Computer won't boot after overclock

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K

Kazzzz

Commendable
Sep 19, 2016
9
0
1,510
Specs:
i5 6400 (OC) 4.3Ghz 1.35v
R7 360 2GB
MSI Z170 Gaming M3
Crucial (1x8 GB)
EVGA 430W PSU
Cooler Master 212 EVO
Okay so yesterday I installed my new Z170 motherboard, everything was working fine until I decided to overclock. I tried overclocking but everytime I changed the frequencies and voltage and saved settings it would reboot and then tell me the overclock failed. (I now realize that I have to delete the windows microcode update) I continued to repeat this by lowering and highering (is that a word) the frequencies and still nothing. I then went and put 4.3 Ghz and 1.35V and my computer switched off and wouldn't boot again. It now runs all the fans, the motherboard lights up and everything but I get no display. Whenever I put my gpu in with the PCI-E cable, my motherboard flashes lights on and off and powers off almost immediately. Also, I should mention that on the motherboard the CPU light is on I never noticed it before, maybe it always was.
My theory is that because when I plug my gpu it uses more power and I have such a small power supply. Maybe it's not giving off enough power. Also I don't get any display most likely because when you overclock non-k processors, you lose iGPU, and because I use my GPU for display and obviously can't use it right now, that might be the reason. People told me to reset CMOS and it'll reset bios etc. but it hasn't done anything for me, I left the battery out over night. I tried jumping the 2 and 3 pins, nothing. Maybe because it's the old bios it's not working I've no idea. I'm new to all of this and probably going to get raged at by the smart pc people but yeah.
TL;DR I think I need a more powerful, power supply. If not, what may be the problem?
 
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K

Kazzzz

Commendable
Sep 19, 2016
9
0
1,510

Thank you for your response.

I didn't notice there was a reset button, I tried removing the battery overnight and nothing happened, I will try the switch that is if my board has one? It's an MSI z170 gaming M3, can you confirm it has a reset button?

I'm using an EVGA 430W PSU. It worked fine when my computer was at 2.7Ghz. I was assuming the PSU couldn't handle the gpu + overclocked CPU's power. I'm going to try my cpu in my old motherboard later to see if it runs at stock. If it does, I'm going to assume it's my PSU too. (I hope it is)
 
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Faux_Grey

Faux_Grey

Honorable
Sep 1, 2012
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Hmm. Sorry, Looks like the M3 doesn't actually have a button on the back, but rather a clear-cmos jumper on the board somewhere.

There's also a slow-mode switch, you could flick that and see if you can boot again.

That power supply should work, but I'd admit it's very much on the low-side if you're going to be overclocking a system.

Your PSU is just an EVGA 430w?
No other model number anywhere? :/
 
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K

Kazzzz

Commendable
Sep 19, 2016
9
0
1,510

This is the exact power supply: https://uk.pcpartpicker.com/product/HvTmP6/evga-power-supply-100w10430kr

I've tried the slow switch, didn't work.

The only reason I assume it's the PSU is because when I plug the graphics card in the system doesn't even turn on, the motherboard flashes the lights, and the fans flick on and off immediately. When overclocking a non-k processor, the iGPU is disabled, so I assume I can't get any display from the motherboard because there's no iGPU and I can't use my graphics card. I also don't think that's the case because my keyboard and mouse don't turn on. I'm really confused what's wrong and don't want to believe my cpu is dead but that might be the case.

 
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K

Kazzzz

Commendable
Sep 19, 2016
9
0
1,510

About 4-5 months max.

I'm going to try my parts in my other motherboard when I get home from work. I'll let you know what happens, if you have any other suggestions though, keep them coming. I'm desperate and appreciate the help.

Thanks.
 
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K

Kazzzz

Commendable
Sep 19, 2016
9
0
1,510


By downgrading the BIOS and using the BLCK method.
 
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bicycle_repair_man

bicycle_repair_man

Splendid
Jan 10, 2014
5,752
2
28,960
OK, increasing the BCLK is also going to overclock the RAM and PCIe slots, amongst other things. This is also the most likely reason why your motherboard throws a hissy fit whenever the GPU is attached.

To achieve a 4.3Ghz overclock, the BCLK would have to be 159, which is a huge increase.

Long story short, the BCLK is too high. Leave it at 100 and increase the CPU multiplier instead. With an i5-6400, you should be able to take it up to 33, or 3.3Ghz, which is the Turbo Boost speed of that CPU.

 
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K

Kazzzz

Commendable
Sep 19, 2016
9
0
1,510

I've seen people easily sit their cpu at 4.05 Ghz, and even I have. But because I never removed the microcode the computer wouldn't allow me to overclock, I kept trying different things. I wasn't aware that, that was the problem at the time so I messed around with the voltage. I made that higher, and the ghz (for some reason) and it shut my computer off and now I have no display. I'm 99.9% sure I can get my cpu to minimum 4GHz stable. If only I knew about the microcode, I wouldn't be in this situation :(

 
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bicycle_repair_man

bicycle_repair_man

Splendid
Jan 10, 2014
5,752
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28,960
Your CPU isn't suitable for overclocking and overclocking is never an exact science, despite what you may have seen. There's no guarantee that your overclock will be the same as someone else's, even if everything is identical.

If you haven't already, reset the BIOS as Faux_Grey suggested and see if the PC starts with and without the GPU attached. If it does, consider yourself lucky and start over by increasing the multiplier. When you've exhausted that, you can begin to increase the BCLK, but go slowly and ensure that your PC is stable with every increase. BCLK overclocking requires a delicate touch.
 
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K

Kazzzz

Commendable
Sep 19, 2016
9
0
1,510

I'm unable to reset bios even when I remove the battery so I assume the CPU is dead. I'm going to test it in my old motherboard when I get home from work to get a clearer answer. I did do what you said, I slowly raised it but everytime it said the overclock failed and it was due to the microcode that windows 10 gives you. I was supposed to delete that but at the time wasn't aware so assumed it was the settings, the voltage to be exact. So I upped that and boom. It rebooted like it would but this time there was no display. Now when I put the gpu in, it flickers on and off so I assume the PSU doesn't have enough watts (seeing as it only has 430w) and I'm assuming I don't get any display because non-k cpu overclocking disables iGPU so without a graphics card, I wouldn't get display. Not sure why it wouldn't reset, maybe it does and my cpu really is fucked. I'll see when I'm home I guess.
 
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K

Kazzzz

Commendable
Sep 19, 2016
9
0
1,510
The problem was solved.. sort of. The cpu works fine in my old motherboard along with the ram and HDD. However the GPU has stopped working in both the new and old motherboard, and the new motherboard still doesn't POST.
 
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