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Just got off the phone with the shop. The PSU (CX600M) is defective... again. It folds like a leaf under sustained power usage. That means I got 2 bad CX600M's in a row. Most likely the entire batch from the factory is defective. Lesson learned: don't buy 2 identical pieces of hardware from the...

What I said earlier in the thread was wrong -- I was able to kill the PC using the 650, but it took a lot longer (30 mins vs. 5 mins of stress testing). And in real-world use the 650 never died on me while gaming, whereas the 8800 and 770 did. I did not stress-test the 650 on the Antec PSU for...

Back again. I borrowed a Geforce 8800 GTX (768MB). It sucks down ~180W of power, so it's midway between the GTX 650 (65W) and 770 (230W). And with the 8800 my PC still shuts off, exactly the same as before. This thread's getting long, so here's a summary of the troubleshooting I've tried...

Yeah, that confused me too: if the CPU was crashing under Prime, why did it appear to work with the Antec? :confused::confused: Anyway... at this point, the CPU tests run fine.. for whatever reason. But as soon as I bring the GTX 770 into the picture, I get shutoffs. So I guess I'll focus on...

I installed an aftermarket CPU cooler I bought earlier. Temps are 15-20C less than before: idle 30-40C, peak 68-70C. And that (knock on wood) seems to have fixed my problems with CPU stability. I can run any Prime95 test for at least 30+ mins with no issues. IntelBurnTest works fine too...

I didn't have to send it out: the store replaced it on the spot. I got a brand-new CX600M off the shelf, in retail box. There's no chance that 2 of these PSUs in a row could be faulty (??) so I'm going to try removing sticks of RAM now. And if that doesn't make a difference, I guess I'll RMA...

Well, I returned the PSU to the store and got a replacement (same model: CX600M). Tested it with Prime95 and it rebooted in less than 5 minutes of testing. So that narrows it down: it's either the motherboard, the memory, or the CPU. I am surprised it wasn't the PSU though -- just before I...

Thanks for the advice. You guys are probably right. I will strong-arm my friend (well, acquaintance) to let me borrow his PSU. Even if he says no, since I've established that CPU load alone can crash the PC in Prime95, I can also swap in my old 500W PSU and compare. If it gets stable with the...

I tried stress testing the processor by itself using Prime95. I found that certain Prime95 tests will cause the PC to shut off too. So now there are 2 ways I can cause the PC to shutoff: running Furmark on the GTX770 or Prime95 running solo. Even weirder: it's always the same Prime95 tests...

Good point, I'll try another stress test and log the CPU stats this time.

So.. part of the trouble was again my own stupidity: I forgot the PC was plugged into a UPS, which is only rated for 400W. Power consumption at the UPS was approaching 400W just before the PC shut off. So that's no good. I moved the PC outside the UPS. I also switched my tests from Skyrim to...

So far I've only been testing in Skyrim but I'll try some other games to make sure. Is this any different from checking the "VDDC" and "GPU temp" fields that GPU-Z outputs? I looked at the values it logged just before my PC crashed and they seemed fine...

Windows 8.1 Intel Core i7-3770 3.40GHz Gigabyte B75M-D3H mobo Corsair CX600M 600W power supply Zotac Geforce GTX 770 4GB (ZT-70304-10P) @ 344.65 driver Stock everything no overclocking ^ I just upgraded my video card & PSU to the CX600M and GTX 770 shown above. Since then I've been...