AMD Radeon R9 390 vs NVIDIA GeForce GTX 660 Ti

VS

AMD Radeon R9 390 NVIDIA GeForce GTX 660 Ti

We compared two Desktop platform GPUs: 8GB VRAM Radeon R9 390 and 2GB VRAM GeForce GTX 660 Ti to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 390 's Advantages

Released 2 years and 10 months late

More VRAM (8GB vs 2GB)

Larger VRAM bandwidth (384.0GB/s vs 144.2GB/s)

1216 additional rendering cores

NVIDIA GeForce GTX 660 Ti 's Advantages

Boost Clock980MHz

Lower TDP (150W vs 275W)

Score

Benchmark

FP32 (float)

Radeon R9 390 +94%

5.12 TFLOPS

GeForce GTX 660 Ti

2.634 TFLOPS

3DMark Time Spy

Radeon R9 390 +143%

3955

GeForce GTX 660 Ti

1627

Radeon R9 390

VS

GeForce GTX 660 Ti

Graphics Card

Jun 2015

Release Date

Aug 2012

Pirate Islands

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

915 MHz

-

Boost Clock

980 MHz

1500 MHz

Memory Clock

1502 MHz

Memory

8GB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

512bit

Memory Bus

192bit

384.0GB/s

Bandwidth

144.2GB/s

Render Config

-

SM Count

-

40

Compute Units

-

2560

Shading Units

1344

160

TMUs

112

64

ROPs

24

-

Tensor Cores

-

RT Cores

-

16 KB (per CU)

L1 Cache

16 KB (per SMX)

1024 KB

L2 Cache

384 KB

Theoretical Performance

64.00 GPixel/s

Pixel Rate

27.44 GPixel/s

160.0 GTexel/s

Texture Rate

109.8 GTexel/s

-

FP16 (half)

-

5.120 TFLOPS

FP32 (float)

2.634 TFLOPS

640.0 GFLOPS

FP64 (double)

109.8 GFLOPS

Graphics Processor

Grenada

GPU Name

GK104

Grenada PRO (215-0880030)

GPU Variant

GK104-300-KD-A2

GCN 2.0

Architecture

Kepler

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

6.2 billion

Transistors

3.54 billion

438 mm²

Die Size

294 mm²

Board Design

275W

TDP

150W

600 W

Suggested PSU

450 W

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

Outputs

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

1x 6-pin + 1x 8-pin

Power Connectors

2x 6-pin

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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