fx-8150 issues

[sjblair4]

I'm comparing CoreTemp 1.0RC2 to ASUS Sensor 1.00.07 on an ASUS Crosshair V Formula motherboard with an AMD FX-8150 CPU with stock heat sink and fan and 16GB DDR3 RAM running at 1866MHz.

CoreTemp Sensor
49 56 Idle
82 62 Light load running X-Plane 10 (3-4% CPU usage)

The temperature differences are not linear and can't be tuned by adjusting the offset.

If I run Linx, the program that runs all cores at 100% by performing math calculations, the system shuts down as soon as all cores reach 100% load (Linx only gets 5 seconds into the first iteration) while I have shutdown set to 90C. Running 10 iterations of Linx without CoreTemp, Sensor reads 68C.

CoreTemp definately has issues with the AMD FX-8150.

[salsoul]

Im on the FX-8150 and CIVE MB the only prob I have with CT is that it sees my CPU as AMD (ES) and the TDP 28.1 watts. apart from that working great.

btw those are very high temps @ idle I wouldnt like to go much higher than 68 seeing as the T-jmax is 70c

my idle temps on the core temp reading of 20c and 52c under full load @ 4.67Ghz with 1.41v Id say you have a cooling problem.. just noticed you said your on the stock cooler? are you over clocking ?

[sjblair4]

I'm just overclocking from 3.6GHz to 3.88GHz. But I agree, the idle temps seem really high. I've got a killer heat sink and fan on order. Should be here any day. If I have no activity, my idle temp is 55C. I have an infrared thermometer with red laser pointer and my Northbridge runs at 51C at the bottom next to the CPU and 42C above the CPU. My RAM starting with the stick closest to the CPU reads 48.4C, then the next three are 46.5C, 44.6C, and 43.7C moving away from the CPU.

What kind of motherboard are you using, and what heat sink and fan are you using?

[salsoul]

I am using an Crosshair IV extreme MB with the 890FX chipset and Im using a Corsair H100 closed liquid loop with 4 fans in push pull.

I would check that your stock Heatsink is mounted correctly, I can say I have never used a stock cooler since my SLOT A Pentium III 450Mhz. so I have nothing to compare with but that sounds very high @ idle even for a stock cooler.

I would expect @ stock speeds aand voltage to be at least between 25-35c idle and 50-55 max temp under load, be very careful as I said your 2 degrees of the cutoff temp of 70c. silicon degradation is possible at those temps for long periods and you could damage your CPU. Get some Artic silver 5 Thermal compound and resit the stock cooler until your performance cooler arrives.

good luck

[.//TuNdRa]

I concur on the "Check cooling" comment. The FX 8150 Is more than fast enough at stock anyway. There's no point Overclocking it till you've got the cooling to back it up.

I'm running around on an 8120 personally. So far the list of issues I've found with Coretemp is thus: FSB detection sometimes falls over; I've had it reporting any multiple of the 200mhz default so far, (Up to 600mhz.), TDP is listed as 26.8W, and the cores are 12 degrees too low so far as I can see. Thankfully the offset solved this, although I've not had Coretemp and AMD Overdrive running under max load to double-check that a 12 degree offset is correct.

Beyond that; it does appear to work. It does pick up the processor as "AMD Processor (ES)", though. CPUID is; 0x600F12.

Slight thread Hijack, but I saw little reason for making a new thread when we could simply cram all of the available AMD FX related information into this one.

I'm using a Gigabyte GA990FX-UD3 Rev.1.0, Bios Rev; F6f, if that makes any difference to Coretemp as far as FSB detection goes.

Edit; just gave it a quick burn with Prime95; Coretemp is reporting temperatures exactly 12 degrees lower than AMD Overdrive, which i'm inclined to believe is correct, or my Processor idles as sub-ambient.

Tjmax on the FX 8120 is listed as 70 degrees half the time, and 90 degrees the other half. I'm not quite sure which is true, however. I'd rather not overheat my processor to find out.

[vedaire69]

including a register dump for you .

for some reason its reading fx-8150 as AMD processor BE also is there anyway to adjust tjmax as the fx-8150 is supposed to be 61 not 90

[86sixsix]

like everyone else...

1. there is no published tjmax for AMD chips so where you keep pulling 70 and 90 from depending on the version's beyond me (i know it's in a register but please - don't show it to us amd folk)
2. maximum temp for a 8150 is a tcase of 62celcius
3. tdp at stock is 125w not 28.1w
4. processor string name is wrong

5. the core temp is wrong (way low), but not by an offset as people think... tcase+tcore=the real temperature of the insides

clocks, voltages, the rest is perfect.

[The Coolest]

The numerous recognition, TDP, TjMax bugs will be corrected in the upcoming release.
Now that the Trinity CPU is out, I'll try to add support for it ASAP and release 1.0 final - At last.

Now regarding the temperature readings, there's a really good and interesting thread about it on overclockers.com forums.
Read it from this post: http://www.overclockers.com/forums/show ... ost7226850
It should finally explain the weird readings with core temperatures we've been seeing with AMD processors in the last few years.

[The Coolest]

RC4 is now out, it should fix the recognition and TDP problems.
Since the temperature problem is a sensor issue in the CPU itself there is nothing that I can do.
I am exploring an option that may solve this problem as well, but I'm not sure yet.