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2:21 AM
Is it to be expected that a 4K monitor displays more choppy than a 1080p if they both have same refresh rate?
For video playback that contains fast motion
By choppy I mean more horizontal lines
 
2:54 AM
Seems more like the decoder cannot keep up
 
 
9 hours later…
12:00 PM
Good. That took a bit longer than expected. That said, it (mostly) only works with the professional-level Olympus cameras. (I have an E-M1 Mark III, but... that's expensive as heck.)
I might try this out when I get a chance :p
The point is to be able to use the camera you already have as a webcam.
 
12:18 PM
@bwDraco I think Canon did the same?
but yeah, I think it's more than welcome
webcams market have been stagnant and no major improvement on that when DSLR cameras are killing it for streaming
you could get a C920 or a Logitech Brio but a decent camera is even better
The C920 is almost a 9 year old webcam (Jan 2012) and some people still buy it today because there is no more competitive product on the 50$ market range
 
12:53 PM
@CaldeiraG People try to buy it today
early in pandemic you couldn't get webcams for all the 2017 bitcoin in the world
not sure how it is now tho
well, it's in stock on Amazon
currently sitting at 90 of our UK Tea and Crumpet Pounds
I have one for streaming VR and it's great, 90 quid is tad dear tho
 
1:13 PM
@bertieb that's right
@bertieb it used to be cheaper at some point
90 quid is almost release price
 
1:25 PM
Aye
Gouging Supply and demand
Courtesy of CamelCamelCamel
ie more expensive than it's ever been
 
 
2 hours later…
3:07 PM
I'm putting together a PC. The motherboard supports 2 CPU's, but I'd like to only use 1.
There are 2 connections for CPU power, they are *Not* labeled 'cpu 1' and 'cpu 2' however
How do I know which one to plug the PSU-CPU 4 pin cable into?
 
@dustytrash What does the motherboard manual say?
 
The quick installation guide has them labeled as 'ATX12V1' and 'ATX12V2'. I'll look up a manual
The manual doesn't say, it just says there are 2 connectors
 
@bertieb oof
@bertieb thanks for that :)
 
3:36 PM
I'm assuming the 2 power connectors are for the 2 CPUs.
But looking into it, some 1 CPU boards have 2 connectors, so maybe I'm wrong
 
3:59 PM
I think I'm going to try plugging into ATX12V1 and leave ATX12V2 out. I don't have a second 8 pin cable anyways (although my PSU came with a slot for it, not the cable)
 
@dustytrash What motherboard?
@dustytrash On a dual-socket board, it's likely each processor has its own power input. If only one socket is populated, your system will not work if you're not using the correct power connector.
Are you sure you're populating the correct processor socket?
 
@bwDraco It's a 'EP2C612D16C-4L', ASRock
 
ASRock Rack. Huh.
 
No, I don't know if 'V1' corresponds to CPU1 and V2 to CPU2
The manual does not specify
 
This takes Haswell-EP and Broadwell-EP processors (Xeon E5 v3 and v4).
 
4:10 PM
I have two Xeon processors. However I'd like to only use 1 for now
It's in CPU2 slot
 
If you're running Windows, you need to be using Windows 10 Pro. Windows 10 Home does not support multiple sockets.
@dustytrash That configuration will not work. Place the processor into the first socket.
 
@bwDraco if I move the cpu to CPU1 which CPU power slot would I use? Theirs 2, identical 8 pin slots. 'ATX12V1' and 'ATX12V2'
 
Use ATX12V1.
(Windows 10 Pro supports two sockets; Windows 10 Pro for Workstations supports four sockets.)
Memory must be installed in the slots adjacent to the first socket.
Also, ensure you're using ECC memory. While normal desktop DDR4 will likely work, these server processors are designed to be used with high-reliability ECC memory.
(Registered and load-reduced memory can also be used as this is a server board.)
 
@bwDraco Where does it say the RAM should be adjacent? Or is that for all motherboards?
 
4:26 PM
Not necessarily directly adjacent. I meant you can't use the memory slots for the other socket without a processor installed in that socket.
Be sure to evenly populate all four memory channels.
 
What are the memory channels? Their are 4 groups of 4. Each has a combination of Blue and White slots
If I'm only using 1 CPU, should I evenly populate 2 memory channels?
 
