ARazorbacks
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Hi, I'm using a 2080 Ti FTW3 Ultra card in a Fractal Design Define S2 Vision case. The case comes with a PWM fan hub (all headers are 4-pin) which has a SATA power supply, one PWM input header, one CPU fan header, and 8 case fan headers. My CPU is using its on AIO liquid cooling system, so is not plugged into the hub. Previously, I had the PWM input header connected to a sys_fan header on the motherboard and the hub worked well. I just removed that connection and, instead, have now connected the PWM input header to the 2080 Ti fan header. The case fans run at maximum speed all the time (as though there is no PWM control). Is there a setting somewhere which links the 2080 Ti PWM fan header to the GPU temp? How do I get the 2080 Ti fan header to work like a PWM fan header? Thank you!
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DeadlyMercury
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Re: 2080 Ti FTW3 Ultra, Using Fan Header with PWM Fan Hub, All Case Fans Run at Maximum
2019/10/30 00:15:01
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You need use X1 to control this fan hub. On default it runs on 100% PWM.
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ARazorbacks
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Re: 2080 Ti FTW3 Ultra, Using Fan Header with PWM Fan Hub, All Case Fans Run at Maximum
2019/10/30 07:17:19
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Thank you for your reply! I figured that would be the case, so looked everywhere within Precision X1 for the fan header setting. The only fan settings I could find are the three fans on the card itself. Those fans all run on a temp curve, so the fan header isn’t tied to any of them. I should have mentioned I couldn’t find the fan header in Precision X1.
Where is the fan header speed setting in Precision X1?
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Cool GTX
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Re: 2080 Ti FTW3 Ultra, Using Fan Header with PWM Fan Hub, All Case Fans Run at Maximum
2019/10/30 08:39:08
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ARazorbacks Thank you for your reply! I figured that would be the case, so looked everywhere within Precision X1 for the fan header setting. The only fan settings I could find are the three fans on the card itself. Those fans all run on a temp curve, so the fan header isn’t tied to any of them. I should have mentioned I couldn’t find the fan header in Precision X1.
Where is the fan header speed setting in Precision X1?
Custom Profile - OR - Fixed RPM are the choices in P X1 to "control the fans" You need to select a Profile 0-9 Make your edit, then enter key Click the Apply Button last Click the Save Button Now when that Profile Number you saved to is Open (PX1 ON) that fan curve is Active If you want a Fixed RPM, save as in the steps Above ..... then you can Close PX1
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ARazorbacks
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Re: 2080 Ti FTW3 Ultra, Using Fan Header with PWM Fan Hub, All Case Fans Run at Maximum
2019/10/30 15:33:04
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Ok, I went into PX1, moved to the temp curve page and turned on Fan Curve Control (red arrow pointing to the radio button in the image below). I applied and saved to one of my profile slots on the right. I have also included the below image to show that the 2080 Ti fans are, per the temp curves I applied, running at 40% as they should be. The case fans are still running at maximum speed. What am I missing within PX1 to get the case fans to actually use the PWM from the 2080 Ti fan header instead of simply running at one speed?
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ARazorbacks
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Re: 2080 Ti FTW3 Ultra, Using Fan Header with PWM Fan Hub, All Case Fans Run at Maximum
2019/10/30 16:14:08
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I popped the case open, unplugged the 2080 Ti fan header from the PWM fan hub, and then plugged one of the case fans directly into the 2080 Ti fan header. PX1 finally recognized a fan as being plugged in and added it to the menu and matched its speed with the custom temp curve (image below). All of the other case fans, still connected to the PWM fan hub, but with no PWM input into the fan hub, are still turning at max speed. So, it seems the default speed for the PWM fan hub is max speed when it sees no PWM input. It seems as though PX1 and the 2080 Ti card do not recognize the PWM fan hub and do not actually send a PWM signal when plugged into it. Does this require a firmware change? What are next steps here?
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GTXJackBauer
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Re: 2080 Ti FTW3 Ultra, Using Fan Header with PWM Fan Hub, All Case Fans Run at Maximum
2019/10/30 16:45:10
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ARazorbacks So, it seems the default speed for the PWM fan hub is max speed when it sees no PWM input. It seems as though PX1 and the 2080 Ti card do not recognize the PWM fan hub and do not actually send a PWM signal when plugged into it. Does this require a firmware change? What are next steps here?
Careful plugging in 3rd party fans/splits/hubs to the GPU fan header as it's limited. I'm not 100% sure but it might be 1 Amp max like MB headers usually are unless that has since changed. I'd check the MB manual for that. As for PWM, when there's no PWM signal, the fans/pumps or what have you will run at max by default.
