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Sudden spikes in heat in all-around daily use

Last response: in Components
May 15, 2013 6:21:28 PM

I've used my computer for simple browsing, some picture editing, and somewhat intense gaming (League of Legends, Smite, Rift, Minecraft, the usual) and suddenly, on either Saturday or Sunday, my CPU just started getting REALLY hot while gaming and while at idle.
Before the spikes, my idle CPU temp was usually a few degrees below room temp and the fan speed was around 1800 rpm, so everything was about 28 degrees (Celsius of course) and while playing League of Legends, everything might get about 5 degrees hotter so all components would be around 45 degrees, and fan speed would go up about 300 rpm.
After the spikes, idle temps will be 35 degrees and no matter what game, my computer will get a lot hotter; at least 55 degrees, and my CPU fan will almost max out and I can hear it in my case, while my cpu also gets a lot hotter (I saw it hit about 68 earlier).
I've tried all the troubleshooting I could, and I'm quite lost. In all of this, I've also ordered a new heatsink ( which actually also brings me to a new problem, but I'm going to post this somewhere else more appropriate in the forums.

NZXT Phantom PHAN-001WT White Steel / Plastic Enthusiast ATX Full Tower Computer Case

KINGWIN ABT-750MM 750W ATX 12V v2.2/ BTX SLI Ready CrossFire Ready Power Supply

GIGABYTE GA-990FXA-UD3 AM3+ AMD 990FX SATA 6Gb/s USB 3.0 ATX AMD Motherboard

SAMSUNG 840 Series MZ-7TD250BW 2.5" 250GB SATA III Internal Solid State Drive

AMD FX-8150 Zambezi 3.6GHz Socket AM3+ 125W Eight-Core Desktop Processor FD8150FRGUBOX

EVGA 01G-P3-1556-KR GeForce GTX 550 Ti (Fermi) FPB 1GB 192-bit GDDR5 PCI Express 2.0 x16 HDCP Ready SLI Support ...

Kingston HyperX 8GB 240-Pin DDR3 SDRAM DDR3 1600 Desktop Memory Model KHX1600C10D3B1/8G

Best solution

May 15, 2013 6:37:32 PM

Suspect the power supply. I have have bad experiences with Kingwin.

You got the wattage right. The rest of the preferred criteria are: 80+ bronze minimum and Single Rail. Preferred manufacturers are Seasonic, Corsair and Antec.
May 17, 2013 6:45:48 AM

Both are good. The Antec HCG 750 is made by Delta and is a good supply. The Corsair CX750 is made by Channel Well. Both are very good reputable companies.
May 17, 2013 4:49:07 PM

Thanks for the help! I decided on the corsair model. Modular and whatnot :)