AMD Radeon R9 285X vs NVIDIA GeForce GTX 645 OEM

VS

AMD Radeon R9 285X NVIDIA GeForce GTX 645 OEM

We compared two Desktop platform GPUs: 3GB VRAM Radeon R9 285X and 1024MB VRAM GeForce GTX 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 1GB)

Larger VRAM bandwidth (264.0GB/s vs 64.00GB/s)

1472 additional rendering cores

NVIDIA GeForce GTX 645 OEM 's Advantages

Lower TDP (65W vs 200W)

Score

Benchmark

FP32 (float)

Radeon R9 285X +332%

4.104 TFLOPS

GeForce GTX 645 OEM

0.949 TFLOPS

Radeon R9 285X

VS

GeForce GTX 645 OEM

Graphics Card

Unknown

Release Date

Apr 2013

Volcanic Islands

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

1375 MHz

Memory Clock

1000 MHz

Memory

3GB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

384bit

Memory Bus

128bit

264.0GB/s

Bandwidth

64.00GB/s

Render Config

-

SM Count

-

32

Compute Units

-

2048

Shading Units

576

128

TMUs

48

32

ROPs

16

-

Tensor Cores

-

RT Cores

-

16 KB (per CU)

L1 Cache

16 KB (per SMX)

768 KB

L2 Cache

256 KB

Theoretical Performance

32.06 GPixel/s

Pixel Rate

9.888 GPixel/s

128.3 GTexel/s

Texture Rate

39.55 GTexel/s

-

FP16 (half)

-

4.104 TFLOPS

FP32 (float)

949.2 GFLOPS

-

FP64 (double)

39.55 GFLOPS

Graphics Processor

Tonga

GPU Name

GK106

Tonga XT (215-0851313)

GPU Variant

GK106-200-A1

GCN 3.0

Architecture

Kepler

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

5 billion

Transistors

2.54 billion

366 mm²

Die Size

221 mm²

Board Design

200W

TDP

65W

550 W

Suggested PSU

250 W

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

Outputs

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

1x 6-pin + 1x 8-pin

Power Connectors

None

Graphics Features

12 (12_0)

DirectX

12 (11_0)

4.6

OpenGL

4.6

2.0

OpenCL

3.0

1.2

Vulkan

1.1

-

CUDA

3.0

6.3

Shader Model

5.1

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