Can i play red alert 3 on dell gx270

Well the minimum requirements for RA3 are:
OS – Windows XP / Vista (32-Bit)
Processor – XP: 2.0 GHz (Intel Pentium 4; AMD Athlon 2000+; Multiple Cores) / Vista: 2.2 GHz (Intel Pentium 4/AMD Athlon 2200+/Multiple Cores)
Memory – XP: 512 MB / Vista: 1 GB
Hard Drive – Media: 6.0 GB / EA Link: 12.0 GB
DVD Drive - 8x
Video Card – XP: 64 MB / Vista: 128 MB, GeForce 6800 or Radeon X1800 I think so.
Sound Card - DirectX 9.0c compatible
DirectX - Version 9.0c
Online Multiplayer – 512 Kbps or faster; 2-8 Players
Input - Keyboard, Mouse

Your Pentium 4 2.8GHz and memory size passes, but what AGP card do you have? To find out, Start Menu -> Run -> Type in dxdiag -> Select the 'Display' tab and in Device under Name, your graphics adapter should be displayed.