N64 games have horrible resolution, tried to change setting, now lagging like crazy

[Abyss_Walker]

Hello, my N64 games all looked super pixelated. You couldn't read any of the text.

So I went into the quick menu. I found the setting to change the resolution, so I changed the 4:3 resolution from 320x240 to 1920x1440, but the game's video and audio lagged like crazy. So I set everything back to 320x240, but all N64 games are still lagging. Here is a short clip to show what I am talking about:

https://imgur.com/gallery/DjnIduo

Below are some of my settings/specs. I would appreciate any help!

Retroarch - build date Feb. 3 2019
Core: Mupen64Plus OpenGL 2.5
CPU Core: dynamic_recompiler
RSP Mode: HLE
4:3 resolution: 1920x1440
16:9 Resolution: 1920x1080
Aspect ratio: 4:3
Bilinear filtering mode: standard

Windows 10 64 bit
Motherboard: Z270x-Gaming K7
CPU: Intel Core i7-7700K CPU@4.20 GHz
Ram: 16 GB
GPU: Nvidia 1070

[LeCharles]

Maybe try a different RPD?

[Abyss_Walker]

whats an RPD and how do I change it

[LeCharles]

Should be right there in the options menu.

[TehSpoopyKitteh]

You’ll need to set the render resolution in the game’s configuration options.