AMD Radeon HD 6850 X2 vs NVIDIA GeForce GT 620

VS

AMD Radeon HD 6850 X2

NVIDIA GeForce GT 620

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 6850 X2 and 1024MB VRAM GeForce GT 620 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6850 X2 's Advantages

More VRAM (2GB vs 1024GB)

Larger VRAM bandwidth (134.4GB/s vs 14.40GB/s)

864 additional rendering cores

NVIDIA GeForce GT 620 's Advantages

Released 8 months late

Lower TDP (49W vs 254W)

Score

Benchmark

FP32 (float)

Radeon HD 6850 X2 +471%

1.536 TFLOPS

GeForce GT 620

0.269 TFLOPS

Radeon HD 6850 X2

VS

GeForce GT 620

Graphics Card

Sep 2011

Release Date

May 2012

Northern Islands

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1050 MHz

Memory Clock

900 MHz

Memory

2GB

Memory Size

1024MB

GDDR5

Memory Type

DDR3

256bit

Memory Bus

64bit

134.4GB/s

Bandwidth

14.40GB/s

Render Config

12

Compute Units

-

SM Count

2

960

Shading Units

96

48

TMUs

16

32

ROPs

4

-

8 KB (per CU)

L1 Cache

64 KB (per SM)

512 KB

L2 Cache

128 KB

-

Theoretical Performance

25.60 GPixel/s

Pixel Rate

2.800 GPixel/s

38.40 GTexel/s

Texture Rate

11.20 GTexel/s

-

1.536 TFLOPS

FP32 (float)

268.8 GFLOPS

-

FP64 (double)

22.40 GFLOPS

Board Design

254W

TDP

49W

600 W

Suggested PSU

200 W

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

Outputs

1x DVI 1x HDMI 1.3a 1x VGA

2x 8-pin

Power Connectors

None

Graphics Processor

Barts

GPU Name

GF108

Barts PRO (215-0798006)

GPU Variant

GF108-100-KB-A1

TeraScale 2

Architecture

Fermi

TSMC

Foundry

TSMC

40 nm

Process Size

40 nm

1.7 billion

Transistors

0.585 billion

255 mm²

Die Size

116 mm²

Graphics Features

11.2 (11_0)

DirectX

12 (11_0)

4.4

OpenGL

4.6

1.2

OpenCL

1.1

N/A

Vulkan

N/A

-

CUDA

2.1

5.0

Shader Model

5.1

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