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MimmoG
Blue Screen Again
Posts: 13
Registered: ‎02-11-2019
Location: IT
Views: 6,359
Message 41 of 86

Re: T490 & T590 - First Look (review, benchmarks)

No, into the model T490s all are optional RJ45, NFC and Sdcard reader

jeremyshaw
802.11n
Posts: 145
Registered: ‎07-13-2018
Location: US
Views: 6,344
Message 42 of 86

Re: T490 & T590 - First Look (review, benchmarks)


@MimmoG wrote:

No, into the model T490s all are optional RJ45, NFC and Sdcard reader


Ah, this thread is about the T490 and T590, a different model from the T490s.

 

T490s this time around seems to share a lot of charactoristics with the X390.

Boogey
Paper Tape
Posts: 6
Registered: ‎04-12-2019
Location: CA
Views: 5,960
Message 43 of 86

Re: T490 & T590 - First Look (review, benchmarks)

"400 nit FHD displays are the newer ones, but there are two:

Low power (800:1 contrast ratio)

Privacy (1000:1 contrast ratio)

 

Both claim ~100% sRGB (which is good, compared to the 300nit FHD panel)."

 

Where is this "100% sRGB" claim?

 

I've been scouring T490 info for weeks and haven't seen that info explicitly stated yet. Eagerly awaiting reviews. I'm ready to order except this sRGB thing is bothering me.

 

jeremyshaw
802.11n
Posts: 145
Registered: ‎07-13-2018
Location: US
Views: 5,956
Message 44 of 86

Re: T490 & T590 - First Look (review, benchmarks)


@Boogey wrote:

"400 nit FHD displays are the newer ones, but there are two:

Low power (800:1 contrast ratio)

Privacy (1000:1 contrast ratio)

 

Both claim ~100% sRGB (which is good, compared to the 300nit FHD panel)."

 

Where is this "100% sRGB" claim?

 

I've been scouring T490 info for weeks and haven't seen that info explicitly stated yet. Eagerly awaiting reviews. I'm ready to order except this sRGB thing is bothering me.

 


In the PSREF, Lenovo claims "72% gamut"

http://psref.lenovo.com/syspool/Sys/PDF/ThinkPad/ThinkPad%20T490/ThinkPad_T490_Platform_Specificatio...

Usually, unless specified elsewhere, Lenovo means 72% of NTSC gamut, which corrosponds to ~100% sRGB.

 

That being said, it is always possible that Lenovo has changed how they rate gamut. However, the "45% gamut" claim for the lower end panels lines up perfectly with the T480 specs for (what appear to be) the same panels (pertaining only to the lower spec FHD, FHD touch, and HD panels).

seven21
Fanfold Paper
Posts: 8
Registered: ‎02-26-2019
Location: SG
Views: 5,952
Message 45 of 86

Re: T490 & T590 - First Look (review, benchmarks)

Good to hear about the 400nits FHD having 100% sRGB, the 800:1 contrast ratio is considered sufficient for image editing. 

 

I'm still waiting for the 16gb soldered RAM to be available (stupid move for lenovo in my opinion to solder one of the rams).

SEAJ
Paper Tape
Posts: 1
Registered: ‎04-14-2019
Location: TH
Views: 5,893
Message 46 of 86

Re: T490 & T590 - First Look (review, benchmarks)

Are you sure the TB3 is only 2 lanes?  This site

 

https://www.myfixguide.com/thunderbolt-3-laptops/

 

claims it has 4 lanes. I would be a bit surprised and disappointed if it had only 2 lanes, given that one of the improvements of Whiskey Lake is the increased number of PCIe lanes.

 

Edited: this also says 4 lanes

https://www.reddit.com/r/thinkpad/comments/b8p13h/question_about_the_t_series_t490s/ek5x7q3/?utm_sou...

 

Edited again: to answer my own question, this screenshot from Reddit confirms 2 lanes, which is a big disappointment:

https://i.imgur.com/M2fenC3.png

https://www.reddit.com/r/thinkpad/comments/bbbowg/i_joined_the_thinkpad_club_t490/ekhyoec/?utm_sourc...

jeremyshaw
802.11n
Posts: 145
Registered: ‎07-13-2018
Location: US
Views: 5,874
Message 47 of 86

Re: T490 & T590 - First Look (review, benchmarks)


@SEAJ wrote:

Are you sure the TB3 is only 2 lanes?  This site

 

https://www.myfixguide.com/thunderbolt-3-laptops/

 

claims it has 4 lanes. I would be a bit surprised and disappointed if it had only 2 lanes, given that one of the improvements of Whiskey Lake is the increased number of PCIe lanes.

