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If this is not the right place to post this, I'm sorry, but I decided to put it here considering that I haven't the faintest idea of what the problem could be.

Here's the thing: I have a new computer with the following specs:
* SO: Windows 8.1 x64
* Processor: Intel Core i5-4210U CPU @ 1.7GHz (dual core)
* RAM: 8GB DDR3
* Video Card: nVIDIA GeForce 820M

When I first ran PCSX2 on it (ver. 1.2.1), I followed some performance config guides and managed to have it run smoothly here. But some time later, I picked it up again, and it started chugging in speed. Contextualizing: at first, I could have a near-perfect emulation of Guitar Hero II, very nearly at 60fps. But now, even the menus run at 30fps.

What could be the cause? Is it memory? A bad combination of settings? Outdated drivers? Outdated version of the emulator?

Thanks in advance for any helpful answer.

is your laptop set to high performance and plugged in?

Laptops normally have some sort of power-saver mode that when enabled makes games run much worse, that could be it?
You should also see if anything is using the CPU while PCSX2 isn't running. Even web browsers like firefox can eat a good chunk of your cpu sometimes.
If your Hard drive is really full that might cause some issues too (always keep at least a few gb free).

(04-01-2015, 12:44 AM)AndyKusanagi Wrote: [ -> ]If this is not the right place to post this, I'm sorry, but I decided to put it here considering that I haven't the faintest idea of what the problem could be.

Here's the thing: I have a new computer with the following specs:
* SO: Windows 8.1 x64
* Processor: Intel Core i5-4210U CPU @ 1.7GHz (dual core)
* RAM: 8GB DDR3
* Video Card: nVIDIA GeForce 820M

When I first ran PCSX2 on it (ver. 1.2.1), I followed some performance config guides and managed to have it run smoothly here. But some time later, I picked it up again, and it started chugging in speed. Contextualizing: at first, I could have a near-perfect emulation of Guitar Hero II, very nearly at 60fps. But now, even the menus run at 30fps.

What could be the cause? Is it memory? A bad combination of settings? Outdated drivers? Outdated version of the emulator?

Thanks in advance for any helpful answer.

It is probably your settings. For example the first time maybe you were running it at native resolution, and now you have it at 4x native. Or perhaps you are forgetting a speed hack that you had enabled the first time. Close as many background programs as possible just in case. Also, I would not suggest using emulators as a reference for testing your PC performance.

Could try the latest GIT build: http://buildbot.orphis.net/pcsx2/

Frankly, I think the laptop could be overheating and clocking down to cool off

provide the EE and GS values during slowdowns and also make sure to use the default settings.