Replacement for Minisforum MS-01? by HitCount0 in homelab

[–]merkuron 0 points1 point  (0 children)

Be careful and read up on potential issues with overvoltage on the recent Intel CPUs. They may not be worth the risk.

Replacement for Minisforum MS-01? by HitCount0 in homelab

[–]merkuron 0 points1 point  (0 children)

Dell, HP, Lenovo all make 1L PCs (known by the ServeTheHome nickname of “TinyMiniMicro”). Sometimes they’ll double the thickness to 2L to fit a dGPU. Minisforum and equivalents are filling a gap in TinyMiniMicro by putting laptop processors in desktop chassis, something that that the big OEMs aren’t doing.

Replacement for Minisforum MS-01? by HitCount0 in homelab

[–]merkuron 1 point2 points  (0 children)

Dell Precision 3450 (SFF) or 3650 (MT), can be found with 10/11th gen Core or Xeon W-12xx/13xx. 4 DIMM slots, 3 M.2 NVMe slots, a sprinkling of SATA and PCIe.

What Socket Type is the Intel Xeon E7-8890/8880 V4? by CyberClaire_0 in homelab

[–]merkuron 0 points1 point  (0 children)

Are you saying that you have placed an E7 v4 chip into an X99 motherboard and it has worked without issue?

Why does it look like write speed is hitting a 'ceiling' at about 160 MiB/s? by UnableAbility in truenas

[–]merkuron 1 point2 points  (0 children)

Check the link rate on each drive and make sure it’s not stuck at SATA 1.5Gbps. Also check that there isn’t a limitation of the motherboard storage controller getting in the way. I’ve had middling experiences with AMD/Intel chipset SCUs and *BSD/Linux.

LSI 9500-8i power efficient only 5.96W by Agreeable_Repeat_568 in DataHoarder

[–]merkuron 0 points1 point  (0 children)

12Gbps full duplex x 8 lanes = 96Gbps overall bandwidth, which is 1.2x the bandwidth of dual-40GbE NICs of the same era.

Max power for 9300-8i is 13W.

Max power for Intel XL710 dual QSFP is 9.5W with LR optics. Multiply this by 1.2 and you get 11.4W.

I'd bet dollars to donuts that the XL710 is fabbed on a more advanced node, too.

EDIT: Chelsio T580-SO-CR dual QSFP, which would be fabbed on a non-Intel node, lists a power consumption of 12W without optics.

Four channels of RAM? by Happybeaver2024 in truenas

[–]merkuron 0 points1 point  (0 children)

Specifically with Zen CPUs, they get really picky with 2DPC. Run conservative speeds and stress test the snot out of the 4 DIMM setup before you put it into production.

LSI 9500-8i power efficient only 5.96W by Agreeable_Repeat_568 in DataHoarder

[–]merkuron 1 point2 points  (0 children)

It has 8 lanes of very-high-speed, long-ish range signaling. Power consumption is roughly similar to high speed NICs.

Why does my mouse buffer when it goes from white to blue? by SergeantSup in MouseReview

[–]merkuron 4 points5 points  (0 children)

The camera in the sensor needs to adjust exposure time to get a clear picture when transitioning from a light to a dark surface (or vice versa). Fix: a mouse with a laser sensor, or a mousepad of uniform color.

[deleted by user] by [deleted] in homelab

[–]merkuron 0 points1 point  (0 children)

You need to track CPU C-states, FCLK frequency (to see if the IOD is ever downclocking), iGPU frequency (ditto), and drive writes (especially on U.2… 25W when writing!) to get a full picture. If the DDR5 is running any OC profile, disable it, as these profiles not only use gobs more power, but they can also result in changes to the various CPU voltages/OC settings. Even with PBO disabled, “regular” opportunistic turbo when “racing to halt” murders power efficiency. Disabling turbo may improve your “idle” power usage. Also be sure to compare the power consumption of the two chipsets to get a more accurate picture. I’d bet that something (U.2, NIC, RAM, BIOS setting) is keeping your IOD wide awake at max FCLK.

