Does the Late 2009 iMac i7 have dual channel SATA II?

no not really I bought this machine at the apple online store, the first mac pro had the flickering graphics, which I return and the second one has the slower PCI Flash drive I am just surprise why this fluctuation of hardware one with a problem in the graphics this one with a slow flash drive. Sometimes I wonder what is going on in the mass production line in Apple.

if I would of known I would of hold on to the first mac pro, now I have a mac pro that shows a slower SSD what the **** is going on this is like a cat and mouse game I have to be on top of what is going on with the hardware like if we are some sort of electrical engineer with all kinds of testers and benchmark to see if all is working to optimization.....

I did some investigating and found out that apple uses two different type of Flash drives for their components by two different companies, One of them is Samsung and the other is Sandisk, guess which one is the fastest, if you said Samsung you guess right, your iMac 5K skylake has the samsung drives that is why your iMac and my mac pro of older technology was running up and very close to your iMac in flash drive speed. The difference and I saw this difference when I was at the apple store is that your logic board controller is of a much later generation I think its yours has a link speed of 8.0 GT/s because I checked it out in the apple store when I was returning my first mac pro with that flash drive speed that was close to yours, and now I have the Sandisk which is much slower drive way much slower, the new Samsung drives that are in the mac pro that are being produce now, is a recent generation flash drive, that is why there is a differences in speed, should I ask the apple guy to just switch the 256 flash storage drive for the samsung I think yes, I should because its not fair that apple to save cash stocks up on several companies components like this and having some computers with slower performance. This is a practice that apple does with the recent iPhone 6S they have two different chips and they perform differently, I am mostly sure that your flash drive is the same that was in my first mac pro that is why you was so surprise that my mac pro with being two years old and your recent iMac 5K with skylake processor were so similar in drive speed. The reason why your was still higher was because of the PCI Controller which your has a much faster link speed.

yeah but being this a pro machine your expecting it to work with top notch performance. It is clearly shown how the SSD disk speed on one machine was insanely fast close to your recent iMac 5K Late 2015. Just the SSD alone made the machine run much faster, but at the same time it was kind of finicky. This one works more stable. Lets see how the saga goes with this machine I will keep you updated. On this mac pro.