These are an AMD Milan CPU, x86-64 like many desktops/laptops, but with a lot more cores. I admit I don't know what operating systems they ship or support, but my guess is that customers will expect to run the same Linux and windows server workloads their off-the-shelf servers do. Yes, in theory anything that can run unattended is a good candidate for running on a server.
Higher DC voltage means less current, so (generally) for power delivery/connectors you want higher voltage if you can. The upper bounds on that voltage are often between (1) regulatory definitions of what "low voltage" is (this legal limit varies between 48v to 60v depending on context), (2) what your DC-DC converters can convert cheaply/efficiently, and (3) amperage/heat limits of your power connectors
@@admalledd 48v seems like the standard value for low voltage that I’ve heard of, but i dont know much about DC in the data center. Is 54v a standard value there?
Disclaimer: I work for Oxide According to UL 62368, an ES1 circuit is the lowest hazard level covered by the standard and is generally equivalent to SELV (Safety Extra Low Voltage) and the voltage limit to be classified as ES1 is 60VDC. 54.5V is approximately 9% below this limit, which allows for voltage variation due to line/load/etc and still be able to guarantee that the voltage will still be considered "low voltage". While 48V is standard in telecom infrastructure (many times -48V), but it doesn't hurt anything to go as high as possible here since most standard 48V power supplies designed for telecom aren't dense enough for our applications (our input DC-DC is 1300W continuous rated) and the power circuitry (such as hot swap controllers) work just fine at 54V instead of 48V. The higher voltage you go, the lower your resistive losses are (which go up with the square of current). Some of the more recent Open Compute (ORV3) designs use 50.5V instead of 54V, but we haven't found anything that would make us go that route and 54.5V is still a "standard" voltage for the parts we would need.
@@EricAasen-Oxide OSHA requires additional safety requirements for anything about 50v so a lot of industries just go 48v to stay under that limit. Plus it is easily split into other common voltage levels (24v, 12v, 6v, 3v, and 1.5v) which is proballly useful for sourcing parts.
@@AndrewMorris-wz1vq As I understand the OSHA requirements, those are more around guarding to prevent accidental contact. Our system is touch-safe and nothing over 12V can be reached while it is powered. The busbar is also touch safe even when something is removed from the rack for service. The limit of 60V from the UL regulation has more to do with the minimum required isolation barriers you need between hazardous voltages (such as those above the ES1 limit of 60V) and lower voltages or accessible parts (things that can be touched by a user during normal operation) that might become energized with a hazardous voltage if there was a fault condition. This is the reason there are quite a few power supply designs now that are not isolated and go from 48 or 54V down to either an intermediate bus of 6-12V or direct from 54V to the very low (0.5-1.5V) voltages a large ASIC like a processor or GPU needs in one conversion step. This is done on designs like the AI accelerators from AMD and NVIDIA because of the extreme power levels they need in exceedingly small spaces. Of course there are tradeoffs there, but if those designs had to be isolated, they would not be as dense as they are.
It's such a clean design! Looks like Oxide EEs and MEs are allowed to talk to each other, directly. 😅 I especially like the minimal use of cabling.
Superb!
Easily replaceable temp sensors on little daughter boards is a great idea.
I don't know anythibg about servers.
How do server CPUs work? Are they x86? Can they run CLI desktop programs the same way?
These are an AMD Milan CPU, x86-64 like many desktops/laptops, but with a lot more cores. I admit I don't know what operating systems they ship or support, but my guess is that customers will expect to run the same Linux and windows server workloads their off-the-shelf servers do. Yes, in theory anything that can run unattended is a good candidate for running on a server.
superb design would like to see a better video i.e. hi-res, closeups and better lighting
Very demure, very mindful!
😍
To whom do I send the nickel?
Why 54v?
Higher DC voltage means less current, so (generally) for power delivery/connectors you want higher voltage if you can. The upper bounds on that voltage are often between (1) regulatory definitions of what "low voltage" is (this legal limit varies between 48v to 60v depending on context), (2) what your DC-DC converters can convert cheaply/efficiently, and (3) amperage/heat limits of your power connectors
@@admalledd 48v seems like the standard value for low voltage that I’ve heard of, but i dont know much about DC in the data center. Is 54v a standard value there?
Disclaimer: I work for Oxide
According to UL 62368, an ES1 circuit is the lowest hazard level covered by the standard and is generally equivalent to SELV (Safety Extra Low Voltage) and the voltage limit to be classified as ES1 is 60VDC. 54.5V is approximately 9% below this limit, which allows for voltage variation due to line/load/etc and still be able to guarantee that the voltage will still be considered "low voltage".
While 48V is standard in telecom infrastructure (many times -48V), but it doesn't hurt anything to go as high as possible here since most standard 48V power supplies designed for telecom aren't dense enough for our applications (our input DC-DC is 1300W continuous rated) and the power circuitry (such as hot swap controllers) work just fine at 54V instead of 48V. The higher voltage you go, the lower your resistive losses are (which go up with the square of current).
Some of the more recent Open Compute (ORV3) designs use 50.5V instead of 54V, but we haven't found anything that would make us go that route and 54.5V is still a "standard" voltage for the parts we would need.
@@EricAasen-Oxide OSHA requires additional safety requirements for anything about 50v so a lot of industries just go 48v to stay under that limit. Plus it is easily split into other common voltage levels (24v, 12v, 6v, 3v, and 1.5v) which is proballly useful for sourcing parts.
@@AndrewMorris-wz1vq As I understand the OSHA requirements, those are more around guarding to prevent accidental contact. Our system is touch-safe and nothing over 12V can be reached while it is powered. The busbar is also touch safe even when something is removed from the rack for service. The limit of 60V from the UL regulation has more to do with the minimum required isolation barriers you need between hazardous voltages (such as those above the ES1 limit of 60V) and lower voltages or accessible parts (things that can be touched by a user during normal operation) that might become energized with a hazardous voltage if there was a fault condition.
This is the reason there are quite a few power supply designs now that are not isolated and go from 48 or 54V down to either an intermediate bus of 6-12V or direct from 54V to the very low (0.5-1.5V) voltages a large ASIC like a processor or GPU needs in one conversion step. This is done on designs like the AI accelerators from AMD and NVIDIA because of the extreme power levels they need in exceedingly small spaces. Of course there are tradeoffs there, but if those designs had to be isolated, they would not be as dense as they are.
it looks too big for what it is, should have 2 cpus for the size
Well, that's a socket SP-3, so potentially you're looking at 64 procs right there. Socket count doesn't really matter as much as it once did.
@@JohnVance Agreed, especially given the memory bandwidth available to one socket today.