NVIDIA GeForce GTX 780 Ti vs ATI Radeon HD 4855

VS

NVIDIA GeForce GTX 780 Ti

ATI Radeon HD 4855

We compared two Desktop platform GPUs: 3GB VRAM GeForce GTX 780 Ti and 512MB VRAM Radeon HD 4855 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GTX 780 Ti 's Advantages

Released 3 years and 10 months late

Boost Clock928MHz

More VRAM (3GB vs 512GB)

Larger VRAM bandwidth (336.6GB/s vs 115.2GB/s)

2240 additional rendering cores

ATI Radeon HD 4855 's Advantages

Lower TDP (110W vs 250W)

Score

Benchmark

FP32 (float)

GeForce GTX 780 Ti +626%

5.345 TFLOPS

Radeon HD 4855

0.736 TFLOPS

GeForce GTX 780 Ti

VS

Radeon HD 4855

Graphics Card

Nov 2013

Release Date

Jan 2010

GeForce 700

Generation

Radeon R700

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

875 MHz

Base Clock

-

928 MHz

Boost Clock

-

1753 MHz

Memory Clock

900 MHz

Memory

3GB

Memory Size

512MB

GDDR5

Memory Type

GDDR5

384bit

Memory Bus

256bit

336.6GB/s

Bandwidth

115.2GB/s

Render Config

-

Compute Units

8

-

2880

Shading Units

640

240

TMUs

32

48

ROPs

16

-

16 KB (per SMX)

L1 Cache

16 KB (per CU)

1536 KB

L2 Cache

256 KB

-

Theoretical Performance

55.68 GPixel/s

Pixel Rate

9.200 GPixel/s

222.7 GTexel/s

Texture Rate

18.40 GTexel/s

-

5.345 TFLOPS

FP32 (float)

736.0 GFLOPS

222.7 GFLOPS

FP64 (double)

147.2 GFLOPS

Board Design

250W

TDP

110W

600 W

Suggested PSU

300 W

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

Outputs

1x DVI 1x HDMI 1.3a 1x VGA

1x 6-pin + 1x 8-pin

Power Connectors

1x 6-pin

Graphics Processor

GK110B

GPU Name

RV770

GK110-425-B1

GPU Variant

RV770 PRO (215-0669065)

Kepler

Architecture

TeraScale

TSMC

Foundry

TSMC

28 nm

Process Size

55 nm

7.08 billion

Transistors

0.956 billion

561 mm²

Die Size

256 mm²

Graphics Features

12 (11_1)

DirectX

10.1 (10_1)

4.6

OpenGL

3.3

3.0

OpenCL

1.1

Vulkan

N/A

3.5

CUDA

-

5.1

Shader Model

4.1

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