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The Socket 939 Appreciation Club and Knowledgebase [Official] - Page 713

post #7121 of 28697
Quote:
Originally Posted by txtmstrjoe View Post
VDroop is not manufacturer-specific (AMD or Intel), as far as I'm aware. If I'm understanding things correctly, it's actually a strategy applied by the motherboard designed to protect against the effects of (ostensibly accidental) massive over-voltage.

Here is a neat (yet very technical) discourse on VDroop. Though it may seem to be Intel-specific, my understanding is that the same principles apply to AMDs as well.

Hope this helps.
Good link. I'll read it later. I've worked for 3 semiconductor manufacturers and we have 8 VRm's on Mars . So I have a idea of what I'm talking about.
post #7122 of 28697
Quote:
Originally Posted by blitz6804 View Post
However, I can swear personal evidence that it has occurred to me on AMD. My Gigabyte would lose up to 25 mV between idle and 100% load.
Blitz, I think the problem that you and few others are running into is per the boards manufacturing design. It could be poor regulator circuitry or even an insufficient PSU. Software monitoring is not even close to giving you real numbers. You need equipment such as a oscilliscope and a volt meter to see any real results.

Good luck
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post #7123 of 28697
I just wet my finger tips...and see what happens
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post #7124 of 28697
Quote:
Originally Posted by txtmstrjoe View Post
OK just checked it out and it's all pretty much elementary nothing new there. Any circuit is going to have a vdroop(voltage drop) when a load is placed on it. The trick is the quickness in which the circuit can compensate for not only the drop but for when the load is released. This is exceptionally important as to not overload the components. This is why Chips are designed to operate withing specific tolerances.
post #7125 of 28697
Thread Starter 
Quote:
Originally Posted by Hueristic View Post
OK just checked it out and it's all pretty much elementary nothing new there. Any circuit is going to have a vdroop(voltage drop) when a load is placed on it. The trick is the quickness in which the circuit can compensate for not only the drop but for when the load is released. This is exceptionally important as to not overload the components. This is why Chips are designed to operate withing specific tolerances.
A very good summation.
    
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post #7126 of 28697
Quote:
Originally Posted by thlnk3r View Post
Blitz, I think the problem that you and few others are running into is per the boards manufacturing design. It could be poor regulator circuitry or even an insufficient PSU. Software monitoring is not even close to giving you real numbers. You need equipment such as a oscilliscope and a volt meter to see any real results.

Good luck
Surely, a voltage droop is merely indicative, and not dispositive, of a possible circuitry issue. In my particular case, I can disprove the need of a larger power supply, for switching boards has rid me of the problem. Obviously yes, an oscilloscope would be superior to the on-board sensors in terms of accuracy, but for the relative measures to each other, I would think it matters little.
     
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post #7127 of 28697
Thanks for all the welcomes, its not everyday you find a computing forum as friendly as this to new comers

Quote:
Originally Posted by blitz6804 View Post
AMOCO: those temps are fine.

DiGi-C: I think your RAM might be the issue. You presently have 1x1024 MB PC 2100 and 2x512 MB PC 3200. Not only does mixed densities give you a problem, but 939-K8s dislike having three DIMMs populated. (2 is the way to go; 4 is possible.) Further, the fact that some of the RAM is PC 2100 (DDR 266) is also killing you. Replacing all your RAM with 2x1024 MB PC 2700 or 2x1024 MB PC 3200 will permit much higher clocks. Replacing removing the 1x1024 MB PC 2100 could improve things, but you may notice a more sluggish system due to less RAM. If you did that, perhaps get another 2x512 MB and run it as 4x1024 MB. The overclockability is less than 2x1024 MB PC 3200 (DDR 400) but should do better than you have now.
Yeah thats spot on more or less, but the stick thats showing up as 1024MB to you is actually a 2048MB stick and the 2 PC3200 sticks are actually PC2100 on the sticker & in HWinfo :S its been screwy with what it shows as since day one but it seems to work ok.

Messing with sticks in at the moment has been a pretty big fail, most settings dont go too well with them and because im a relative n00b to OC I just set it to auto and it works out pretty well somehow lol

Ah well only 2 days and I'll be building my new rig
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post #7128 of 28697
A 2048 MB unbuffered RAM DIMM? VERY rare. Further, the NF4 chipset does not support that large of density, which explains why it acts "screwy."
     
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post #7129 of 28697
Quote:
Originally Posted by blitz6804 View Post
Surely, a voltage droop is merely indicative, and not dispositive, of a possible circuitry issue. In my particular case, I can disprove the need of a larger power supply, for switching boards has rid me of the problem. Obviously yes, an oscilloscope would be superior to the on-board sensors in terms of accuracy, but for the relative measures to each other, I would think it matters little.
Blitz, I wasn't necessarily saying you needed a larger PSU. Perhaps your PSU is of poor quality and that is causing the rumored "vdroop"? Who knows. That's why I suggested the digital volt meter and oscilloscope

Good luck
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post #7130 of 28697
Quote:
Originally Posted by txtmstrjoe View Post
A very good summation.
needed to be said.
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