AMD Radeon R9 285X vs NVIDIA GeForce GT 645 OEM

VS

AMD Radeon R9 285X

NVIDIA GeForce GT 645 OEM

We compared two Desktop platform GPUs: 3GB VRAM Radeon R9 285X and 1024MB VRAM GeForce GT 645 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 285X 's Advantages

More VRAM (3GB vs 1024GB)

Larger VRAM bandwidth (264.0GB/s vs 91.87GB/s)

1760 additional rendering cores

NVIDIA GeForce GT 645 OEM 's Advantages

Lower TDP (102W vs 200W)

Score

Benchmark

FP32 (float)

Radeon R9 285X +359%

4.104 TFLOPS

GeForce GT 645 OEM

0.894 TFLOPS

Radeon R9 285X

VS

GeForce GT 645 OEM

Graphics Card

Unknown

Release Date

Apr 2012

Volcanic Islands

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1375 MHz

Memory Clock

957 MHz

Memory

3GB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

384bit

Memory Bus

192bit

264.0GB/s

Bandwidth

91.87GB/s

Render Config

32

Compute Units

-

SM Count

6

2048

Shading Units

288

128

TMUs

48

32

ROPs

24

-

16 KB (per CU)

L1 Cache

64 KB (per SM)

768 KB

L2 Cache

384 KB

-

Theoretical Performance

32.06 GPixel/s

Pixel Rate

9.312 GPixel/s

128.3 GTexel/s

Texture Rate

37.25 GTexel/s

-

4.104 TFLOPS

FP32 (float)

894.0 GFLOPS

-

FP64 (double)

74.50 GFLOPS

Board Design

200W

TDP

102W

550 W

Suggested PSU

300 W

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

Outputs

2x DVI 1x mini-HDMI 1.3a

1x 6-pin + 1x 8-pin

Power Connectors

-

Graphics Processor

Tonga

GPU Name

GF114

Tonga XT (215-0851313)

GPU Variant

-

GCN 3.0

Architecture

Fermi 2.0

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

5 billion

Transistors

1.95 billion

366 mm²

Die Size

332 mm²

Graphics Features

12 (12_0)

DirectX

12 (11_0)

4.6

OpenGL

4.6

2.0

OpenCL

1.1

1.2

Vulkan

N/A

-

CUDA

2.1

6.3

Shader Model

5.1

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