Prime95 blend (torture test) I usually run for 8-12 hours then with small FFT for couple of hours although LinX can do a better job with establishing the thermal characteristics of the CPU (some people prefer IBT or OCCT's Linpack test-both provide similar testing regimes).
I usually finish up a stability run with loading up Crysis-it has the ability to test the system as a whole rather than individual components.
200 quid on a LGA775 mobo ?
Unless you like the idea of the waterblock cooling for a Rampage Extreme or similar, then a lot of other cheaper boards provide the same (or better) connectivity, stability and overclocking ability (i.e. The Gigabyte -DS/-UD 3, 4, 5 series)
Good luck.
I looked at the rampage previously and it supports DDR3 RAM, i am trying to avoid buying parts uneccessarily since The last thing i want to do is end up replacing all the comp parts as i need previously -->
My Amd 3800+ went down few years ago, so i bought all new parts (except the PSU) as i decided to go back to Intel, When i booted the comp up it did not work, eventually i found that it was a faulty PSU lmaoo, so could have spent less that £100 on a PSU to get it running again.
I am thinking of getting the Asus Maximus II Formula LGA775, DDR2, Cfire, Snd, GBLan,ATX so this way i not need change the RAM, CPU.
Still searching for a better solution........But will definatley upgrade to i7 or higher where appropriate.
Currently memtest v4.00 has been running for 9 hours with no errors, i have left it running while i am at work, so the total run should be over 20 hours, will post the printscreen with the results so far.
Then tonight will run Prime95 for the same length with Everest to monitor the temps, i did run Prime for about an hour before i ran memtest and the temps according to Everest was about 46C.
I could mnot find the application for crysis-it, will continue my search. The question i have with running Crysis-it is will it record logs to say where the comp fails if it does before it reboots before going to the BSOD?
Kind regards