Lag spikes in almost every game

[albertofan64]

So, I get LS (Lag spikes) in almost every game. (Minecraft, Roblox, DanceON, Unturned...) but do not get LS at games such as Terraria and Crashlands.
My PC specs are:
OS: Windows 7 Ultimate 32-bit SP1
CPU: AMD Athlon 64 X2 5200+ Windsor 90nm Technology
RAM: 3,00GB Single-channel DDR2 @ 373 MHz (6-6-6-18)
Mother board: ASUSTeK Computer INC. M2N-MX SE Plus (AM2)
Graphics: DELL 1703FP (1280x1024@60Hz) 256MB ATI 3DP (RADEON X700 SE) (GeCube/InfoTek) ATI 3DP (RADEON X700 SE Secondary) (GeCube/InfoTek) CrossFire Disabled
Storage: 74GB Seagate ST380021A ATA Device (ATA)
Optical Drives: TSSTcorp CDDVDW SH-S223Q SCSI CdRom Device

The LS problem started before two months or so. Then, (2 months ago) we re-installed the OS, (which is Windows 7), changed the power unit and changed the hard drive. It did not lagged at all. I didn't even notice it because I did not play that much games, and when I did notice it, I tried to remove it, but with no use. It is really annoying and I would be thankful if anyone could help me. Thanks in advance good people!

 

[mdd1963]

First, see if your single player performance (i.e, offline) perfomrance is ok....

you can't necessarily condemn a system for lagging out on the internet...

cranking out consistent 100fps updates over a slow 128Kbps ISDN line to a slow/overworked server 'somewhere on the internet' can be problematic.....

 

[albertofan64]

Nope, my single player performance is not OK, nor on the online. But as I mentioned the games like Crashlands, Terraria and Pink Panther - Pinkadelic Pursuit are alright. And those don't have any multiplayer sections (you can not play online in any of them).