AMD Radeon RX 6800 vs NVIDIA GeForce GTX 645 OEM

VS

AMD Radeon RX 6800 NVIDIA GeForce GTX 645 OEM

We compared two Desktop platform GPUs: 16GB VRAM Radeon RX 6800 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 6800 's Advantages

Released 7 years and 6 months late

Boost Clock2105MHz

More VRAM (16GB vs 1GB)

Larger VRAM bandwidth (512.0GB/s vs 64.00GB/s)

3264 additional rendering cores

NVIDIA GeForce GTX 645 OEM 's Advantages

Lower TDP (65W vs 250W)

Score

Benchmark

FP32 (float)

Radeon RX 6800 +1603%

16.17 TFLOPS

GeForce GTX 645 OEM

0.949 TFLOPS

Radeon RX 6800

VS

GeForce GTX 645 OEM

Graphics Card

Oct 2020

Release Date

Apr 2013

Navi II

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

1700 MHz

Base Clock

-

2105 MHz

Boost Clock

-

2000 MHz

Memory Clock

1000 MHz

Memory

16GB

Memory Size

1024MB

GDDR6

Memory Type

GDDR5

256bit

Memory Bus

128bit

512.0GB/s

Bandwidth

64.00GB/s

Render Config

-

SM Count

-

60

Compute Units

-

3840

Shading Units

576

240

TMUs

48

96

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

202.1 GPixel/s

Pixel Rate

9.888 GPixel/s

505.2 GTexel/s

Texture Rate

39.55 GTexel/s

32.33 TFLOPS

FP16 (half)

-

16.17 TFLOPS

FP32 (float)

949.2 GFLOPS

1010 GFLOPS

FP64 (double)

39.55 GFLOPS

Graphics Processor

Navi 21

GPU Name

GK106

Navi 21 XL (215-121000187)

GPU Variant

GK106-200-A1

RDNA 2.0

Architecture

Kepler

TSMC

Foundry

TSMC

7 nm

Process Size

28 nm

26.8 billion

Transistors

2.54 billion

520 mm²

Die Size

221 mm²

Board Design

250W

TDP

65W

600 W

Suggested PSU

250 W

1x HDMI 2.1 2x DisplayPort 1.4a 1x USB Type-C

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

2.1

OpenCL

3.0

1.3

Vulkan

1.1

-

CUDA

3.0

6.5

Shader Model

5.1

Related GPU Comparisons

1

AMD Radeon RX 6800 vs NVIDIA GeForce RTX 4070

2

AMD Radeon RX 7600 XT vs AMD Radeon RX 6800

3

AMD Radeon RX 7600 vs AMD Radeon RX 6800

4

AMD Radeon RX 6800 vs NVIDIA GeForce RTX 4060 Ti 8 GB

5

AMD Radeon RX 7800 XT vs AMD Radeon RX 6800

6

AMD Radeon RX 6800 vs AMD Radeon RX 6700 XT

7

AMD Radeon RX 6800 vs AMD Radeon HD 7570 OEM

8

AMD Radeon RX 6800 vs AMD Radeon HD 7870 XT

9

AMD Radeon RX 6800 vs NVIDIA GeForce GTX 750 GM206

10

AMD Radeon RX 6800 vs ATI Radeon HD 5730

Related News

1

AMD Ryzen 9000 DDR5 Memory Frequency Soars: Reaches 8000MHz with All Four Slots Occupied

2

Snapdragon 8 Gen 4 to Feature Frame Interpolation for GPU: A Game-Changing Experience

3

Intel Adds 5 New Device IDs to Latest Linux Xe Kernel in Preparation for Battlemage

4

Ryzen AI 9 365 Benchmark Results Leaked: Significant Improvements in Multi-Core and IPC Performance Over Previous Generation

5

Concerns Raised by Unstable 13th/14th Gen Core CPUs: Motherboard Manufacturers Worry About Impact on Arrow Lake Release and Sales

6

Do You Really Know What a "Rendering Engine" Is? Read This Article to Understand All About It

7

New AMD Zen5 Ryzen 9000 Motherboards X870E/X870 to Adopt USB4! But You’ll Have to Wait Two More Months

8

Surpassing RTX 2050! Intel's Next-Gen Integrated Graphics Benchmark Closely Approaches AMD

9

New Benchmarks for AMD Ryzen AI 9 HX 370 Revealed: Single-Core Parity with R9 7945HX3D, Multi-Core Still Lower

10

X3D Performance Beyond Words! AMD Ryzen 7 9700X May Unlock Power Consumption: From 65W to 120W