AMD Radeon HD 7870 XT vs NVIDIA GeForce GT 620

VS

AMD Radeon HD 7870 XT NVIDIA GeForce GT 620

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

Released 6 months late

Boost Clock975MHz

More VRAM (2GB vs 1GB)

Larger VRAM bandwidth (192.0GB/s vs 14.40GB/s)

1440 additional rendering cores

NVIDIA GeForce GT 620 's Advantages

Lower TDP (49W vs 185W)

Score

Benchmark

FP32 (float)

Radeon HD 7870 XT +1013%

2.995 TFLOPS

GeForce GT 620

0.269 TFLOPS

Radeon HD 7870 XT

VS

GeForce GT 620

Graphics Card

Nov 2012

Release Date

May 2012

Southern Islands

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

925 MHz

Base Clock

-

975 MHz

Boost Clock

-

1500 MHz

Memory Clock

900 MHz

Memory

2GB

Memory Size

1024MB

GDDR5

Memory Type

DDR3

256bit

Memory Bus

64bit

192.0GB/s

Bandwidth

14.40GB/s

Render Config

-

SM Count

2

24

Compute Units

-

1536

Shading Units

96

TMUs

16

32

ROPs

4

-

Tensor Cores

-

RT Cores

-

16 KB (per CU)

L1 Cache

64 KB (per SM)

512 KB

L2 Cache

128 KB

Theoretical Performance

31.20 GPixel/s

Pixel Rate

2.800 GPixel/s

93.60 GTexel/s

Texture Rate

11.20 GTexel/s

-

FP16 (half)

-

2.995 TFLOPS

FP32 (float)

268.8 GFLOPS

748.8 GFLOPS

FP64 (double)

22.40 GFLOPS

Graphics Processor

Tahiti

GPU Name

GF108

Tahiti LE (215-0821122)

GPU Variant

GF108-100-KB-A1

GCN 1.0

Architecture

Fermi

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

4.313 billion

Transistors

0.585 billion

352 mm²

Die Size

116 mm²

Board Design

185W

TDP

49W

450 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

2x 6-pin

Power Connectors

None

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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