 

Edited: this also says 4 lanes

https://www.reddit.com/r/thinkpad/comments/b8p13h/question_about_the_t_series_t490s/ek5x7q3/?utm_sou...

 

Edited again: to answer my own question, this screenshot from Reddit confirms 2 lanes, which is a big disappointment:

https://i.imgur.com/M2fenC3.png

https://www.reddit.com/r/thinkpad/comments/bbbowg/i_joined_the_thinkpad_club_t490/ekhyoec/?utm_sourc...


That is disappointing to see confirmed.

 

When I was calculating the PCIe lane usage, I did not know if the CNVi wifi card took up 1x PCIe lane (and also 1x PCIe port). I have to assume for compatibility purposes, one lane and one port are sitll assigned, to allow existing M.2 cards to work. At least prior implmentations have allowed for it. That being said, the T490 WiFi is soldered onto the board, so it does not have to allow for M.2 PCIe compatibility. This still leaves the question of how Intel handles the CVNi connection. Given their papers on CVNi connections (admmitedly, in this case, I only know that information as compiled by WikiChip), it appears to not be routed over the PCIe host (the Ethernet MAC --> PHY connection is routed over PCIe).

 

 

 

 

 

 

The topology on that screenshotted T490 (I am rescaling the port numbers for ease of reading):

Intel seperates (at least commonly does) their PCIe lane allocations from the PCH into blocks of 4. Each block of 4 can have 4x1, 2x2, 1x4, 2x1+1x2, afaik.

 

First block of 4 (lanes 1-4):

PCIe port 1, 1x lane (lane #1): Genesys Logic SD card reader

 

Second block of 4 (lanes 5-8):

PCIe port 2, 2x lanes (lane: Intel TB3 (assumed, since when nothing is triggering TB3, the controller is "disconnected")

PCIe port 3, 1x lane: Assumed Intel LTE modem. I may be wrong.

 

Third block of 4 (lanes 9-12):

PCIe port 4, 4x lanes: Nvidia dGPU! Smiley Happy

 

Fourth block of 4 (lanes 13-16):

PCIe port 5, 4x lanes: NVMe SSD (Toshiba in this case)

 

Somewhere in the first or second block, is the Intel GbE controller. It will take one PCIe lane at half speed and one port. This will account for all 6 available PCIe ports on the PCH.

 

Please note, since Intel has never updated their public specification documents w.r.t. the Cannon Lake PCH (the 14nm PCH used by Whiskey Lake), I don't know if any of the rules have changed - especially the CVNi connection specifics.

 

If you want, you may find those documents here:

 

https://www.intel.com/content/www/us/en/products/docs/processors/core/core-technical-resources.html

 

 

The point is, if CVNi still acts as a PCie lane + port taken away, then it was probably an escape routing conflict that still reduced the TB3 down to 2x lanes (the cynical assumtion may also be the 2x lane TB3 controller is cheaper...). Though this assumption would require the Cannon Lake PCH to have one more PCIe port than its Skylake/KabyLake PCH predecessor (Kaby Lake PCH added HDCP 2.2 compliance somehow, iirc, but was otherwise identical in layout).

JoanGomez
Punch Card
Posts: 14
Registered: ‎01-05-2019
Location: AD
Views: 5,845
Message 48 of 86

Re: T490 & T590 - First Look (review, benchmarks)

you can do a disk test with CrystalDiskMark 6.0.2 ?

 

 

according to this it seems that finally it is pcie x4

 

95d06c4ffd717cdbf10ef8434f2420bd

Highlighted
jeremyshaw
802.11n
Posts: 145
Registered: ‎07-13-2018
Location: US
Views: 5,822
Message 49 of 86

Re: T490 & T590 - First Look (review, benchmarks)

Well, the screenshot from the reddit link two posts above notes 4 PCIe lanes dedicated to the NVMe SSD.

 

Also 4x lanes to the dGPU.

 

Only the TB3 controller gets 2x lanes.

MimmoGA
Paper Tape
Posts: 1
Registered: ‎04-12-2019
Location: IT
Views: 5,803
Message 50 of 86

Re: T490 & T590 - First Look (review, benchmarks)

Between 400 nit FHD displays low power (800:1 contrast ratio) and Privacy (1000:1 contrast ratio) there are differences as battery drain?

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