pwm curve running loop motor too high

Nov 26, 2005
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Just changed out X58 motherboards. I am using a Swiftech MCR x20 Drive integrated res and pump with the rad. The cpu pwm settings in the bios only offers "votlage" and "pwm" I can't set the fan speed % like I did on my EVGA 760 A1 X58. The cpu pwm curve on the UD7 board is way too high. 35* on the CPU and the motor runs at 100%. Way to fast and loud, not to mention it will burn out the motor soon. Is there any work around for this? The Swiftech has a 4 pin Molex to the PSU, and a 4 pin cpu pwm connector for the motherboard header. I was thinking I could bypass the 4 pin pwm and set a fan speed controller powering the 4 pin molex. Any other ideas???

Thanks
 

aigomorla

CPU, Cases&Cooling Mod PC Gaming Mod Elite Member
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Sep 28, 2005
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that would make the direct drive run @ 100% unless u had a potentimeter of some sort to control the voltage because i cant think of anything outside a super expensive fan controller that has a PWM sense line.
 

BonzaiDuck

Lifer
Jun 30, 2004
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I wish I'd stumbled on this thread sooner.

Yes -- if I wanted an add-in fan-controller with thermally-controlled fans or groups of fans -- I'd buy the Aquaero. But I'd get the circuit card bare, find or drill some holes in some ideal place in the case, and install it that way -- confident with the software, USB-connection and onboard microprocessor.

My favorite principle for our forum topics: Avoid adding more factors and complexity.

If the motherboard features a set of fan ports divided between CPU and chassis, you have potential for two fan curves affecting two different groups of fans. If the fans are 3-pin, you can run them in parallel from the same mobo port and the same fan-curve would apply. If there are two CPU fan-ports, (ASUS provides "CPU_FAN_OPT"), they will both run on the same fan curve, but having two still comes in handy when your $10 8-port Swiftech PWM splitter already has eight ports available.

Ultimately, for whatever make of motherboard and I understand we're talking about Nehalem hardware -- it should be bundled with Windows software allowing the creation of fan-curves and the testing of fans over their speed range.

What sort of X58 motherboard wouldn't have two sets of ports: 3-pin and 4-pin, or CPU and CHA?

Am I missing something? Also -- I'm curious: You mentioned the control choices by "voltage" and "PWM" or a implicit mention of it. Do you have these choices for CPU versus CHA fan-ports -- independently within the BIOS? Are there similar menus for the two items for each group of fans?

Some boards have PWR fan-ports, which are not controllable. I think instead, one can use those ports to monitor the disconnected tach wire in the second fan of a parallel-wired pair, or for that matter individual unmonitored fans on a Swiftech splitter. You have to add up the amperage for multiple parallel 3-pin fans to stay within the mobo limit of usually 1 AMP/port and a total for the board. For the Swiftech or similar PWM splitter, I would think a re-routing of fan tach wires to the PWR ports would work equally, as long as the configuration excluded the first, only and single fan on the splitter that is monitored through the CPU or ---_OPT fan port.

If you can do it with the motherboard, save the money and the trouble. Invest in some splitters and get comfy with soldering iron for parallel-connections.
 

BonzaiDuck

Lifer
Jun 30, 2004
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. . . . Also -- for this replacement board . . . is there a BIOS upgrade or update?

If you can't figure out how to set a fan curve for the CPU_FAN port on that board, you may be better off with the Aquaero. I think the model I'd looked at was the Aquaero 5. It's been a while.
 

BonzaiDuck

Lifer
Jun 30, 2004
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What are you going to do with the Swiftech unit? Your link attracted my curiosity. IF there's something wrong with the Swiftech kit, I myself would like to know. I just don't think they'd get something wrong with a simple PWM connection.

There absolutely has to be a way to control the CPU_FAN port, even if you resort to something like SpeedFan.


Thanks for all that but I temporarily removed the loop and installed my old Heatsink.
 
Nov 26, 2005
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It's in 100% perfect working order. I just can't figure out a way to lower the motor speed. It'll burn out if I don't plus it's too noisy. It worked perfectly in my EVGA board as the bios offered adjustable % numbers for constant speeds. It also has a Auto feature. The Gigabyte UD7 board doesn't offer the same thing. It only has 'Voltage' which will cut the motherboard header from 4 pin to 3 active pins, hence when in PWM mode all the pins on the header are active thus giving anything hooked up to it a regulation.

I looked into Speedfan and couldn't figure it out.
 

BonzaiDuck

Lifer
Jun 30, 2004
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Yup, updated the bios finally. It didn't change the 'PC Health status' options.

