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post #1251 of 1336
.. dc, uhmmhmm yessah. +24v and -48v up to 1000A
post #1252 of 1336
It is current that kills and it is a surprisingly small amount: 100 to 200 mA.

So, with such a small amount of killing current, why are we not all dead? There are many amps flowing in our mobo and we are still alive?

Think of your body as a resistor. Depending on many factors, your body resistance (in a path through your heart) is probably thousands of ohms. Lets say that from your hand to your feet (grounded) you are 1000 ohms. You need 100 volts across (hand to feet) to get 100 mA current flow--enough to cause your heart to go into fibrillation.

I do not know if the body's impedance is different at 60 Hz AC versus DC but it is reasonable to assume that it could be. Also, when we talk about 120 VAC, the number represents an RMS value. The peak value is much greater. So, in fact, a 100 volt DC source is less dangerous than a 100 volt AC source.

Even so, respect anything 100 volts or higher (AC or DC).

When I was in high school (many years ago), I took an elective: Basic Electricity. When the teacher was out, we used to do really stupid things. One was to have a contest to see how high a voltage we could dial up on the variac (variable transformer) while holding the leads with two hands (nice current path right through the heart!!). I do not recall anyone making it above 80 volts. This was stupid behavior--do not replicate this stupidity!!

Finally, what about really high voltages? I went on to study vocational tv repair in high school. The CRT needs a lot of voltage to get the electrons to take the trip from the electron gun to the phosphor. Roughly 10,000 to 30,000 volts. I got crosswise with the HV output in a few TVs. Each time, I just got knocked to the floor. What I think happens is that the instant your muscles take the current surge, they react and if you are lucky, you throw yourself away from the source. If, you are not lucky, you can actually clutch the offending source with no hope of releasing your grasp.

Be careful...always.
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post #1253 of 1336
I have a question.. I have a 4870 and did a bios mod, it allowed me to set higher voltages, but i dont know that they actually did anything?? maybe?? but i heard the 6*** series AMD cards will be able to soft volt mod successfully
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post #1254 of 1336
Would I need or require a PENCIL VOLT MOD for my XFX ATI RADEON 4890 HD -ZSFR VIDEO CARD????
captain864@yahoo.com

If so please do offer any assistance / directives with pictures to do so.
post #1255 of 1336
Quote:
Originally Posted by captain864;11951596 
Would I need or require a PENCIL VOLT MOD for my XFX ATI RADEON 4890 HD -ZSFR VIDEO CARD????
captain864@yahoo.com

If so please do offer any assistance / directives with pictures to do so.

Got some pictures of your card?
    
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post #1256 of 1336
:/ wonder how ima go on my 9400 lol

hopfully well.. shuld be getting supplys 2morro.. but wont be over to push it till can get a heatsink n ram sinks xD their already hot!!! ( +100mhz on mem :/ )

wow bump 4 old thread :/ woopies
Edited by Liighthead - 2/8/11 at 7:33am
    
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post #1257 of 1336
Man, thats some pretty awesome stuff going on. I want to start volt modding but my current video card has a few issues so not the ideal project frown.gif

Good luck on your projects.
post #1258 of 1336
Did anyone tryied to mod the hd6870 Gigabyte GV-R687OC-1GD
194060_0.jpg
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post #1259 of 1336
Quote:
Originally Posted by pal;14628227 
Did anyone tryied to mod the hd6870 Gigabyte GV-R687OC-1GD
194060_0.jpg


Gigabyte6870-202-580x459.jpg
chl_8214-494x580.png
chl_8266_2-460x580.png
diagram-532x580.png

vmem mod
P11808041-580x499.jpg


source
post #1260 of 1336
^^^like a boss


Malk seems to be missing in the essentials thread.... Anyone chat with him on any other sites lately?
    
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