I recently upgraded my motherboard, cpu, memory, and graphics card. Now I have a Celeron D 335 2.8Ghz cpu, 512 MB PC3200 RAM, and GeForce MX4000 128 MB graphics card. I tried running need for speed underground 1, but it still lags. Does anybody know what is keeping my computer from running need for speed underground smoothly?

I'd wait for a more technical persons answer, but I imagine its the Celeron D thats holding you back. I currently have that processor right now but will be switching to an amd 3000+. I know that intel processors alone are not tuned for gaming and celeron D is about the worst they come, especially 335's. If its not the slowest incarnation then its very close. I just have to wonder with upgrading the motherboard did you buy the processor with it or transfer it? if you upgraded to that then you unfortunately went with about the worst upgrade processor. Others will probably also tell you to upgrade to 1 gig of ram and if I'm not mistaken is the mx4000 old? I think I might have the wrong card in mind. Otherwise I'd recomend the obvious things like having no other programs running in the backround, lowering the screen resolution and tinkering with the graphic options in game since you seem to more than meet the minimum game requirements. MINIMUM SYSTEM REQUIREMENTS =========================== Windows 98, 98 Second Edition, ME, 2000 Professional, XP Professional, or XP Home operating system Intel Pentium III (or compatible) CPU running at 700Mhz or higher 32MB DirectX 9 compatible video card (Geforce2 or higher) using a supported chipset (see below) 128MB of RAM (256 MB using Windows 2000 or XP) DirectX compatible sound card Hard Drive Space: 450 MB free Hard Disk space, plus space for Direct X9 installation. Sound: DirectX compatible Sound Card8X CD-ROM Windows Xp Home Celeron 2.8 Ghz 768mb Ram Geforce 5700LE PCI Card 128MB 128 bit

did you update drivers www.nvidia.com and maybe lower resolution and eyecandy in the nfsu options i was able to run the game pretty good with high settings with this rig p4 2.0 ghz 512 2100 ram PCI Geforce-4 64 MB the 2.8 celeron is good enough for that particular game

I'm no expert on hardware but I think doug_brit is right about the Celeron D processor holding you back. My old and ancient computer, by today's standards (800 mhz Intel Pentium 3 512 RAM) ran nfs underground with a Radeon 9200se 64mb very smoothly. 1.8 GHz Intel Pentium 4 1.0 GHz RAM Gigabyte Motherboard Windows XP Pro SP2 Radeon 9550 256 mb AGP Sound Blaster Live 5.1

Hi the 2.8 celeron d shouldnt be the problem , check the fsb is correct for the ram & timings are correct for ddr333, the issue here imo is the mx400 & dx9 :( in the mean time try switching off unecessary services in xp like antivirus defrag the drive , reduce onscreen effects play in 800 x 600 screen res , regards

the processor is fine, get a better video card. nnidia fx 5500 works fine on NFS. if you can afford, get fx5700 or higher. the video card is pretty bad man, i had that before. P4 3.2GHZ kingstone 1GB DDR 3200 ABIT AS8 mobo Nvidia geforce 6800 128mb Soundblaster 24-bit audigy 2 520W PSU

Yes..the video card is your issue..i think the mx's will FOREVER hold you back.....