LGA775 bus speeds too high ??

That's probably because of the hyper-threading, some games do have problems when it's enabled; try to disable it in the bios.

The P4 LGA775 is very gamer friendly. Give us some more detailed specs of the machine. RAM type, speed and everything else. That will help narrow it down some more. Also, are you overclocking?

Just to try and give more info , no overclocking on any of the pcs'.
The ram is the same for all the computers, vga adapters fx5200 and x700
tried on all machines.hdd s , and game versions for both games r the same on all.
operating systems , both win2k and winxp used on all, however with win2k for example
yuris' won't play at all since there is no (that I know of) "right-click= emulate"
function ? as in winxp.(see 1st post on this)
I am using standard mobo drivers from the mobo disk, and use identical drivers when
using the agp cards.I use 1024x768 on all the machines.

The pcs' that yuris' and need for speed2 don't work on

P4 socket775 2,8ghz , asrock mobo 800mhz bus,256mb legend DDR400mhz ram,
fx5200 (or onboard sis661fx)(or x700 )

P4 socket775 3ghz , ecs mobo 800mhz bus,512mb legend DDR400mhz ram,
fx5200 (or onboard sis661fx)(or x700 )


and now the pcs' that yuris' and need for speed2 work on

AMD socket754 (sold now) 3000+ , MSI mobo 800mhz bus,512mb legend DDR400mhz ram,
fx5200 (or x700 )

P4 socket478 2.4ghz , ecs mobo 533mhz bus,256mb legend DDR400mhz ram,
fx5200 (or onboard intel 82845)(or x700 )

As u can see pretty standardised stuff , since I run my own small pc biz from home,
I have access to quite a bit of hardware, and have interchanged as much of it to try and
troubleshoot this problem (without success).My limited experience tells me it isn't any
of the following...os , vga card , ram , powersupply , game version (patches) ,
screen resolution or drivers. however I stand to be shown the way here :-)
I must say these 2 games r the only ones I have found so far that don't work on my LGA s'
then again I don't play all that many games anyhow :-(
....cs,generals,yuris,need4speed,farcry,snood (lol), will be trying much more when I get
my new rig x2 4200,xfx 7800gt. bundled with moto gp, x2 reunion,something else I 4get.

What about Direct X 9.0c? Make sure it is installed. And let me tell you, Don't spend all that money on a 4200+. Quad Cores are gonna be out real soon. Besides, you should see this Pentium D 805 compared to my X2 4400+. Trust me, don't waste your money on the AMD this go round anyhow. Save it for Conroe or Quads.

There are some patches I saw for need for speed 2 you might need. Can't remember where, but do a Google search with the game names and look around for bug fixes and patches. I had some of the same problems but it was mostly dual core related, where I had to shut one core off for older games.

Another thing to do is actually call the game manufacturer. Activision or whoever. They may know something that you need.
Hope it works out for you.

"My limited experience tells me it isn't any
of the following...os , vga card , ram , powersupply , game version (patches) ,
screen resolution or drivers. "

You mentioned in another post that you used the drivers from the mainboard CD....

These will nearly always be several versions/months old....