.2

Vulkan

1.1

-

CUDA

3.0

5.1

Shader Model

5.1

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