Best RAM for a home server running multiple virtual machines?

In my experience, when you're building a 24/7 home server, you really gotta weigh the "cool factor" of speed against the actual safety of your data. I've been running Proxmox labs for over a decade now, and honestly, stability is the only thing that matters when ur trying to sleep at night while ur server is humming in the closet.

Here's how I'd break down ur options from a safety-first perspective:

1. Crucial 64GB Kit (2 x 32GB) DDR4-3200 PC4-25600 CL22 DR x8 Unbuffered ECC DIMM 288-Pin Memory CT2K32G4WFD832A: This is the gold standard for a "prosumer" home server. If ur motherboard supports unbuffered ECC, get this. It’s 3200MHz which is plenty fast, but the Error Correction Code is literally a lifesaver for long-term uptime. I had a stick go bad once and the ECC caught the single-bit errors before they corrupted my entire Linux filesystem. It's so worth the peace of mind.

2. Kingston FURY Renegade DDR4 64GB (2x32GB) 3200MHz CL16 Desktop Memory KF432C16RB1K2/64: If ur board doesnt support ECC, go with this instead. It’s built with high-quality chips and focused on reliability over extreme overclocking.

3. Basically, stay away from 3600MHz+ kits for a server. The marginal speed boost is like, totally invisible in a VM environment, but the higher voltage and heat can lead to crashes after a few weeks of 24/7 operation.

So yeah, prioritize ECC if u can swing it, otherwise stick to 3200MHz from a reputable brand like Crucial or Kingston. Stability > Speed every single time for a hypervisor!! gl with the build!

> I’m torn between going for sheer capacity or focusing on higher speeds and lower latency.

sooo i've been running a pretty similar proxmox setup for about two years now and honestly, i'm super satisfied with sticking to consumer-grade gear. basically, when you're juggling a windows vm and plex alongside several linux distros, you're gonna hit a capacity wall way before you ever notice the difference between 3200mhz and 3600mhz. i mean, in a home lab, stability is the real goal, right?

i think for your $200-$250 budget, you should definitely aim for 64gb and maybe even look at 128gb if you find a deal. i wouldn't sweat the ecc unless you're doing high-stakes data stuff; for plex and coding, it's lowkey overkill. plus, ecc-compatible boards and chips can be a headache to match up correctly. i’ve had zero complaints using G.Skill Ripjaws V 64GB (2 x 32GB) DDR4-3200 CL16 kits. they're super reliable for 24/7 uptime and usually leave you with enough cash left over for other parts.

if you want to maximize value, the TeamGroup T-Force Vulcan Z 64GB (2 x 32GB) DDR4-3200 is another solid pick that works well. i've used them in a few builds and they just... work. honestly, just grab a reputable 3200mhz kit with a decent cl16 rating and you'll be set. iirc, i paid way less than your budget for my current setup and it’s been rock solid. gl with the build!! 👍

Sooo I've been running home labs for a long time and honestly, I always lean towards the cautious side when it comes to 24/7 uptime. For your situation, I'd suggest focusing on stability and brand reputation rather than chasing those high 3600MHz frequencies. In a virtualized environment like Proxmox, you're rarely gonna feel the difference between 3200 and 3600, but you WILL feel a system crash at 3 AM because your consumer RAM couldn't handle the heat or timing stress.

Since you're on a $200-$250 budget and need DDR4, I'd look at brands that have a heavy presence in the workstation market. While others mentioned the flashy stuff, I've had incredible luck with the Kingston FURY Renegade DDR4 64GB (2x32GB) 3200MHz CL16 kits. Kingston's validation process is legendary for compatibility. Another rock-solid option if you want to avoid the "gamer" tax but get professional-grade reliability is the Crucial RAM 64GB Kit (2x32GB) DDR4 3200MHz CL22 CT2K32G4DFD832A. It's not pretty, but it just WORKS.

Regarding ECC... it's a rabbit hole. If your motherboard and CPU actually support unbuffered ECC, it's a nice safety net, but for a home Plex/Linux lab? Regular high-quality sticks are fine as long as you aren't doing mission-critical financial transactions.

TL;DR: Prioritize 64GB capacity at a stable 3200MHz. Brands like Crucial or Kingston are generally more conservative with timings which leads to better 24/7 stability in my experience. gl with the build!

sooo I've been down this rabbit hole before and honestly, capacity is KING when you're juggling that many VMs. For your situation, I would suggest prioritizing total RAM over speed or even ECC if you're on a budget. Unfortunately, I had issues with system instability when I tried mixing different kits, so definitely buy a matched set.

In my experience, 3200MHz vs 3600MHz doesn't really matter for a home server... Proxmox basically won't care about that 400MHz difference, but it WILL complain if you run out of overhead. If your board supports it, getting a Crucial RAM 64GB Kit (2x32GB) DDR4 3200MHz CL22 (or 2666MHz) Desktop Memory CT2K32G4DFD8266 is a solid, stable choice for 24/7 uptime.

Quick tips:
- Stick with 3200MHz; the extra cost for 3600MHz is NOT worth it for a hypervisor.
- Maximize your slots now so you don't have to throw away sticks later when you want 128GB.

I tried Corsair Vengeance LPX 64GB (2x32GB) DDR4 3600 (PC4-28800) C18 CMK64GX4M2D3600C18 and it was fine, but honestly, standard JEDEC timings are safer for long-term stability. ECC is great if your CPU actually supports it (like some Ryzens or Xeons), but for a first build? Standard sticks are basically fine. gl with the build!! 👍