I'm thinking about to buy an new laptop (Thinkpad X250). It says it have/has a mini display port. Will this mini-displayport even be able to power a monitor at 144hz?
and will the Intel HD5500 gfx be able to handle 1001fps?

The computer comes with a VGA-port as well but i doubt the vga-port can output 144hz at 1920x1080 and that no such screen have a VGA-in at all.

IIRC in theory Displayport has enough bandwidth to be able to support it, however most screen manufacturers only support 120/144Hz through Dual-Link DVI and that is usually the problem.

It might work with displayport -> Dual Link DVI adapter (might have to be an active one for the extra clock) and it _may_ work. I would Google the hell out of it or test in a store or something before buying anything if it's a hard requirement that it works with the laptop.

keep us informed

I have an 144hz LG display that I connect via displayport. That said, I also use a gtx 970. But I think intel gpu should be able to support it aswell. But... for fun I tried testing running games via the intel gpu, but I couldnt get exited playing games on it. I experienced some lag issues.


here's some copy-pasted info about resolutions-refreshrates-bandwidth-interfaces:

To display a 4k resolution at 60Hz, the video interface (HDMI, DisplayPort) needs to transfert 12Gbits/second of data:

– bit_per_channel = 8
– num_channels = 3 (RGB)
– resolution = 3840 * 2160
– 60Hz = 60 times per second
– bandwidth = 3840 * 2160 * 8 * 3 * 60
– bandwidth 4k@60Hz = 11.94 Gbits/sec
– bandwidth 4k@30Hz = 5.97 Gbits/sec


Here is a quick recap of HDMI and DisplayPort (DP) bandwidths:

HDMI 1.2: up to 4.95 Gbits/sec
HDMI 1.4: up to 10.2 Gbits/sec
HDMI 2.0: up to 18.0 Gbits/sec
DisplayPort 1.2: 17.28 Gbit/sec
DisplayPort 1.3: 32.4 Gbit/sec

Oh and the Intel gfx won't do 1001 fps stable. Might do something like 462 though, mine did but I also ran it on the fastest i7 available.

I have being some googling but really can't find the answer
I found there was some minidisplayport->displayport adapter, but i guess no 144hz monitors have displayport
and really i think HD5500 is piece of crap.

Will probably just go for a normal i5 workstation

3840 * 2160 * 8 * 3 * 60
11943936000 bits in gbit => 11.9439gbit/s
1920 * 1080 * 8 * 3 * 144
7166361600 bits in gbit => 7.16636gbit/s

Is it really bits and not bytes?.
And the beats, which monitor do you got that support 144hz via displayport?

Seems like the minidisplayport and displayport is the same thing, just need a converter

Perhaps time to buy this x250.. (it have the version 1.2 minidisplayport)

Perhaps works with this?

Talked to the people in the inteldriver channel and they claimed that the ramdac of the x250 probably is only 450mhz.

by calculations with
$ gtf 1920 1080 144
# 1920x1080 @ 144.00 Hz (GTF) hsync: 169.06 kHz; pclk: 451.72 MHz

out of luck, not going to buy this before ramdac is confirmed of x250.