what is the most likely reason a system would not post this is back to my old problem i have put a new ram in so can exclude that i have just put re-seated the cpu and cleaned the heatsink base and added a new layer thermal compound which has stopped the system from shutting down so there must have been a issue there i have tried a different graphics card pulled from this system so what is left mobo and cpu ? i think my system does not have bios beeps that is why i do not recive them. but would not haveing a floppy in the drive be read first as its the first boot device i would have thought so but it does not so would this point more towards the mobo that the cpu ? i have fiited a empty but formatted hard drive but as the system does not post was unable to do much with that lol psu is 550watt replaced about 3 months ago and have run the system with just the harddrive connected the whole system is only just over 1 year old