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bgnn commented on Does MHz Still Matter?   ubicloud.com/blog/does-mh... · Posted by u/furkansahin
wmf · 4 days ago
Threadripper can OC to 5+ GHz.
bgnn · 2 days ago
I'm waiting to get my hamds on Threadripper Pro 9995WX, which is Turbo at 5.4GHz. Currently I'm using Ryzen™ 9 9950X, Turbo at 5.7 GHz. It's a 7% difference.
bgnn commented on Does MHz Still Matter?   ubicloud.com/blog/does-mh... · Posted by u/furkansahin
CBLT · 4 days ago
I'm in disbelief that the software you run is completely insensitive to IPC and instruction latency. Without those number, clock speed is meaningless.
bgnn · 2 days ago
I don't have those numbers, but here is AMD's on results on Cadence Spectre X with different gen EPYC CPUs, maybe this helps for you to understand the issue: https://www.amd.com/content/dam/amd/en/documents/epyc-techni...

About the technical problem: it's ODE solution for a sparse matrix of 10s of millions elements. Sparsity comes from the locality of interactions within a chip: not every transistor is connected to thd others. So the modern simulators make use of this sparsity to divide the circuit to independent chunks and spread over to multiple independent threads.

Scale of the compute time is not objective, but typically anywhere from couple hours to couple of months. Most top level chip integration verification jobs take weeks. Because of this we spend months for verification after the design is pretty much finish before the tapeout. This applies for every single reasonably complex chip.

bgnn commented on Burner Phone 101   rebeccawilliams.info/burn... · Posted by u/CharlesW
asyx · 3 days ago
Not from the UK but in Germany we have the same issue where there is T-Mobile (best coverage), Vodafone (good coverage) and o2 (worst coverage) and there are simply some remote areas where anything but T-Mobile doesn’t have coverage.

And the easy answer is that T-Mobile, or rather the parent Telekom, is a terrible company best known for right now for getting the government to agree that they can cancel your existing internet contract to make switching easier when they want to catch you as a fiber customer but actually all they’re doing is sending a marketing company around Germany (Raider Marketing) to lie to your grandma to sign contracts for the Telekom or just cancel your existing internet contract because they think with a bit of pressure they can get you to sign up with them.

Alternatively, they are also known for the worst peering on existence because they have the crazy idea that they can charge tenfold what other ISPs take for peering because they are the Telekom…

In summary, the Telekom is such a terrible company that I’d rather not give them any money and if I needed T-Mobile coverage I’d rather get a foreign eSIM and rely on roaming than giving them a single cent.

bgnn · 2 days ago
Don't they get paid at the end when you are roaming?
bgnn commented on Does MHz Still Matter?   ubicloud.com/blog/does-mh... · Posted by u/furkansahin
bgnn · 4 days ago
If you are running engineering jobs (HPC) like electrical simulation for chip design the only two thingd you care about are the CPU clock speed and memory RW speed.

It's unfortunate that we can only have 16 core CPUs running at 5+ GHz. I would have loved to have a 32 or 64 core Ryzen 9. The software we use charge per core used, so 30% less performance is that much extra cost, which is easily an order of magnitude higher than a flagship server CPU. These licenses cost millions per year for couple 16 core seats.

So, at the end, CPU speed is determining how fast abd economically chips are developed.

bgnn commented on Who Invented Backpropagation?   people.idsia.ch/~juergen/... · Posted by u/nothrowaways
andyferris · 8 days ago
I believe the reason it works in nonlinear cases is that the derivative is “naturally linear” (to calculate the derivative, you are considering ever smaller regions where the cost function is approximately linear - exactly “how nonlinear” the cost function is elsewhere doesn’t play a role).
bgnn · 7 days ago
that makes a lot of sense actually. thank you.
bgnn commented on Volkswagen gates a new vehicle's full horsepower behind monthly subscription   dexerto.com/entertainment... · Posted by u/taubek
bgnn · 8 days ago
Everyone in the comments rightly complaining about this being am extortion, which it is! But tge more interesting part is the source of this behaviour: stock markets.

Tesla market cap was so high that any other normal producer felt the pressure. Simply designing and delivering good cars won't do it, because then you aren't a service company. Investors want you to exploit the customers to the last drop financially. You should try to make the product a service, because products are so 20th century! You shouldn't stop there though, you should also exploit their data. Because that's where the money is, because how else would you get ad revenue.

This is not meant to be satirical btw. It's really what's going on. VW tried to build a tech company as Cariad, which imploded because it's an old school industrial production company. They keep trying to throw tech at it but they can't do it like Tesla. They can build good EVs if they wanted, but they can't focus because imvesters are pulling them to ten different directions. One day it's software stack, the other day it's zonal architecture. It's sad to see them die a painful death like this.

bgnn commented on Who Invented Backpropagation?   people.idsia.ch/~juergen/... · Posted by u/nothrowaways
pjbk · 8 days ago
To be fair, any multivariable regulator or filter (estimator) that has a quadratic component (LQR/LQE) will naturally yield a solution similar to backpropagation when an iterative algorithm is used to optimize its cost or error function through a differentiable tangent space.
bgnn · 8 days ago
So yeah, this was what I was thinking for a while. What about a more nonlinear estimator? Intuitively seems similar to me.
bgnn commented on Who Invented Backpropagation?   people.idsia.ch/~juergen/... · Posted by u/nothrowaways
jimsimmons · 8 days ago
Honest person would have rejected it and protected the prize's honour
bgnn · 8 days ago
It's up to the committee to protect that honour
bgnn commented on Modern Cars Wreak Havoc on Radar Detectors   thedrive.com/news/modern-... · Posted by u/PaulHoule
Klonoar · 9 days ago
This is what I was referring to, yes.
bgnn · 9 days ago
In Germany you get the fine with the photo where the face of the driver is very visible/recognizable 99% of the time. Even in villages have this type of cameras so they can't be expensive. Oh you get fined for driving without a seatbelt too.
bgnn commented on A Race to Save a Signature American Tree from a Deadly Disease   nytimes.com/2025/08/13/re... · Posted by u/jgwil2
plipt · 10 days ago
I wonder, does Asia and Europe have nearly as many problems with North American invasive plants / pests / diseases as North America does with its non-natives?

Being from the US, I don't recall any such stories in the news.

bgnn · 10 days ago
Oh we do! There's a nice statistic fron the Netherlands about the number of invasive species, which is exponentially growing: https://www.clo.nl/en/indicators/en162202-alien-species-in-t...

Most of these are from Asia and Noth America.

u/bgnn

KarmaCake day646December 7, 2023View Original