Kaby Lake Precision pre-release discussion (5520 / 7520 / 7720)

Now I'm tempted to order right away. Was wanting to wait for some first opinions here. Though I've never gotten anything from Dell that I had to return or even had problems with. Decisions, decisions on when to get my Precision

 

And thanks again for this great information. Now I only have to be patient to wait, until my german salesrep. can reenter my order.
Did I mentioned, that I'm very patient in my decision process and that I'm really unpatiently when I made my decision

At least two questions: On the configuration site the NVME-protocol is only mentioned for the 2nd PCIe M.2-SSD.
Is it true, that the NVMe-protocol is only accessable for the 2nd SSD?
How many PICe-lanes will be used in the 7720 m.2 slots?

 

Hi

Is it true that by using the TB16 docking station with Precision 7720, both the docking station and your precision need power cable attached?

http://downloads.dell.com/manuals/a...-thunderbolt-dock-tb16_user's guide_en-us.pdf
Page 5 lower right image

Does 7720 require more than 130 watt?

 

Yes, 7720 needs way more than 130 watts and a ThunderBolt port won't be enough to power the beast. In case you still try it I don't know if it will just won't take any power at all from the TB port or if it will use slowly the battery though to compensate.

On a docking station you plug the regular 7720 power supply and then get all the power you need, as it always has been (and everything connect at the same time). This is the best option I think.

 

But that is not what the manual says?

 

By docking station I mean the old big one connecting to the big long connector under the Computer (E-dock family). And the manual suggest the TB port can provide part of the power, meaning if you're just watching email at low light level on the display you may have enough with 130 W, but not if you're watching full HD suspicious movies, running 13000 parts on SolidWorks or playing Call of Duty

 

My interpretation is that performance will be throttled when getting power from the dock to ensure that the power drain does not exceed the capacity. ie the same behaviour as if plugged in to a normal PSU of insufficient capacity. The first power reduction measure is to reduce / stop any battery charging after which the CPU / GPU will be slowed down.

However, if you are doing some undemanding work then the dock power should be enough to run the computer and recharge the battery.

John

 

I think the 7720 no longer has the E-port connector?

 

Still has it, at least in Canada. It makes no sense to remove the E-port if the TB can't handle every in/out of the computer.

 

Tell this to hp.