AMD Radeon HD 7850 vs NVIDIA GeForce GT 420 OEM

VS

AMD Radeon HD 7850

NVIDIA GeForce GT 420 OEM

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 7850 and 1024MB VRAM GeForce GT 420 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 7850 's Advantages

Released 1 years and 6 months late

More VRAM (2GB vs 1024GB)

Larger VRAM bandwidth (153.6GB/s vs 28.80GB/s)

976 additional rendering cores

NVIDIA GeForce GT 420 OEM 's Advantages

Lower TDP (50W vs 130W)

Score

Benchmark

FP32 (float)

Radeon HD 7850 +1214%

1.761 TFLOPS

GeForce GT 420 OEM

0.134 TFLOPS

Radeon HD 7850

VS

GeForce GT 420 OEM

Graphics Card

Mar 2012

Release Date

Sep 2010

Southern Islands

Generation

GeForce 400

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1200 MHz

Memory Clock

900 MHz

Memory

2GB

Memory Size

1024MB

GDDR5

Memory Type

DDR3

256bit

Memory Bus

128bit

153.6GB/s

Bandwidth

28.80GB/s

Render Config

16

Compute Units

-

SM Count

1

1024

Shading Units

48

64

TMUs

4

32

ROPs

4

-

16 KB (per CU)

L1 Cache

64 KB (per SM)

512 KB

L2 Cache

256 KB

-

Theoretical Performance

27.52 GPixel/s

Pixel Rate

1.400 GPixel/s

55.04 GTexel/s

Texture Rate

2.800 GTexel/s

-

1.761 TFLOPS

FP32 (float)

134.4 GFLOPS

110.1 GFLOPS

FP64 (double)

11.20 GFLOPS

Board Design

130W

TDP

50W

300 W

Suggested PSU

250 W

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

Outputs

1x DVI 1x HDMI 1.3a 1x VGA

1x 6-pin

Power Connectors

None

Graphics Processor

Pitcairn

GPU Name

GF108

Pitcairn PRO (215-0828062)

GPU Variant

GF108-200-A1

GCN 1.0

Architecture

Fermi

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

2.8 billion

Transistors

0.585 billion

212 mm²

Die Size

116 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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