I'm new to this forum, I didn't even know it existed until today
I have a question regarding a component that I would like to replace. I have a graphics card which has gone kaput, not the proper technical term i know
and I would like to be able to fix it.I have identified what the cause of the failure is, it's an N-Channel enhancement mode mosfet (took some googling to find that out) which I believe is part of the power supply circuit for the GPU. Now, i'm aware that it is entirely possible that when this component failed it took the GPU and maybe some other components with it, maybe the card will never work again, but if I can find a replacement then it would be nice to try.
The component is a dpak surface mount device with the markings "ME60N03", after a bit of research I found that this is a 30V 75W N-Channel Enhancement mode MOSFET.
I have found a supplier online that will sell a replacement one for 89p, the problem is that it will cost me £12 P+P! To be honest that's pretty steep for something that i'm not even sure will work!
So, not wanting to give up, I dragged out every single circuit board I have and scoured them all for a suitable replacement, the only thing I have found so far (Istill have things to take apart yet XD) is this...
D20NE03L 30V 50W N-Channel Enhancement mode MOSFET Made by sgs thomson.
So, it is the right component, sort of, but the power dissipation is 25W short of what I need
What i'd like to know is, given that the component in question seems to have partially melted (the case is distorted) does anyone think it's a good idea for me to try using a replacement that is rated for less power dissipation? (the card was second hand and I suspect that a botched overclocking/overvolting attempt was the cause of the failure) Could I possibly use the replacement I have and fit a whacking great heatsink to it to stop it burning out? or is there any way I could chain two of these together to do the same job? (I have four available) I'm prepared to mod the card as much as I need to, but I want it to be safe before I test it out, the only PC I have with a PCI express slot is my main machine (my pride and joy) and the last thing i'd want to do is to fry my motherboard!
I'm not exactly a beginner at this, but it has been over a decade since A-Level electronics so feel free to be as technical or as simplistic as you feel is necessary with me
Any help or advice would be greatly appreciated, even if it's along the lines of "no, just bin it"
I'm going to go back to breaking perfectly serviceable equipment in the name of mosfet hunting now and i'll check back on this thread later this evening
Great forum you have here by the way
Regards,
Stewart.