AMD Radeon RX 7900 XTX vs NVIDIA GeForce GTX 645 OEM

VS

AMD Radeon RX 7900 XTX

NVIDIA GeForce GTX 645 OEM

We compared two Desktop platform GPUs: 24GB VRAM Radeon RX 7900 XTX 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 RX 7900 XTX 's Advantages

Released 9 years and 7 months late

Boost Clock2498MHz

More VRAM (24GB vs 1024GB)

Larger VRAM bandwidth (960.0GB/s vs 64.00GB/s)

5568 additional rendering cores

NVIDIA GeForce GTX 645 OEM 's Advantages

Lower TDP (65W vs 355W)

Score

Benchmark

FP32 (float)

Radeon RX 7900 XTX +6368%

61.39 TFLOPS

GeForce GTX 645 OEM

0.949 TFLOPS

Radeon RX 7900 XTX

VS

GeForce GTX 645 OEM

Graphics Card

Nov 2022

Release Date

Apr 2013

Navi III

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

1929 MHz

Base Clock

-

2498 MHz

Boost Clock

-

2500 MHz

Memory Clock

1000 MHz

Memory

24GB

Memory Size

1024MB

GDDR6

Memory Type

GDDR5

384bit

Memory Bus

128bit

960.0GB/s

Bandwidth

64.00GB/s

Render Config

96

Compute Units

-

6144

Shading Units

576

384

TMUs

48

192

ROPs

16

-

96

RT Cores

-

256 KB per Array

L1 Cache

16 KB (per SMX)

6 MB

L2 Cache

256 KB

96 MB

L3 Cache

-

Theoretical Performance

479.6 GPixel/s

Pixel Rate

9.888 GPixel/s

959.2 GTexel/s

Texture Rate

39.55 GTexel/s

122.8 TFLOPS

FP16 (half)

-

61.39 TFLOPS

FP32 (float)

949.2 GFLOPS

1.918 TFLOPS

FP64 (double)

39.55 GFLOPS

Board Design

355W

TDP

65W

750 W

Suggested PSU

250 W

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

Outputs

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

2x 8-pin

Power Connectors

None

Graphics Processor

Navi 31

GPU Name

GK106

Navi 31 XTX (215-145000146)

GPU Variant

GK106-200-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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