Why they don't talk about the PCIe switch? Why test results below 12000MB/s? Results are comparable to a PCIe 8x switch, like a 8x 4-Port card.
Seems very sketchy to me…
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Amfeltec x16 PCIe with 4 SSDs: 5900+ MB/s
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Seems very sketchy to me…
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VERY SKETCHY... and my .02 cents / comments from the peanut gallery....
I think the results are based on assumptions, rather than actual boards.
When it comes to M.2 PLX, there are 2 chipset manufacturers dominating the market:
Broadcom has 16x and 8x versions of the PLX used in the Highpoint 7101/2-A, amfeltec squid, qnap m.2, and countless motherboards. 16x versions max transfer is just over 6000 MB/s in the cMP. 8x versions max out at 3000mb/s in the cmp.
Asmedia has a low-cost 8x PLX that's used in the 2 m.2 slot IOCrest/Syba board and other 4 slot offerings with a max transfer of about 3000MB/s, about 1 SSD at a time in the cmp.
Developing a custom board design is futile and a waste of cash. There are plenty of ODM manufacturers available with existing designs for the aforementioned chip-sets.
The best solution would be to leverage a group purchase for a set number of boards, with a cascading discount based on the order volume, presenting it as such.
Working directly with the manufacturer can greatly lower the cost per unit, that can be passed on directly to the user.
Double and add a little more for PCIe 3.0, you are using PCIe 2.0 values. That card is sold as a PCIe 3.0 - probably has an Asmedia 8X PCIe 3.0 switch.
The board has PEX8 written, btw.
Yepp Ya caught me... I was stating max bandwidth on a cm @ pcie 2.x , not a pcie 3.0 slot.
The kickstarter pics and the writing offers little to trust.
The picture shows only two M.2 connectors. The board is not offset like the amfeltec, so putting two M.2 connectors on the backside will interfere with the adjacent slot.
Why does it say only 80 Gbps? That's only 10 GB/s. A PCIe slot can do 8 GT/s * 16 lanes * 128b/130b = 126 Gbps. A single NVMe drive can do around 3500 MB/s. Four of that means 14 GB/s. If you have NVMe drives that can do 3000 MB/s, then that would give you 12 GB/s. I got 11 GB/s on my Z170X-Gaming 7 PC with the Amfeltec.
How are they going to make it less expensive than the amfeltec or the highpoint? I don't see any useful differences.
does this still hold true? (Gen 2 being better for our cMPs than Gen 3?)
Never was.
Back in the day you had to change the PCIe slot speed manually, default was PCI 1.0 speeds, but since 138.0.0.0.0, the firmware does it automatically.
This idea originated by one more non-sense article from Barefeats, if he checked the PCIe configuration, he would clearly see that was just a matter of initialisating the slot correctly, since MP51 firmwares configured PCIe 3.0 cards as PCIe 1.0, this behaviour ended with 138.0.0.0.0.
Barefeats has very good comparatives, said that, some things are out of his deep and he never corrects past articles that are wrong.
I can see how that happened haha... it's an adventure following these threads and finding what you think is new info that is so quickly irrelevant within a year
I had looked that that article and even thought I'd ruled out PCIv1 mis-negotiation. Now I see it saturates with two m.2 cards, which is exactly what we'd expect with PCIv1.
Always good to have reasoned replies to help correct these bits of misinformation!