Corsair hx750w 3yo not able to supply system. What wattage do I need?

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ToniMarino

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Ok. So, I bought a new CPU, a new MOBO, a couple of memory sticks and a big cooler for the cpu. My specs at the moment are those:

i5-4670k
ga-z97m-d3h
Geforce 660ti OC Windforce Gigabyte
Kingston SSD v300 120GB
1tb HDD Sata3 7200rpm
2x4GB Kingston fury RAM 1600
2 case coolers
cooler Thermaltake Nic c4
Corsair hx750w

The thing is. Whenever I play a demmanding game like Rome II the pc reboots and it started to get faster reboots every time. I took off the Thermaltake cooler and changed it for the stock cooler that came with the CPU. I'm not overclocking yet, so the only "oc" is the stock turbo boost that brings my cpu constantly to 3.8ghz, instead of the stock value that is 3.4ghz.

Anyway, After I changed the stock cooler, the games took longer to reboot my system. So I figured that it was my PSU that couldnt deliver the power needed. I dont know if that nic c4 cooler eats a lot of power, but I didnt think that it could bem as much as to really make a difference.

My PSU is 3 years old. It's not brand new, but every single review says it is very reliable, and it comes with a 7 year warrantry. I'll change my PSU now but I'm not sure what wattage should I aim for. I really thought that 750w were much more that enough to power my system. I even thought that I might had another VGA there in SLI.
this calculator http://extreme.outervision.com/PSUEngine shows that I need at most a 600w psu. Something must have happened to my PSU that shortened its lifespam badly...
So my question is: What the hell should I do? What PSU to buy? Should I overkill and get a good corsair 1200W? Is my psu capable of powering my pc? I mean, if I buy another one with 750w will it be ok?

thanks in advance. I'm so frustrated. It took me 2 weeks to figure out that this was the problem.
cheers
 
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jimthenagual

jimthenagual

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I'm curious about what temperatures are you getting for your CPU while gaming. Did you reapply thermal paste when you swapped the cooler?

750W is more than enough. Unless the PSU is faulty, it shouldn't be the problem, but I'd start with checking CPU temps to see if it's shutting down the system.
 
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ToniMarino

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Yeah, I checked it! Nothing more than 50C with the stock cooler under heavy load. With the nic4 it never went over 40C with the stress testers. I tested RAM with memtest86 , the CPU with Intel Processor Diagnostics Tool and VGA with Furmark and all components were fine individually, both powerewise and temperatures. It's just during gamming that the pc reboots. I think that that's the only situation where all are stressed at the same time. I also thought that somehow my cpu was drawing more power than needed, I dont know. I changed some settings as disabling turbo boost and intel graphics, but it didnt solve the issue.
 
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ToniMarino

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things are odd all around =(
I already checked temps even seconds before the reboot and all of them were fine. Like 40c for the cpu and 60c for the gpu. The furmark test rose the temps of the gpu to 75c with no reboot.
'
"Is it only in one game that you are crashing, or does it happen in all games? It's odd that you're not crashing during furmark if it's a PSU issue."

With the games I have installed. Metro Last Light, Rome II total war, Shogun2 Total War. It didnt crash Tropico 5 yet, and neither Banished.
I think that the games stress both CPU and VGA, and that's overloading the rail maybe. Furmark and Intel Diag. stress only one at a time, and maybe that's why the pc doesnt restart. =(
But I guess thats the wrong idea, since there's only ones 12v rail with 64A and that seems really a lot...

 
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jimthenagual

jimthenagual

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Man, too bad you don't have another system to swap out the PSU for testing. I'm starting to agree with you though. You've pretty much narrowed it down with the troubleshooting you have done.

The HX750 is such a great PSU, it's hard to point the finger at it, but I think I'd do the same as you and swap it out at this point. A solid 550W would be enough for your system. It's pulling around 300W at full load with that gpu.

