Posted July 29, 2018 I have this motherboard:https://www.asrock.com/mb/AMD/Fatal1ty AB350 Gaming-ITXac/index.asp Here is the manual:http://asrock.pc.cdn.bitgravity.com/Manual/Fatal1ty AB350 Gaming-ITXac.pdf I have this pump:https://www.ekwb.com/shop/ek-ddc-3-2-pwm-laing-ddc-3-2-pwm It is now wired like this: Going out to this: So ending up like this on the motherboard (sorry about it being dark): Now this motherboard supports doing this as it says in the manual: Which is what the specifications for that pump are, as listed on the site: Quote Technical Specifications: - Dimensions (W x D x H): 90 x 62 x 38 mm - Motor: Electronically commuted ball bearing motor- Rated voltage: 12 V DC- Power consumption: 18 W - Maximum head pressure: up to 5.2m - Maximum flow rate: up to 1000 L/h - Maximum liquid temperature: 60 °C - Materials: Stainless steel, PPS-GF40, EPDM O-rings, Aluminium oxide, hard coal - Power connector: 4-Pin Molex- and 4-Pin PWM FAN connector And in the manual, it says this: In the BIOS, I have these options: I've switched it to W_PUMP, and set it to PWM Mode, but when I do this, it is stuck at 100% speed at all times. In the manual, it says this: If I choose DC mode, it barely runs the pump at all (10-20% speed I guess). I can hear/feel it running, but it's so slow that my CPU gets up to 50-60C on idle. I want to control this pump with PWM, but it doesn't respond to any settings I give it in BIOS. What are these two different modes and why are they interacting with this pump in this way? † Christian Member † For my pertinent links to guides, reviews, and anything similar, go here, and look under the spoiler labeled such. A brief history of Unix and it's relation to OS X by Builder. Link to comment Share on other sites More sharing options... Link to post Share on other sites More sharing options...
Posted July 29, 2018 use PWM and put it on water pump mode DC mode reduces voltage from 12v at full load to vary the pumps power, while PWM mode turns the pump on and off to control its speed. PWM preferred for pumps because it keeps the torque of the pump high and speed control smooth, while DC mode will be like 'no speed at 30%, 50% speed at 50%', for example CPU: i7-2600K 4751MHz 1.44V (software) --> 1.47V at the back of the socket Motherboard: Asrock Z77 Extreme4 (BCLK: 103.3MHz) CPU Cooler: Noctua NH-D15 RAM: Adata XPG 2x8GB DDR3 (XMP: 2133MHz 10-11-11-30 CR2, custom: 2203MHz 10-11-10-26 CR1 tRFC:230 tREFI:14000) GPU: Asus GTX 1070 Dual (Super Jetstream vbios, +70(2025-2088MHz)/+400(8.8Gbps)) SSD: Samsung 840 Pro 256GB (main boot drive), Transcend SSD370 128GB PSU: Seasonic X-660 80+ Gold Case: Antec P110 Silent, 5 intakes 1 exhaust Monitor: AOC G2460PF 1080p 144Hz (150Hz max w/ DP, 121Hz max w/ HDMI) TN panel Keyboard: Logitech G610 Orion (Cherry MX Blue) with SteelSeries Apex M260 keycaps Mouse: BenQ Zowie FK1 Model: HP Omen 17 17-an110ca CPU: i7-8750H (0.125V core & cache, 50mV SA undervolt) GPU: GTX 1060 6GB Mobile (+80/+450, 1650MHz~1750MHz 0.78V~0.85V) RAM: 8+8GB DDR4-2400 18-17-17-39 2T Storage: HP EX920 1TB PCIe x4 M.2 SSD + Crucial MX500 1TB 2.5" SATA SSD, 128GB Toshiba PCIe x2 M.2 SSD (KBG30ZMV128G) gone cooking externally, 1TB Seagate 7200RPM 2.5" HDD (ST1000LM049-2GH172) left outside Monitor: 1080p 126Hz IPS G-sync Desktop benching: Cinebench R15 Single thread:168 Multi-thread: 833 SuperPi (v1.5 from Techpowerup, PI value output) 16K: 0.100s 1M: 8.255s 32M: 7m 45.93s Link to comment Share on other sites More sharing options... Link to post Share on other sites More sharing options...
