NVIDIA GeForce GTX 660 OEM vs AMD Radeon HD 7950 Mac Edition

VS

NVIDIA GeForce GTX 660 OEM AMD Radeon HD 7950 Mac Edition

We compared two Desktop platform GPUs: 1536MB VRAM GeForce GTX 660 OEM and 3GB VRAM Radeon HD 7950 Mac Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GTX 660 OEM 's Advantages

Boost Clock888MHz

Lower TDP (130W vs 200W)

AMD Radeon HD 7950 Mac Edition 's Advantages

Released 7 months late

More VRAM (3GB vs 1GB)

Larger VRAM bandwidth (240.0GB/s vs 134.4GB/s)

640 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce GTX 660 OEM

2.046 TFLOPS

Radeon HD 7950 Mac Edition +40%

2.867 TFLOPS

GeForce GTX 660 OEM

VS

Radeon HD 7950 Mac Edition

Graphics Card

Aug 2012

Release Date

Mar 2013

GeForce 600

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

823 MHz

Base Clock

-

888 MHz

Boost Clock

-

1400 MHz

Memory Clock

1250 MHz

Memory

1536MB

Memory Size

3GB

GDDR5

Memory Type

GDDR5

192bit

Memory Bus

384bit

134.4GB/s

Bandwidth

240.0GB/s

Render Config

-

SM Count

-

Compute Units

28

1152

Shading Units

1792

96

TMUs

112

24

ROPs

32

-

Tensor Cores

-

RT Cores

-

16 KB (per SMX)

L1 Cache

16 KB (per CU)

384 KB

L2 Cache

768 KB

Theoretical Performance

21.31 GPixel/s

Pixel Rate

25.60 GPixel/s

85.25 GTexel/s

Texture Rate

89.60 GTexel/s

-

FP16 (half)

-

2.046 TFLOPS

FP32 (float)

2.867 TFLOPS

85.25 GFLOPS

FP64 (double)

716.8 GFLOPS

Graphics Processor

GK104

GPU Name

Tahiti

GK104-200-KD-A2

GPU Variant

Tahiti PRO (215-0821056)

Kepler

Architecture

GCN 1.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

3.54 billion

Transistors

4.313 billion

294 mm²

Die Size

352 mm²

Board Design

130W

TDP

200W

300 W

Suggested PSU

550 W

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

Outputs

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

1x 6-pin

Power Connectors

2x 6-pin

Graphics Features

12 (11_0)

DirectX

12 (11_1)

4.6

OpenGL

4.6

3.0

OpenCL

1.2

1.1

Vulkan

1.2

3.0

CUDA

-

5.1

Shader Model

5.1

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