New power supply now slow boot and operation

I just installed a new power supply in my P4 300 mhz computer. I went from a 450 watt to a 430 watt which shouldn't be a problem. Now my boot takes several minutes and access time seems to be really slow. I ran a virus scan on my system and it took about two hours which isn't typical. I am running XP professional and was not having any problems before the old power supply failed. Any help would be appreciated.

 

There is no such thing. The slowest P4 was 1.3 GHz.

Tell us more about the rest of your hardware. Also, exactly what model is that new PSU? Without that, it's hard to tell whether a 430 W PSU is OK for your system, but my hunch is a good quality 430W unit should work fine for your system. I have a 400W PSU in my computer with an Athlon XP 2200 (1.8 GHz), 512MB RAM, CDRW drive, DVD drive, hard drive, sound card, nVidia Geforce FX5500 256MB video card, and NIC card in a PCI slot.

 

Sorry about the mistake it is a 3.0 processor. The new power supply is a thermaltake TR2-430W; I have an Asus motherboard with Intel pentium 4 processor, 2 gig RAM, DVDRW, hard drive, sound card, ATI video card, and Ethernet card in a PCI slot.

 

Is there any possibility that the hard drive is going bad? There are a lot of freeware software tools that can test the state of your hard drive. Another thing I would try (just for diagnosis purposes) is to download and run a Linux Live CD. This will boot your computer without using the hard drive at all. If this works fine it is a good possibility the drive is bad.

 

I would suspect RAM before HD. UBCD has memtest & memtest+ as well as some other hardware diagnostics on it. Good luck!

 

I agree, I was thinking after I posted about the HD that there is a good possibility of some kind of ESD damage during the power supply change, or components that were damaged because of the faulty power supply. I would definitely run memtest.