Posted July 29, 2018 Author 8 minutes ago, Jurrunio said: use PWM and put it on water pump mode DC mode reduces voltage from 12v at full load to vary the pumps power, while PWM mode turns the pump on and off to control its speed. PWM preferred for pumps because it keeps the torque of the pump high and speed control smooth, while DC mode will be like 'no speed at 30%, 50% speed at 50%', for example Cool, so, my problem is that the two modes don't work as expected. PWM keeps the pump at 100% even when I set the performance curve. DC keeps the pump at 20-30% regardless of settings. † Christian Member † For my pertinent links to guides, reviews, and anything similar, go here, and look under the spoiler labeled such. A brief history of Unix and it's relation to OS X by Builder. Link to comment Share on other sites More sharing options... Link to post Share on other sites More sharing options...
Posted July 29, 2018 32 minutes ago, Vitalius said: Cool, so, my problem is that the two modes don't work as expected. PWM keeps the pump at 100% even when I set the performance curve. DC keeps the pump at 20-30% regardless of settings. Maybe a BIOS update will help? Asrock BIOS arent the best CPU: i7-2600K 4751MHz 1.44V (software) --> 1.47V at the back of the socket Motherboard: Asrock Z77 Extreme4 (BCLK: 103.3MHz) CPU Cooler: Noctua NH-D15 RAM: Adata XPG 2x8GB DDR3 (XMP: 2133MHz 10-11-11-30 CR2, custom: 2203MHz 10-11-10-26 CR1 tRFC:230 tREFI:14000) GPU: Asus GTX 1070 Dual (Super Jetstream vbios, +70(2025-2088MHz)/+400(8.8Gbps)) SSD: Samsung 840 Pro 256GB (main boot drive), Transcend SSD370 128GB PSU: Seasonic X-660 80+ Gold Case: Antec P110 Silent, 5 intakes 1 exhaust Monitor: AOC G2460PF 1080p 144Hz (150Hz max w/ DP, 121Hz max w/ HDMI) TN panel Keyboard: Logitech G610 Orion (Cherry MX Blue) with SteelSeries Apex M260 keycaps Mouse: BenQ Zowie FK1 Model: HP Omen 17 17-an110ca CPU: i7-8750H (0.125V core & cache, 50mV SA undervolt) GPU: GTX 1060 6GB Mobile (+80/+450, 1650MHz~1750MHz 0.78V~0.85V) RAM: 8+8GB DDR4-2400 18-17-17-39 2T Storage: HP EX920 1TB PCIe x4 M.2 SSD + Crucial MX500 1TB 2.5" SATA SSD, 128GB Toshiba PCIe x2 M.2 SSD (KBG30ZMV128G) gone cooking externally, 1TB Seagate 7200RPM 2.5" HDD (ST1000LM049-2GH172) left outside Monitor: 1080p 126Hz IPS G-sync Desktop benching: Cinebench R15 Single thread:168 Multi-thread: 833 SuperPi (v1.5 from Techpowerup, PI value output) 16K: 0.100s 1M: 8.255s 32M: 7m 45.93s Link to comment Share on other sites More sharing options... Link to post Share on other sites More sharing options...
Posted July 29, 2018 Author 11 minutes ago, Jurrunio said: Maybe a BIOS update will help? Asrock BIOS arent the best Fully updated. † Christian Member † For my pertinent links to guides, reviews, and anything similar, go here, and look under the spoiler labeled such. A brief history of Unix and it's relation to OS X by Builder. Link to comment Share on other sites More sharing options... Link to post Share on other sites More sharing options...
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