Populate all the blue slots near CPU socket 1.
 
Is it bad if I don't populate all of them? I don't have enough RAM sticks
I only have 2 sticks. Am planning on buying more once I know everything works
 
4:46 PM
Hmm. It'll work but you won't get optimal performance.
Is the processor Xeon v3 or v4?
 
They are both V3
 
Are they identical?
 
Yes both the same
 
5:01 PM
Use these modules instead. You'll need one set for each processor.
 
@bwDraco "Not for Desktop PC/Laptop/Notebook"!?
 
@DavidPostill We're talking about a dual-socket server board.
 
 
2 hours later…
6:45 PM
You can likely get cheaper RAM on eBay from decomm'd servers, FWIW
 
The best supported memory is DDR4-2133. It should be ECC and (preferably) registered or load-reduced.
 
tho none of those are strictly necessary
I'd say go with what budget and requirements need
 
7:10 PM
(as an aside, the board technically accepts DDR4-2400 but Xeon E5 v4 processors are required to reach this speed)
@dustytrash What model processors, specifically?
And what are you planning to do with this server board?
 
@bwDraco I have Xeon E5-2620 V3 SR207
 
Hmm. You'll have 12 cores and 24 threads if you install both processors.
 
I'll be running VM's for development. I wanted two CPU's and 2 SSD's so I can designate one for the host
Is that a bad thing?
 
VMs... yeah, you're going to want a fair bit of memory. That said, do you expect to need 128 GB of RAM (which is what you'll get if you get two sets of the memory linked)?
Bear in mind you don't want things to span NUMA nodes. If you're intending to run VMs on one specific processor, you're only going to have 64 GB of memory directly accessible to each processor this way.
 
Yeah I was planning on 128GB memory originally. I have 64GB in my current machine, but unfortunately it's not compatible (DDR3).
What are NUMA nodes?
 
7:17 PM
Each processor must have its own memory. They can access memory from the other processor, but at a substantial performance penalty.
 
64GB per processor is fine for what I'm doing
 
@dustytrash Non-uniform memory access is basically when you have processors (or in some cases, sets of processor cores) that can access all the memory on the machine, but not all at the same latency; memory attached to a different processor is slower to access than memory attached to the processor from which the access is made.
Any system with multiple sockets will be a NUMA system.
Non-uniform memory access (NUMA) is a computer memory design used in multiprocessing, where the memory access time depends on the memory location relative to the processor. Under NUMA, a processor can access its own local memory faster than non-local memory (memory local to another processor or memory shared between processors). The benefits of NUMA are limited to particular workloads, notably on servers where the data is often associated strongly with certain tasks or users.NUMA architectures logically follow in scaling from symmetric multiprocessing (SMP) architectures. They were develope...
 
Okay that makes sense
 
In the setup you propose, each processor will have 64 GB of memory directly connected to it, and can access that memory without additional delay. It can access memory attached to the other processor, but doing that takes longer. Most major operating systems support this type of setup and try to keep applications running on a given socket on the memory attached to that socket.
Have you considered Ryzen 9 or Ryzen Threadripper instead? I suppose you're using old server gear because it's cheaper...
(if you need even higher core counts with two sockets, there's EPYC, but that's probably well in excess of your requirements)
Hmm. The processors don't even support DDR4-2133, only 1866. I'd suppose those modules will work, only at the slower speed.
 
7:33 PM
I only bought this one because it's cheaper
I can't return it unfortunately. I'd go with a different motherboard otherwise
 
Ya. Again, that's the memory I'd suggest getting.
amazon.com/dp/B07X21M7S8 (substantially the same price, but a single set of eight modules; with both processors installed, populate all eight blue slots)
 
 
4 hours later…
11:50 PM
Bear in mind this is a server board and can accept huge amounts of memory. If for any reason you need more RAM, up to 768 GB is supported with the processors you have; there are 64 GB and even 128 GB memory modules that are designed specifically for server use, but they're extremely expensive.
This configuration still leaves eight more memory slots.
(8x64 GB + 8x32 GB will get you to 768 GB)
(currently, many 32 GB modules and all 64 GB and larger modules are RDIMMs or LRDIMMs, which will only work on server processors, e.g. Xeon or EPYC)
 

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