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Cool GTX
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Re: 2080 Ti FTW3 Ultra, Using Fan Header with PWM Fan Hub, All Case Fans Run at Maximum
2019/10/30 18:40:30
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GTXJackBauer
ARazorbacks So, it seems the default speed for the PWM fan hub is max speed when it sees no PWM input. It seems as though PX1 and the 2080 Ti card do not recognize the PWM fan hub and do not actually send a PWM signal when plugged into it. Does this require a firmware change? What are next steps here?
As for PWM, when there's no PWM signal, the fans/pumps or what have you will run at max by default.
This Your getting into undocumented mods ... trying to get the graphics card to control your PWM fans in your Case Who says that the Card puts out a PWM signal to the coolers fans? It may just be Voltage control on the card to get the fan speeds (above my pay grade) Buy a fan controller for the Case fans may be the best option or Just set a static speed on your case fans I use a Controller
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ARazorbacks
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Re: 2080 Ti FTW3 Ultra, Using Fan Header with PWM Fan Hub, All Case Fans Run at Maximum
2019/10/30 19:08:31
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Yeah, I suppose technically you're correct (which is the best kind of correct) as I've been assuming it's a PWM fan header since it's 4 pins. I can't find anything on EVGA's site detailing how the fan header controls fan RPM, just that it can through PX1. The lack of documentation on such a simple peripheral is a little annoying. It could certainly be using a voltage control which wouldn't be recognized by the PWM hub and, thus, wouldn't show up as an auxiliary fan to the card for PX1 to control. In reference to it having a limited 1A supply, that's fine because the PWM hub has a SATA power cable to supplement the additional current draw and is meant to be plugged into a regular cpu_fan or sys_fan header. I mean, it should just be redistributing the PWM signal to the attached fans. Nothing fancy. Honestly, I still think it's a PWM header (4 pins) that isn't recognizing being plugged into anything, so isn't turned on and can't be controlled in PX1. My official request to EVGA is to confirm if it's a PWM header and why it isn't acknowledging a simple PWM hub. Edit: I should also mention for $1500, this shouldn't be a problem.
post edited by ARazorbacks - 2019/10/30 19:11:18
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DeadlyMercury
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Re: 2080 Ti FTW3 Ultra, Using Fan Header with PWM Fan Hub, All Case Fans Run at Maximum
2019/10/30 22:29:55
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Maybe to recognize fan card needs its rpm be detected. But you said that you have "cpu pwm header and 8 case pwm headers" and you don't use cpu header - that means that rpm output on your pwm input wire is zero. You should connect one of case fans to this "cpu header" (AFAIK there is no "cpu header" - there is only "9 pwm headers" or "3 pwm + 6 dc headers" on default S2, and hub reports rpm of 1st pwm header, they don't call it cpu)
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rchiwawa
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Re: 2080 Ti FTW3 Ultra, Using Fan Header with PWM Fan Hub, All Case Fans Run at Maximum
2019/10/31 15:59:22
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ARazorbacks Yeah, I suppose technically you're correct (which is the best kind of correct) as I've been assuming it's a PWM fan header since it's 4 pins. I can't find anything on EVGA's site detailing how the fan header controls fan RPM, just that it can through PX1. The lack of documentation on such a simple peripheral is a little annoying. It could certainly be using a voltage control which wouldn't be recognized by the PWM hub and, thus, wouldn't show up as an auxiliary fan to the card for PX1 to control. In reference to it having a limited 1A supply, that's fine because the PWM hub has a SATA power cable to supplement the additional current draw and is meant to be plugged into a regular cpu_fan or sys_fan header. I mean, it should just be redistributing the PWM signal to the attached fans. Nothing fancy. Honestly, I still think it's a PWM header (4 pins) that isn't recognizing being plugged into anything, so isn't turned on and can't be controlled in PX1. My official request to EVGA is to confirm if it's a PWM header and why it isn't acknowledging a simple PWM hub. Edit: I should also mention for $1500, this shouldn't be a problem.
