From what John Carmack has said the minimum
specification for running DOOM 3 will be a:
1000Mhz Athlon/Pentium CPU.
256MB of RAM
GeForce 1 / Radeon 7xxx level of graphics card.
Average spec based on some estimates (not
1400Mhz Athlon / 1800Mhz Pentium 4 or higher speed CPU.
256MB of RAM + again quite dependant on how memory hungry your OS is.
GeForce 3 (original or Ti 500).
Current (June/July 2003) high-end systems
should be kicking ass:
Athlon XP 3200+ 3.06Ghz Pentium 4
512MB of RAM
Radeon 9800 Pro or GeForce 5900 Ultra
showing the kind of performance and we're talking 'good' performance from these
kinds of systems, so hi-end today can manage DOOM ok with full on detail and
1024x768 resolution and higher.
We've got a lot of discussion going on in the
system requirements, so might be interesting to see what other people are
'speculating' in regards to higher up then just the minimum hardware