 
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jimthenagual

jimthenagual

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49223.png
 
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ToniMarino

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I'm testing things again right now... I've got both my CPU in 90~~100% load, and my VGA too, both around 70C at the same time. Both with 100% TDP. Now, why the hell doesnt it reboot? What else does a game do that could reboot the pc and this stresstest doesnt? Damn... That is killing me hahaah

do you think I should maybe aim for something with higher wattage for future upgrades? I also plan on having the psu for 1+ year

Thanks for this guys you are being very helpful
 
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jimthenagual

jimthenagual

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Yeah, you're in a tough spot for sure. You've troubleshot all your hardware in every way, and they all passed. I'm hoping someone else will come in this thread and think of something we haven't.

Of those PSUs, the TX850 or the EVGA SuperNova are both excellent PSUs, but I personally I"d go with the EVGA. That is an extremely high end PSU, probably the best 850W on the market right now.
 
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ToniMarino

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Another thing crossed my mind... could it be a SATA problem? Maybe my SSD is not working well.. I installed Steam on the SSD and the games on my HDD... maybe the SATA ports are not transferring all the data needed to the RAM and when it needs to transder, say, 6GB it crashes... I'm not sure that's the case, or that that's even possible, and if it is, I have no idea how to test this possibility.. what do you think? I run chkdsk on both HDD and SSD, and both were ok. Does it cover it?
 
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ToniMarino

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Thanks, mate!
everything went fine... no problems here are the results.
I guess there's no need to test the HDD beyond the chkdsk right?

AS SSD Benchmark 1.7.4739.38088
------------------------------
Name: KINGSTON SV300S37A120G SCSI Disk Device
Firmware: 521A
Controller: iaStorA
Offset: 1024 K - OK
Size: 111,79 GB
Date: 31/08/2014 13:22:56
------------------------------
Sequential:
------------------------------
Read: 168,80 MB/s
Write: 78,26 MB/s
------------------------------
4K:
------------------------------
Read: 14,99 MB/s
Write: 77,56 MB/s
------------------------------
4K-64Threads:
------------------------------
Read: 72,41 MB/s
Write: 76,11 MB/s
------------------------------
Access Times:
------------------------------
Read: 0,205 ms
Write: 0,344 ms
------------------------------
Score:
------------------------------
Read: 104
Write: 162
Total: 321
------------------------------
 
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ToniMarino

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Looking at my hwmonitor I found somthing weird... look at the vontages.. I was wondering if it could be a mobo problem.. but then I saw this..


Hardware monitor ITE IT8620
Voltage 0 0.55 Volts [0x2E] (CPU VCORE)
Voltage 1 2.03 Volts [0xA9] (VIN1)
Voltage 2 1.99 Volts [0xA6] (+3.3V)
Voltage 3 3.37 Volts [0xA7] (+5V)
Voltage 5 -7.06 Volts [0x93] (-12V)
Voltage 6 -6.19 Volts [0x81] (-5V)
Voltage 7 2.84 Volts [0x8D] (+5V VCCH)
Voltage 8 1.46 Volts [0x7A] (VBAT)
Temperature 0 34°C (93°F) [0x22] (TMPIN0)
Temperature 1 128°C (262°F) [0x80] (TMPIN1)
Temperature 2 32°C (89°F) [0x20] (TMPIN2)
Fan 0 1031 RPM [0x28F] (FANIN0)
Fan 1 1201 RPM [0x232] (FANIN1)
Fan 3 522 RPM [0x50C] (FANIN3)
Fan PWM 0 0 pc [0x0] (FANPWM0)
Fan PWM 1 0 pc [0x0] (FANPWM1)
Fan PWM 2 0 pc [0x0] (FANPWM2)
Register space LPC, base address = 0x0A30

