Yeah, got my friend to help out confirming the ohm for the resistor. Just need more confirmation here... Kiasu wei... RM300+ pump here i'm puting on the line...

Can't be helped. If I had one and I fried it, seriously gonna have a very long down time unless I'm willing to use AC pumps instead.

copper blocks are completed already and the rads will be completed within this week....]
but i still get that tygon tubing......hmm.......

Ocforums rheostat guide

Prodigy:I suppose the link above applies to your case since both a fan and a D5 are on dc motors.

According to the calcuation there,
this is what I've found
variable resistor of at least 4.286 ohms is required as following the calculation over at the link provided from the site that a D5 consumes 2amps and 12 vdc.

applying the calculation to d5
by the Ohm's law
12v = Imax * R pump
12v/2.0 = Rpump
Rpump = 6 ohms.

if pump @ 7v , Imin=?
7v= Imin *Rpump
It is known that the pump have a resistance of 6 ohms....
so,
Imin=7v/6ohm=7/6amps

therefore lowering 12v to 7v the diff of potential is 5v
5v = Imin*Rrheostat
so,
Rrheostat = 5v/(7/6)=4.286 OHMs
a rheostat of 4.286 ohms and above would do the trick...
the rheostat must also have a rating of at least 5.000 watts.
Wrheostat = Imin * Rrheostat = 4.286*(7/6)

I think if the bigger the ohm rating of the rheostat the less sensitive the rheostat is towards lowering the voltage, vice versa. The last time I went jalan pasar I was only able to get variable resistor of only 500 ohms the smallest rating .... prb I don't know how to look for them.
It make sense to me, and I hope it helps you and pls other gurus like amok do help on this topic

Thanks a million bro. So my best bet is still around 4-6ohm resistor. Also found out some ways to make the MCP650 pump flow rate better. Looks like I have to wait for the Storm block to reach then able to perform the mod.

My MCP350 pump just died on me this morning. Turned on my PC n went to make a cup of coffee. About 5 minutes later I came back to the PC with my cup of coffee n the PC hanged. Cudn't move the cursor. Then I looked at my Guru Clock n the temp was 80C! Immediately did a hard shutdown by pulling the plug. Thank god I only left the PC for bout 5 minutes. There's more bad news. The temp on the CPU water block was so hot that the tube deformed just enuf to start a leaky drip. After I pulled the plug. I opened the side panel to see what happened. There was coolant on my AGP slot, GC, PCI slots n even the bottom of the case had a pool of water. $HITE! Bloody hell man. I bought a branded kit so that I dont hafta kena nightmare like that n it still happens n only after having the kit for 2 months. What can I do dudes? Can I ask Cudo to exchange a different model pump for the warranty claim ah? No more confidence in the bloody MCP350. Supposed to b an industrial grade pump with 50000hour lifespan sumore.

I just spent the whole day stripping down the PC. Then used the hairdryer to dry all the components thoroughly for a few hours. Then reinstalled everything back with my TT Silent Tower n the stock 6800GT cooler. Crossed my fingers, prayed, booted up n luckily everything works just fine. Thank god my whole PC miraculously survived this horrible event. If it had happened while I was sleeping then the whole PC wud have died man.

My condolenses for your dearly departed pump.

Think of the bright side lor...at least the GODS of Hardware are watching over you and the rig survived.

Ps: But boss...please lar get rid of that "SilentTower"..it's just obscene.

This is why I've always preferred AC based pumps cos at least you have to power it up 1st and know that it runs in the 1st place. And also the fact that crappy gremlins of the PSU won't really affect you

Condolenses to you ianho... maybe ur MCP350 are the unlucky ones... Look at the bright side, hey there's MCP655 waiting for u ler..

ianho....sure or not?
i use same brand wit u ler...
asikk...u running 24/7?
but my "air besar" is running 24/7 loh...no problem at all...
corsair cool jus for OC saje, not yet try 24/7 running...

Looks like u got one of the rotten apples... that 50000 hour lifespan is MeanTimeBeforeFailure or something... so maybe yours just happens to be on the wrong side of mean? Just go swap it for a new one! Mention a few times that it caused your comp to get all wet and caused you undue mental anguish... maybe they'll throw in some freebies hahaha

any1 got storm yet ??

Aiyaaaa. What's wrong with the Silent Tower? It's good man. Idle n load temps almost as good as my water cooling kit. Just that the sound from the UFO fan is a killer. Loud as hell. Anyway, using it now to satisfy my cravings for my daily dose of games. God knows how long the RMA gonna take. From what I hear Cudo has a really good reputation in terms of customer service so I hope they change it for a better model or sumthin. If they give me another MCP350, I'm gonna throw a big fit in the office man. If I really don't get a better pump from Cudo then I'll just keep the MCP350 as a spare.



Those aquarium pumps run on AC right? I remember having a really good Fluval brand aquarium canister filter n that ran 24/7 for years with all the fish crap n algae n everything. What wud b a good pump to buy. I'm willing to spend up 300 on it.




I was running it 24/7. That's y I'm so lucky that I switched it off for 2 days coz I wasn't at home. I dread to think what wud haf happened if it was leaking while I wasn't home. It could haf shorted out everything n started a fire or sumthin.




What apple? I think they sold me the rotten seed oni. Hahaha. Sux man.

This post has been edited by ianho: Aug 1 2005, 11:36 PM

ianho : that fluval pump are good ones.. if im not mistaken made in italy.. another one is HAGEN, also made in italy.. i only got the small pump so cant be use since the flowrate are just too low...

fulamak very dahsyat one waterblock for nvidia 6XXX cards..made of silver n only 3 of it..call it octopus..

saw this in other forum..



http://www.devilmaster.org/modules.php?nam...order=0&thold=0

Phuiyoooh. Very nice work of art. But it's a very scary thought with all those joints thereby increasing the chances of leakage. I'm sooooo paranoid of leaks now I'm even thinking of going back to air cooling for good.

I can imagine the massive restrictions interms of flow rates that block is gonna cause in any loop and plus the fact WC'ing the RAM's aren't worth it in the 1st place since DDR3's are relatively cool running

ddr3 runs cool??? i dun thknk soo lor!! i touch my gc am b4 and very hot !! can burn my fingers!!

that is nice design, especialy the part RAM.

for normal use i think the DDR3 no need or no required for cooling, but in OC it should need it, otherwise blow it first.

if you scared of leaks..

invest in a high end air cooled heatsink

it will priced as much as lower end water cooling set