NVIDIA GeForce GTX 660 Rev. 2 vs AMD Radeon RX 7990 XTX

VS

NVIDIA GeForce GTX 660 Rev. 2

AMD Radeon RX 7990 XTX

We compared two Desktop platform GPUs: 2GB VRAM GeForce GTX 660 Rev. 2 and 24GB VRAM Radeon RX 7990 XTX to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GTX 660 Rev. 2 's Advantages

Lower TDP (140W vs 405W)

AMD Radeon RX 7990 XTX 's Advantages

Boost Clock has increased by 249% (3599MHz vs 1032MHz)

More VRAM (24GB vs 2GB)

Larger VRAM bandwidth (1152GB/s vs 144.2GB/s)

5184 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce GTX 660 Rev. 2

1.981 TFLOPS

Radeon RX 7990 XTX +4364%

88.45 TFLOPS

GeForce GTX 660 Rev. 2

VS

Radeon RX 7990 XTX

Graphics Card

Sep 2014

Release Date

Unknown

GeForce 600

Generation

Navi III

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 4.0 x16

Clock Speeds

980 MHz

Base Clock

2500 MHz

1032 MHz

Boost Clock

3599 MHz

1502 MHz

Memory Clock

3000 MHz

Memory

2GB

Memory Size

24GB

GDDR5

Memory Type

GDDR6

192bit

Memory Bus

384bit

144.2GB/s

Bandwidth

1152GB/s

Render Config

-

Compute Units

96

-

960

Shading Units

6144

80

TMUs

384

24

ROPs

192

-

RT Cores

96

16 KB (per SMX)

L1 Cache

256 KB per Array

384 KB

L2 Cache

6 MB

-

L3 Cache

192 MB

Theoretical Performance

20.64 GPixel/s

Pixel Rate

691.0 GPixel/s

82.56 GTexel/s

Texture Rate

1382 GTexel/s

-

FP16 (half)

176.9 TFLOPS

1.981 TFLOPS

FP32 (float)

88.45 TFLOPS

82.56 GFLOPS

FP64 (double)

2.764 TFLOPS

Board Design

140W

TDP

405W

300 W

Suggested PSU

800 W

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

Outputs

1x HDMI 2.1a 2x DisplayPort 2.1 1x USB Type-C

1x 6-pin

Power Connectors

3x 8-pin

Graphics Processor

GK104

GPU Name

Navi 31

-

GPU Variant

Navi 31 XTX+

Kepler

Architecture

RDNA 3.0

TSMC

Foundry

TSMC

28 nm

Process Size

5 nm

3.54 billion

Transistors

57.7 billion

294 mm²

Die Size

529 mm²

Graphics Features

12 (11_0)

DirectX

12 Ultimate (12_2)

4.6

OpenGL

4.6

3.0

OpenCL

2.2

1.1

Vulkan

1.3

3.0

CUDA

-

5.1

Shader Model

6.7

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