A buddy has a 22lb Cooler Master RC-692-KKN2 CM690 ($120) from 2012 and inside we found a Sabertooth Z77 (LGA 1155 Slot) system Mobo ($350). The Z77 is a proven Mobo c. 2012: a firm foundation for a budget upgrade, or whatever.
| CM RC-692 ($120)  | Sabertooth Z77 ($350)  | |
Corsair CMPSU-750TXv2 ($140)  |
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| Corsair CMPSU-750TXv2 Manual :: generic, no voltages, schematics, pinouts. | |
| Sabertooth Z77 Manual :: missing voltages for fans or the pinouts on board. |
ASUS Sabertooth Z77 (9:37) Linus Tech Tips, 2012. Full rundown plus some useful comments underneath
Using Cloud Storage (7:31) Wolfgang's Channel, 2019. Be sure to pick a provider that uses Xen or KVM, rather than OpenVz-based virtual machines.
ECC Memory considerations (9:47) Linus Tech Tips, 2021. ECC explained and shows the value of error checking in AMD vs. Intel, where it costs more.
baseline
Here's some of the other system features we started with. I got this info executing dmidecode, lshw, and smartctl -a /dev/sda (following# pacman -S smartmontools).
- CPU Intel i7-3770 3.4G clockable to 3.8 ($140)
LGA 1155 slot accepts newer i7-9700 or 10700, for roughly $300 or $400 respectively - BIOS AMI v.2104 8/13/2013
- cooling All are 12VDC. 5x 140mm ball bearing, 3 pin (Cooler Master A14025-10CB-3BN-F1) $20 each, 2 x 35mm auxiliaries (Sunon EF35101S2-Q010-G99).
- RAM - 16GB 1332MHz DDR3 synchronous SDRAM 240 pin (Corsair CMZ16GX3M4A1600C9 ~$140)array capacity is 32 GB. Currently 4 x 4GB sticks onboard. "Upgrade" to 32GB A-Tech RAM ~$140.
- GPU
- Storage 1 x Seagate Barracuda HDD IDE (not detected by BIOS), 1 x SanDisk SDSSDHP256G in ATA mode on SATA 3. These are laptop SSD's. (~$120 used)Capacity: 2 x SATA3 and 4 x SATA2
- Power Corsair CMPSU-750TXv2. No problems ($140)
- Optical
first inspection
Dust is too prevalent inside and the fans are worn. Several unfiltered openings. The previous owner wired the fans undirected with air from the bottom, exiting top. The dust should be solved, and one might also seek a lighter box, eg the Q500L Midtower (magnetic filter).
fans - motherboard (9)
The motherboard seems to have 5 x 12VDC directed fans, 1 x undirected (3-pin) 12vdc fan, and 1 directed CPU fan.
We also have these oddballs:
- Sunon EF35101S2-Q010-G99 x 2. Location: motherboard. These are both 35 mm MoBo 3-pin (unmanaged) "Assistant Fans", 12vdc (pg 2-33/35 manual below). Apparently the fitting can take up to 40 mm. The Motherboard Manual provided no pinout voltages, so that there was no way to determine if 5VDC or 12VDC without a teardown. The diagram isn't clear if these are installed as 35 or 40mm, but found the 35's installed and measured they will take up to 40mm.
The Sabertooth has a fan controller, the AI Suite II. However, this is somehow a software controller from Windoze. If not running Windoze, we might want an independent fan controller. Check out the one in the video below.
Fan types (17:32) Jayz Two Cents, 2020. Other information about hydraulic, mag-lev, and ball bearings. Hydraulic is more susceptible to dust.
The EZDIY-FAB 5 pack (5 VDC - use SATA connector) is a good $50 120mm horizontal (they are hydraulic) solution
fans - case fittings (7)
As noted above, the case has too many unfiltered openings, so that filters or jerry-rig pantyhose must be installed. These are the 5 listed in the case manual...
... and I found these two additional (undocumented) locations.
- side panel directly beneath CPU. space for 1 x 70mm 3-pin 12vdc fan. This would blow directly onto the bottom of the CPU.
- front 1 x 140mm currently blowing into the case. This appears controlled.
temp sensors
To understand the fan settings, we need temperature information.
S/PDIF
I noticed this was entirely disconnected, even to my GPU or Optical Drive. Seeking information, I learned that I was not alone. It seems the best is to get a small case outlet that sends it to an RCA jack if one is going to exploit it.
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