HIS HD4850 Fan Mod

[Shurakai]

The title is a little vague, but here's what i'm trying to do, no idea if it's possible, but that's why i'm asking

Attached is an image with the area in question circled (image borrowed from the excellent HIS 4850 review on this site) Looks nothing like mine as my two have Accelero's on them, but what i'm trying to do is get my Accelero turbo modules running from the HIS cards themselves. Would this be possible? Modding the normal 3 pin connectors on the turbo modules to fit this connection? I'm pretty handy when it comes to mixing connections and changing things like this, i just have no idea what wire to connect to what in this case lol

Thanks in advance for any replies

 

[Drizzt5]

Ah, I was just thinking about this for the small 80mm fan on my zalman vga coolers. You don't think power from the card itself would be an issue right? I mean... you can run the stock fan at 100% and it's attached to the card and there is no power problems.

I don't see why you couldn't do this, the benefit would be fan control built in because you could use CCC overdrive to control the fan, right?

 

[Shurakai]

Exactly, power isn't an issue, i just wanted to know what each wire is, because all those colors look nothing like the usual 3 pin connections my normal fans have. The benefit i'm looking for is definitely the cards themselves controlling their own Accelero Turbo fans

 

[kenkickr]

Generally Yellow or Red is the Positive, Black is Ground, and Blue is for reading fan speeds/fan speed control. What colors are the wires coming from your fan?

 

[Shurakai]

I wanted to find a picture, but you'd be surprised how hard it is to find a good one quickly on google

Well i don't really need one, the turbo modules just have a normal speed controllable 3 pin connection, 3 wires, black, red and yellow

Edit: What about the green one?

 

[Odin Eidolon]

when you do it, sell me that 4850 iceq4 cooler!

 

[Shurakai]

Alrighty, incoming crude paint drawing

Below is basically what I'm trying to do, going kenkickr's post this is how i could do it, I've drawn the line between the Green and Blue connection as i still don't know what green does

Black - Black = Ground
Red - Yellow = Positive
Yellow - Green/Blue = Still touchy on what they are, but one is definitely fan speed control

So yeah, hopefully it's still possible, just need the feedback from everyone

Oh and Odin Eidolon, trust me, you wouldn't want the IceQ 4 fans, they're loud as hell and have annoying high pitch noises coming from them, I'll be stearing clear of any IceQ thing from now on, they've just gone down hill these days

 

[Shurakai]

Oh, just in case it isn't obvious, the reason this requires a mod is because they are two different types of connections, it's not as simple as connecting the 3 pin accelero connection onto the 4 pin 4850 connection

 

[Odin Eidolon]

Alrighty, incoming crude paint drawing

Below is basically what I'm trying to do, going kenkickr's post this is how i could do it, I've drawn the line between the Green and Blue connection as i still don't know what green does

Black - Black = Ground
Red - Yellow = Positive
Yellow - Green/Blue = Still touchy on what they are, but one is definitely fan speed control

So yeah, hopefully it's still possible, just need the feedback from everyone

Oh and Odin Eidolon, trust me, you wouldn't want the IceQ 4 fans, they're loud as hell and have annoying high pitch noises coming from them, I'll be stearing clear of any IceQ thing from now on, they've just gone down hill these days

really? i have heard vety good things on that cooler, the reviews (even on tpu) say that's excellent

 

[Tatty_Two]

Arent you going to get considerably less fan speed using the boards connector? i am sure it does not supply as much power as the motherboards 3 pin.

 

[Shurakai]

really? i have heard vety good things on that cooler, the reviews (even on tpu) say that's excellent

Well i guess i got two bad lemons in a row then, noisy as hell, high pitched, overall worse than any of my 120mm fans at full speed

Arent you going to get considerably less fan speed using the boards connector? i am sure it does not supply as much power as the motherboards 3 pin.

Problem is my motherboard runs the fans connected to it at full speed... and it doesn't seem there is any options to disable this function, kinda sucks, that's why i want them connected to the card itself, the top one runs usually at 20% and the bottom 10-15%, i'd love the accelero at that speed, as currently they're running at 7volts so they're already pretty slow, cools great still

 

[maf]

Hi, I believe the fan connector on your graphics card uses PWM (Pulse Width Modulation) for fan speed control, instead of lowering the voltage as you would for a normal fan. Here is a table of the connectors:

Table 1 Connector Pinout

Pin____Function___Wire Color
1_______GND______Black
2_______12 V______Yellow
3_______Sense_____Green
4_______Control_____Blue

Obviously the first 3 pins are the same as the ones on your Turbo modules. Unfortunately if you connect to these three pins your fan will likely run at 100% as the fourth pin sends the speed control signal.

On motherboards that support PWM speed control for the CPU fan you can go into the bios and change the control method from PWM to voltage and sometimes to auto, I don't think you have the option of doing that for a graphics card.

Hope that helps

 

[Tatty_Two]

Well i guess i got two bad lemons in a row then, noisy as hell, high pitched, overall worse than any of my 120mm fans at full speed



Problem is my motherboard runs the fans connected to it at full speed... and it doesn't seem there is any options to disable this function, kinda sucks, that's why i want them connected to the card itself, the top one runs usually at 20% and the bottom 10-15%, i'd love the accelero at that speed, as currently they're running at 7volts so they're already pretty slow, cools great still

Cant you set fan control in BIOS? Thats mobo BIOS I mean.

 

[Shurakai]

Hi, I believe the fan connector on your graphics card uses PWM (Pulse Width Modulation) for fan speed control, instead of lowering the voltage as you would for a normal fan. Here is a table of the connectors:

Table 1 Connector Pinout

Pin____Function___Wire Color
1_______GND______Black
2_______12 V______Yellow
3_______Sense_____Green
4_______Control_____Blue

Obviously the first 3 pins are the same as the ones on your Turbo modules. Unfortunately if you connect to these three pins your fan will likely run at 100% as the fourth pin sends the speed control signal.

On motherboards that support PWM speed control for the CPU fan you can go into the bios and change the control method from PWM to voltage and sometimes to auto, I don't think you have the option of doing that for a graphics card.

Hope that helps

Cant you set fan control in BIOS? Thats mobo BIOS I mean.

Ah, yes, PWM, thought that might be the problem, ah well, I'll just stick with my 7v mod from molex connectors then

About my motherboard fan speed control, DFI aren't too smart, there is no way to change fan speed control in my bios (if someone wants to prove me wrong, i would not be mad about it )