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GPU Fan mod

BlueAcolyte

BlueAcolyte

Platinum Member
I stuck my Intel HSF fan onto my accelero S1 because I was too cheap to buy the turbo module. It should be stable but I still have to downclock the memory because it has no heatsinks on it. Anyway, I've noticed this fan is only spinning at 700-900RPM, and I would like it to go faster. Noise is not an issue since I game with headphones, but please help if able.
 
Didn't your S1 come with RAM heatsinks? Odd.. get a Zalman RAM heatsink set, should be able to get them cheap. The S1 is great in that it needs very little direct airflow to make an impact. Connect the fan to a fan controller?
 
Six out of eight heatsinks fell off and my dad doesn't want to buy anything else. Someone in the graphics forums suggested cutting the wires into 4 separate ones then plugging them in.
 
The thermal tape on those S1 RAM heatsinks is notoriously bad. You really should looking into fixing that situation by buying some thermal adhesive. I mean, you seem to have lost any reason to have bought the S1 in the first place. You say you aren't concerned with noise and are looking to put a CPU fan on there. Well, noise reduction is one of the main reasons to buy an S1. Then you say you have to downclock the memory because of the heatsink issue... well, overclocking is other main reason to buy an S1. If you aren't going to fix the RAM heatsinks it seems you are better off putting the stock cooler back on.
 
Unfortunately 4 pin intel retail fans are PWM or pulse width modulation while all video cards I know of to date(through the nvidia 8x00 and ati hd2x00) use standard voltage variation so, you could modify the connector to plug in but, the fan speed will not be variable and given the extra size of the motor and the extra wattage pulled by the intel retail fan it would tax the voltage regulator assigned to the fan. There are some circuit diagrams online for different PWM fan controllers and totalled, if you just cram a simple single channel controller in a project box it should be about $10, depending on where you can get the components.
 
The fan is only 80mm... Does the energy required to run one at 1000-2000RPM really tax the GPU that much compared to running, say, the crappy 60mm fan at 2000-3000RPM?

Besides, if this fails, I have another fan that I'm using in my case right now. This is really just for fun as I am happy with my performance coming from an ATi X600. Running the card up to spec would be nice though.

Oh, I just remembered... My card can pull up to 150w of power... I think it's not that much to start a fan...

In the summer, when I have a job, I'll get some more thermal paste, RAMsinks, and maybe another fan and do the job right.
 
Originally posted by: BlueAcolyte
The fan is only 80mm... Does the energy required to run one at 1000-2000RPM really tax the GPU that much compared to running, say, the crappy 60mm fan at 2000-3000RPM?

Besides, if this fails, I have another fan that I'm using in my case right now. This is really just for fun as I am happy with my performance coming from an ATi X600. Running the card up to spec would be nice though.

Oh, I just remembered... My card can pull up to 150w of power... I think it's not that much to start a fan...

In the summer, when I have a job, I'll get some more thermal paste, RAMsinks, and maybe another fan and do the job right.
Click to expand...

i won't say it won't work, i won't say that it's going to permanantly dammage your card either. It's certainly possible and is likely to work fine, it's pretty far ouside manufacturer spec but, look at how much else we run outside of manufacturer spec around here, right? 😉 80mm fans will usually run right between 2.5-3.5watts depending on the fan, i don't really know about the intel stock fan. I know that the fan I pulled off my eVga 7800gt was 1.6w and the aftermarket ones I've used have never gone over 2 watts that I can recall. for the sake of the card I might still plug it in at 12v and see how the noise is cause 100% is probably what you're going to get out of the fan 24/7 unless the fan lin eis only set up for a peak of 2w at which point the internal resistance of the fan is going to drag the voltage down and you may get a tick out of the fan, though not likely.
 
Tick? What do you mean? I know it sounds stupid, but I don't know that much about how fans work except you give electricity to the motor and it spins.
 
Originally posted by: BlueAcolyte
Tick? What do you mean? I know it sounds stupid, but I don't know that much about how fans work except you give electricity to the motor and it spins.
Click to expand...

think of a tick like a fan hiccup or stutter. because of the way PWM fans are internally controlled there is a fairly signifigant(in comparison to non-PWM fans) capacitance that will build up then discharge, so you'll watch the fan go from say 940-950rpm to 1000-1010rpm and back and forth, could be less could be more depending on the internals of the fan and how far off 12v it's getting.
 
Originally posted by: BlueAcolyte
Hmm, nevermind, I looked at my GPU stock fan and it does have 4 pins... Not sure what use PWM is on that thing.
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3850 or 3870?

Ithought I saw 4 pin connectors on those, I don't know the exact pinout, if it's the same as the video card manufactureres tend to make up their own pinouts but, by testing with a multimeter you should be able to tell what pins correspond to what wires. PWM is going to be on all fans eventually, it creates less RF interference and is much easier on fan motors.
 
I have answered this for you on another thread.

To those unsure - 8800GT normally uses .8A fans Intel?s stock Nidecs/Fujikuras are only .55/.6.

Size of the motor is not the best indication of its power consumption. (accepting bets ? can provide pictures)

As to you unwilling to cut/solder ? there is nothing else you can do. If in doubt and need detailed guide what connects to what ? pm. I may even make a picture 4 u.
 
Originally posted by: olmer
I have answered this for you on another thread.

To those unsure - 8800GT normally uses .8A fans Intel?s stock Nidecs/Fujikuras are only .55/.6.

Size of the motor is not the best indication of its power consumption. (accepting bets ? can provide pictures)

As to you unwilling to cut/solder ? there is nothing else you can do. If in doubt and need detailed guide what connects to what ? pm. I may even make a picture 4 u.
Click to expand...

I know motor size isn't so much as a good way to determine draw but, it was all I had to go on. Did nvidia go up to PWM on the G92's as I'm pretty sure G90's didn't use PWM.
 
Originally posted by: olmer
I am not sure about lesser models but all 8800s use PWM fans.
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😵

I've been wrong before and I'm sure it'll happen again. I just don't remember well enough. I'm used to just either leaving the stock on, going to an accelero with a 3 pin fan or going to water so I just must not have paid enough attention. I'd have sworn it was 3 pin on the last GTX I used but, I believe you.
 
OMG, I'm so stupid. There's a 2pin fan header next to the 4pin. But that means I have to take my Accelero off... I plugged my fan into the PWN_FAN slot instead. So my temps have gone down about 6C.

Thanks for the help guys. I appreciate the fast responses.
 
Originally posted by: BlueAcolyte
OMG, I'm so stupid. There's a 2pin fan header next to the 4pin. But that means I have to take my Accelero off... I plugged my fan into the PWN_FAN slot instead. So my temps have gone down about 6C.

Thanks for the help guys. I appreciate the fast responses.
Click to expand...

pics or ban, i know there weren't two fan headers on the cards I've used recently if ever.
 
Originally posted by: BlueAcolyte
woh, woh... fine. Tomorrow, I can't open the computer right now, or I could be wrong.
Click to expand...

It's more of a saying than anything else, I can't actually ban anyone, I will have a little pull with the new mods though... eh, eh, eh. 😉
 
oh... Hmm, I could have sworn that I saw a fan plugged into it somewhere... Lemme look around.

(Five minutes later) Uhh... I guess not.
 
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