Troubleshooting: Is it or isn't it the CPU?

EntropicSoul

Honorable
Dec 23, 2016
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10,510
Hello Tom's Hardware community! I've recently started having some troubles that have me a little frustrated, so I'm writing this in hopes of some expert second opinions. I really hate to say "I've tried everything!", but I honestly think I have... most threads on this very topic end at airflow. We are past cleaning and voltage stage of troubleshooting.

A few things that didn't seem to be where the problem started but are probably still relevant: I previously had (I will post my actual specs later) a Gigabyte GAFX-990 UD3 Rev 4 with an FX 8350, and was very happy with the performance. However, when a friend tried to go a little too extreme with his processor upgrade the chance to literally trade up to a 9590 presented itself, so I did. I even already had an H100i V2 water cooler just because I wanted to keep that 8350 cold.

First, I was aware that the UD3 rev 4 could handle the 9590 but was probably the last choice board. So when I had problems right out the gate with the 9590 and had to clock it down to 4.5 Ghz with a 1.45 voltage to get it stable I wasn't surprised, but not happy. After looking for a board that was on AMD's short list that is better than mine and finding nothing in stock for under $300 USD I resorted to ebay. Keep in mind this was only a few months ago and I know this chipset has been replaced by the AM4 finally so I just couldn't bring myself to pay over $200. So ebay it was. I wound up finding a good deal on a used Asrock fatal1ty 990fx professional.

But I still couldn't run stock numbers on the 9590... stuck running underclocked. but gave up caring since I know the 9590s are overclocked 8xxx and hey it was stable and my buddies 970 board can't even run it so I was stuck with it. I just wanted it to be stable at this point because I was not going to pour money into this AM3+ build when I'd rather just wait for the ryzen 7 to drop a tiny bit more in price.

However, I did decide to upgrade my Corsair 850W power supply to an EVGA 1000W GQ just because AMD said so for the 9590.

Ok, at this point we have a stable system. My temps at this time were 40C~50C and hitting low 60s under load.

I have a Thermaltake Core P3 red. I am a fanboy. Red team go. I mention this because this case allows me to mount my PC on the wall, which I did. My Radiator is double stacked with the original Corsair fans mounted on the back, and I have the Thermaltake Riing RGB setup mounted on the front. The fans are all moving air in the same direction and the radiator has been cleaned.

So the Radeon RX580 comes out and I decide it's time to upgrade my Radeon R9 380 and go up from 4 GB VRAM to 8. I did have two 380's in SLI, but that's how I do my graphics set ups. I buy one card when they are new and wait for a price drop to buy the second. Yay me.

I take my rig down off the wall for this because now I had to redo my wiring. The 380's used two 6 pin pcie's for power and the now single 580 has one single 8 pin pcie, which is cool except now I have 3 extra red pcie cable extensions and will still have 2 even when I get a second 580. Oh darn.
I throw the 580 in and get my wiring all perfect. I put it back up on the wall and I can't wait to bench this new 580.

I power on and the system seems like it starts but my displays are blank... Ok, I'm used to weirdness from my systems so I don't panic and just restart. Now it doesn't post... but I don't lose my head. Restart. Beeping, restarts itself, and then bam posts for a very long time, and I mean long enough to read what all the buttons actually do at post (ha ha) and then some, but we finally start. Hmm, ok that was weird but like I said I'm no stranger to that. Now I have to battle the windows startup failure procedure. You know where since your computer was being fussy now windows has to tell you what wrong with it, and your choices are restart, fail to repair, or reformat. Cmon you POS I just got you to start, don't restart! But of course I have to, and the stupid thing wanted to give me problems with warm boots... ugh... so that battle lasted a few minutes.

Finally into windows. The struggle was hopefully worth it. I go get a new driver installer from AMD because I had the 380's on a specific driver package and yes, clean install. But not, because somewhere near the end of the install my computer shutdown, which I assumed was the installed driver needing a restart and my computer just didn't want to warm boot again. Nope. It had BSOD'd. I hadn't seen it, but I sure did on the next startup... Freezes and BSOD's at random times.

I'm going to summarize the next couple days. I put the 380's back in and it seemed to fix the problem at first, but before RMA'ing the 580 I stuck it in my son's computer and told him to crank everything to ultra on every game he played and let him use it for a day. A day of beautiful not-glitchy gaming I might add. My PC started wonking out again with the 380's in it. Put the 580 back in. Checked all connection on the mobo and power supply. Check my temps, even though it's never getting a chance to be under load and what the heck, the pump reads it's working in corsair link but both it and afterburner are telling me my cpu is 70C... ok well maybe it's too hot... so I start lowering voltages and it still says 70C, never up, never down, I can't get it off of 70C. Clean the radiator that I just cleaned a couple weeks ago and reseat the processor with new thermal paste. I use Artic Silver. I've also ran tests on the RAM and SSD and reformatted.

Right now I'm at 4.1 Ghz with 1.375 voltage and it's still 70C, but stable enough to write this post. But stress will make it BSOD or freeze. I would typically assume processor here, but the damn thing is like next to new and all I really did was take it off the wall... Also, the motherboard is used and the only thing I've noticed that I can do to affect the stability is change the LLC. With LLC at 100% I'm not stable at all... currently I have LLC disabled, sad face. My voltage appears to bounce a bit and CPUZ keeps telling me that my multiplier is being throttled to 7x and I have every throttling and power setting I can find in my bios set to disabled, but hey I could be missing something. The PSU is only a few weeks old maybe a month tops. So question marks on the voltage because I've never seen a voltage stay 100% the same.

I am ready to just get another 8350 and be done with this whole situation, but as I've already said I'm not real keen on spending more money that's not an upgrade. I'm absolutely not in a position to upgrade to AM4 yet though and would rather just get an 8350 if that would fix the problem. On the reverse if this is my buying used on the motherboard biting me in the rear then I think waiting until I'm ready to go AM4 before making any further changes makes more sense.

Like I said, I'm looking for a second opinion and/or some good advice.
Oh, and don't bother talking about intel. Like I said, Red team go!

Thermaltake Core p3 red
EVGA 1000GQ
Asrock Fatal1ty 990fx professional
AMD FX 9590
4x Kingston Hyperx Fury 1333 (Red of course)
XFX Radeon RX 580 8GB
PNY 120GB SSD C:
Seagate Firecuda 3TB D:
Seagate Firecuda 1TB E:
Corsair H100i V2 Liquid Cooler added Termaltake Riing for doublestack
 
Update: got my buddy to let me take my old 8350 home to pop it in and rule out the motherboard. System worked flawlessly. Benched, stressed, gamed. All of it worked fantastically. Software read around 35C~45C and 55C~60C under load. So it is confirmed CPU failure.

mdd1963, thanks for the reply, but I'm not sure the temp readings were far off enough to get concerned at this point with real hardware problems happening, since the readings were fine with a functional processor. Thanks for the insight, but regardless of being skeptical of the temp readings the fact remains that the system was malfunctioning and I was honestly looking for some help troubleshooting the real problem. I'm going to venture a guess and say that a real reading can't be guessed by the system while the processor is screwing up.