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post #6741 of 14765
Quote:
Originally Posted by cosmomobay View Post

Quote:
Originally Posted by Mega Man View Post

welcome to all !!!!
you cant control any fan with a rpm signal cable. you can only control fans via pwm ( on a compatible header ) or voltage,

Yes, I know that. A three pin fan plug can only be control by voltage, while a four pin fan can be control by pwm ie rpm. If the pump comes with a four pin plug then it can be control by pwm, if it is a 3 pin then it will be voltage.

If it comes with a 3 pin, you can depin the 3 pin plug, use a 4 pin plug and install the rpm signal wire on the pwm hole in the plug , now it will be control by pwm.

i think you need to do some more research on pwm

PWM requires a board to interpret the signal and manage the speed of the fan ( this is a simplified explanation )


the RPM signal wire has NO PURPOSE like you explained

the PWM signal goes from the mobo/fan controller to the fan

the RPM signal goes from the fan to the mobo/fan controller

both are OUTPUTS, neither have the ability to interpret signals for that you need an INPUT !!

RPM signal wires only tell a device what RPMS the fans are running at

PWM wires only take in a signal for said processor to interpret
Edited by Mega Man - 3/25/14 at 6:15am
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post #6742 of 14765
Quote:
Originally Posted by cosmomobay View Post

Quote:
Originally Posted by Mega Man View Post

welcome to all !!!!
you cant control any fan with a rpm signal cable. you can only control fans via pwm ( on a compatible header ) or voltage,

Yes, I know that. A three pin fan plug can only be control by voltage, while a four pin fan can be control by pwm ie rpm. If the pump comes with a four pin plug then it can be control by pwm, if it is a 3 pin then it will be voltage.

If it comes with a 3 pin, you can depin the 3 pin plug, use a 4 pin plug and install the rpm signal wire on the pwm hole in the plug , now it will be control by pwm.



This is ABSOLUTELY INCORRECT under any circumstances.


Mega Man breaks it down pretty well.

I could go into a lot of detail, but it would surely be lost until you're better versed on PWM in general, and the Intel standard as used in PCs in particular.


Darlene
post #6743 of 14765
Can the R4BE read the speed from a fan connector with only 1 wire connected or does it expect some load on the first 2 pins? I added an EK-DDC pump to my system and the pump RPM always display 0. The pump is running fine taking power from a molex. I switch the pin around to get the pump on 7V (12V was noisy). Or does this mean the tachometer on the pump is DOA?

Thanks for any insight on this.
    
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post #6744 of 14765
Quote:
Originally Posted by Errorist66 View Post

Can the R4BE read the speed from a fan connector with only 1 wire connected or does it expect some load on the first 2 pins? I added an EK-DDC pump to my system and the pump RPM always display 0. The pump is running fine taking power from a molex. I switch the pin around to get the pump on 7V (12V was noisy). Or does this mean the tachometer on the pump is DOA?

Thanks for any insight on this.
works fine with just RPM...too many Corsair AIO users to worry about that.
post #6745 of 14765
Hi guys,

This thread looks like a wealth of knowledge and I will make sure to read through it when I have time so I am sorry if my question has already been asked somewhere in the 6000 posts. I'd appreciate it if you guys could help me out here as I am on a timeline and need to return my RMA'd PSU and CPU by the end of the week.

First off I detailed the issues I am experiencing with my current RIVF board here:
Rampage IV Formula - lots of problems

To summarize that, my RIVF board was not stable and now won't stay on for more than 10-30 seconds but when I get into the BIOS it does recognize the CPU and RAM. I did replace the CPU and PSU and also swapped around the RAM with same results. Keep in mind this did run relatively smoothly for about 10 months before it got really bad and finally because unusable.

So now I was lucky enough to get a full refund from the vendor for my RIVF so I just need to take apart my build and send it in. However my choice of available LGA 2011 motherboards is limited as X99 is on the horizon. I am considering the R4BE as a replacement.

With the refund for the RIVF I can get the R4BE for a difference of $165 which would be acceptable cost for me to get my machine back up and running. If I need new RAM thats on the QVL I'm looking at another $180 for G.SKILL Ripjaws Z Series 16GB (F3-17000CL9Q-16GBZH) or $449 for Corsair Dominator Platinum 32GB (CMD32GX3M4A2133C9).

