AMD Radeon HD 7870 XT vs NVIDIA GeForce GTX 660 OEM

VS

AMD Radeon HD 7870 XT

NVIDIA GeForce GTX 660 OEM

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 7870 XT 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 7870 XT 's Advantages

Boost Clock has increased by 10% (975MHz vs 888MHz)

More VRAM (2GB vs 1536GB)

Larger VRAM bandwidth (192.0GB/s vs 134.4GB/s)

384 additional rendering cores

NVIDIA GeForce GTX 660 OEM 's Advantages

Lower TDP (130W vs 185W)

Score

Benchmark

FP32 (float)

Radeon HD 7870 XT +46%

2.995 TFLOPS

GeForce GTX 660 OEM

2.046 TFLOPS

Radeon HD 7870 XT

VS

GeForce GTX 660 OEM

Graphics Card

Nov 2012

Release Date

Aug 2012

Southern Islands

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

925 MHz

Base Clock

823 MHz

975 MHz

Boost Clock

888 MHz

1500 MHz

Memory Clock

1400 MHz

Memory

2GB

Memory Size

1536MB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

192bit

192.0GB/s

Bandwidth

134.4GB/s

Render Config

24

Compute Units

-

1536

Shading Units

1152

96

TMUs

96

32

ROPs

24

-

16 KB (per CU)

L1 Cache

16 KB (per SMX)

512 KB

L2 Cache

384 KB

-

Theoretical Performance

31.20 GPixel/s

Pixel Rate

21.31 GPixel/s

93.60 GTexel/s

Texture Rate

85.25 GTexel/s

-

2.995 TFLOPS

FP32 (float)

2.046 TFLOPS

748.8 GFLOPS

FP64 (double)

85.25 GFLOPS

Board Design

185W

TDP

130W

450 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

2x 6-pin

Power Connectors

1x 6-pin

Graphics Processor

Tahiti

GPU Name

GK104

Tahiti LE (215-0821122)

GPU Variant

GK104-200-KD-A2

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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