12-01-2015 04:37 AM
Can someone from Lenovo officially confirm or someone who has bought this laptop test this and confirm, can the new Yoga 900 output 4k resolution @ 60hz to an external monitor, such as Dell P2715Q?
What I see in the specs, it has Intel HD 520, and the spec sheet says DisplayPort 1.2 via USB-C can drive
However, there's no confirmation anywhere of this, neither from Lenovo, nor from users. Most USB-C to DP cable makers haven't tested this yet.
I'm seriously considering the new Yoga 900 as a replacement for my T410. Main use is business and photo editing, and looks like an awesome laptop. The ability to hook up 1 external monitor at 4k @60hz is critical for me, otherwise, it's a Dell XPS 13.
Thanks in advance,
12-01-2015 10:55 PM
My question was about verifying and confirming this output in the specs. I haven't been able to find any USB-C to DisplayPort cable or docking station maker which confirms. They all say 4k @ 30hz.
Furthermore, it would be nice for Lenovo to officially confirm if this (usb-c) can support a docking station with DP at 4k 60hz, and for example ethernet, or only 1 DisplayPort at this resolution. Also, can it drive 2 QHD screens (2550x1600) @ 60hz, or only 1.
I think these are valid questions to confirm before a purchase. I am a bit disappointed that Lenovo isn't actively supporting these forums or the Q&A on their shopping website.
12-01-2015 11:14 PM
12-02-2015 01:59 AM
Thanks for the link. This seems to be one of the first such cables advertized.
However, it's a USB 3.1 and the comments are from Dell's new XPS 13/15 laptops with Skylake, which are the competitors I'm considering. Both of these laptops explicitly state DisplayPort 1.2 native support via USB 3.1 gen 2 (10gbps) connection, which is part of its Thunderbolt 3 (40gpbs) port.
This is VERY different and much more xplicit than Lenovo Yoga 900's USB 3 (type C) port. There's apparently a big difference in data rates and support of USB 3.1 gen 1, gen 2 and Thunderbolt 3.
This is the reason why I'm interested in actual use case of yoga 900 driving 4k @60hz. Can the included USB-C (3.0 gen 1) port support alt-mode to drive 4k @60hz as suggested in the Lenovo specs? If so, is it taxing the CPU heavily?!
I think these are valid questions, and I appreciate your help, however, there's still no official confirmation or use case for my question.
03-03-2016 06:31 PM
Did you ever find out the answer? Based on the fact that it's only a USB 3.0 port, I assume that it will not do 4K @ 60Hz. Additionally, I've seen other discussions that suggests it doesn't support MST either - so, dual monitors are out - at least via DisplayPort.
Can anyone verify the maximum resolution that it will support and at what refresh rate?
07-24-2016 04:31 PM
I didn't get the yoga 900 to work @2560x1440 with an ASUS PB278 external display through USB-C. The maximal resolution I got was 1920x1280. I tried two different USB-C >> HDMI Adapters.
My next bet is to buy the docking stations for 4K monitors via USB 3, normal shape. I hope that will work.
09-03-2016 05:25 AM
btw have you got your problem solved?
I'm trying to hook my yoga 900 to
LG 43UF670T UHD
it's okay if it can fire only 30hz, but my LG TV only has HDMI input
09-03-2016 05:29 AM
so your 4k display only has a hdmi input?
have you try
Jca374 from the link
it looks promisingly work I think