Advice for computer OS or other upgrades?

[zerocelsius]

Hello everyone. First time posting here. I'm currently running a:

Dell Dimension 3100
Windows XP SP3
Intel Pentium 4 2.8GHz Processor (Socket 775 LGA)
Dell 0JC474 Motherboard
500 GB HD
1GB Memory in the form of 2x 512MB DDR2 (PC2-4300) Memory Sticks
ATI Radeon HD 4300/4500 Series
Intel PRO/100 VE Network Card (Integrated)

My issue is... I'm having trouble running my games. Stuff like World of Warcraft and whatnot runs fine, but I'm Beta testing RIFT and trying to play a few other games, and I'm getting large amounts of lag. Are there any suggestions as to how I can make this PC better? I'm really good at building computers and identifying parts, as I've been dismantling and building them since I was a kid. But I wanted more expert opinion on this.

If I posted this in the wrong place, I do apologize. Please advise how I may fix this if this is the case.

I posted this in the wrong area. Please delete.

 

[iPwn]

Looks like you would benefit from a processor and RAM upgrade. (assuming I found the correct sys requirements)

Source: System Requirements - Rift: Planes of Telara Wiki

Processor: Newegg.com - Intel Core 2 Duo E8500 Wolfdale 3.16GHz 6MB L2 Cache LGA 775 65W Dual-Core Processor BX80570E8500

I wasn't able to determine the number of pins that your ram has, although I did find a link that stated it was 240 Pin but don't want to make a recommendation on what to buy based on internet wisdom.

 

[sahabcse]

You need to upgrade the processor, memory and graphics.