"Figuring out" SpeedFan can try one's patience. One needs to identify the fans being controlled and the sensors, but I once had it set up to control a CPU fan according to CPU temperature.

This aspect of your Gigabyte board really surprises me. From my own experience with LGA775 Gigabyte boards, there should be a bundled fan-control software, and you could also download it from the board's support web-page.

Barring that, the Aquaero controller should resolve the problem, but it's extra parts, extra software, extra USB connection, and an extra factor in organizing your computer case.
 

dlerious

Platinum Member
Mar 4, 2004
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. . . . Also -- for this replacement board . . . is there a BIOS upgrade or update?

If you can't figure out how to set a fan curve for the CPU_FAN port on that board, you may be better off with the Aquaero. I think the model I'd looked at was the Aquaero 5. It's been a while.

The Aquaero 5 came in PRO, XT, and LT (bare board) versions. 6 is only PRO and XT (what I have).
 

BonzaiDuck

Lifer
Jun 30, 2004
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The Aquaero 5 came in PRO, XT, and LT (bare board) versions. 6 is only PRO and XT (what I have).

I'm personally surprised to hear myself say this. For me, if I could still find the 5-version as bare-board, the relative price could lead me to the bare-board -- without even looking at PRO or XT versions. I used to plan on plenty of 5.25" bay panels available. While I need at least two when I'm building a system, I'll go without adding something I'd get through reliable USB-link and software. I'd look at it differently if I continued allowing myself to use full-tower cases, which I still did until 2008. A 2007 Q6600 system was some 4" higher than full-tower spec -- a Proliant Server case modded to future needs. I made the mistake of handing it off to a family member, and getting it back now is unlikely. But it was just too big.

On the other hand, I've always chosen to mod a new parts purchase right away as needed, if I could reassemble it to clear an RMA process. Unless, of course, there's some decal seal that has to be broken. But why would they do that, if they had offered the LT in the earlier model? Don't think they would.

Hence the reason why I'm not installing any software to control the fan speed. I don't need all that extra jazz :p

I think there is a misconception about this, if only for a subset of motherboard manufacturers. And if the remainder haven't climbed on the bandwagon to provide controllable and reliable 3-pin-plus-PWM ports, they're going to lose out to market segments that include me.

This is also why I try and stick with ASUS boards, although EVGA seemed pretty good. I'd also suspect that the ASRock boards are good with these features.

ASUS provides the ASUS Suite software, which is really a main menu exposable from a monitoring window. You only need to open the software when you need to. I often run Afterburner in the background, and I don't want the Suite monitor to complicate or conflict. But sometimes, the ASUS monitor provides info that overlaps and augments the other software, like AIDA64, HWMonitor and so forth.

You can "turn off" the plug-ins associated with the Suite. So I prefer tuning my overclock in the BIOS, and I de-activate the Turbo-EVO feature in the Suite.

Among those components of Suite, there is a Fan Xpert program or parallel with a newer name. Basically, setting two or three different fan profiles for specified motherboard ports is only a graphical UI tool to change BIOS parameters affecting thermal fan control. But once you've set the fan curves to your liking, you neither need to run ASUS Suite nor Fan Xpert.

The fan software component also has a testing feature -- good in assessing relative noise of a fan or fan-group. On my system and version of Suite, I can only test the fan(s) connected to the CPU_FAN PWM port (including anything connected to CPU_FAN_OPT.)

Otherwise, once you've set up the fan configuration, there's no "software clutter."

I look for decent fan features even when I have to buy a board replacement. Sometimes you can't get everything you want, but at least strive to find what you need.
 

dlerious

Platinum Member
Mar 4, 2004
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876
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I'm personally surprised to hear myself say this. For me, if I could still find the 5-version as bare-board, the relative price could lead me to the bare-board -- without even looking at PRO or XT versions. I used to plan on plenty of 5.25" bay panels available. While I need at least two when I'm building a system, I'll go without adding something I'd get through reliable USB-link and software. I'd look at it differently if I continued allowing myself to use full-tower cases, which I still did until 2008. A 2007 Q6600 system was some 4" higher than full-tower spec -- a Proliant Server case modded to future needs. I made the mistake of handing it off to a family member, and getting it back now is unlikely. But it was just too big.

On the other hand, I've always chosen to mod a new parts purchase right away as needed, if I could reassemble it to clear an RMA process. Unless, of course, there's some decal seal that has to be broken. But why would they do that, if they had offered the LT in the earlier model? Don't think they would.
PPCS has it for $72 http://www.performance-pcs.com/aquacomputer-aquaero-5-lt-usb-fan-controller.html