Sure looks like a good deal! - Page 1
Forum section: electronics / general

author: SiliconWizard
author_rank: Super Contributor
timestamp: September 25, 2025, 10:14:58 pm
content: Yes, that's one heck of a deal, Aliexpress!

author: brucehoult
author_rank: Super Contributor
timestamp: September 25, 2025, 10:32:29 pm
content: That would indeed be a very good price for a Jupiter with an M1 and 16 GB RAM -- the only type in stock at the official non-China supplier, Arace, at the moment.But that one looks to have the plastic package slower K1 and so presumably 4 or 8 GB RAM. Looks like a pretty normal price for an 8 GB.Can't tell which Ali shop it is, there are several with Jupiter, all unofficial, so be careful. The cheaper shipping than Arace is tempting though.

author: SiliconWizard
author_rank: Super Contributor
timestamp: September 26, 2025, 01:36:04 am
content: You probably didn't really look at the striked price, the -85% and the new price, which was quite funny and quite typical of Aliex promotional thumbnails, but to a new level yet!On a more serious level, this is only for the 4GB/K1 version. For the 8GB/K1, price is about 130 eur. Both 4GB and 8GB free shipping. The 16GB/M1 version is 192 eur + 64 eur shipping. Which is outrageous.On Arace, the 16GB/M1 version is 100.95 eur - now we must add VAT (which Aliex does automatically), so that's about 120 eur. And shipping is 80 eur (only option: DHL), which is even more outrageous. But that still cheaper overall than on Aliex. But for the 4GB or 8GB versions, Aliex is worth it.

author: kite31
author_rank: Regular Contributor
timestamp: September 26, 2025, 02:19:32 am
content: It is not even a matter of a misplaced decimal point.

author: brucehoult
author_rank: Super Contributor
timestamp: September 26, 2025, 02:28:03 am
content: Quote from: SiliconWizard on September 26, 2025, 01:36:04 amOf course I saw that. Weird. I've never seen anything like that before, and wasn't able to duplicate it on Ali myself.QuoteI would not personally buy a Jupiter at all right now. 12 or 15 months ago, sure.If you only want a 4 GB K1 then the Orange Pi RV2 is a much better deal. Here an 8 GB one for $49.90 with $8.80 shipping (well, to NZ), from an Ali store officially recommended by Orange PI. 100 available.https://www.aliexpress.com/item/1005008606139385.htmlOr another official distributor with 16 available:https://www.aliexpress.com/item/1005008607519068.htmlIf you don't like Orange Pi for some reason, the LicheePi 3A is the same SoC and Sipeed provide better ongoing support. $99 + $10.02 shipping (to NZ) for the 8 GB one (plus 32 GB soldered on eMMC) from the official Sipeed store on Ali. That's what I have myself.https://www.aliexpress.com/item/1005007656383220.htmlIf you want an ATX board but don't care about RVV right now then the Megrez is only very few dollars more expensive than the Jupiter but 2-3 times faster. My 16 GB one cost $199 (plus Arace ripoff shipping).The upcoming Milk-V Titan will be a good pure compute RVA22 without RVV board when it hits, with 8 cores each Nehalem level µarch though only at 2.0 GHz, not 2.8 GHz (3.44 turbo) like the i7-860 I had back in 2009/10.Personally (as I have a K1 and P550 boards), I'm now waiting for either SpacemiT K3 or Tenstorrent Ascalon, both of which are RVA23.

author: SiliconWizard
author_rank: Super Contributor
timestamp: September 26, 2025, 01:52:21 pm
content: For sure.As I mentioned before, I'm currently more interested in TH1520-based boards. First because it has better performance and second because almost full documentation has been released.Otherwise, for boards with the SpacemiT X60, the Orange Pi RV2 is certainly a much better deal.I'm also watching the milkV Titan. It will be an interesting platform for desktop use, even if it's still not going to be a match for current x86 CPUs.Regarding the Ky X1 (SoC on the Orange RV2), I'm looking for docs - I'd be interested in going baremetal with it.From what I've gotten, it's based on a SpacemiT Keystone K1, which has documentation here:https://developer.spacemit.com/documentation?token=Alhewa0fai7lvbk9sajcumNqn4fI haven't fully looked at it yet to figure out how much is actually documented.

author: brucehoult
author_rank: Super Contributor
timestamp: September 27, 2025, 01:12:04 am
content: Quote from: SiliconWizard on September 26, 2025, 01:52:21 pmYup, a good CPU core, handicapped (for some tasks) by not enough cache. On my purely L1 cache primes test it's about 20% lower IPC than EIC7700X (P550 cores), but compiling gcc or Linux kernel it's slower than the in-order JH7110 which has 2 MB L2 vs only 1 MB on the TH1520. (EIC7700X has 4 MB L3)Also by far the highest-performance vector implementation currently available, if you don't mind the 0.7 draft. And the privilege escalation and other bugs. All of which is fine for specialised purposes with custom code and no untrusted users/code.I don't recall whether vector is important to you or not.

author: SiliconWizard
author_rank: Super Contributor
timestamp: September 27, 2025, 04:35:29 pm
content: Oh, that's right. One plus of the SpacemiT is that it supports RVV1.0. It also has pretty limited cache though (512KB per cluster of 4 cores), which I'm sure handicaps it quite a bit. It's also only in-order (from what I understand). But I wouldn't have use cases for either the K1 or the TH1520 for anything like desktop use. For these, I'm more looking for something that would be used as "application processors", like big powerful MCUs.I have used RVV 0.7 on the CV1800B, which is ok, but I'd certainly prefer RVV 1.0.From the docs above for the Keystone K1, looks like they're pretty complete (datasheet + ref manual + hardware guidelines and example schematics), although not as detailed as those for the TH1520. Only in HTML form though - would like to find PDF versions.For possible desktop use, I'm waiting for RVA23-compliant CPUs.