PC rebooting on heavy graphic games, replacing psu didnt help

[AgentFilip]

Hello community,
i recently bought new gaming pc. Sadly, i couldnt enjoy it at all, the machine reboots while playing heavy games like far cry 3. I replaced my PSU after reading some threads on the forum. The shop has sent me brand new model of the same type (Corsair VS650w), but it didnt help - HW Monitor shows low voltages in the iddle (11.880 on +12 rail) falling to very low numbers while gaming (up to 11.350). I thought it might be the motherboard giving not enough energy to the PC - the values were regular (12.30) right after installing the psu, but the result remained for a few min. Also, when im disabling the small desk lamp connected to the same electrical socket (the one with multiple sockets) it disables the devices connected straight to the motherboard (such as mouse, keyboard) for a second. I thought it might be the clue for failing motherboard, acting crazy with voltages. Is the PSU to weak for my graphic card or its just motherboard? Sorry if the text wasnt clear enough. All help highly appreciated. Here im posting my PC Specs.

Motherboard: MSI Z87-G45 Gaming
GPU: MSI GeForce GTX 780 OC TwinFrozr 3GB
RAM: Kingston HyperX DDR3 2x4096MB 1600MHz CL9 Intel XMP
PSU: Corsair VS 650W
CPU: Intel Core i5-4670K 3.4GHz

 

[Dblkk]

It could be cpu, motherboard, ram, graphics card, or power supply. I would lean more towards power supply. Your cpu would go around 100w, throw in like idk 40w for rest of system, and then 300w. (your gpu stock is rated at 250w, with minimum recommended 600w, your is an oc so probably closer to 300w)

All that together is around 450w ish. So you should be fine.

But psu stated at 650w, isn't what it gives. If its a 650w bronze, its 80% efficient. So 650w x 80% = 520w. So that's close, but high enough. But 80 bronze means 80% efficient at half load, and drops from there. But even 650w at 65% efficient should be enough to power your setup.

If this is your second power supply now, it makes me begin to move else where with troubleshooting. It could easily be the motherboard, but a lot of other things as well. No real way to test the mobo, maybe run a stress test like prime 95, and then like futuremark or something. I believe furmark is free and is a good graphical test. Try running that and see if that shuts down as well. Check your drivers, maybe fully uninstall and reinstall drivers.

 

[cklaubur]

Do you have your computer connected to a power strip or surge protector? Try plugging it directly to the wall. Messing with a desk lamp should have no effect on anything connected to the computer, but your post suggests some kind of electrical issue.

Casey

 

[AgentFilip]

In the begining, thanks a lot for quick answers, didnt expect that. The electrical socket connected into the wall was tested by the elctrician and he said its fine. The PSU should be fine - my friend who has bought his own pc 1 year ago has a 600 unit and he can manage the newest titles. All of my devices are on warranty and i m jus trying to figure out what should i send them (the "blind" sending all stuff may not be considered properly). I will try to plug the pc into the wall as cklaubur suggested and give an answer. i tried to test my pc with furmark, it didnt shut down but the results were close to make this happen (11.440 on the 12 rail). I can play "light graphical" games like league of legends all day, but when it comes to bf3 or others, it just turns off. thanks a lot, good to see people these days are willing to help

 

[AgentFilip]

Here are the results from the iddle, thought it could help a bit http://s27.postimg.org/lzid4tcqr/image.png. Those are after connecting pc to the wall socket, pretty much the same as before sadly.