AMD Radeon R9 255 OEM vs NVIDIA GeForce GTX 660 OEM

VS

AMD Radeon R9 255 OEM NVIDIA GeForce GTX 660 OEM

We compared two Desktop platform GPUs: 2GB VRAM Radeon R9 255 OEM 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 R9 255 OEM 's Advantages

Released 1 years and 4 months late

Boost Clock has increased by 5% (930MHz vs 888MHz)

More VRAM (2GB vs 1GB)

Lower TDP (65W vs 130W)

NVIDIA GeForce GTX 660 OEM 's Advantages

Larger VRAM bandwidth (134.4GB/s vs 73.60GB/s)

640 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon R9 255 OEM

0.952 TFLOPS

GeForce GTX 660 OEM +114%

2.046 TFLOPS

Radeon R9 255 OEM

VS

GeForce GTX 660 OEM

Graphics Card

Dec 2013

Release Date

Aug 2012

Volcanic Islands

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

900 MHz

Base Clock

823 MHz

930 MHz

Boost Clock

888 MHz

1150 MHz

Memory Clock

1400 MHz

Memory

2GB

Memory Size

1536MB

GDDR5

Memory Type

GDDR5

128bit

Memory Bus

192bit

73.60GB/s

Bandwidth

134.4GB/s

Render Config

-

SM Count

-

8

Compute Units

-

512

Shading Units

1152

32

TMUs

96

16

ROPs

24

-

Tensor Cores

-

RT Cores

-

16 KB (per CU)

L1 Cache

16 KB (per SMX)

256 KB

L2 Cache

384 KB

Theoretical Performance

14.88 GPixel/s

Pixel Rate

21.31 GPixel/s

29.76 GTexel/s

Texture Rate

85.25 GTexel/s

-

FP16 (half)

-

952.3 GFLOPS

FP32 (float)

2.046 TFLOPS

59.52 GFLOPS

FP64 (double)

85.25 GFLOPS

Graphics Processor

Cape Verde

GPU Name

GK104

Cape Verde PRX

GPU Variant

GK104-200-KD-A2

GCN 1.0

Architecture

Kepler

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

1.5 billion

Transistors

3.54 billion

123 mm²

Die Size

294 mm²

Board Design

65W

TDP

130W

250 W

Suggested PSU

300 W

No outputs

Outputs

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

1x 6-pin

Power Connectors

1x 6-pin

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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