[mythtv-users] Ceton InfiniTV 4 and patches to support it

[Ken Truesdale]

On 29/07/11 17:32, Ronald Frazier wrote:
> I haven't yet taken the time to measure things to be absolutely
> certain, but if my motherboard is not perpendicular to the back panel
> (as I suspect), how exactly would that be Ceton's fault? As I said,
> I've also experienced this with my Hauppauge card. I think the biggest
> difference is, as ken mentioned, a PCI 1x has a much smaller connecter
> than an 8x or 16x PCIe or an old regular PCI card does. Thus the
> smaller connector doesn't have quite as much grip and is more likely
> to slip out. This is the first 1x PCIe card I've ever purchased, so
> that may be why I'm particularly noticing this sort of thing now.
> 



On Jul 29, 2011, at 1:47 PM, Mike Perkins wrote:
> Maybe, but is the Ceton card the correct thickness? Even a few microns can make 
> a difference to how well a board fits in the connector. Add to that a back plate 
> which may be slightly too close/too far away or slightly offset and it can make 
> fitting a card a matter of good luck.


I got the calipers out.  The Ceton card is 1.37mm.  The graphics card in the X16 slot next to it is 1.51mm.  Some random old modem board I had collecting dust in a bin is 1.49mm.  I didn't do an extensive measure all around each card or measure the conductor tangs vs. measuring the top edges - I measured the top edges on all 3 because it was easier than pulling out the two cards I measured that are in use and disconnecting their respective cables.  But I imagine that the thickness is pretty consistent throughout the card.  

So while I agree with Ron that the variation in computer cabinets shows poor tolerances (and my BE that the Ceton is going in is a factory Dell with the original mobo factory installed), I agree with Mike that Ceton should probably work with their supplier(s) to get a more standard card thickness - 0.1mm is certainly a lot when it comes to card thickness.  And as inaccurate as my measurements are, they are good enough to indicate that the Ceton is thinner than the other two cards I checked.  


Ken.