NVIDIA GeForce GTX 645 OEM vs AMD Radeon RX 7900 XT

VS

NVIDIA GeForce GTX 645 OEM

AMD Radeon RX 7900 XT

We compared two Desktop platform GPUs: 1024MB VRAM GeForce GTX 645 OEM and 20GB VRAM Radeon RX 7900 XT to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GTX 645 OEM 's Advantages

Lower TDP (65W vs 300W)

AMD Radeon RX 7900 XT 's Advantages

Released 9 years and 7 months late

Boost Clock2394MHz

More VRAM (20GB vs 1024GB)

Larger VRAM bandwidth (800.0GB/s vs 64.00GB/s)

4800 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce GTX 645 OEM

0.949 TFLOPS

Radeon RX 7900 XT +5324%

51.48 TFLOPS

GeForce GTX 645 OEM

VS

Radeon RX 7900 XT

Graphics Card

Apr 2013

Release Date

Nov 2022

GeForce 600

Generation

Navi III

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 4.0 x16

Clock Speeds

-

Base Clock

1387 MHz

-

Boost Clock

2394 MHz

1000 MHz

Memory Clock

2500 MHz

Memory

1024MB

Memory Size

20GB

GDDR5

Memory Type

GDDR6

128bit

Memory Bus

320bit

64.00GB/s

Bandwidth

800.0GB/s

Render Config

-

Compute Units

84

-

576

Shading Units

5376

48

TMUs

336

16

ROPs

192

-

RT Cores

84

16 KB (per SMX)

L1 Cache

256 KB per Array

256 KB

L2 Cache

6 MB

-

L3 Cache

80 MB

Theoretical Performance

9.888 GPixel/s

Pixel Rate

459.6 GPixel/s

39.55 GTexel/s

Texture Rate

804.4 GTexel/s

-

FP16 (half)

103.0 TFLOPS

949.2 GFLOPS

FP32 (float)

51.48 TFLOPS

39.55 GFLOPS

FP64 (double)

1.609 TFLOPS

Board Design

65W

TDP

300W

250 W

Suggested PSU

700 W

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

Outputs

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

None

Power Connectors

2x 8-pin

Graphics Processor

GK106

GPU Name

Navi 31

GK106-200-A1

GPU Variant

Navi 31 XT (215-145000156)

Kepler

Architecture

RDNA 3.0

TSMC

Foundry

TSMC

28 nm

Process Size

5 nm

2.54 billion

Transistors

57.7 billion

221 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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