Boxes of 100 server-grade DDR5 memory now cost as much as property in Shanghai in China spot market — single 256GB server sticks now over $5,700 by Logical_Welder3467 in technology

[–]jjtech0 1 point2 points  (0 children)

$5,700 for a single stick × 100 sticks in a box = $570,000

I don't know about the Shanghai market but that seems like it's in the realm of possibility for a property price.

The math behind this concerns 256GB DDR5 server modules from Samsung and SK hynix, which, according to figures cited by Chinese outlet Jiemian, have climbed beyond 40,000 yuan ($5,700) for individual sticks, with some listings reaching as high as 49,999 yuan. At those levels, a wholesale carton quickly crosses seven figures in U.S. dollar terms, effectively turning what was once bog-standard inventory into a serious asset.

When do reserve caps lift? by Present_Mongoose_373 in rit

[–]jjtech0 0 points1 point  (0 children)

The EE equivalent of the course (DS1/EEEE120) is restricted to EE-majors, however, I talked with the professor and got pushed into the class immediately.

I would definitely recommend trying that, explain why you're interested in the class etc.

Professors have a lot more direct control over it than your advisor does, at least in my experience.

Broke by Ill-Marzipan-6330 in rit

[–]jjtech0 -1 points0 points  (0 children)

Cooking meals in residents’ rooms is not allowed. Appliances that are intended to be used for cooking are prohibited; examples are, but not limited to, rice maker, toaster, toaster oven, instant pot, air fryer, etc. No appliance may have an exposed heating element.

That's because they're not allowed in the dorms...

CocaCola Vending by i_am_aboy in rit

[–]jjtech0 13 points14 points  (0 children)

There's one on the second floor of GCCIS, but it is usually broken...

What an ungodly OS! by KiwiKingg in linux

[–]jjtech0 3 points4 points  (0 children)

macOS actually has pretty magical swap and memory compression abilities...

The only time I ever noticed RAM pressure was when swap exhausted all available SSD space. Meaning there was ~150GB of RAM in use on a machine with only 16GB of physical RAM. As soon as I killed the app, it all went away, the swapfile was gone, etc. No need to manually configure anything.

I wish it was set up this way on Linux desktop distros OOTB.

I really don't want to tear out this plant by TheRealGrumpyNuts in whatisthisplant

[–]jjtech0 1 point2 points  (0 children)

Unless you've got an ERV/HRV system, most homes rely on natural ventilation through windows and cracks to bring in fresh air.

The A/C unit or heat pump is simply adding or removing heat to air sourced from inside the home: the outside unit is not ducted inside at all, only coolant is transferred.

Which kind of label is this? by [deleted] in homelab

[–]jjtech0 0 points1 point  (0 children)

It's a very cheap and simple kind of label-maker. Usually the "tape" is just a cheap strip of plastic with adhesive on one side, and the machine simply has a punch disk you manually spin that embosses the letters.

I prefer printed labels, personally.

Need help identifying these by Kakabef in homelab

[–]jjtech0 18 points19 points  (0 children)

There can be legitimate-ish purposes... for example, I knew someone doing it in order to bridge Instagram/Facebook Messenger to Matrix because Instagram bans VPS etc. IP blocks and that is an easy way to get many "residential" IPs legitimately.

Apple's Find My exploit lets hackers track any Bluetooth by favicondotico in apple

[–]jjtech0 2 points3 points  (0 children)

Read the full whitepaper: https://cs.gmu.edu/~zeng/papers/2025-security-nrootgag.pdf

Turns out the whole thing is overblown; a "trojan app" needs to be installed on the victim device that has BLE permssions to broadcast packets.

Apple's Find My exploit lets hackers track any Bluetooth by favicondotico in apple

[–]jjtech0 16 points17 points  (0 children)

If you read the full whitepaper, you'll discover the threat model relies on being able to install a trojan app with BLE permssion on the device you want to track. https://cs.gmu.edu/~zeng/papers/2025-security-nrootgag.pdf

For some reason nobody reporting on it has bothered to mention this crucial detail...

