[SOLVED] Corsair CX750M can't hold i7 4790K & 780 Ti playing The Witcher 3

[HWTactics]

Another thought -- just noticed that GA-Z97X-SLI motherboard.

3.7 / 5 stars on Amazon
3 / 5 eggs on Newegg

One common complaint seems to be sudden power loss. That board only has four power phases too.

Good luck with witcher!

 

[Saru]

One of the most common troubleshooting mistakes is to assume there was only one problem. Two weeks ago i was making threads about why an R9 280X was faster in my stock i5 than my OC'd i7

After a week of troubleshooting and testing i found two broken fan power adaptors, a faulty power cable to my CPU waterblock/pump causing it to throttle occasionally, and that the i5's board has a slightly OC'd PCI-E bus. Perfect example of why complicated issues are so damn complicated.

Yeah... PC gamer has a tough life...

 

[Saru]

Another thought -- just noticed that GA-Z97X-SLI motherboard.

3.7 / 5 stars on Amazon
3 / 5 eggs on Newegg

One common complaint seems to be sudden power loss. That board only has four power phases too.

Good luck with witcher!

Oh god, I did want to save money with the MOBO and PSU

 

[HWTactics]

I used that very same GA-Z97X-SLI mobo for a client with an i5-4570 and he hasn't called me with any problems since I sold it to him last year, so it's not necessarily a time bomb, but it's at least good to know it's a possibility too -- more likely, IMO than the power supply

 

[newtekie1]

Another thought -- just noticed that GA-Z97X-SLI motherboard.

3.7 / 5 stars on Amazon
3 / 5 eggs on Newegg

One common complaint seems to be sudden power loss. That board only has four power phases too.

Good luck with witcher!

You know, I was just going to suggest the same thing. I almost wonder if the VRM on the motherboard is overheating. This can be a particular problem when using Liquid Cooling, like the OP is using, because there isn't a lot of airflow around the VRM like there is with an air cooler.

Oh god, I did want to save money with the MOBO and PSU

Probably the two placed you DON'T want to save money.

 

[Saru]

Hum... VRM's... You mean these red ones?

 

[newtekie1]

The VRM are partially covered by the red heatsinks around the CPU as well as those gray boxes next to the heatsinks.

Generally, a quick way to tell how good a motherboard's VRM is is to count the number of gray boxes. That will tell you how many phases the motherboard has. 3 or 4 is basically the minimum for socket 1150. The better boards will have 8+.

 

[Saru]

The VRM are partially covered by the red heatsinks around the CPU as well as those gray boxes next to the heatsinks.

Hum, but if it is, how to solve this problem?

 

[Mussels]

Hum, but if it is, how to solve this problem?

cool it with a fan!

 

[HWTactics]

Gigabyte was being a little pretentious with those massive heatsinks and only two chokes beside each one.

Edit: Compare to the Gigabyte Z97X-Gaming 3:

Looking much better on the next model up.

3 or 4 is basically the minimum for socket 1150. The better boards will have 8+.

Just like newtekie1 says it!

 

[Saru]

Gigabyte was being a little pretentious with those massive heatsinks and only two chokes beside each one.

Oh yeah, I see now. So, im gonna post an picture from my computer to show to you how is that...

 

[newtekie1]

Hum, but if it is, how to solve this problem?

Getting some direct airflow over them would be the best option. However, I almost wonder if just changing the airflow layout of your case might help, I'm wondering if flipping the PSU around actually made your tests work longer because it was sucking hot air out of the case. Which caused the temps in the case to go down.

What case do you have, and what is your fan layout. Can you post a picture of the whole computer?

 

[Saru]

That's my PC, plz dont laugh...

Oh yeah, there is a fan putting air in to those VRMs and red heatsinks (the white one)... and the black one putting air out...

I think you can see much better now how is this mess...

