AMD Radeon R9 390 X2 vs NVIDIA GeForce GTX 645 OEM

VS

AMD Radeon R9 390 X2 NVIDIA GeForce GTX 645 OEM

We compared two Desktop platform GPUs: 8GB VRAM Radeon R9 390 X2 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 390 X2 's Advantages

Released 2 years and 5 months late

More VRAM (8GB vs 1GB)

Larger VRAM bandwidth (345.6GB/s vs 64.00GB/s)

1984 additional rendering cores

NVIDIA GeForce GTX 645 OEM 's Advantages

Lower TDP (65W vs 580W)

Score

Benchmark

FP32 (float)

Radeon R9 390 X2 +439%

5.12 TFLOPS

GeForce GTX 645 OEM

0.949 TFLOPS

Radeon R9 390 X2

VS

GeForce GTX 645 OEM

Graphics Card

Sep 2015

Release Date

Apr 2013

Pirate Islands

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

1350 MHz

Memory Clock

1000 MHz

Memory

8GB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

512bit

Memory Bus

128bit

345.6GB/s

Bandwidth

64.00GB/s

Render Config

-

SM Count

-

40

Compute Units

-

2560

Shading Units

576

160

TMUs

48

64

ROPs

16

-

Tensor Cores

-

RT Cores

-

16 KB (per CU)

L1 Cache

16 KB (per SMX)

1024 KB

L2 Cache

256 KB

Theoretical Performance

64.00 GPixel/s

Pixel Rate

9.888 GPixel/s

160.0 GTexel/s

Texture Rate

39.55 GTexel/s

-

FP16 (half)

-

5.120 TFLOPS

FP32 (float)

949.2 GFLOPS

640.0 GFLOPS

FP64 (double)

39.55 GFLOPS

Graphics Processor

Grenada

GPU Name

GK106

Grenada PRO (215-0880030)

GPU Variant

GK106-200-A1

GCN 2.0

Architecture

Kepler

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

6.2 billion

Transistors

2.54 billion

438 mm²

Die Size

221 mm²

Board Design

580W

TDP

65W

950 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

4x 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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