PC Build with hard hangs

[Breax14]

So I have a horrible habbit of buying components before cross-checking correctly.
But with my latest upgrade, I thought I had checked everything. My latest purchase was a AMD FX-9590. I had already bought a new motherboard to handle the 220W+. But I am periodacly getting hard hangs (freezes). Now my build is:
MoBo: ASRock 990FX Extreme9
CPU: AMD FX-9590
CPU cooler: Noctua NH-D14 (both fans)
GPU: Nvidia GTX 970 4G
Storage: A 2TB harddisk and a 250GB SSD (on which the OS is installed)
Case: NZXT H440
Fans: 6
PSU: Corsair CX750
I suspect the problem is overheating or insufficient power. Temprature seems to be fine, but I don't know what the max tempratures are. And for the power supply, I used several part builder sites which say 750W is enough, but people online recommend 1000W, I do not know how to check what my problem is temp. or power? Any help? Before I buy a 1000W supply I kinda want to know if it isn't overheating (the 1000W+ psu are quite expensive).
Sincerely.

 

[Karsten75]

That whole "1000 W PSU" thing rings a bell. I don't recall exactly, but I've seen threads here where the FX-9590 and it's issues were discussed. It had more to do with some other factor in the PSU and the 1000W delivery was incidental. The AMD FX-9590 needs about 26 amp of current on a single rail. I think that is the reason AND recommends the 1,000 W PSU. Most lower-specPSUs can't deliver that on the single rail. The Corsair CX750 has been the subject of some very mixed reviews and it would not be my choice on a current-demanding rig that comprise the FX-9590.

I also know that airflow over some motherboard components (VRMs, etc.) are more critical since they tend to heat up a lot.

Additionally, there's a reason AMD usually ships this with an AIO liquid cooler. It needs a LOT of cooling and your noctua may not be up to the job in stressful situations.

So overall, I'd agree with you that the build was not planned with 100% foresight. You have identified the two main areas of concern, though (D'oh! - takes me 1000 words to agree with you. )

The AMD Overdrive tool may allow logging. I'd recommend you turn that on and use it to monitor temperatures and current draws. Then after a crash, look at the logs and see which comes closer to the maximum specifications.

In conclusion, I'd like to observe that AMD did no-one a favor by releasing these 220W monsters. It is my considered opinion that one would have to be a hard-core AMD fan to again buy an AMD after suffering through the travails imposed by making a 220W rig work when the corresponding Intel rigs draw around 90W, has cheaper motherboards and the cost of the PSU and cooling solution also offers huge savings.

 

[Breax14]

That whole "1000 W PSU" thing rings a bell. I don't recall exactly, but I've seen threads here where the FX-9590 and it's issues were discussed. It had more to do with some other factor in the PSU and the 1000W delivery was incidental. The AMD FX-9590 needs about 26 amp of current on a single rail. I think that is the reason AND recommends the 1,000 W PSU. Most lower-specPSUs can't deliver that on the single rail. The Corsair CX750 has been the subject of some very mixed reviews and it would not be my choice on a current-demanding rig that comprise the FX-9590.

I also know that airflow over some motherboard components (VRMs, etc.) are more critical since they tend to heat up a lot.

Additionally, there's a reason AMD usually ships this with an AIO liquid cooler. It needs a LOT of cooling and your noctua may not be up to the job in stressful situations.

So overall, I'd agree with you that the build was not planned with 100% foresight. You have identified the two main areas of concern, though (D'oh! - takes me 1000 words to agree with you. )

The AMD Overdrive tool may allow logging. I'd recommend you turn that on and use it to monitor temperatures and current draws. Then after a crash, look at the logs and see which comes closer to the maximum specifications.

In conclusion, I'd like to observe that AMD did no-one a favor by releasing these 220W monsters. It is my considered opinion that one would have to be a hard-core AMD fan to again buy an AMD after suffering through the travails imposed by making a 220W rig work when the corresponding Intel rigs draw around 90W, has cheaper motherboards and the cost of the PSU and cooling solution also offers huge savings.

All my parts have expired the return date, which is okay I'll have to sell them second hand then. So this means I need to buy a new PSU, do you have any recommandations as to which PSU is best/compatible. Ones I have seen are the Seasonic Platinum Series 1000W and 1050 Snow Silent Platinum, the Corsair RM/HX/AX and the NZXT Hale 90 v2 1000W. I don't really now what voltage/ amperage I should be looking for.

 

[rollingbarrels]

Do the "hard hangs" happen straight away, or do they only happen when doing certain things?
Does the HDD light on your case stop completely when this happens as well?
Do any unusual noises come from your computer before it happens?

 

[Karsten75]

I would hesitate to recommend spending money. What I said was from what I gleaned on here, not personal experience. If I was in your shoes, I'd spend some more time doing problem determination with monitors, an infra-red thermometer and a something to monitor input and output current on the PSU (I have lots of ancilliary tools/toys in addition to the PCs I build).

If you're set on throwing more money at your build (See the "Sunk cost fallacy"), then yes, the Seasonic is great, but consult the Tom's PSU Tier List V 2.0 for alternatives. You may get away with a high-quality PSU of lower wattage, one that truly can deliver in excess of 26 Amp on the rail going to the processor. It may be worth starting a new discussion specifically asking for PSU recommendations if you are going that way.