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[Official] NVIDIA GPU Mod Club - AKA "The Mod" - Page 558

post #5571 of 8626
thanx..why are the buyable adapters not made with an inline resistor or mini pwer transformer.

what you mean by sell?
if i could get just the old dead cooler of off som1..i could make a nice adaptor..
for im patient and content..funds are limited..so i cant just go and splunge out for the stuff i need..if this was otherwise..
ebay wouldv been raped long ago..theyv got all the fans/adaptors/tim i need and want..
post #5572 of 8626
Resistors would reduce the fan speed only and not allow control and transformers do not work with DC power(certain wave types will pass, but not straight DC).

PWM in the fan just turns on and off the power very fast(the pwm pulses control how many often it is on vs off.). It works kind of like how a switching power supply can get lower voltage by rapid on/off with mosfets.

The problem is the PWM pin does not have any ability(let alone voltage) to actually run the fan so a transistor takes on the actual load of the fan motor.

So you have

1. Negative -
2. 12 volts +
3. Tachometer
4. PWM

This is why a non pwm fan just runs full speed(12 volts). Older headers used to adjust the voltage on the + pin(linear and later with a switching regulator type setup) to allow speed control.

The guy on that website was selling his adapters, similar to what the artisan section here does.

Many of the adapters on e-bay tend to not work as advertised. I have seen too many people complaining about the new 4 pin to 3 pin adapter they got that was just a manual voltage adapter(voltage divider + transistor).
Edited by Nukemaster - 4/2/14 at 2:15pm
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post #5573 of 8626
EVGA GTX 770 CLASSIFIED 4 GO














final


Edited by lucas.vulcan - 4/3/14 at 5:21am
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post #5574 of 8626
That looks great.
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post #5575 of 8626
Very nice mod lucas. Now that OEM heat plate makes better since than the one on my 780. I believe they could make a much better cooling platform if they would look at increasing air flow through the card. Seems to me it wouldn't be that difficult. What kind of bracket is that. And are your hoses long enough for you. thumb.gif
post #5576 of 8626
Hey guys. Do any of you know if the Kraken G10 is compatible with the 780 ti classified.
post #5577 of 8626
Quote:
Originally Posted by hangover66 View Post

Here goes my working log for The Mod.

My main goal was to get out of the case the heat generated by the graphic card. My former card was a Gainward Phantom GTX570 that wasn´t so hot and I could overclock my FSB to 260 MHZ. Since I upgraded it to a Palit Jetstream GTX 770 I had to pull it back to 220 MHz and even so my motherboard (Sabertooth 990FX) sensors were showing temperatures over 50ºC at several places.
The GTX 770 was hiting 81ºC when playing Grid 2. I didn't run any stress test with this setup. I really didn't want to see the result biggrin.gif.

I opted for the zip ties solution since getting any bracket or adapter would be difficult, living in Brazil. Post service and our Customs are something to avoid if you can.

I got the Kraken X40 because of the lengthy tubes (40 cm) since I mounted the radiator on top of my case.

I can´t say how happy I am with the results. Running a lot of stress tests (OCCT, Furmark, Unigine Heaven and Valley) the card reached 54ºC at ambient temperature of almost 30ºC. In games it barely reached 50ºC.

To start the work I had to do a little case modding as my case isn't intended for water cooling. I cut out the top openings and made some way for the coolers tubes. Something like this:

CREATOR: gd-jpeg v1.0 (using IJG JPEG v62), quality = 90




To help keeping the VRM's cool I decided to keep the original heatplate and as I didn't want to use a shim, I had to adapt it so that the X40's block touches the GPU core:







Enough space for the X40 block:



And now the zip ties:







Installing the Graphic card and a 92mm fan to cool the heatplate:



Almost the final assembly:



The "paranoid factor", as this card is factory overclocked and doesn't have VRM temperature sensors I decided to install another fan (from a an old CPU heatsink) on the back of the PCB. More zip ties here (the white ones are just a kind of "suspension" to keep the fan away from the board and get better ventilation, the black one holds the fan in place):







That blue led fan is to cool the motherboard's VRM's down
Very good work there. Did the fans on the back of your card help. Its got to do something and sure cant hurt. thumb.gif
post #5578 of 8626
Thanx nuke..very good info..so in short..
if i just plug in the green and blue wires in the correct pins on gpu itll have pwm control and then the black+yellow 12v from psu..it wont go full throttle?
post #5579 of 8626
Correct. and you may gain about 1%(at full speed) more power envelope(TDP limit) by not powering the fan off the video card smile.gif

At least with my card running the stock fan full blast seemed to increase card TDP a small bit. I think it was about 1% with my test fan at 2000 rpm(but in reality it never seems to need more than about 1200-1400 under full load).

I am fine with temperatures in the mid 50's if it is more quiet. It was into the low 60's under some games with the shim so the gain from removing it can save me some fan speed.

EDIT.

lucas.vulcan's bracket looks almost like one of the Dwood ones(with a bit cut off).
Edited by Nukemaster - 4/3/14 at 6:47am
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post #5580 of 8626
Quote:
Originally Posted by NvidiaFan29 View Post

Hey guys. Do any of you know if the Kraken G10 is compatible with the 780 ti classified.
According to them it will. Their demo vid is amazing! For $30 this is one of the most well thought out items I've ever seen.

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