00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
00 19 10 00 00 FF FF 00 00 00 80 60 00 10 8F 32 FF
10 FF FF FF 77 C7 82 80 80 02 02 FF FF FF FF FF FF
20 2E A9 A6 A7 01 93 81 8D 7A 22 80 20 22 2A 2D 17
30 FF 00 FF 00 FF 00 FF 00 FF 00 FF 00 FF 00 FF 00
40 7F 7F 7F 7F 7F 7F 5F 40 AD 6A D4 00 00 00 00 00
50 FF C8 7F 7F 7F 40 00 00 90 5C 3A 12 65 00 00 00
60 00 14 50 4D 0A 03 00 00 00 14 50 4D 0A 03 00 FF
70 00 14 32 46 1C 03 00 3E 00 14 50 4D 0A 03 00 C0
80 0C 05 FF FF FF FF FF FF 02 30 01 02 01 5A E0 10
90 FF 00 00 00 FF 00 00 00 40 97 00 00 40 FD C1 74
A0 00 00 78 00 00 0A 0F 80 7F 7F 7F 80 00 00 0F 80
B0 C4 43 FF FF FF FF FF FF FF FF FF FF FF FF FF FF
C0 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
D0 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
E0 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
F0 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

Hardware monitor ACPI
Temperature 0 28°C (82°F) [0xBC2] (TZ00)
Temperature 1 30°C (85°F) [0xBD6] (TZ01)

Hardware monitor NVIDIA NVAPI
Voltage 0 0.99 Volts [0x3DB] (VIN0)
Temperature 0 40°C (104°F) [0x28] (TMPIN0)
Fan 0 1290 RPM [0x50A] (FANIN0)
Fan PWM 0 40 pc [0x28] (FANPWMIN0)

the 3.3V rail and 5v rail are much lower.. and also there's no 12v rail there... what's the chance my mobo is at fault here? I guess thats solely a psu problem then...
 
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jimthenagual

jimthenagual

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Software voltage readings can't really be trusted, but those are some interesting numbers. What does it report for voltages in the bios?

My HWmonitor readings as a comparison (Z87 board)

Hardware monitor Nuvoton NCT6791D
Voltage 0 5.08 Volts [0x7F] (+5V)
Voltage 1 3.33 Volts [0xD0] (+3.3V)
Voltage 2 12.19 Volts [0x7F] (+12V)
Voltage 3 0.86 Volts [0x6B] (VIN3)
Voltage 4 0.18 Volts [0xB] (VIN4)
Voltage 5 1.78 Volts [0x6F] (VCORE)
Temperature 0 26°C (78°F) [0x1A] (Mainboard)
Temperature 1 35°C (95°F) [0x23] (CPU)
Fan 0 791 RPM [0x317] (Chassis #1)
Fan 2 773 RPM [0x305] (Chassis #3)
Register space class = 0x8, base address = 0x0A00
 
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ToniMarino

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cpu - keeps ranging from 0.400 to 1.188
+3.3v === 3.34417
+12v === 11.952
+5v === 5.01
cpu VAXG === 0.012
cpu VRIN === 1.764
DRAM === 1.548

yeah,.. they are quite normal there, that numbers dont mean anything
 
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ko888

ko888

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HWMonitor is not interpreting your motherboard's sensor chip signal output properly. This happens with a lot of new motherboards that haven't had their sensor chip mapping incorporated into the HWMonitor utility yet. You can also install GIGABYTE's own utility.

Look in the UEFI BIOS' monitoring page. It should show the voltages there.

CPU voltage will fluctuate due to the CPU's power management features. That's normal.
 
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ToniMarino

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update on the hdd test

AS SSD Benchmark 1.7.4739.38088
------------------------------
Name: ST1000DM 003-1CH162 SCSI Disk Device
Firmware: CC46
Controller: iaStorA
Offset: 103424 K - OK
Size: 931,51 GB
Date: 31/08/2014 14:57:16
------------------------------
Sequential:
------------------------------
Read: 189,05 MB/s
Write: 178,21 MB/s
------------------------------
4K:
------------------------------
Read: 0,59 MB/s
Write: 0,99 MB/s
------------------------------
4K-64Threads:
------------------------------
Read: 2,07 MB/s
Write: 1,01 MB/s
------------------------------
Access Times:
------------------------------
Read: 16,918 ms
Write: 11,863 ms
------------------------------
Score:
------------------------------
Read: 22
Write: 20
Total: 52
------------------------------
 
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