Computer smelt like burning! help!

[BriggsWare97]

Hello, My computer a few minutes ago smelt like burning by this I meant like sce electric's burning out... I turned it off and opened it. nothing felt too hot and I couldn't locate the smell.

It selt like it came from the top exhaust. I can no longer smell it after turning it back on...

At the time when it smelt I was saving and loading over and over again in skyrim (as I was board) heavily modded if that makes a difference???

Here are my specs:
CPU: I7 4790k
RAM: Corsair Vengeance Pro 16GB 1866Mhz CL9
MOBO: ASUS VII HERO
GPU: ASUS STRIX GTX 970 4GB (3.5GB + 0.5GB) 😉
PSU: Corsair AX760I – I know the 750W is a bit too much but It’s the lowest in the AX/I series! XD
SSD: with the OS; Samsung 840 EVO 258GB – in RAID
SSD: for the main games; Samsung 840 pro 128GB
SSD: This is for other games Crucial mx100 258GB
HDD: For mass storage 1TB
CASE: Corsair 750D – Full tower!
CPU cooler: Cooler Master Hyper 212 EVO
OS: Windows 10 Pro

Thanks and please feel free to ask away

 

[Angel Zavala]

Open the case and try finding where the heat source is.

 

[DeadlyDays]

most often a PSU or wire issue when you smell burning.

 

[BriggsWare97]

I opened that case and could locate anything, There is a lot of dust. so I have ordered some compressed air.
There is a buzzing sound coming from what I believe to be one of the exhaust fans, not to sure which one.

Thanks and please keep helping me out. Feel free to ask more thing!