My interaction with the 4 pin PWM supplemental fan header on my FTW3 Ultra has led me to believe that despite what its presence implies, the PWM section is not used at all for signaling/control. I have tried a couple of different waterpumps with PWM and no power leads for speed control and no matter what revision of PX1 or pump I connect to it, the pump just runs @ 100%. Fans will obey speed commands but my guess is that anything that uses the PWM signal line only is SOL in the control portion. I am guessing this is how your case's integrated/included fan controller is wired up either externally or electrically on the controller's board. I was a little disappointed upon realization but not enough to bother writing EVGA. It would be really sweet if this was simply an oversight on the PX1 software or card firmware team's end, it got rectified in an update with actual PWM control was implemented in the future. Perhaps it is user error on my part but tbh I just don't see how even I could bungle this. I have surprised myself and others a few too many times over the years to discount this possibility My motherboard has an an annoying design choice through many BIOS revisions of always pegging a PWM device to 100% fan speed if the CPU core temp is 75c. With a device plugged into the CPU and CPU Aux fan headers, it is those fans. Without a CPU fan but someting plugged into one of the water pump PWM headers, that/those get pegged. Only chassis fans, then all chassis fan headers get spun up to 100% The motherboard manufacturer has always responded to my and other like minded owners' request to allow the ability to disable this "feature" with a canned, "we'll take it under advisement and thanks for your feedback. In case you wanted a little background on why I bothered playing around sorting out the 2080 Ti FTW3 Ultra's fan header behavoir. I just ordered up a Corsair Commander Pro to completely bypass my motherboard once and for all. I was being cheap but a year and a half on, I am tired of hearing something irrationally (relative to my cooling config) being spun up to 100% Also, I have a fan controller that can accept a PWM signal from a standard case fan header for governance of connected PWM devices. I have confirmed that it does properly control PWM signal only devices via only PWM signal input and functions without the data connector plugged into the motherboard for control and monitoring. If I get ambitious while installing said Commander Pro or if anyone expresses an interest in my testing that out with the 2080 Ti FTW3's PWM header, I'll see how that behaves this weekend.
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ARazorbacks
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Re: 2080 Ti FTW3 Ultra, Using Fan Header with PWM Fan Hub, All Case Fans Run at Maximum
2019/11/02 10:34:38
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DeadlyMercury ...on default S2, and hub reports rpm of 1st pwm header, they don't call it cpu)
Regardless of what they call it as it's just a fan header, you are absolutely correct! The booklet shows right on the diagram that the intended header for the cpu_fan is the only one that reports fan speed (it was staring me right in the face and I didn't notice, I feel this is an RTFM moment for myself). So, I plugged one of the case fans into that header and tried again. Per the image below, you can see PX1 is now recognizing the case fan through the PWM hub, BUT is not actually applying the appropriate speed control to the fan (10% shouldn't be 1650 RPM). I visually checked the fan directly connected into cpu_fan hoping that maybe that single fan was being controlled properly (even though it's reported speed was high), but no such luck; it's running at max along with the other three case fans using the PWM hub. At this point my conclusion is the 2080 Ti fan header is, indeed, a PWM fan header, but with lackluster firmware. I already know a random motherboard's sys_fan header has no problems with my specific PWM hub, so obviously it can be done. It seems the hardware/firmware team checked the marketing box by adding a PWM fan header, but only partially implementing and testing it. rchiwawa If I get ambitious while installing said Commander Pro or if anyone expresses an interest in my testing that out with the 2080 Ti FTW3's PWM header, I'll see how that behaves this weekend.
If you find the time, I'd love to hear your results! Maybe my PWM fan hub is a bare bones solution while the Commander Pro has some included crutches to help a struggling EVGA PWM header do what it's been marketed to do.
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rchiwawa
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Re: 2080 Ti FTW3 Ultra, Using Fan Header with PWM Fan Hub, All Case Fans Run at Maximum
2019/11/02 11:36:09
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ARazorbacks If you find the time, I'd love to hear your results! Maybe my PWM fan hub is a bare bones solution while the Commander Pro has some included crutches to help a struggling EVGA PWM header do what it's been marketed to do.
Well, I already pulled the rig and installed the Commander Pro so I am going to put trying out the Asus Fan Extension card on PWM only drive off until next weekend. I'll post results then.
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GTXJackBauer
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Re: 2080 Ti FTW3 Ultra, Using Fan Header with PWM Fan Hub, All Case Fans Run at Maximum
2019/11/02 14:34:25
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Also just a heads up, some fan hub's RPM traces lead back to the main source header giving you a erratic reading since it's getting multiple RPM signals while others are properly designed with one fan RPM trace to give you a more accurate reading. Not sure if this is the case here but thought I'd point that out as well.
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ARazorbacks
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Re: 2080 Ti FTW3 Ultra, Using Fan Header with PWM Fan Hub, All Case Fans Run at Maximum
2019/11/14 19:08:25
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While I suppose it's possible it was/is getting conflicting RPM signals, PX1 seems to read a stable RPM on Fan 4, so I'd assume that means it should know it's not running at the correct PWM setting.
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