First question:

Can any of you guys who have had the R4BE attest to your experience with it? Is it a lot more stable then the RIVF or RIVE? I've heard some people say it's better but has some issues with perhaps an immature bios. Any feedback you guys can give me on how happy you are with the R4BE would be great.

Second question:

My RIVF was using a i7-3930K and Corsair Dominator GT 16GB Quad Channel DDR3 2133 MHz (CMT16GX3M4X2133C9). I've heard that the i7-3930K should be okay on this motherboard. The RAM however is not on the QVL so I suspect that I might need to order new memory. Does anyone have a R4BE with an i7-3930K and that RAM installed or think I'll have any issues if I try to use them with the board?

Thanks,

Bryan
post #6746 of 14765
Quote:
Originally Posted by Mega Man View Post

i think you need to do some more research on pwm

PWM requires a board to interpret the signal and manage the speed of the fan ( this is a simplified explanation )


the RPM signal wire has NO PURPOSE like you explained

the PWM signal goes from the mobo/fan controller to the fan

the RPM signal goes from the fan to the mobo/fan controller

both are OUTPUTS, neither have the ability to interpret signals for that you need an INPUT !!

RPM signal wires only tell a device what RPMS the fans are running at

PWM wires only take in a signal for said processor to interpret

I guess I had it all backwards, thanks for the clarity.
post #6747 of 14765
Quote:
Originally Posted by cadaveca View Post

works fine with just RPM...too many Corsair AIO users to worry about that.

So I guess the tachometer is faulty on the pump. I'll try it again with the pump at 12V. how much do I feel like draining this thing again after doing all the testing and bleeding. just added the pump, chipset and mosfet block, 2 RAD and a second WB for SLI gtx 780TI.
    
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post #6748 of 14765
Quote:
Originally Posted by cosmomobay View Post

Couple day ago I had a problem where the MB wasn't booting up my #1 video card. I had the #1 PCI orange led lite and the red video boot led light on. So I thought it was a dead card. The following day I start the computer and the video card booted, red led was out but now I had #1 and # 3 PCI orange led light on and the red boot device led light on. The computer booted up find. So I realize I had a corrupted bios.

I switch to the #2 bios, the boot device led went out, but the #1 and #3 PCI led stayed on, computer boot up fine. I did a USB bios recovery on #1 bios, restart the computer, boot device led went out, but the 2 PCI led's stayed on, so this happen's with both bios's. Now after two days the #1 bios led is back on and the computer work's fine.

My question is , can someone check their MB and tell me if any of your PCI led lights are on.

Asus tech support says if the computer is working, I am good to go and leaving it alone. I am still within my return time with Microcenter and I also have the extended warranty on it.


Sorry for my own bump, but can someone answer this for me.
post #6749 of 14765
Quote:
Originally Posted by cosmomobay View Post

Sorry for my own bump, but can someone answer this for me.

Your VGA or the board has crap on the PCIe finger or slot, or maybe you are not giving enough power to the system.
post #6750 of 14765
Quote:
Originally Posted by Errorist66 View Post

Can the R4BE read the speed from a fan connector with only 1 wire connected or does it expect some load on the first 2 pins? I added an EK-DDC pump to my system and the pump RPM always display 0. The pump is running fine taking power from a molex. I switch the pin around to get the pump on 7V (12V was noisy). Or does this mean the tachometer on the pump is DOA?

Thanks for any insight on this.

You only need the one tach wire to read rpm, as long as the pump/fan runs from the same PSU as the device to read/display the RPM does.

The tach circuit in the pump, or fan, essentially is just a mechanism, either optical or electronic/magnetic, that electrically connects the tach wire to the ground wire twice every revolution.

The device being used to "read" the tach signal, (fan controller display or mobo) has an internal resistor that pulls the tach wire up to some positive voltage level, usually 5V or 3.3V, and then counts the number of times the voltage levels drops to near 0V in a given time period, indicating that the tach wire connects to ground.

When you set a pump to run at 7V, by using the 5V wire for gnd, and the 12V wire for +, then the tach wire only connects to the 5V line, and not ground as it was supposed to.


Depending on the circuitry of whatever is "reading" the tach wire, it may or may not, and may not is far more likely, be able to derive an rpm value from the non standard tach signal input level.

The pump at 12V should display fine.


Darlene
Edited by IT Diva - 3/25/14 at 12:01pm
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