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[Officia]l ASUS ROG Maximus IV GENE-Z68 & Z68(Gen3) Owners Club - Page 590

post #5891 of 7108
Quote:
Originally Posted by harlen View Post

haha yeah I've seen that. Idle temp drops to 22c even though my water temp was sitting at 28 (had just finished lengthy work). It jumped from 22 to 34, so some kind of low end glitch going on there.
Not sure how much the bios is responsible for reporting the CPU temperature though...

Yeah it's been so long since I had stress tested the system that I forgot what it did at idle. And since I can't OC b/c of the BIOS bugs I don't really know how accurate things are. It's annoying b/c I have all my parts for my own water loop coming next week, but need to wait for this to sort out before seeing what I can do
post #5892 of 7108
You can't put any faith in idle temps. It is impossible (simple physics) to idle at less than ambient. The temp is simply misreporting.

The boring reason why is in the way temperatures are "measured". Since core duo days there is no direct temp measurement. The dts sensors measure distance to throttling, not temp, and throttling is assumed to be TJmax. Everything below that is taken from an assumed temperature gradient that can be very inaccurate at idle. Temps under load are going to be more accurate. Until they "measure" temps differently, we're stuck with that.

That's my understanding of Unclewebb's explanation. He wrote Realtemp.
Quote:
Intel never
Intended the DTS sensors to provide us with accurate temps, we can obviously read the data from them but the data they provide is to let us know how close the proc is getting to thermal shutdown. So they are mainly for fan speed control, and alerting of catastrophic cooling failure. But It
is still nice to get a semi-accurate core temp to give us a decent idea how hot our procs are getting when we are
trying to squeeze every little oz of Mhz from them
http://www.xtremesystems.org/forums/showthread.php?179044-Real-Temp-New-temp-program-for-Intel-Core-processors&p=2812536&viewfull=1#post2812536
Quote:
Quote:
Originally Posted by clicker666 View Post
... the TjMax may vary from processor to processor, is this correct?
There is nothing to prove that this is true or false at the moment. Personally I believe that TjMax is standardized across a process line so that all E8x00 dual core desktop processors with a CPUID of 0x10676 all use the same TjMax=95C. That assumption is what RealTemp is based on.

I think that if the factory is making 95C processors then each and every one is calibrated so that DTS=0 right at TjMax=95C. All of the 65nm mobile chips are documented to have a TjMax exactly equal to 100C and the new 45nm mobile chips are all set to exactly TjMax=105C so it doesn't make any sense to me that Intel would set all of the mobile chips to a fixed value but set all of the desktop chips to random TjMax values.

The (++) (--) feature is wide open to variables. For me, since the output from the DTS does not seem to be linear across the entire temperature range of the CPU, it provides me with the only way to make adjustments to idle temperatures to bring them more in line with measured temperatures as outlined in post#1. Without this adjustment, air cooled L2 processors either idle below ambient temperature which is impossible or you can use a TjMax=100C to cover up that problem and end up with them reporting that they are running far hotter than all of the other available Core2Duo processors. Neither solution is correct.

The Idle Calibration feature is just an approximation. It will never completely compensate for a DTS sensor that doesn't seem 100% accurate across the entire temperature operating range. It would be nice if a few users would try to calibrate as outlined in post #1 and report their findings. For me, my E6400 B2 needs a ++ calibration to keep it from reporting below ambient temperatures and my E8400 needs a -- calibration to bring it in line with my E6400. My CoreTemp testing which showed a 25C difference in idle temps between these two processors at the exact same core voltage, MHz and room temperature just doesn't make any sense. Real Temp idle readings should be within a degree or two now for these processors when calibrated.

http://www.xtremesystems.org/forums/showthread.php?179044-Real-Temp-New-temp-program-for-Intel-Core-processors&p=2816252&viewfull=1#post2816252

That thread is all about real temp and temp measurement. A big read, but lets us know that truly accurate temp readings just aren't there, especially at idle.
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post #5893 of 7108
I'm interested only and only in OC. I play games a lot. Is there a better board for less money then maximus V ? If not plan to buy one maximus V :-)

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post #5894 of 7108
Thanks for the detailed response. That clears up a big misconception I had. I knew that idle temps were always a little "off", but never why and to that degree
post #5895 of 7108
Quote:
Originally Posted by Ljanmi View Post

I'm interested only and only in OC. I play games a lot. Is there a better board for less money then maximus V ? If not plan to buy one maximus V :-)
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Very unlikely. Especially when you count in the SupremeFX III and EAX features when you use analog speakers/headset.

Sound with the Maximus V Gene has improved and so have the overclocking capabilities.

Maximus V Gene has seperate VCCIO and VCCSA (design flaw of Gene-Z) and needs less VCore than my Gene Z with the same CPU.

It also draws less power - about 10% percent @ stock idle and overclocked @ 4.5 GHz - thus my 2500K stays 4-5 degree colder @ Prime95 Custom FFT 960K load.
post #5896 of 7108
Nice, one more question about maximus V, is there any fancy ROG light on the board?

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post #5897 of 7108
Quote:
Originally Posted by Ljanmi View Post

I'm interested only and only in OC. I play games a lot. Is there a better board for less money then maximus V ? If not plan to buy one maximus V :-)
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These boards are hit and miss. It seems many (myself included) have stability and compatibility problems because of poor quality control. If you are willing to go through the trouble of RMAing to get a good one, than go for it. Personally, this is likely my last asus board.
post #5898 of 7108
What is else there good? Z77 interested in gaming and OC only frown.gif

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post #5899 of 7108
Quote:
Originally Posted by gazorp View Post

Quote:
Originally Posted by Ljanmi View Post

I'm interested only and only in OC. I play games a lot. Is there a better board for less money then maximus V ? If not plan to buy one maximus V :-)
Sent from my GT-I9100 using Tapatalk

These boards are hit and miss. It seems many (myself included) have stability and compatibility problems because of poor quality control. If you are willing to go through the trouble of RMAing to get a good one, than go for it. Personally, this is likely my last asus board.

This doesn't make me feel very good about my purchase. Although I love asus and will continue to use them. There does seem to be a more than normal amount of unhappy users with this board. I am waiting on a response from Asus for cross shipping. But my board was an open box so I knew this was likely.
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post #5900 of 7108
Quote:
Originally Posted by lightsout View Post

Quote:
Originally Posted by gazorp View Post

Quote:
Originally Posted by Ljanmi View Post

I'm interested only and only in OC. I play games a lot. Is there a better board for less money then maximus V ? If not plan to buy one maximus V :-)
Sent from my GT-I9100 using Tapatalk

These boards are hit and miss. It seems many (myself included) have stability and compatibility problems because of poor quality control. If you are willing to go through the trouble of RMAing to get a good one, than go for it. Personally, this is likely my last asus board.

This doesn't make me feel very good about my purchase. Although I love asus and will continue to use them. There does seem to be a more than normal amount of unhappy users with this board. I am waiting on a response from Asus for cross shipping. But my board was an open box so I knew this was likely.

I don't want to give my hard earned money for a maybe thing and take chances. If I'm paying well then I want no risk If otherwise I go for cheap board and will not ask any question wink.gif

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