How can i make my computer run Pokemon Platinium Smoothly?

[Makorin]

I use DeSmuME 0.9.4 and it works perfectly for me
With Pokemon there are no Graphical Glitches just that DeSmuME glitches out when you do in-game trades

I have;
Windows Vista Home Premium
nvidia GeForce 8400 GS 512MB Graphics Card [a PCI Express]
Pentium Dual-Core CPU E5200 @ 2.5 GHz
3GB RAM

 

[Byte me]

most computers are too slow or old to run emulators well or effeciently

 

[Late]

I have No$Gba + No$Zoomer D/P/Pl works perfectly on my 7 and on my old XP. And I've seen that No$Gba works fine on Windows 98 too.
I don't know why everybody hates No$Gba (saying that it's too old to play newest games), well I have played every of my game perfectly (expect few problems with HG/SS but it's normal for every emulator).

 

[DJCherryTempo]

This is kinda not a Pokemon thing, but its emulation related:

My computer's stats are:
Intel(R)
Pentium(R) 4 CPU 1.60 GHz
1.59 GHz, 640 MB of RAM.

I understand its an old computer, but if I was to play Castlevania Portrait of Ruin on DesMuMe, what emulator things would I need to do to make it run smoothly?

 

[Ihtesam19]

Defragmenting it helps
_________________

 

[PuffyChain]

i play use NO$GBA 2.6a...
running well with 512MB RAM only...