 

[Saru]

Like an L on the contrary

VVVVVVVVVVVVVVV
< VRM VRM
< VRM
< VRM CPU
<

 

[Saru]

Oh, I forgot... the case is a NZXT Phantom 530

 

[HWTactics]

Looks like both are exhaust fans. That's the way they should be since hot air rises. I wonder what would happen if you flipped the top fan as an intake to push air over the heatsinks with the CPU fan pulling it back out again instead just for the hell of it. I assume you have a couple intakes up front?

 

[newtekie1]

I'd mount the radiator and its fan at the top, and I'd also flip the radiator fan around so it was pulling in cool air and blowing it over the CPU VRM. The top of the case is actually designed for radiators. Then put the white fan at the back as an exhaust.

At the very least, flip the white fan so it is pulling in cool air. The way it is right now, both fans are pulling air out, which is probably not doing much for airflow over the VRM.

 

[Saru]

Looks like both are exhaust fans. That's the way they should be since hot air rises. I wonder what would happen if you flipped the top fan as an intake to push air over the heatsinks with the CPU fan pulling it back out again instead just for the hell of it. I assume you have a couple intakes up front?

You mean flip over the top fan (white one) and putting air out too?

Like this?

 

[Saru]

I'd mount the radiator and its fan at the top, and I'd also flip the radiator fan around so it was pulling in cool air and blowing it over the CPU VRM. The top of the case is actually designed for radiators. Then put the white fan at the back as an exhaust.

At the very least, flip the white fan so it is pulling in cool air. The way it is right now, both fans are pulling air out, which is probably not doing much for airflow over the VRM.

Oh you mean do the same thing with the white one, but putting the white one on the back, and the black one and radiator on the top? (There are 2 fans on the radiator).

 

[Saru]

Ok, I will do it! Thank you, guys. Tomorrow I come back to tell you how is the situation hehe.

And now go sleep, you helped me so much today, you need a break now (3:08 am)

Oh and The Witcher 3 is already open for an hour, GPU and CPU working hard (not hard as Furmark/Prime95 test) and no shutdowns... Oh god, cables... CABLES... .

Thank you guys. See you tomorrow, thank you so much.

 

[newtekie1]

The way you have the fans now they are both pulling air out of the case right now.

Yes, I'd put the radiator and black fan or fans at the top. The white at the back blowing out and the black fans pulling air in.

Also, on a side note, your radiator is mounted upside down, the tubes should be at the bottom.

 

[GreiverBlade]

Yeah, you are right.

So, I changed the position of the PSU (I dont know if it matters) but the fan was down in the case and is now facing up

View attachment 66262

I tried running Prime95 and Furmark.

Last time, the PC survived 10 seconds. Now its 20 min and counting...

It can be the PSU, although, dont know, it might be playing a trick. hahaha

But, the fan was trying to getting air with the case's obstacles.

What do you think, guys?

well ... bottom mounted PSU are meant to have the fan on the bottom where the opening made and specially designed for it, should be, alongside with a dust filter that you clean periodically so the airflow would not be obstructed.

20 minutes of that seems good to me. Did you play W3 after?

As far as PSU recommendation, I like any brand as long as it's gold or platinum. I think the Rosewill capstones are good for the money.

bronze silver gold platinum titanium it matters not, as long as it's a good quality one ... heck even my M12II bronze can rival with a random brand silver or even gold...

GPU needs more juice than CPU.

So... PSU?

I dont think that the GPU itself can shutdown the computer, right? (temps were fine, with 71ºC at max)

he mean : typical power draw of a 4790K : 88w (OC it's more 100 to 125w), typical maximal power draw of a 780Ti PciE slot 75w+ PciE 6pin 75w+ PciE 8pin 150w= 300w (even if it's not the typical load draw or idle draw )

that PSU should handle that load just fine, a loose cable could definitely have caused your intermittent issues.

well yes but it doesn't hurt to buy a good PSU (unlike the CX line) like the Seasonic SS-760XP (plus if i recall correctly the OP need a PSU for his father and planed to use the Corsair for that purpose once he got the replacement

Well... after 33 minutes with Furmark, Prime95, Chrome, MSI Afterburner, GPU-Z opened, the PC shutdown...

