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On Fri, Nov 12, 2021 at 4:55 PM Rich Freeman <rich0@g.o> wrote: |
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> |
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> On Fri, Nov 12, 2021 at 5:57 PM Mark Knecht <markknecht@×××××.com> wrote: |
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> > |
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> > which I don't think is available yet but will run in the $250 |
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> > range without the drives. It appears that the motherboard |
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> > they designed takes the PCIe to a card with a PCIe-to-SATA |
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> > controller which is how you get better performance. |
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> |
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> With the USB3 solution your $40 SBC can directly access a hard drive. |
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> Now we're talking about adding $250 of hardware to get to SATA. |
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> |
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> Honestly, if you're going to start spending that much I'd really |
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> question why we're not just using a PC. |
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> |
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> I would love to see more reasonably-priced ARM options with decent IO |
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> and RAM. If you want ARM and 32GB of RAM good luck finding something |
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> for under $1k. For anything that runs 24x7 the power savings are |
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> quite significant with ARM, but you definitely give up performance and |
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> IO and of course general flexibility, If you're going to start |
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> spending hundreds of dollars on ARM unless it is as some kind of |
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> prototyping setup I'd really question why you wouldn't just use |
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> inexpensive PC hardware. Get something with integrated graphics and |
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> you have lots of PCIe lanes available for IO. You can get used HBAs |
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> fairly inexpensively as well, though I do question the reliability of |
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> some of that stuff (used). |
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> |
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> One other thing, I've used LSI HBAs with Rockpro64 SBCs (which have |
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> PCIe), and the HBAs use a ton of power. The RK3399 might use very |
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> little power (esp idle), but that LSI HBA is practically a space |
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> heater even when idle. Maybe their newer stuff is more efficient, but |
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> you're not going to get those for $30 on eBay. |
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> |
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> -- |
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> Rich |
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> |
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No disagreements at all. I was only providing 1) something for the OP |
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to look at, and 2) info on your point/question/observation about RP4 |
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having or not having PCIe. |
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As for YouTube 'influencers' I take them with a grain of salt. This guy |
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was given preproduction product which almost certainly was free and given |
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so as to produce positive press. |
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Mark |
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