hotspot now that im watercooled - Page 2

pHaestus · 05-09-2002, 12:21 AM

The power circuitry for the 8KHA+ is pretty advanced; your board may crap out above 2.1 because you need to do a more rigorous voltage mod to defeal the overcurrent protection (I recall something about 5 resistors and a potentiometer). There are details on the aoaforums epox forum if you need more than 2.08V or so.

UpAllNight · 05-10-2002, 10:42 PM

Thanx Ph

i read that sometime back at aoa but i didnt feel the need for it till i got water cooled

Thanx for your time

pHaestus · 05-11-2002, 12:00 AM

not a problem at all. If you get that 2nd stage vmod done post pictures! I meant to do it but I only kept the 8kha+ I had for a week or so (and the stage1 VMod was enough at the time).

res0r9lm · 05-12-2002, 08:28 AM

Quote:

Originally posted by DigitalChaos
oh.. and for the AC vs DC talk...

the first city electrical systems were DC... this was eventually decided to be very unsafe.. and they said AC was much safer
(they would display horses and kill them with electricity to show this.. wtf)
go figure

some of the older ships run dc generators which power dc motors that turn props. I think the reason they are used is that dc motors are easier to control speed than ac. dc is definitly more dangerous at the higher voltages.

Brad · 05-12-2002, 01:45 PM

I wish that powerline voltage was about the same (like 5000v), but those transformers dropped power down to 24v dc instead of 115v AC or 240v AC. Think of how much easier it would be

DigitalChaos · 05-12-2002, 10:46 PM

Quote:

Originally posted by res0r9lm

some of the older ships run dc generators which power dc motors that turn props. I think the reason they are used is that dc motors are easier to control speed than ac. dc is definitly more dangerous at the higher voltages.

yup.. dc is definately more dangerous at high voltages... never knew that bout ships.. but i was referring to when they first started running power through a city for the first lightbulbs... if they could only see what we have now... household electricity is still sooooo young... just imagine what it will be like in a few hundred years.... wow

bigben2k · 05-13-2002, 07:52 AM

And that's not the only reason that AC became a standard...

Someone figured out that if power had to be routed to a major city, the size of the cable would have to be larger for DC.

You see, the average voltage of an AC circuit, is actually 0 volts...

The other problem was that there is much more power loss in transmitting a DC source than an AC source. It's also easier to correct a power drop in AC, than it is in DC. (Can you imagine the size of a DC power regulator sitting on top of that pole, next to your house?)

Also, as stated earlier, DC is actually more dangerous, and has this nasty tendency to arc (specifically, 50,000 volts will arc within a 1cm space (3/8 inch for those who are about to complain). It's good if you're welding, but not if you're just trying to enjoy the sun. Since AC has an average voltage of 0 (because it goes positive, then negative 60 times per second), it's less likely to arc.

And another point... since electricity is produced from generators, however they are made to turn, the output is in AC and so, it's cheaper to just transmit it just the way it is.

AC arrives at your house at a frequency of 60Hertz. It's accurate enough for you to time a clock based on that signal. (have you ever noticed that your alarm clock runs faster/slower when it's running on batteries?)

That's my bit for today...

Nordic · 05-13-2002, 05:34 PM

bigben2k, thanks for your lesson in applied electronics (not news to me, but may help others)

I'd just like to point out that the voltage regulator gets really hot when you're volt-modding. Epoxying a passive heatsink to the IC is not a bad idea, it may increase stability when you're at the bleeding edge of what you think your processor can handle.