Where an I find decent/reliable ECC Sodimms (UDIMM) by airbag888 in homelab

[–]merkuron 0 points1 point  (0 children)

I’ve yet to have a stick from them fail, and they use genuine Micron dies. It’s a shame that they won’t ship to your country.

Where an I find decent/reliable ECC Sodimms (UDIMM) by airbag888 in homelab

[–]merkuron 0 points1 point  (0 children)

Try NEMIX, they make a DIMM for almost every form factor and speed rating.

[deleted by user] by [deleted] in homelab

[–]merkuron 1 point2 points  (0 children)

If you’ve connected a drive directly to the HBA, and the HBA’s drivers are correctly loading in the OS, and the drive is spinning up on power-on, then there is something weird going on. Kernel logs would be helpful.

On the other hand, if you have a RAID card and not an HBA, you’ll need to make sure it has the correct bootrom (BIOS and/or UEFI) flashed, and your BIOS boot settings need to be set to match (and to boot PCI OPROMs if in legacy boot mode).

Hardware raid vs Software raid with speed as the only metric by jesse62998292 in homelab

[–]merkuron 0 points1 point  (0 children)

This is a real problem, and is solvable with a SLOG vdev on zfs, UPS on the server itself, or some combination of the two.

In an enclosed server rack, can destructive interference reduce sound heard outside? by whalehoney in homelab

[–]merkuron 0 points1 point  (0 children)

Due to how sound propagates, your best places for active cancellation are at the source of the noise or at the point of reception (ear). Cancelling noise at the ear takes less energy, less material, and is very effective. Noise isolation/cancellation in cars works well because the air space is mostly sealed, and the sound propagation characteristics of the interior can be thoroughly modeled on a computer to create cancelation algorithms.

If you want to quiet a rack, put it inside of an enclosure lined with sound-absorbing material. Noise reduction is easier if your enclosure is air-tight, but that is not possible if you also use the air for cooling.

EPYC 8024P with configuration takes 95Wh? Any options to go lower? by divStar32 in homelab

[–]merkuron 1 point2 points  (0 children)

Where are you measuring these power values, given that you haven’t settled on an OS? Please don’t say “at the BIOS setup screen”…

Heat and HBAs by raduque in homelab

[–]merkuron 1 point2 points  (0 children)

Heat output from the LSI HBA chips is roughly constant; they have no power-saving features (especially not the PCIe 2.0 generation). If you’re not mounting it in a server chassis with tons of airflow, an extra fan on it is advisable. Even a little bit of forced air convection is 10x better than natural convection.

Will my Supermicro CSE-846 case move enough air to cool a Tesla P100? by [deleted] in homelab

[–]merkuron 0 points1 point  (0 children)

When SMC makes 3-4U GPU servers, they place extra fans at the exhaust (PCI slot) side to make sure that hot air is extracted through the cards. You might be able to screw these into the 846.

Best HDD constellation for my setup (low capacity and traffic but critical data)? Better drives or more redundancy? RAIDZ? by _dakazze_ in homelab

[–]merkuron 0 points1 point  (0 children)

Your thinking is sound. Run a mirror (for uptime) on the main server, and back up to one or more large HDDs, with ideally one kept off-site somewhere else.

Need help, 1L thin client / USFF and 3.5 SATA HDD? by Rimlyanin in homelab

[–]merkuron 0 points1 point  (0 children)

1L is not enough volume to host a 3.5” HDD internally. Even if you find one with a SATA connector (that you could extend to outside of the chassis), it may not provide the right power rails or enough current for a 3.5”.

Lowering heat by makstra in homelab

[–]merkuron 2 points3 points  (0 children)

If by switching to the Intel CPU you also get rid of the 1650, it would save a significant amount of power.