is 91*C hot?

I bought a new vid card today and was looking over my system with sandra and noticed my cpu temp at 44C. I ran some tests and checked it again at 46. Surfing the web, I came across MBM5 and installed it. Well when i ran it, the alarm went off and it claimed my CPU temp was 91C. The fan started going ballistic and i quickly popped open sandra and confirmed the temp at 91.
I rebooted my PC and everything was back to normal, cpu temp 47*C according to sandra. I attempt to run MBM5 again but the same thing happens. Anyone know whats up? Is 91*C really really hot? As in, omg pull the plug thats gonna fry hot!? Or was MBM5 lying to me and my machine making the fan go all nuts?

 

I would suggest that its more than likely MBM is not compatible with your motherboard therefore giving false readings
have a look here for a list of compatible boards
http://mbm.livewiredev.com/

 

MBM5 was 'lying' to you as you put it, MBM5 isn't compatible with all mainboards or chipsets so it seems to me, as G_L_S said as well that MBM 5 + your mobo = problems.
Just delete MBM5 and you'll be fine.
temps of 46*C are okay as well.

 

91C is over "melt-down" point for any processor compatible with PCs so yes it was "in-accurate". I had a sensor that gave me a variable reading from +120C to -40C randomly. I'd say that MBM somehow confused the temp sensor chipset, so when you used sandra it again read a false value from the memory.

 

91 isn't really over melt down. I mean it's looking for problems but most AMD CPU's are said to be safe untill 90C. Of course that isn't to say they instantly die if you go over 90C. Generally it's a good idea to keep it below 70C though.

I have actually run one at 95C and not broken it. Of course once I noticed I took it down but it ran up there for a good week and it's still going strong today, although at a much cooler temperature.

 

How were you measuring that? The oficial thermal decomposition temp for most AMD CPUs is 85C, as backed up by the AMD website which has a PDF file giving all top temps for CPUs.

When a CPU gets really hot the termal sensor gets inaccurate as its not calibrated for high temperatures over 75C, which means its getting inaccurate. If it was the onboard sensor, doubly so.

 

I wasn't using an onboard sensor to monitor it because it was an older board and it didn't even have an onboard sensor.

As for the PDF file you consulted can you post a link to it. It's not that I doubt you that it says 85C. I could have been off 5C easily. I'd just like to see it.

At any rate i'd suggest people always try to run below 70C if they want their processor to run for any length of time.

 

Sure, i would have posted a link to it but i was litterally about to walk out the door for school when i posted!

For some reason i cant find that particular file, but in a FAQ it says that the max temp is either V, S or T... V being 85, S being 90, T being 95. this is read off as the third letter in the ordering part number. E.g. A X1800 D M S 3 C

So you might be right... but it depends on the processor. but AFAIK you cant get T class Athlon XPs unless youre really lucky Mine is a S with a Barton core.

And I know all about running it "hot" mine was reporting temps reaching 90C.. that was ridiculous! It was because the heatsink was on backwards :$

 

Coco, you need to look at the AMD website (www.amd.com) for that info, last time I checked you couldn't directly link to the thermal info page.

 

Have you ever tried finding that info on AMD's site? I've looked a few times. I found it once a year or so ago and it said 90C for the highest temp. That was awhile ago though and honestly i've never managed to find it again. If you can tell me where it is that's great. I see people recommend going to their site but you rarely see anyone tell you were to find this information because whever the heck AMD posts it they sure make sure it's hard to find.

Even if you can't link directly to it let me know how you found it on the site, either wya is good with me.

 

Their search utility is so goddamn awful its hard to find ANYTHING on that website. Thus why that info wasnt exactly what i wanted, thought it does tell you some things. I do remember a PDF that had a big ole table with different core names and models, with their respective max temps... hmm.. oh well!

 

HERE is a complete table of core revs, max temps, voltages, ratings etc.

 

Ahh, i see, most of the Athlon XP's up till 2200+ are 90C, and the rest are 85C. That would explain why i thought that they were all 85 (mine is 85 and i presumed max operating temp went UP thought the later models, but obviously not)

 

thanks for the input

 

Thanks for the link fleppen.

 

Thinner cores = lower max temps from what I've seen on the AMD site and the chips are coded like Goldy said.