05-10-2002, 10:42 PM	#27
UpAllNight Cooling Savant Join Date: Apr 2002 Location: HILLBILLY LAND Posts: 159	Thanx Ph i read that sometime back at aoa but i didnt feel the need for it till i got water cooled Thanx for your time __________________ XP1800 @172x10.5 Maze 3..Ehiem 1250..Chevette Rad 1 120mm panaflo @7v 1" shroud All fits nicely inside my case ambient(74 F) 2.0v Core(33.5) Loaded idle(31.5c) Enermax 431 watt Antec 1030B Gainward Geforce 3 TI200 241/548 Sony CDRW Creative 52x CD Soundblaster Live

05-12-2002, 01:45 PM	#30
Brad Thermophile Join Date: Oct 2001 Location: Nuu Zeeelin Posts: 3,175	I wish that powerline voltage was about the same (like 5000v), but those transformers dropped power down to 24v dc instead of 115v AC or 240v AC. Think of how much easier it would be __________________ 2x P3 1100's at 1400, Abit VP6, 2x Corsair 256mb PC150 sticks, 20gb 'cuda ATA-III, 2x 40gb 'cuda ATA-IV in raid 0. 20" Trinitron. No fans 2x 2400+ at 2288mhz (16.0 x 143), Iwill MPX2, 2x Kingmax PC-3200 256mb sticks, 4x 20gb 60gxp in Raid 5 on a Promise SX6000. Asus Ti4200 320/630. Cooled by Water

05-13-2002, 07:52 AM	#32
bigben2k Responsible for 2% of all the posts here. Join Date: May 2002 Location: Texas, U.S.A. Posts: 8,302	And that's not the only reason that AC became a standard... Someone figured out that if power had to be routed to a major city, the size of the cable would have to be larger for DC. You see, the average voltage of an AC circuit, is actually 0 volts... The other problem was that there is much more power loss in transmitting a DC source than an AC source. It's also easier to correct a power drop in AC, than it is in DC. (Can you imagine the size of a DC power regulator sitting on top of that pole, next to your house?) Also, as stated earlier, DC is actually more dangerous, and has this nasty tendency to arc (specifically, 50,000 volts will arc within a 1cm space (3/8 inch for those who are about to complain). It's good if you're welding, but not if you're just trying to enjoy the sun. Since AC has an average voltage of 0 (because it goes positive, then negative 60 times per second), it's less likely to arc. And another point... since electricity is produced from generators, however they are made to turn, the output is in AC and so, it's cheaper to just transmit it just the way it is. AC arrives at your house at a frequency of 60Hertz. It's accurate enough for you to time a clock based on that signal. (have you ever noticed that your alarm clock runs faster/slower when it's running on batteries?) That's my bit for today... __________________ WBTA (Water Block Testing Alliance) Nordic Hardware WC 101

05-13-2002, 05:34 PM	#33
Nordic Cooling Neophyte Join Date: Mar 2001 Location: Umeå, Sweden Posts: 98	bigben2k, thanks for your lesson in applied electronics (not news to me, but may help others) I'd just like to point out that the voltage regulator gets really hot when you're volt-modding. Epoxying a passive heatsink to the IC is not a bad idea, it may increase stability when you're at the bleeding edge of what you think your processor can handle. __________________ Pump:Eheim 1048, Radiator:LPD radiator 100x150x20mm, CPU block:DD Maze-2, GPU block: DD GPU block, Chipset block:Zalman NB32 AMD XP 1500+, EpoX 8K7A, PoV GF3Ti200 Pic of my YY-cube

05-09-2002, 12:21 AM	#26
pHaestus Big Player Making Big Money Join Date: Aug 2001 Location: irc.lostgeek.com #procooling.com Posts: 4,782	The power circuitry for the 8KHA+ is pretty advanced; your board may crap out above 2.1 because you need to do a more rigorous voltage mod to defeal the overcurrent protection (I recall something about 5 resistors and a potentiometer). There are details on the aoaforums epox forum if you need more than 2.08V or so.

05-11-2002, 12:00 AM	#28
pHaestus Big Player Making Big Money Join Date: Aug 2001 Location: irc.lostgeek.com #procooling.com Posts: 4,782	not a problem at all. If you get that 2nd stage vmod done post pictures! I meant to do it but I only kept the 8kha+ I had for a week or so (and the stage1 VMod was enough at the time).

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