DRAMA DRAMA DRAMA EVERYWHERE 

 grand theft auto vice city multiplayer requires a gpu ?
A very easy method you should follow reinstall your windows and yeah there is a administrator running behind which is called task manager there you can set up all your tasks your pc does.( most of the people use antiviruses on slower processors  which are the actual reason that ruin up your pc performance be ware about that.)

since pentium D is slow comparing to todays modern softwares but it is enough to run vice city just look after the tasks your pc is already running when your windows start which im afraid you dont even know they are taking place( discord , your antiviruses ,torrent , your skype and many other things start when you turn on the pc and they have high impact on performance mostly people dont really think about that and they complain why they get microstutters and lag on there pc). Most of the roleplay games or open world games are actually based on CPU since vice city graphics are of 90's so dont worry about the gpu mate .

for Video display use lower resolution like 1024 x 786 and yeah i will recommend that upgrade your ram a little bit more (4 to 6 GB )and you will find a smooth running vice city.
cut it dont buy anything look after for your tasks because im sure your pc is working more on them than your games.

nice person good luck mate.

An artist , please create one signature for me too

kind person.

no any personal conflicts with you mate but yeah the attitude you got due to few skills i had the same once i newly joined this game and believe me i've payed alot for it consider it as a friendly advise

Good luck PAL , Cheers .

hope you find a good spot to land this time.
good day senior.