Sprocket's New Home

[lynx]

Originally posted by ROSSCO_2004@12 June 2004 - 04:34
Multimeters work as temp probes ?

how? can i do this with mine too or do i need a special one\special attachment???

You simply get 3 different resistance readings across the probe for approximately known temps, then you draw a graph with a line (curve if necessary) joining these points. After that you simply measure the resistance and read off the corresponding temp from the graph.

Don't forget, I'm interested in comparative differences anyway, accurate temps aren't important. What I need to know is when I get the best results, not what that result is.

It's the same with the motherboard question, does the absolute temp matter (within reason) as long as you know that any cooling changes you are making are improving the situation, or overclocking changes are not about to cause chip failure.

BTW, the article suggests that the software could be modified to give a more accurate representation of the true temp. In practice the sensor is probably common across many motherboards, so software such as MBM5 has no choice but to interpret the reading from the sensor in the same way for all boards. A software solution is impractical.

However, the board provides a reference voltage to the sensor. Varying this reference voltage changes the reading provided by the sensor so it is VERY easy for the board maker to alter the temps shown by their board.

I know clocker got his ASUS board some time before I got mine, and his temps on that board have been consistently much lower than mine. It could be that ASUS have already addressed the under-reading problem. It would not make sense for them to knowingly under-read the temp since it would screw up their vaunted A.C.O.P system. Perhaps the sensor chip on that board was new to them, and on early boards they didn't realise it needed a different reference.

[tesco]

sounds hard

[clocker]

Well, speaking of voltages....
Yesterday, among many other changes, I flashed my BIOS to a new, super overclockable version highly touted on the OC.com forum.
Surprisingly, it worked as advertised. Sprocket reached gigaheights she's never seen before.
240x 10, for a stable 2.4 GHz.
This required raising the vCore to 1.8v, up from the stock 1.65v.
Naturally, this lead to higher CPU temps.

( Just for reference, I have still not figured out the temps on this board. MBM5 says that it will access the WinBond diode on chip, but that sensor won't display on any of my options menus so all I can read is the socket thermistor, which agrees precisely with the hardware sensor I have installed. So all my reported temps will be from the socket, NOT the more desirable on-chip diode, until I can get this straightened out...)

Anyway, I figured that perhaps a new tack was called for...i.e. undervolting.
First I had to decide on the acceptable performance hit I was willing to take.
My T-bred 2600+ runs stock at 166x12.5, 2.075GHz.
Benchmarks have shown big improvements in memory by bumping the FSB up to a minimum of 200MHz, so I decided that I would reset my specs to 200x11 and see how low I could undervolt whilst maintaining stability at that speed.

Numerous tests later, the magic voltage number appears to be 1.55v.
Which hardly seems like anything really...the drop of 1/10 of a volt.
This translated into a temperature drop of 4c however.
Perhaps even more actually, as the room ambient has risen as the day progressed.
Case ambient ( which really should be called motherboard ambient as the sensor is on there somewhere) has jumped from 22c to 28c with the afternoon sun shining in. My CPU temps have dropped however, from 40c to 36c.
Later tonight or early tomorrow morning I should be able to replicate my case temp of 22c and then a more accurate assessment of the undervolting effect will be possible.

Chasing cooler CPU temps with hardware ( fans, ducts, etc) certainly helps, but it also appears that voltage adjustments can yield significant results also.
The combination of both approaches seems to be the way to go....

[FlyingDutchman]

Yep, by undervolting from 1.475 Volts to 1.3 Volts I got a reduction in CPU-temps of 9°
CPU went from 57° to 48°

I can't overclock at 1.3 Volts anymore though

[Duffman]

i can't wait to upgrade my components then ill actually participate in these threads, other than my smartass sarcastic coments

[tesco]

Originally posted by Duffman3@13 June 2004 - 18:54
i can't wait to upgrade my components then ill actually participate in these threads, other than my smartass sarcastic coments

What's with your avatar. It just says 404 not found, whatever. is that your avatar or is it a problem with the host? lol. I think i remember seeing you have that avatar for a few months now, and never got around to asking...

[Duffman]

hehe, it was the seen where homer puts is face against the glass on the air plane going "save me jeebus" but i think it got take off image dump for no reason

[tesco]

Originally posted by Duffman3@13 June 2004 - 19:00
hehe, it was the seen where homer puts is face against the glass on the air plane going "save me jeebus" but i think it got take off image dump for no reason

fix it

[kaiweiler]

clocker, what is ther version of bios you upgraded to called??

[Duffman]

Originally posted by ROSSCO_2004+13 June 2004 - 19:01--></div><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td>QUOTE (ROSSCO_2004 &#064; 13 June 2004 - 19:01)</td></tr><tr><td id='QUOTE'> <!--QuoteBegin-Duffman3@13 June 2004 - 19:00
hehe, it was the seen where homer puts is face against the glass on the air plane going "save me jeebus" but i think it got take off image dump for no reason

fix it [/b][/quote]
it keeps saying that my image type is not allowed

*edit* i got it now