AMD Radeon RX 7800 vs NVIDIA GeForce GTX 645 OEM

VS

AMD Radeon RX 7800 NVIDIA GeForce GTX 645 OEM

We compared two Desktop platform GPUs: 16GB VRAM Radeon RX 7800 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 7800 's Advantages

Released 9 years and 9 months late

Boost Clock2800MHz

More VRAM (16GB vs 1GB)

Larger VRAM bandwidth (576.0GB/s vs 64.00GB/s)

3264 additional rendering cores

NVIDIA GeForce GTX 645 OEM 's Advantages

Lower TDP (65W vs 300W)

Score

Benchmark

FP32 (float)

Radeon RX 7800 +3832%

37.32 TFLOPS

GeForce GTX 645 OEM

0.949 TFLOPS

Radeon RX 7800

VS

GeForce GTX 645 OEM

Graphics Card

Jan 2023

Release Date

Apr 2013

Navi III

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

1800 MHz

Base Clock

-

2800 MHz

Boost Clock

-

2250 MHz

Memory Clock

1000 MHz

Memory

16GB

Memory Size

1024MB

GDDR6

Memory Type

GDDR5

256bit

Memory Bus

128bit

576.0GB/s

Bandwidth

64.00GB/s

Render Config

-

SM Count

-

60

Compute Units

-

3840

Shading Units

576

240

TMUs

48

128

ROPs

16

-

Tensor Cores

-

60

RT Cores

-

128 KB per Array

L1 Cache

16 KB (per SMX)

4 MB

L2 Cache

256 KB

Theoretical Performance

358.4 GPixel/s

Pixel Rate

9.888 GPixel/s

672.0 GTexel/s

Texture Rate

39.55 GTexel/s

86.02 TFLOPS

FP16 (half)

-

43.01 TFLOPS

FP32 (float)

949.2 GFLOPS

1344 GFLOPS

FP64 (double)

39.55 GFLOPS

Graphics Processor

Navi 32

GPU Name

GK106

Navi 32 XT

GPU Variant

GK106-200-A1

RDNA 3.0

Architecture

Kepler

TSMC

Foundry

TSMC

5 nm

Process Size

28 nm

Unknown

Transistors

2.54 billion

346 mm²

Die Size

221 mm²

Board Design

300W

TDP

65W

700 W

Suggested PSU

250 W

1x HDMI 2.1a 3x DisplayPort 2.1

Outputs

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

2x 8-pin

Power Connectors

None

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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