New system not stable 3

[biosol]

Hello,
I've built my last 3 systems so I thought this latest would go smoothly like
the others, but the system first started to freeze when transfering several
GB of data to it (did that 3 times), gave me application errors in IE and F
irefox, and now is rebooting under load.

The system details:
MB = ECS PT800CE-A VIA 'prescott' ready based chipset
CPU = Intel 3.0E Ghz, 1mb cache, HT prescott I believe
RAM = 2x512 Cosari DDR400 for 1GB
Video = Radeon 9200SE 128MB based
Sound&NIC = onboard
H.D. = Seagate 120GB 7,200 RPM
CDRW = Sony

PSU = was the 300W that came with the case, just replaced with a Just PC 450
W

After watching about 45 minutes of a DivX movie the system has rebooted twic
e recently, once with the 300W PSU, once with the new 450W PSU. Both times
I have entered the BIOS to check the CPU temp. which was around 38-40c. So
I don't think it's a heat problem. The case temp was cooler, maybe because
I have 3 fans in the case.

Another odd thing is that I used this motherboard for about a month and a ha
lf in a different case with a Celeron D 2.66GHz and 512MB of Mushkin RAM. I
t worked fine.

Can someone help me out? I used the power calculator at

http://www.3dcool.com

and
it came up with 299W, and I'm planning on adding 4 firewire cards and a wire
less PCI card so I need to find out what's making it unstable. Any thoughts
?

Thanks,

 

[Taed]

Yay! ECS released BIOS revision 1.1e which did resolve my issue with incompatibility with my CPU model. While you two also have 3.0 GHz P4s, mine is a different CPUID and core E0, which the previous bioses apparently had an issue with.

FYI, there was someone on another thread somewhere that was having some memory issues, and the newer version of the BIOS did resolve those for them.