64 X2 4200 vs C2D or 64 X2 5600

[Ness]

Heya folks, at the moment I have a laptop that is almost on par with desktop PC;
On my laptop is a C2D T5270 clocked at 1.4ghz with a 2MB L2 cache, with 2gb of 667mhz ddr2 ram and an nVidia 256mb 8600M GT.
On my desktop is an Athlon 64 x2 4200 clocked at 2.3ghz, with what i think is a 1mb L2 cache, 4x 512mb of 667mhz ddr2 ram, and an nVidia 256mb 8600 GTS.

However, when playing WoW, Need for Speed Pro Street or Crysis, i've noticed a significant rise in FPS in all 3 games when playing them on my laptop, despite it having a slower cpu. Is it because of the cache? Or is it because it's a C2D? I was wondering what the performance increase would be on my desktop if i changed from a 64 X2 4200 1mb L2 cache, to a 64 x2 5600 with a 2MB L2 Cache, and how it would perform compared with a C2D equivalent?
Basically, i want to stick with my AMD CPUs rather than switch over to a 775 mobo, as I don't want to spend any benjamins on a new motherboard, seeing as my current motherboard is pretty kickass.

 

[Ness]

After reading reviews of the Black Edition and stuff, think i'm gonna upgrade to one after all.

Also gonna take advantage of OCUK's current Geil 2x1gb PC6400 ultra low latency 800mhz RAM offer.

Mame, I'm running WoW on my laptop at 1280x960 and on my PC at 1280x1024.
ProStreet on my laptop and PC at 1024x768
Crysis on both at 1024x768. And I didn't know these kinds of performance PCs had any other use except for for games

Ninja2000, im currently downloading 3dmark05, although i don't really understand the scores and stuff...

Trunks, yeah, may be so. I'm using 4 sticks of 512 geil ram because i started off with 2 sticks, then decided i wanted to up my system to 2gb of ram, and bought another 2 sticks of the same ram.

But yeah, gonna order the following tomorow after checking the 3dmark stuff

http://www.overclockers.co.uk/showproduct.php?prodid=MY-058-GL
http://www.overclockers.co.uk/showproduct.php?prodid=CP-198-AM
http://www.overclockers.co.uk/showproduct.php?prodid=FG-000-AR

 

[Ness]

PC Score http://service.futuremark.com/home.action;jsessionid=CCF75C91EEA9C56608A7E5161155EEFD
Laptop Score http://service.futuremark.com/home.action;jsessionid=992B9F20B15619903EE7D32D426AC724

both with 3d mark 06.
What's causing the sluggishness on my PC then?
and on a further note, gonna love my RAM setup as it is, and just get the Black Edition 5000+ i think
on a second further note, my gpu on the laptop is 512mb, not 256

 

[Ness]

If i remember correctly, laptop score was about 2258 and my pc score was about 5370 or something. Either way the laptop score was considerably lower than my desktop score =/