Yokemate of Keyboards
Posts: 4976 from 2009/1/28
From: Delaware, USA
>> the x16 slot only has [...] connected [...] 4 lanes. But the data sheet [...] speaks
>> about many controllers but *not available simultaneously* (depends on HW
>> configuration perhaps?), so with the known other features of the Tabor, does
>> x4 lanes for graphics sound reasonable?
> Yes, it sounds reasonable to me that one of the three PCIe controllers uses
> four of the six SerDes lanes.
I don't know what I was thinking two years ago when I answered that question, but of course it doesn't sound reasonable at all to use 4 out of 6 available SerDes lanes for PCIe, and also use 2x SATA and GbE from the P1022 which requires 3 more SerDes lanes, adding up to 7 required SerDes lanes in total.
Hey, don't beat yourself up over that, I pretty much ignored Tabor until the discussions about the X5000's limitations started.
Then I thought 'wait a minute, how many lanes can the P1022 provide?'.
It doesn't add up, does it?
They could be using something that multiplexes or switches PCI-E lanes, but not having a complete set of specs on Tabor, I don't know.
Didn't we have a screenshot of that board at one time?
"Never attribute to malice what can more readily explained by incompetence"