AMD Radeon HD 7950 Monica BIOS 2 vs NVIDIA GeForce GTX 660

VS

AMD Radeon HD 7950 Monica BIOS 2

NVIDIA GeForce GTX 660

We compared two Desktop platform GPUs: 3GB VRAM Radeon HD 7950 Monica BIOS 2 and 2GB VRAM GeForce GTX 660 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 7950 Monica BIOS 2 's Advantages

More VRAM (3GB vs 2GB)

Larger VRAM bandwidth (240.0GB/s vs 144.2GB/s)

Lower TDP (85W vs 140W)

NVIDIA GeForce GTX 660 's Advantages

Released 8 months late

Boost Clock1032MHz

192 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 7950 Monica BIOS 2

1.229 TFLOPS

GeForce GTX 660 +61%

1.981 TFLOPS

Radeon HD 7950 Monica BIOS 2

VS

GeForce GTX 660

Graphics Card

Jan 2012

Release Date

Sep 2012

Southern 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

1250 MHz

Memory Clock

1502 MHz

Memory

3GB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

384bit

Memory Bus

192bit

240.0GB/s

Bandwidth

144.2GB/s

Render Config

12

Compute Units

-

768

Shading Units

960

48

TMUs

80

32

ROPs

24

-

16 KB (per CU)

L1 Cache

16 KB (per SMX)

768 KB

L2 Cache

384 KB

-

Theoretical Performance

25.60 GPixel/s

Pixel Rate

20.64 GPixel/s

38.40 GTexel/s

Texture Rate

82.56 GTexel/s

-

1229 GFLOPS

FP32 (float)

1.981 TFLOPS

307.2 GFLOPS

FP64 (double)

82.56 GFLOPS

Board Design

85W

TDP

140W

250 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

GK106

Tahiti PRO (215-0821056)

GPU Variant

GK106-400-A1

GCN 1.0

Architecture

Kepler

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

4.313 billion

Transistors

2.54 billion

352 mm²

Die Size

221 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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