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AMD FX-8350 overclock with ASRock 990FX Fatal1ty Killer problems

post #1 of 8
Thread Starter 
Greetings, I hope I'm writing this on the right place.

I've been messing with this motherboard and cpu, I have already read a lot of things about this combo and overclock with the FX cpu's and 990FX chipset, but I can't find any clarifying answer about overclocking with this motherboard.
Sadly I already have this computer for 3 years now, and I realised late that this board is not the best for overclocking, so far I've apparently reached 4.4ghz with 1.4 volts (1.43v on the uefi and drooping for 1.39/1.4 and even less, because this board has no LLC options)

I have passed more than 6 hours of OCCT, but, the problem, even apparently being "stable", begins when the "Package" reaches around 68ºC and the "CPUTIN" goes up to 94ºC, after that throttling takes place, and temps stabilize on 65ºC on the Package and 80'sºC on the CPUTIN, while the cpu is at 100% load but with the frequency dropping every couple of seconds from 4400mhz to 1400mhz, and it will continue like this till the end of the test.

I have many, but really many things to question, so much wont be in this post because I'm actually kinda lost at the moment and thinking that overclocking this will be impossible... so my main question is, while stress testing makes the cpu throttle back to idle clocks for some seconds, doing this to maintain the temperature controlled on the CPU and VRM's I assume, even if it passed after 6hours of testing, is it "stable"? If no real world workload will butcher my cpu like OCCT, is this viable or simple no because its getting to hot?

Sorry for the long and mess post, but as said, I'm kinda lost with this and sad at the same time, because I would like to get some overclock out of this, and my brain is full of questions in need of answers tongue.gif

The specs:

AMD FX-8350 cooled by Noctua NH-U12P SE2
ASRock Fatal1ty 990FX Killer
G.SKILL TridentX 2400mhz DDR3
ASUS AMD Radeon R9 280X DirectCU II TOP
Enermax REVOLUTION87+ 850W
Case is Zalman Z11plus, all fan slots occupied except the one of the bottom of the case, PSU doesnt allow it ph34r-smiley.gif
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post #2 of 8

Sorry to hear about your troubles! So, if I'm reading what you wrote correctly, you're having some temperature problems. I don't know much about the Noctua you're running, but have you tried re-applying thermal paste and re-seating it? I would probably start with that and see how your temps do. Also, the amount of thermal paste you previously applied could be affecting your temps. I started OC'ing back in the socket 754 days and I have always put a small dot, about half the size of a grain of rice, of thermal paste on my CPUs and have always had great temps under air. I've done this on everything from the old 3000+ Newcastle to my previous 8150 and 8320. I've been watching guys on youtube apply thermal paste and a lot of them are saying to put a criss-cross pattern on your CPU which seems like far too much. Let us know how this turns out!

 

[EDIT]

 

When you install your heatsink and fan, keep pressure on it during installation. In other words, once the heatsink has made contact with the CPU, make sure that it does not lift away from the CPU. Keep it against the CPU and rotate it slightly back and forth before tightening it down. This will help to remove any small air bubble there might be in the thermal paste.


Edited by jestereightfour - 3/26/17 at 10:24am
post #3 of 8
When I upgraded, I went from the 960T all the way to a 8350, and I was really surprised how much additional heat was generated. It is especially prevent during overclocking. Small vcore increases can send temps through the roof. The socket temp is what really seems to raise quickly.

I originally had a Xigmatech dark knight, which was fine for the 960t running 6 cores, but couldn't keep up with the additional load from the 8350. I'm not sure a lot of air coolers can.

The problem you'll have is keeping the socket temp cooler, because that's probably what's triggering it to throttle. 90C, if accurate, is dangerously hot.

Is it stable? It's possible. When I was using the older xigatech heatsink it would also throttle, but using normal applications, it would not, and I never once had any issues with games or other software...

It may not be mathematically stable, but stability is relative to what you're using it for.
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post #4 of 8
Honestly, the 8350 really needs to be on water cooling, in my opinion. Any small amount of research on these chips will tell you how hot they run. I had an 8150 and an 8320 on a corsair all in one cooler, and now I have my 8350 on a custom water loop. At 1.5v @ 5ghz I never see over 50c. It's a hot beast and trying to oc it on air will only go so far.
post #5 of 8
Thread Starter 
But if the CPU is cooled enough and the VRM is the thing heating more, and causing the possible throttle, isn't watercooling worse because the VRM gets less air moving and refreshing it?

