Before I pay for ISBoxer...question time?

[bigboybetty]

Ok, so I am wanting to multi box again, I used to tri-box ages ago and it was lots of fun but PC has changed since then and I'm wondering whether my current PC would be able to handle 3-4 clients (leveling from 1-60 for now).

I really want to 5 box but PC isn't good enough for that (yet). I'll be looking to get a new gfx card soon if I can't run 3-4.

So, before I buy ISBoxer and find out my PC is too shit for me to box properly...here are my specs (please be kind enough to tell me if I will fail epically).

EDIT:
Intel Core2 Duo E7300 2.66GHz = Intel Core 2 Quad Q8400 2.66GHz
4gb DD3 RAM
Win7 Ultimate 32bit
ATI Radeon HD 3850 = Geforce GTX 275

Yay upgrade.
Also I have a laptop I can use, maybe run my slaves on my desktop pc and my main on my laptop? or visa versa. Laptop specs are:

Intel pentium T4400 2.2GHz 800mhz fsb
4gb RAM
ATI Radeon HD Mobility 5470
Win7 Home Premium 64bit

(also I dunno whether this is the right forum to post in?)