I dont know if it's good or it was the cables... but I did my record running these tests with 33 minutes!

But... its not good enough, right? A PSU 750 could handle more? Or is it normal for my rig?

Just to remind:

CPU: i7 4790k 4.0
GPU: GTX 780 Ti
RAM: 16 GB DDR3
WC: Seidon 120V
HD: 1x HD 1TB WD Blue
DVD: 1x DVD RW
Fans: 4 fans
MOBO: GA-Z97X-SLI

well a good 750w could handle more yes ... since my 700w from InWin (Commander III Desert Fox model 80+gold quite cheap price for the quality ) was able to handle a SLI of overclocked ASUS GTX580 Matrix Platinum (who asus recommend a 700w for a single of them) and a Xeon E3-1275v2 (which is typically a i7-3770 with the stock frequencies of a i7-3770K) also my current M12II in 750w could hold my 4690K @4.5 + 2 R9 290 (one under water and one extra borrowed for the test) @ 1000/1400. i would not even have to change it if i get another 980 (well ... maxwell helps a bit... lower power draw ...) but the average load consumption of a 780Ti is close to a 290, so i could also handle 2 780Ti.

 

[Pill Monster]

nonononope ... changing a fan on a PSU is a bad idea ... altho i did it, but it was on a LC-Power 350w for a blue led fan mod after the original fan got 3 blades on 7 flew out of the aforementioned PSU ... and i know that opening a PSU without being qualified is not a good idea ... (tho it works as intended ... i would not use that one on any of my rig, as minor as they could be )

unless you RMA it and Corsair see it's the fan and either change it or replace the whole PSU

Nah replacing a psu fan is only a 5min job. Pull the lid off unscrew the fan disconnect the plug and put the new one in, they're standard 120mm fans same as case fan.


Corsair CX aren't great, quite a few had DOA and early failure issues after Corsair switched OEM on the budget Models. The name escapes me but coulda been great wall. CS will be better hopefully.

Well... after 33 minutes with Furmark, Prime95, Chrome, MSI Afterburner, GPU-Z opened, the PC shutdown...

I dont know if it's good or it was the cables... but I did my record running these tests with 33 minutes!

But... its not good enough, right? A PSU 750 could handle more? Or is it normal for my rig?

Just to remind:

CPU: i7 4790k 4.0
GPU: GTX 780 Ti
RAM: 16 GB DDR3
WC: Seidon 120V
HD: 1x HD 1TB WD Blue
DVD: 1x DVD RW
Fans: 4 fans
MOBO: GA-Z97X-SLI

Why not just pop the board in a microwave for 30s on high and get it over with? Be a lot quicker than trying slow cook your vrms to death with P95 and Furmark.


I was going to suggest a faulty PSU but after reading this post who knows...don't have much sympathy realy.......

 

[GreiverBlade]

Nah replacing a psu fan is only a 5min job. Pull the lid off unscrew the fan disconnect the plug and put the new one in, they're standard 120mm fans same as case fan.

i know ... i wrote that i did it ... but i still don't recommend it

and the connector is a specific one my blue led has a std 4pin molex and a 3pin molex and the 4p molex is connected outside the PSU (micro 3-4pin depending the model, i have some spare PSU fan coming from dead PSU also ...)


edit ... what baffles me is ... 4 powerphase on a Z97 chipset... , i wouldn't even OC my CPU on that kind of board ... there is plenty good and reasonably priced 8+2 phases around the market.

 

[Cvrk]

No, I bought the CX750M in September, 2015.

Time traveler.
If i may be so bold,does the oil stock drop by then ? Help us all out here on tpu forum, by giving us some predictions,so we can all get rich