AMD Radeon HD 6870 X2 vs NVIDIA GeForce GT 620 OEM

VS

AMD Radeon HD 6870 X2

NVIDIA GeForce GT 620 OEM

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6870 X2 and 512MB VRAM GeForce GT 620 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6870 X2 's Advantages

More VRAM (1024GB vs 512GB)

Larger VRAM bandwidth (134.4GB/s vs 14.37GB/s)

1072 additional rendering cores

NVIDIA GeForce GT 620 OEM 's Advantages

Released 9 months late

Lower TDP (30W vs 300W)

Score

Benchmark

FP32 (float)

Radeon HD 6870 X2 +1192%

2.016 TFLOPS

GeForce GT 620 OEM

0.156 TFLOPS

Radeon HD 6870 X2

VS

GeForce GT 620 OEM

Graphics Card

Jul 2011

Release Date

Apr 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

898 MHz

Memory

1024MB

Memory Size

512MB

GDDR5

Memory Type

DDR3

256bit

Memory Bus

64bit

134.4GB/s

Bandwidth

14.37GB/s

Render Config

14

Compute Units

-

SM Count

1

1120

Shading Units

48

56

TMUs

8

32

ROPs

4

-

8 KB (per CU)

L1 Cache

64 KB (per SM)

512 KB

L2 Cache

128 KB

-

Theoretical Performance

28.80 GPixel/s

Pixel Rate

1.620 GPixel/s

50.40 GTexel/s

Texture Rate

6.480 GTexel/s

-

2.016 TFLOPS

FP32 (float)

155.5 GFLOPS

-

FP64 (double)

12.96 GFLOPS

Board Design

300W

TDP

30W

700 W

Suggested PSU

200 W

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

Outputs

1x DVI 1x HDMI 1.3a 1x VGA

-

Power Connectors

None

Graphics Processor

Barts

GPU Name

GF119

Barts XT (215-0798000)

GPU Variant

-

TeraScale 2

Architecture

Fermi 2.0

TSMC

Foundry

TSMC

40 nm

Process Size

40 nm

1.7 billion

Transistors

0.292 billion

255 mm²

Die Size

79 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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