NVIDIA GeForce RTX 4080 12 GB vs NVIDIA GeForce GTX 645 OEM

VS

NVIDIA GeForce RTX 4080 12 GB NVIDIA GeForce GTX 645 OEM

We compared two Desktop platform GPUs: 12GB VRAM GeForce RTX 4080 12 GB and 1024MB VRAM GeForce GTX 645 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce RTX 4080 12 GB 's Advantages

Boost Clock2610MHz

More VRAM (12GB vs 1GB)

Larger VRAM bandwidth (504.2GB/s vs 64.00GB/s)

7104 additional rendering cores

NVIDIA GeForce GTX 645 OEM 's Advantages

Lower TDP (65W vs 285W)

Score

Benchmark

FP32 (float)

GeForce RTX 4080 12 GB +4124%

40.09 TFLOPS

GeForce GTX 645 OEM

0.949 TFLOPS

GeForce RTX 4080 12 GB

VS

GeForce GTX 645 OEM

Graphics Card

Unknown

Release Date

Apr 2013

GeForce 40

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

2310 MHz

Base Clock

-

2610 MHz

Boost Clock

-

1313 MHz

Memory Clock

1000 MHz

Memory

12GB

Memory Size

1024MB

GDDR6X

Memory Type

GDDR5

192bit

Memory Bus

128bit

504.2GB/s

Bandwidth

64.00GB/s

Render Config

60

SM Count

-

Compute Units

-

7680

Shading Units

576

240

TMUs

48

80

ROPs

16

240

Tensor Cores

-

60

RT Cores

-

128 KB (per SM)

L1 Cache

16 KB (per SMX)

48 MB

L2 Cache

256 KB

Theoretical Performance

208.8 GPixel/s

Pixel Rate

9.888 GPixel/s

626.4 GTexel/s

Texture Rate

39.55 GTexel/s

40.09 TFLOPS

FP16 (half)

-

40.09 TFLOPS

FP32 (float)

949.2 GFLOPS

626.4 GFLOPS

FP64 (double)

39.55 GFLOPS

Graphics Processor

AD104

GPU Name

GK106

AD104-400-A1

GPU Variant

GK106-200-A1

Ada Lovelace

Architecture

Kepler

TSMC

Foundry

TSMC

4 nm

Process Size

28 nm

35.8 billion

Transistors

2.54 billion

295 mm²

Die Size

221 mm²

Board Design

285W

TDP

65W

600 W

Suggested PSU

250 W

1x HDMI 2.1 3x DisplayPort 1.4a

Outputs

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

1x 16-pin

Power Connectors

None

Graphics Features

12 Ultimate (12_2)

DirectX

12 (11_0)

4.6

OpenGL

4.6

3.0

OpenCL

3.0

1.3

Vulkan

1.1

8.9

CUDA

3.0

6.6

Shader Model

5.1

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