Nevertheless I may leave it and not overclock, I would really like to, but oh well, and now that I'm working I don't have money nor time frown.gif
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Crucial MX100 128G HDD WD 1T HDD WD 3T LG BLU-RAY 
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Noctua NH-U12P SE2 Windows 7 Ultimate 64 bits Samsung Syncmaster 2494HS Rocccat Isku 
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post #6 of 8
Quote:
Originally Posted by DarkGamma View Post

But if the CPU is cooled enough and the VRM is the thing heating more, and causing the possible throttle, isn't watercooling worse because the VRM gets less air moving and refreshing it?

Nevertheless I may leave it and not overclock, I would really like to, but oh well, and now that I'm working I don't have money nor time frown.gif


I've got the crosshair v formula z and I can tell you the vrms get pretty warm with the oc setting I'm running, but I've never encountered any thermal throttling due to them over heating in any way. I have zero air flow over them and they seem to hold up just fine. If you're worried the vrms getting hot, you could rig a little fan so they're getting some sort of air flow or just buy a water block for your board, if they make them, and just cool the whole dang thing smile.gif
post #7 of 8
Quote:
Originally Posted by ozzy983 View Post

When I upgraded, I went from the 960T all the way to a 8350, and I was really surprised how much additional heat was generated. It is especially prevent during overclocking. Small vcore increases can send temps through the roof. The socket temp is what really seems to raise quickly.

I originally had a Xigmatech dark knight, which was fine for the 960t running 6 cores, but couldn't keep up with the additional load from the 8350. I'm not sure a lot of air coolers can.

The problem you'll have is keeping the socket temp cooler, because that's probably what's triggering it to throttle. 90C, if accurate, is dangerously hot.

Is it stable? It's possible. When I was using the older xigatech heatsink it would also throttle, but using normal applications, it would not, and I never once had any issues with games or other software...

It may not be mathematically stable, but stability is relative to what you're using it for.

This. Heat is your enemy. Your board isn't the best for much above medium overclocks; it has much trouble dealing with the heat generated when attempting to go above 4.5 GHz. If you're definitely staying on AM3+ platform for the next 1-2 years, you may want to consider selling your current board and getting a Gigabyte 970-UD3P, or Asus 970 Aura. They're both superior electrically, and can be found for less or the same as what you can get for your AsRock 990. Otherwise, go AM4. biggrin.gif

If you don't want to switch out your board, you're really going to have to engineer a space for a small fan behind the socket and one blowing directly over the VRMs. This will definitely allow your board to sit easily at 4.5 GHz, and probably deal with 100-200 MHz above that when ambients are cooler. FX-83xx really starts to open up at 4.6+ GHz, but is also unfortunately exactly where most chips start falling off the voltage efficiency curve, and waste heat becomes a significant issue to surmount. I've found my 8320e has a fantastic sweet spot at 4.5 GHz, so that's where I keep it. My board can handle 4.8, but the heat output and energy consumption isn't worth it for 24/7 usage.
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WD Blue 1 TB 7200 RPM WD Blue 1 TB 7200 RPM Asus 24x DVD-RW Zalman CNPS14X 
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Up in the Air
(14 items)
 
  
CPUMotherboardGraphicsRAM
FX-8350 Asus M5a99fx Pro r2.0 PowerColor 7850 2GBD5-2DHE/OC + Arctic Accelero S1 Kingston HyperX 8GB 1866MHz 
Hard DriveHard DriveOptical DriveCooling
WD Blue 1 TB 7200 RPM WD Blue 1 TB 7200 RPM Asus 24x DVD-RW Zalman CNPS14X 
OSOSMonitorPower
Ubuntu 14.04 x64 Windows 8.1 x64 HP w2207 Seasonic SS-660XP2 ATX 
CaseOther
Corsair 540 Air Crucial MX100 256GB 
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post #8 of 8

^^ Yes, some boards just don't like heat as compared to others. I would also agree to go AM4 if you're not interested in purchasing a new AM3+ board and attempting to further OC that 8350. Although, you did mention money is a potential limiting factor right now so you may just try rigging up a small fan to hit the VRM with some air movement.

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