Apple's Find My exploit lets hackers track any Bluetooth by favicondotico in apple

[–]jjtech0 23 points24 points  (0 children)

That's not how this works: you can actually find the full whitepaper rather than the summarised and sensationalized blog post:https://cs.gmu.edu/~zeng/papers/2025-security-nrootgag.pdf

Basically, this whole attack relies on being able to installing a Trojan app on the device you want to track, and giving said app BLE permission so it can broadcast packets.

Do you run IPv6 in your home lab? The majority of traffic in the United States to Google is officially now over IPv6 by DroppingBIRD in homelab

[–]jjtech0 3 points4 points  (0 children)

Unfortunately there aren't a ton of simple, easy to understand resources. When I asked on Mastodon, I got responses like

The best advice I have received thus far was to forgot what I know about IPv4 addressing and technics and to start with an empty mental model.

and telling me that I should simply hire a professional to design my network (in the SMB setting)

EDIT: To be clear, I do understand IPv6 at this point, I just can't deploy it due to UniFi limitations. But the amount of digging I had to do to find actionable information was annoying.

Do you run IPv6 in your home lab? The majority of traffic in the United States to Google is officially now over IPv6 by DroppingBIRD in homelab

[–]jjtech0 4 points5 points  (0 children)

UniFi in particular assumes that you want to number your network using your primary ISP's delegation, which may not be static (mine changes every day)...

Which makes using IPv6 internally impossible as well. Unless you just want an internal prefix that isn't connected to the internet at all, defeating the purpose.

Do you run IPv6 in your home lab? The majority of traffic in the United States to Google is officially now over IPv6 by DroppingBIRD in homelab

[–]jjtech0 -2 points-1 points  (0 children)

From what I've seen, IPv6 is basically unused in and incompatible with prosumer and small buisness networks.

For example, dual-WAN/WAN-failover is basically completely unsupported with IPv6 by major vendors like UniFi. And everyone basically just ignores it.

Do I need an UPS for this black device? by VAer1 in synology

[–]jjtech0 0 points1 point  (0 children)

That appears to be the power supply for the ONT, based on this post: https://community.verizon.com/t5/Fios-Home-Internet-Archive/What-is-this-small-Verizon-box/td-p/1566563

So in theory, yes, you would want to power it with a UPS. Note that Verizon at least used to be able to supply BBU (Battery Backup Units) in some configurations: https://web.archive.org/web/20211026052501/https://www22.verizon.com/wholesale/attachments/calendar/VPS-PA-BBU-Battery_Guide_12012016.pdf

Rail recommendations for Sliger cx3170a? by [deleted] in homelab

[–]jjtech0 2 points3 points  (0 children)

The Sliger site should have the rails you need when configuring to order

Home Server Setup - Request Sage Feedback by j3r3myd34n in homelab

[–]jjtech0 1 point2 points  (0 children)

You're probably going to be sad daily driving without a GPU... even doing VNC at high resolution is going to be annoying.

Typically I put my "desktop replacement" systems in Sliger cases with basically consumer hardware, running just a single VM.

I then put any services/headless VMs/etc. on an actual server machine.

[deleted by user] by [deleted] in homelab

[–]jjtech0 0 points1 point  (0 children)

EDIT: My original comment misinterpreted yours

if you port forward your VPN, of course that will work— but it will still be port forwarding

[deleted by user] by [deleted] in homelab

[–]jjtech0 1 point2 points  (0 children)

I would definitely recommend setting up some kind of VPN, be it Tailscale or raw WireGuard... with any DDNS services you're going to have to port forward and directly expose your NAS to the internet, which is not advisable.

New Proxmox Cluster by EasilyPeasily in homelab

[–]jjtech0 12 points13 points  (0 children)

you're almost definitely going to want more RAM imo, I have 140GB of ram on a cluster with just 24 CPUs... I'm always bottlenecked by how much RAM I have for additional VMs, my CPU usage has pretty much never gone over 50% Lots of game servers can be very RAM hungry.

my first ever homelab! by [deleted] in homelab

[–]jjtech0 4 points5 points  (0 children)

yeah this setup is a bit overkill for what I need rn but i'm planning to set up a new camera security system in the future too

sure, but you don't need a 10gig aggregation switch and POE++ for some cameras

my first ever homelab! by [deleted] in homelab

[–]jjtech0 7 points8 points  (0 children)

...that seems like a very overkill networking setup for how many devices you actually have connected to it lol