ATI Radeon HD 4855 vs NVIDIA GeForce GT 420 OEM

VS

ATI Radeon HD 4855 NVIDIA GeForce GT 420 OEM

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 4855 and 1024MB VRAM GeForce GT 420 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Radeon HD 4855 's Advantages

Larger VRAM bandwidth (115.2GB/s vs 28.80GB/s)

592 additional rendering cores

NVIDIA GeForce GT 420 OEM 's Advantages

Released 8 months late

More VRAM (1024GB vs 512GB)

Lower TDP (50W vs 110W)

Score

Benchmark

FP32 (float)

Radeon HD 4855 +449%

0.736 TFLOPS

GeForce GT 420 OEM

0.134 TFLOPS

Radeon HD 4855

VS

GeForce GT 420 OEM

Graphics Card

Jan 2010

Release Date

Sep 2010

Radeon R700

Generation

GeForce 400

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

900 MHz

Memory Clock

900 MHz

Memory

512MB

Memory Size

1024MB

GDDR5

Memory Type

DDR3

256bit

Memory Bus

128bit

115.2GB/s

Bandwidth

28.80GB/s

Render Config

-

SM Count

1

8

Compute Units

-

640

Shading Units

48

32

TMUs

4

16

ROPs

4

-

Tensor Cores

-

RT Cores

-

16 KB (per CU)

L1 Cache

64 KB (per SM)

256 KB

L2 Cache

256 KB

Theoretical Performance

9.200 GPixel/s

Pixel Rate

1.400 GPixel/s

18.40 GTexel/s

Texture Rate

2.800 GTexel/s

-

FP16 (half)

-

736.0 GFLOPS

FP32 (float)

134.4 GFLOPS

147.2 GFLOPS

FP64 (double)

11.20 GFLOPS

Graphics Processor

RV770

GPU Name

GF108

RV770 PRO (215-0669065)

GPU Variant

GF108-200-A1

TeraScale

Architecture

Fermi

TSMC

Foundry

TSMC

55 nm

Process Size

40 nm

0.956 billion

Transistors

0.585 billion

256 mm²

Die Size

116 mm²

Board Design

110W

TDP

50W

300 W

Suggested PSU

250 W

1x DVI 1x HDMI 1.3a 1x VGA

Outputs

1x DVI 1x HDMI 1.3a 1x VGA

1x 6-pin

Power Connectors

None

Graphics Features

10.1 (10_1)

DirectX

12 (11_0)

3.3

OpenGL

4.6

1.1

OpenCL

1.1

N/A

Vulkan

N/A

-

CUDA

2.1

4.1

Shader Model

5.1

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