AMD Radeon HD 6790 vs NVIDIA GeForce GTX 660 OEM

VS

AMD Radeon HD 6790

NVIDIA GeForce GTX 660 OEM

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6790 and 1536MB VRAM GeForce GTX 660 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GTX 660 OEM 's Advantages

Released 1 years and 4 months late

Boost Clock888MHz

More VRAM (1536GB vs 1024GB)

352 additional rendering cores

Lower TDP (130W vs 150W)

Score

Benchmark

FP32 (float)

Radeon HD 6790

1.344 TFLOPS

GeForce GTX 660 OEM +52%

2.046 TFLOPS

Radeon HD 6790

VS

GeForce GTX 660 OEM

Graphics Card

Apr 2011

Release Date

Aug 2012

Northern Islands

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

823 MHz

-

Boost Clock

888 MHz

1050 MHz

Memory Clock

1400 MHz

Memory

1024MB

Memory Size

1536MB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

192bit

134.4GB/s

Bandwidth

134.4GB/s

Render Config

10

Compute Units

-

800

Shading Units

1152

40

TMUs

96

16

ROPs

24

-

8 KB (per CU)

L1 Cache

16 KB (per SMX)

512 KB

L2 Cache

384 KB

-

Theoretical Performance

13.44 GPixel/s

Pixel Rate

21.31 GPixel/s

33.60 GTexel/s

Texture Rate

85.25 GTexel/s

-

1344 GFLOPS

FP32 (float)

2.046 TFLOPS

-

FP64 (double)

85.25 GFLOPS

Board Design

150W

TDP

130W

450 W

Suggested PSU

300 W

2x DVI 1x HDMI 1.3a 1x DisplayPort 1.1

Outputs

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

2x 6-pin

Power Connectors

1x 6-pin

Graphics Processor

Barts

GPU Name

GK104

Barts LE (215-0798002)

GPU Variant

GK104-200-KD-A2

TeraScale 2

Architecture

Kepler

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

1.7 billion

Transistors

3.54 billion

255 mm²

Die Size

294 mm²

Graphics Features

11.2 (11_0)

DirectX

12 (11_0)

4.4

OpenGL

4.6

1.2

OpenCL

3.0

N/A

Vulkan

1.1

-

CUDA

3.0

5.0

Shader Model

5.1

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