TDP of motherboard and CPU

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aliensoldier105
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Hi I've recently begun a PC build with the Asus M5A78L-M LX motherboard and AMD Phenom II x4 965 processor, the box the motherboard it came in stated it supported AMD Phenom II 6 core processors, the highest end black edition one having a TDP of 140 watts so at first I assumed you could use any AMD Phenom II processor, but here's the thing, even after a BIOS update I keep getting this error saying my CPU model isn't supported

I looked it up on the Asus website and the list of supported processors were no higher than a 95w TDP, this I find is ridiculous, how could they mislead people by saying their motherboard is AM3+ and Phenom II x6 compatible but not state the thermal design power limitation on the box itself?

Obviously I have to replace the motherboard with a beefier one and reinstall the operating system, but would my CPU be damaged now that I've used the machine to install windows? if so, what other components are at risk? Please don't tell me it has impacted the other parts in some way unless it's the truth, I better not have to replace everything in the system, I hate having to start from scratch, especially over a mistake that wasn't my fault. However the good thing is, it hasn't crashed yet or overheated, the stock fan ran quiet the whole time and the CPU hasn't been OC'd or overvolted. any thoughts would be appreciated, thanks.

spawnkiller
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Yeah, this board seems to be limited at 95w as it's wrtitten on the specsheet and the 965be is 140w i believe (correct me if i'm wrong) so the power design isn't strong enough to power that CPU... I don't think you need to replace anything else than the mobo as it post no problem and see that this cpu isn't supported so the bios recognize and should protect itself (at least i think)

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aliensoldier105
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well the motherboard is also stated to have an anti surge specification. so you could be right, it might be built to protect the other hardware even in the case of running an unsupported CPU model which would explain why the BIOS posts and proceeds to boot after pressing the f1 key, but I wanted to ask just to make sure I don't end up spending more money than necessary to correct the problem. and the 965be is a 125w, it definitely isn't safe to continue using the board with that chip.

spawnkiller
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As you pull 45w more at full load (if not overclock cause that can go higher to) on a board designed for 95w max, it's definitely not safe as the mobo VRM (voltage regulator) is always at max load and from my experience, that's not a good thing to do

had a Q6600 on a p5qpl and the VRM burn out in like 5-6 months, that cost me new ram, new video card and new mobo and i was lucky that the CPU survive to this... in my case the PSU triggered the protect but 1/4sec too late when my mobo was burning some capacitor and the house breaker goes out just 1 sec after... that's the last time i've ever bought a cheap PSU and a cheap motherboard too...

aliensoldier105
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Well I only used the system for an hour at most while installing windows 7 home premium and the updates with it, did nothing intensive and it has been left powered off ever since sitting in my room. So what you're saying is, I still have time to put this right and that nothing is damaged yet?

spawnkiller
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I guess yes, but don't take the risk to use it now cause it would for sure fail eventually like today or in 2 years, only god knows...

aliensoldier105
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Indeed, however I'm not using a generic PSU, it's a corsair cx500. I'm guessing that would of saved my other parts from getting affected by the TDP mismatch of the board and CPU. Thanks anyway, I'll get version 2 of that motherboard I mentioned as that one supports the Phenom 965 black edition.

This shouldn't of happened and I was a bit angry at Asus over this as I spent money on a board that was supposed to be Phenom II compatible, it is but not fully, they stated the limitations on their website but that's not good enough, what about people who have not yet got a PC and are building one just so they can get on the internet? for all we know, Asus hiding an important piece of information like that could of ended up costing somebody who is a general consumer a lot of money. I think in future they should specify TDP limits on their boards on the boxes they come in, it would save us all time.

spawnkiller
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ASUS cheap board is really cheap as my last ASUS board was that p5qpl, i'll never buy a cheap asus motherboard again as my p43 gigabyte is better for the same price and have voltage option to overclock and better VRM (4 years for now still running 4.05ghz with 1.625V on Vcore and 4 ram sticks from last year to now when the p5qpl was 1.45V vcore (maxed out settings) and only 3.4ghz and 2 sticks of ram just died a couple of months after the initial setup...

aliensoldier105
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Well that is one of the reasons I tend to not set voltages outside of their specified defaults in the BIOS. on my gigabyte motherboard/i7 pc i set my ram to standard instead of the default turbo mode and it caused blue screens to come about very often. fortunately no permanent damage was done. at first I thought I had faulty ram modules because I was getting errors with memtest at the time, now I get no errors at all. I had a Killer NIC k1 network card go faulty on me though which caused my PC to keep locking up at the desktop on startup. now I use an Intel 1000/gt pro but in future I'm considering to just stick with onboard gigabit LAN.

aliensoldier105
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had to correct one of my posts, after a mistake i made, my Phenom 965 is actually a 125w version, at least that's what the website I bought it from stated. anyway i dont mean to sound paranoid, hope nothing is broken. :)