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Posted by zenincognito 7 hours ago

The $8 Linux Computer (2022)(thelittleengineerthatcould.blogspot.com)
176 points | 79 commentspage 2
snvzz 4 hours ago|
If the intent is to play with RISC-V cheaply rather than getting the absolute cheapest computer, I'd look at something with C908 (a small cpu that is vector capable, RVV 1.0).

A particularly good deal is the Banana Pi BPI-RV2: It has 4xC908@1.25GHz, 512MB DDR3, M.2, miniPCIe, 1x 2.5GbE, 5xGbE.

There is a cheaper Banana Pi BPI-CanMV-K230D-Zero. 2xC908, 128MB LPDDR4, KPU, MIPI CSI/DSI, Wi-Fi, 40x GPIO.

If serious about RISC-V, then of course RVA23 is desirable. Unfortunately any SBC with that is currently expensive due to the RAM shortage situation.

ajju 5 hours ago||
Also liked your “Nature abhors unused RAM” piece.

https://thelittleengineerthatcould.blogspot.com/2019/10/horr...

Sam Altman is just catching on ;)

dizhn 2 hours ago|
Linux has historically also done this. Unused RAM is wasted RAM. So in goes the cache.
andai 4 hours ago||
>At the time of writing, ethernet, wifi and SD-Card are not working.

This might be the most Linux sentence ever!

winrid 7 hours ago||
Quick someone upload a passmark score

Probably a little faster than a Pentium 3

BadlyDrawnBoy 6 hours ago|
The C906 core that runs Linux on the BL808 SoC on this device has roughly the same integer performance as a P3 on a per Mhz basis. The C906 is about 2.4 DMIPS / Mhz and the P3 is roughly 2.4 (Katmai core) - 2.8 (Tualatin core) DMPIS / Mhz depending on the version. You are looking at roughly P3 450 integer performance

Its an interesting comparison that Im not sure reflects positively on the RISC-V C906 core when you factor in core area and process nodes and core area, 22nm vs 250nm. Even if we choose the worst case scenario for the P3 cores to compare which would be the Katmai core. We are basically look at ~parity with a 30 year old core design

C906 core only @ 22nm = ~0.6 mm2

C906 core only @ 250nm = ~78 mm2 (geometric transform)

P3 core only @ 22nm = ~0.5 mm2 (geometric transform)

P3 core only @ 250nm = ~76 mm2

Apologies if this is messy and badly formatted. Im currently at a wedding, sat waiting between the ceremony and the after party and Ive quite a few beers. I responded because its something I looked at previously with RISC-V cores and I already had the answers in my head

cbolton 2 hours ago|||
This scaling computation is too naive and gives the wrong conclusion. If you look at the number of transistors it's about 4.3 million for the BL808 vs 9.5 million for the Katmai core. Counting the logic transistors looks even worse for the Pentium: 2.5M for the BL808 vs 7.5M for the Katmai.

So the Pentium 3 is 2x the transistor count of the C906 (even 3x if you ignore SRAM) and that's despite being 32-bit while the C906 is 64-bit and has a much more capable vector unit.

(As for new vs 30 year old design I don't really have an intuition how that's supposed to factor in the comparison... But if we consider that we should also consider how much engineering effort went into each of these cores, and we're probably talking a dozen engineers for a couple years for the C906 vs hundreds of engineers and more years for the Pentium.)

winrid 2 hours ago||||
Haha thanks. I played games and browsed the web on a 450mhz P3 system as my daily box running Linux for a while.
popol12 6 hours ago|||
Interesting, thanks! Would be cool to have the same comparison for a modern Intel cpu
znpy 7 hours ago||
The chip computer used to be much more capable and feature rich at just 9$
pwndByDeath 6 hours ago||
I'm so sad that one didn't prosper, I still love the deck they sold
znpy 5 hours ago||
I still regret not buying the full package, including the deck
andai 4 hours ago|||
~$13 adjusted for inflation.
tdb7893 7 hours ago|||
Assuming you're referring to the one released in 2015, with inflation that's nearly 50% more expensive apparently.
redeeming 5 hours ago||
[flagged]
nojs 6 hours ago||
Is the Pi Zero 2W globally unobtainable at this point? What are folks using instead?
ac29 5 hours ago||
You can get amazingly far with an ESP32, RP2350, or other modern microcontrollers if Linux isnt a hard requirement.
firesteelrain 6 hours ago|||
Complete starter kit for $90 here

https://www.canakit.com/raspberry-pi-zero-2-w.html?cid=usd&s...

spectre9 6 hours ago||
You’re not saying that this 8$ project costs 90$ today, are you?
hereonout2 5 hours ago|||
Damn, I just checked eBay prices - even second hand some people are asking close to this! I should dig mine out and cash in too.

Out of interest I just dug out my invoice for the pi500+ I brought almost exactly 12 months ago - looks I got it at around 40% of the price it goes for today.

I agree with the other poster though, ESP32 is a good alternative if you don't need linux - these things are great ...

https://shop.m5stack.com/products/atom-lite-esp32-developmen...

ssl-3 31 minutes ago||
For a buyer, eBay prices for used Raspberry Pis have never looked very attractive.

People don't sell enough of them[1], so the supply/demand curve favors demand and the price is only tempered by that of new hardware (if it is readily available).

That's good for sellers who pay attention. If you've got stuff that you aren't using and the price is high-enough to get your interest, then: Please sell it. :)

-

[1]: I have a theory for why it is this way:

Lots of folks buy Pi hardware. And by that, I mean: It's small compared to the market for iPhones, but it's enormous for a quirky SBC with DIY traits. But lots of those folks futz around with them and lose interest. Into the drawer they go.

People assume the value of computer-ish electronics drops dramatically over time. And for most of the history of personal computers, that's broadly been very true.

Plenty of folks do sell stuff on eBay, and those who have done so know that it can be a pain in the ass to deal with. Packaging, descriptions, printing, photos, getting the thing to the post office or whatever, dealing with the risk of getting ripped off: It sucks. It especially sucks for small quantities of unique (to the seller) low-value items.

So that Raspberry Pi (whether once $20, $40, $80, or whatever) sits in the drawer. They might sell for $200 today, but the uninterested owner doesn't know that. They assume that it's worth less than the cost of a pizza and just isn't worth fucking with at all.

So, even if they might be motivated to deal with eBay for a couple of hundred bucks, their lack of interest means that they never know that the price is high.

Accordingly, the devices stay in the drawer. The $200 remains unrealized. The devices will probably get binned after a few more years of taking up space, if they aren't binned in the next move.

firesteelrain 1 hour ago|||
It was always misleading to say it was just $5 because you need power supply, flash card, case etc

This includes all of that

mpeg 5 hours ago|||
You can pick them up in the Cambridge store, if you're anywhere near it, I bought one last week and they had plenty in stock.

But online it's very hard to find

queenkjuul 1 hour ago|||
My local Microcenter has 20 in stock but the price has risen to $18
wolvoleo 6 hours ago||
There seems to be a 3W coming. I guess availability will suck though.
tamimio 4 hours ago||
I got a proxmox server hosting many stuff on a T530 thinkpad I got for less than $5, now beat that! Actually, I have a 2015 imac running archos that I got free from an old boomer, he even incl the magic mouse and keyboard.
robertpduncan 20 minutes ago||
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lihaciudaniel2 23 minutes ago||
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