AMD Radeon HD 7970 vs NVIDIA GeForce GT 620 OEM

VS

AMD Radeon HD 7970

NVIDIA GeForce GT 620 OEM

We compared two Desktop platform GPUs: 3GB VRAM Radeon HD 7970 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 7970 's Advantages

More VRAM (3GB vs 512GB)

Larger VRAM bandwidth (264.0GB/s vs 14.37GB/s)

2000 additional rendering cores

NVIDIA GeForce GT 620 OEM 's Advantages

Lower TDP (30W vs 250W)

Score

Benchmark

FP32 (float)

Radeon HD 7970 +2328%

3.789 TFLOPS

GeForce GT 620 OEM

0.156 TFLOPS

Radeon HD 7970

VS

GeForce GT 620 OEM

Graphics Card

Dec 2011

Release Date

Apr 2012

Southern Islands

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1375 MHz

Memory Clock

898 MHz

Memory

3GB

Memory Size

512MB

GDDR5

Memory Type

DDR3

384bit

Memory Bus

64bit

264.0GB/s

Bandwidth

14.37GB/s

Render Config

32

Compute Units

-

SM Count

1

2048

Shading Units

48

128

TMUs

8

32

ROPs

4

-

16 KB (per CU)

L1 Cache

64 KB (per SM)

768 KB

L2 Cache

128 KB

-

Theoretical Performance

29.60 GPixel/s

Pixel Rate

1.620 GPixel/s

118.4 GTexel/s

Texture Rate

6.480 GTexel/s

-

3.789 TFLOPS

FP32 (float)

155.5 GFLOPS

947.2 GFLOPS

FP64 (double)

12.96 GFLOPS

Board Design

250W

TDP

30W

600 W

Suggested PSU

200 W

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

Outputs

1x DVI 1x HDMI 1.3a 1x VGA

1x 6-pin + 1x 8-pin

Power Connectors

None

Graphics Processor

Tahiti

GPU Name

GF119

Tahiti XT (215-0821060)

GPU Variant

-

GCN 1.0

Architecture

Fermi 2.0

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

4.313 billion

Transistors

0.292 billion

352 mm²

Die Size

79 mm²

Graphics Features

12 (11_1)

DirectX

12 (11_0)

4.6

OpenGL

4.6

1.2

OpenCL

1.1

1.2

Vulkan

N/A

-

CUDA

2.1

5.1

Shader Model

5.1

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