I bought a HP desktop computer with an AMD Ryzen 5 4600G CPU. The computer reboots or locks up, mostly when the apartment’s air conditioning goes on or off, or sometimes when I hear the neighbor’s air conditioning go off. It isn’t the version of operating system, nor the applications I’m running at the time. The power supply doesn’t give steady power to the computer when the line power fluctuates (too little voltage difference, or too short a time, for a good Uninterruptible Power Supply to take over).
HP Pavilion Gaming Desktop PC TG01-1070m CTO Product 3G825AV, with Ryzen 5 4600G CPU with internal graphics.
Erica3 motherboard, Customized (meaning not standard ATX): 29.09 x 20.3 cm (11.45 x 7.99 in), Chipset B550A
Erica motherboards (all? Certainly Erica 3) have non-standard power connectors, so as far as I can tell, only Delta Electronics makes a power supply for it.
Erica motherboards (all? Certainly Erica 3) have front-case connectors soldered on the motherboard (USB, power, headset) so probably won’t work with standard cases, maybe only HP’s case.
See Choosing the Best Motherboard for AMD’s Ryzen 5 4600G – TechReviewer, which says:
For AMD’s Zen 2-based Ryzen 5 4600G processor, you’ll need a motherboard with an AM4 socket and a compatible chipset.
Ryzen 4000-series CPUs, which includes the Ryzen 5 4600G, are compatible with all 400 and 500-series consumer chipsets. Supported chipsets include the X570, B550, A520, X470, and B450.
The X570 is our recommended chipset for the Ryzen 5 4600G CPU, as it provides the most functionality and the ability to upgrade to a newer AM4 CPU in the future.
Note: Make sure that your motherboard also has a video output port (e.g., HDMI) if you want to use the integrated graphics in the Ryzen 5 4600G CPU.
Other options?
Buy a recommended motherboard, that uses ATX-standard power connectors.
Buy a top brand power supply, e.g. Thermaltake, Corsair, Seasonic. See Top PSU picks for gaming and more | Windows Central for several excellent power supplies, and what to look for in a power supply.
Buy a new case, with the power supply and motherboard installed (so you know they fit each other).
Move your CPU, RAM, M.2 SSD, other drives, WiFi/Bluetooth card, everything else you can, to your new case + motherboard.
While you are moving the CPU, replace the heat transfer thermal grease between the CPU and the CPU Fan. I talk about this on Computer Slow? Check “Thermal Protection Mode”, and Fix It Fast. Yeah, we’re supposed to replace that every year or so!
Erica Motherboard Use Non-Standard Power Supplies
It has an Erica 3 motherboard, which uses non-standard power connectors, and non-standard port connectors.
The Delta Electronics power supply, with custom connectors for this non-standard motherboard, does not give stable power. It outputs power that fluctuates when the input power fluctuates. The motherboard protects the computer by locking up or rebooting.
Is it the power supply design? Is it getting worse over time, and now it’s defective? I don’t know. I don’t care.
Power Supply
These Erica motherboards are super proprietary – the one I had was like mATX height but double length as the front panel connectors were physically built onto the board. (a normal mATX or board will be taller than it is wide, not the opposite).
The issue here isn’t the motherboard – it’s the PSU. These HP use a weird 10 pin power supply to the motherboard. A normal aftermarket motherboard doesn’t support this standard.
My Specific Model Computer
HP Pavilion Gaming Desktop PC TG01-1070m CTO
Erica3 motherboard, HP model: 87D6
Customized: 29.09 x 20.3 cm (11.45 x 7.99 in)
Chipset B550A
front case ports are soldered to the motherboard (so the case has to match exactly)Low Voltage House Power and Computers
I think this computer’s power supply has unusually low “hold-up time”, despite being rated “80 Plus Certified”.
original power supply Delta Electronics
HP P/N L76557-003
DPS-400AB-43 A rev 0C
(all quick hand measurements, definitely not precise)
Power supply is 6-3/8″ x 2-5/8″ x 3-3/4″, mounted to case with 4 screws on power switch side
SysPwr 14″ 360mm (approx) 4-pin Molex square with beveled pin plastic so only fit proper orientation, labeled on motherboard “SYS_PWR P1”
2x CPU Pwr 26″ 660mm 4-pin Molex square with beveled pin plastic so only fit proper orientation, labeled on motherboard “CPU_PWR” (only 1 used)
6+2 or 8-pin PCIe 12″ 305mm (unused, for graphics card, but many graphics cards need two of these)
7-pin labeled on motherboard “P2 PWRCMD” only pins 7,5,4 used
may be a “7 pin 6 wire connector” going into the motherboard labeled PWR CMD. See https://www.techpowerup.com/forums/threads/power-supply-psu-pwr-cmd-help.273208/ “JST connector with a PH/2.0 mm spacing”, so what looks like 7 pins from the top is probably 6 pins with one filled hole.
12.1V Main 18A
12.1V CPU1 18A
12.1V G1 18A
80 PLUS® Certified Power Supplies and Manufacturers | CLEAResult
search by model DPS-400AB-43, manufacturer listed as “HP, Inc.”
https://www.clearesult.com/80plus/sites/80plus/files/manufacturer-certificate/HP%2C%20INC._DPS-400AB-43_400W_SOCE%205861_Report.pdf
ID 5861, Year 2019, Type: OTHER
TYPICAL EFFICIENCY (50% Load): 91.40%
AVERAGE EFFICIENCY : 90.36%
https://fccid.io/RR-DVP-DPS-400AB-43A
https://www.datasheets.com/en/search?q=DPS-400AB-43
searched for pinout by Erica3 motherboard and by part number DPS-400AB-43, found Nothing. Not listed by DPS-400AB-43 on Delta Electronics site.
Measure the voltage with a volt meter, maybe it’s standard and a simple adapter will work for the PWRCMD.
Since the motherboard and power supply are non-standard, you Have to measure Every connector’s every pin, to make sure it is compatible with standard ATX power supplies.
Yuck!
Better answer: buy a new case + power supply + motherboard, making sure the motherboard works with your existing CPU (and a few newer more powerful CPUs too). Make sure the power supply is a top brand, such as Thermaltake, Corsair, Seasonic. Transfer your CPU, RAM, SSD, other drives, WiFi card, etc.
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