Kernel.org: 3.3.7, 
sid (unstable): 3.2.18-1
wheezy (testing): 3.2.17-1
kmuto bpo d-i: 
squeeze-bpo: 3.2.15-1~bpo60+1
squeeze (stable): 2.6.32-45
lenny (oldstable): 

Debian GNU/Linux device driver check & report

DELL: Dimmension 4550

PCI IDWorks?VendorDeviceDriverKernel
80862560YesIntel Corporation82845G/GL[Brookdale-G]/GE/PE DRAM Controller/Host-Hub Interfaceintel-agp
80862561Intel Corporation82845G/GL[Brookdale-G]/GE/PE Host-to-AGP Bridge
808624c2YesIntel Corporation82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #1usb-uhci,uhci-hcd
808624c4YesIntel Corporation82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #2usb-uhci,uhci-hcd
808624c7YesIntel Corporation82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #3usb-uhci,uhci-hcd
808624cdYesIntel Corporation82801DB/DBM (ICH4/ICH4-M) USB2 EHCI Controllerehci-hcd
8086244eYesIntel Corporation82801 PCI Bridgei810_rng
808624c0YesIntel Corporation82801DB/DBL (ICH4/ICH4-L) LPC Interface Bridgeintel-rng,iTCO_wdtv2.6.25-
808624cbYesIntel Corporation82801DB (ICH4) IDE Controllerata_piixv2.6.25-
808624c3YesIntel Corporation82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) SMBus Controlleri2c-i801v2.6.25-
808624c5YesIntel Corporation82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) AC'97 Audio Controllersnd-intel8x0v2.6.25-
10de0172YesnVidia CorporationNV17 [GeForce4 MX 420]nv
14f12016Conexant Systems, Inc.HSF 56k Data/Fax/Voice/Spkp Modem
80861039YesIntel Corporation82801DB PRO/100 VE (LOM) Ethernet Controllere100v2.6.25-

Dog slow, something nasty in the memory heirarchy.
Don't buy Dell if you can avoid it!