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[Official] ASUS Crosshair V Formula (990FX) club - Page 798

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  • 34% (35)
    Should I leave the list combined for both the CHVF and CHVF-Z
  • 65% (67)
    Seperate the lists
102 Total Votes  
post #7971 of 9900
Quote:
Originally Posted by mrinfinit3 View Post

I can remember jumping well into the 1.65-1.7V range on my old 965BE @ 4.8Ghz while on the chilled methanol system back in the day.
Built it for the MSI MOA OC competition and was the only "AMD" guy to finish in the top "3" (3DMark Vantage) Next 50+ cpu's below me
were all 1366 i7's.
I probably could have taken it higher (clock speed wise) but it was my last chip of a box of 12 that I had for that contest. But hey got a free Eng. Sample GPU out of it, which I then tossed on ebay for a 300% price increase over retail simply because they wanted the "prize letter" with it.. hell I dunno why it sold for that much but it did..so no complaining here smile.gif

Good times...Good times.. smile.gif

I kind of miss that big ol' chiller system...was fun to have around.


Very creative!!!
post #7972 of 9900
Quote:
Originally Posted by mrinfinit3 View Post

Oh we are ; just playing around tongue.gif Sometimes sarcasm can be "fun".
I have a screen shot of the temp. drop on that system using the physical probe. I'll post it a bit later on when I get home for ya. Just funny how fast it drops after the fan was moved a bit.
However; I will admit I haven't probed the backside of the board, so would be interested in seeing that.
Koolance used to make a kit for the backside of the board....looked like a foil bag with G1/4" fittings. Sadly I cannot seem to find them anymore, else I'd be using one. Especially @ the $40USD cost they had them for originally.

*edit*
Found an old pic:

Admittedly I haven't appreciated the VRMs as much as you "old-timers" have.

The only reason I put the spot fan on my NB was because it has a thermal sensor and I could see the value and it needed to be addressed. Since I'm yet to venture into true watercooling instead of this wannabe H100i thing, the simple solution was to put a fan on the NB. But the VRMs also extend up and to the right in the shape of an L. If it matters, I could also put another fan directly in that area, but I've yet to see anyone do that.
post #7973 of 9900
Quote:
Originally Posted by ihatelolcats View Post

measuring VRM temp is actually very simple. if computer is running, VRMs are cool enough. if VRMs are burning and/or smoking, they are too hot

Very true, o' sage one. biggrin.gif But how to avoid spilling over to the smoking or burning stage....
post #7974 of 9900
Ack! I have been trying to talk meself into buying one of these things but you guys are scaring me. No VRM temperature sensors? This GD80 has one and it really needs three.
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post #7975 of 9900
Quote:
Originally Posted by mrinfinit3 View Post


Ive been interested in back-board cooling, particularly if I jump to FM2+ where the extra cooling might help OC quite a bit,though at this point Ive been considering making my own using a sheet of copper, copper piping pressed and soldered to said plate, something to fit between this and the board and probably some minor modifications to my case so it fits nicely.

not sure at this point what I could use to connect the two though, thermal conductivity tends to be linked to electrical conductivity, might have to do some multi-part trickery to avoid large solder barbs that would keep the plate too far from the surface of the board...
   
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post #7976 of 9900
well you could always use diamond. very good electrical insulator but also excellent thermal conductor
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post #7977 of 9900
Quote:
Originally Posted by Paul17041993 View Post

Ive been interested in back-board cooling, particularly if I jump to FM2+ where the extra cooling might help OC quite a bit,though at this point Ive been considering making my own using a sheet of copper, copper piping pressed and soldered to said plate, something to fit between this and the board and probably some minor modifications to my case so it fits nicely.

not sure at this point what I could use to connect the two though, thermal conductivity tends to be linked to electrical conductivity, might have to do some multi-part trickery to avoid large solder barbs that would keep the plate too far from the surface of the board...
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post #7978 of 9900
Quote:
Originally Posted by miklkit View Post

Ack! I have been trying to talk meself into buying one of these things but you guys are scaring me. No VRM temperature sensors? This GD80 has one and it really needs three.

This is only an issue if you are going for 10 tenths performance IMHO. If you're in this category, you are already doing things above and beyond normal usage, so spending a few bucks and adding the temp probes yourself doesn't seem like a lot to ask.

I still think extrapolating the VRM temp data from the NB sensor should be reasonable...
post #7979 of 9900
Every motherboard is different so take this with a bag of salt. But.

The NB on this GD80 normally runs 45-62C range depending on load. The VRMs have a sensor that normally runs in the 35-40C range depending on use. These temps are verified with a laser thermometer.

The heat sinks are large enough that the only exposed part of the heat pipe is the 90 degree bend between them.

Using the LT the temps of the VRMs are hottest on the bottom and coldest on the top. That means that if the sensor is reading 35C the top is around 28C and the bottom is around 44C. This is on a board with no LLC and air cooling, so they run cooler than most. My first AM3+ board did not have sensors and got so hot it warped from the heat.

How could you extrapolate that from the NB temps?

Also, if a $165 board has a VRM sensor, why does a $240 board not have them? How much do they cost and how are they mounted?
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post #7980 of 9900
Sandman posted how he did it earlier in this thread. Asus I believe sells temp probes and the board itself has headers to accept the probe signal. You'd have to decide which VRM to put the probe to and even then as even you point out, you're only hitting one component out of how many? You still end up extrapolating.

My only point on the extrapolation is that in a fixed test scenario, specific LLC setting and so on, I bet you should see a linear relationship between the NB temp and the VRM temps because on the Crosshair, they share the same physical heatsink. Then, you'd have to know what the upper temp limit of the VRM you are shooting for as a ceiling.

If you think the Crosshair is expensive, I have a 400USD Rampage III Extreme here too, which was a top of the line board back in the day and it doesn't have any thermal sensors on the VRMs either.
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