ATI Radeon HD 4770 vs NVIDIA GeForce GTX 645 OEM

VS

ATI Radeon HD 4770

NVIDIA GeForce GTX 645 OEM

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 4770 and 1024MB VRAM GeForce GTX 645 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Radeon HD 4770 's Advantages

64 additional rendering cores

NVIDIA GeForce GTX 645 OEM 's Advantages

Released 4 years late

More VRAM (1024GB vs 512GB)

Larger VRAM bandwidth (64.00GB/s vs 51.20GB/s)

Lower TDP (65W vs 80W)

Score

Benchmark

FP32 (float)

Radeon HD 4770 +1%

0.96 TFLOPS

GeForce GTX 645 OEM

0.949 TFLOPS

Radeon HD 4770

VS

GeForce GTX 645 OEM

Graphics Card

Apr 2009

Release Date

Apr 2013

Radeon R700

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

800 MHz

Memory Clock

1000 MHz

Memory

512MB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

128bit

Memory Bus

128bit

51.20GB/s

Bandwidth

64.00GB/s

Render Config

8

Compute Units

-

640

Shading Units

576

32

TMUs

48

16

ROPs

16

-

16 KB (per CU)

L1 Cache

16 KB (per SMX)

128 KB

L2 Cache

256 KB

-

Theoretical Performance

12.00 GPixel/s

Pixel Rate

9.888 GPixel/s

24.00 GTexel/s

Texture Rate

39.55 GTexel/s

-

960.0 GFLOPS

FP32 (float)

949.2 GFLOPS

192.0 GFLOPS

FP64 (double)

39.55 GFLOPS

Board Design

80W

TDP

65W

250 W

Suggested PSU

250 W

2x DVI 1x S-Video

Outputs

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

1x 6-pin

Power Connectors

None

Graphics Processor

RV740

GPU Name

GK106

RV740 XT (215-0727019)

GPU Variant

GK106-200-A1

TeraScale

Architecture

Kepler

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

0.826 billion

Transistors

2.54 billion

137 mm²

Die Size

221 mm²

Graphics Features

10.1 (10_1)

DirectX

12 (11_0)

3.3

OpenGL

4.6

1.1

OpenCL

3.0

N/A

Vulkan

1.1

-

CUDA

3.0

4.1

Shader Model

5.1

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