NVIDIA GeForce GT 645 OEM vs AMD Radeon R9 280X2

VS

NVIDIA GeForce GT 645 OEM

AMD Radeon R9 280X2

We compared two Desktop platform GPUs: 1024MB VRAM GeForce GT 645 OEM and 3GB VRAM Radeon R9 280X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GT 645 OEM 's Advantages

Lower TDP (102W vs 375W)

AMD Radeon R9 280X2 's Advantages

Boost Clock1000MHz

More VRAM (3GB vs 1024GB)

Larger VRAM bandwidth (288.0GB/s vs 91.87GB/s)

1760 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce GT 645 OEM

0.894 TFLOPS

Radeon R9 280X2 +358%

4.096 TFLOPS

GeForce GT 645 OEM

VS

Radeon R9 280X2

Graphics Card

Apr 2012

Release Date

Unknown

GeForce 600

Generation

Volcanic Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

950 MHz

-

Boost Clock

1000 MHz

957 MHz

Memory Clock

1500 MHz

Memory

1024MB

Memory Size

3GB

GDDR5

Memory Type

GDDR5

192bit

Memory Bus

384bit

91.87GB/s

Bandwidth

288.0GB/s

Render Config

-

Compute Units

32

6

SM Count

-

288

Shading Units

2048

48

TMUs

128

24

ROPs

32

-

64 KB (per SM)

L1 Cache

16 KB (per CU)

384 KB

L2 Cache

768 KB

-

Theoretical Performance

9.312 GPixel/s

Pixel Rate

32.00 GPixel/s

37.25 GTexel/s

Texture Rate

128.0 GTexel/s

-

894.0 GFLOPS

FP32 (float)

4.096 TFLOPS

74.50 GFLOPS

FP64 (double)

1024 GFLOPS

Board Design

102W

TDP

375W

300 W

Suggested PSU

750 W

2x DVI 1x mini-HDMI 1.3a

Outputs

6x mini-DisplayPort 1.2

-

Power Connectors

3x 8-pin

Graphics Processor

GF114

GPU Name

Tahiti

-

GPU Variant

Tahiti XTL (215-0821065)

Fermi 2.0

Architecture

GCN 1.0

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

1.95 billion

Transistors

4.313 billion

332 mm²

Die Size

352 mm²

Graphics Features

12 (11_0)

DirectX

12 (11_1)

4.6

OpenGL

4.6

1.1

OpenCL

1.2

N/A

Vulkan

1.2

2.1

CUDA

-

5.1

Shader Model

5.1

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