AMD Radeon RX 7990 XTX vs NVIDIA GeForce GTX 660

VS

AMD Radeon RX 7990 XTX

NVIDIA GeForce GTX 660

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

Main Differences

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

NVIDIA GeForce GTX 660 's Advantages

Lower TDP (140W vs 405W)

Score

Benchmark

FP32 (float)

Radeon RX 7990 XTX +4364%

88.45 TFLOPS

GeForce GTX 660

1.981 TFLOPS

Radeon RX 7990 XTX

VS

GeForce GTX 660

Graphics Card

Unknown

Release Date

Sep 2012

Navi III

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

2500 MHz

Base Clock

980 MHz

3599 MHz

Boost Clock

1032 MHz

3000 MHz

Memory Clock

1502 MHz

Memory

24GB

Memory Size

2GB

GDDR6

Memory Type

GDDR5

384bit

Memory Bus

192bit

1152GB/s

Bandwidth

144.2GB/s

Render Config

96

Compute Units

-

6144

Shading Units

960

384

TMUs

80

192

ROPs

24

-

96

RT Cores

-

256 KB per Array

L1 Cache

16 KB (per SMX)

6 MB

L2 Cache

384 KB

192 MB

L3 Cache

-

Theoretical Performance

691.0 GPixel/s

Pixel Rate

20.64 GPixel/s

1382 GTexel/s

Texture Rate

82.56 GTexel/s

176.9 TFLOPS

FP16 (half)

-

88.45 TFLOPS

FP32 (float)

1.981 TFLOPS

2.764 TFLOPS

FP64 (double)

82.56 GFLOPS

Board Design

405W

TDP

140W

800 W

Suggested PSU

300 W

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

Outputs

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

3x 8-pin

Power Connectors

1x 6-pin

Graphics Processor

Navi 31

GPU Name

GK106

Navi 31 XTX+

GPU Variant

GK106-400-A1

RDNA 3.0

Architecture

Kepler

TSMC

Foundry

TSMC

5 nm

Process Size

28 nm

57.7 billion

Transistors

2.54 billion

529 mm²

Die Size

221 mm²

Graphics Features

12 Ultimate (12_2)

DirectX

12 (11_0)

4.6

OpenGL

4.6

2.2

OpenCL

3.0

1.3

Vulkan

1.1

-

CUDA

3.0

6.7

Shader Model

5.1

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