A positive post about Lenovo (although let's see how it will hold up ;))

Since yesterday I have this stunning device.

Specs: Lenovo C940 15 Inch / i7 / 16 GB RAM / 1 TB SSD / Nvidia Geforce 1650 / 4k/UHD display

My first impressions:

- Wow, this laptop is all about design and quality! Really solid build en very nice to hold.

- The 4k display is just blowing me away. Ofcourse the blacks are not OLED like but still very good. Colors look very vibrant and brightness is insane!

- The keyboard is one of the best I have had on a laptop, also the trackpad feels really good and accurate

- The Pen works ok. Nice and precize drawings and almost no lag. But holding it feels a bit "tiny and cheap". I like my surface pen more. But the Lenovo Pen has a garage and built-in battery which is cool

- Battery performance is hard to say since I have it one day. But yesterday I was installing windows updates and other intensive stuff and after 3 hours it dropped to 45%. So I expect that 5 hours on average workload is possible and maybe around 7 hours with light work and lower brightsness. So this is okay for me.

- Performance, its just fast as expected. Not planning to do heavy gaming but it's nice to have some extra power when needed.

So if you have any questions, just ask!

Hi , 

Congratulations on your new Computer.

A good choice on specifications and aesthetic wise, and is absolutely stunning :O

Feel free to share your experience with this amazing device to your fellow community members. 

Jeremy

I have the i9 2TB Lenovo C940 15in and the build quality is fantastic. Laptop is very solid and the sound is the best I've had in any laptop. My only disapointment is the 500 nit 4k display. I see thin grey lines in the background especially with light colors. White is a bright light grey. I have called tech support and they are sending another laptop to replace this one. The only one I could compare was a 14in 4k C940 in Best Buy and it was better and whites looked white. I would think these are the same panels just different sizes. Keeping my fingers crossed the replacment fixes it. Other than that I really like this laptop. Thanks

Hi Renzo,

Congrats on your beautiful new laptop. I’m also considering the c940 but I was wondering if you can check something for me. My laptop is ment for Music production so dpc latency needs to be as low as possible. Unfortunatly allot of them suffer from this issue and its impossible to tell beforehand unless there is a review. Could you, or anyone else with a 15 inch c940, run Latency MON for about 15 to 20 mins and post the results? 

Thank you very much and have fun with your new c940!

with warm regards,

Shourin

Hi. Did a test (was in the background for aprox 10 minutes). Hopefully you can use the logging:

CONCLUSION
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Your system appears to be suitable for handling real-time audio and other tasks without dropouts.
LatencyMon has been analyzing your system for 0:10:55 (h:mm:ss) on all processors.

_________________________________________________________________________________________________________
SYSTEM INFORMATION
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Computer name: SALVES-R90WC93G
OS version: Windows 10 , 10.0, build: 18363 (x64)
Hardware: 81TE, LENOVO, LNVNB161216
CPU: GenuineIntel Intel(R) Core(TM) i7-9750H CPU @ 2.60GHz
Logical processors: 12
Processor groups: 1
RAM: 16142 MB total

_________________________________________________________________________________________________________
CPU SPEED
_________________________________________________________________________________________________________
Reported CPU speed: 2592 MHz

Note: reported execution times may be calculated based on a fixed reported CPU speed. Disable variable speed settings like Intel Speed Step and AMD Cool N Quiet in the BIOS setup for more accurate results.

WARNING: the CPU speed that was measured is only a fraction of the CPU speed reported. Your CPUs may be throttled back due to variable speed settings and thermal issues. It is suggested that you run a utility which reports your actual CPU frequency and temperature.

_________________________________________________________________________________________________________
MEASURED INTERRUPT TO USER PROCESS LATENCIES
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The interrupt to process latency reflects the measured interval that a usermode process needed to respond to a hardware request from the moment the interrupt service routine started execution. This includes the scheduling and execution of a DPC routine, the signaling of an event and the waking up of a usermode thread from an idle wait state in response to that event.

Highest measured interrupt to process latency (µs): 494,20
Average measured interrupt to process latency (µs): 4,374816

Highest measured interrupt to DPC latency (µs): 438,60
Average measured interrupt to DPC latency (µs): 1,416069

_________________________________________________________________________________________________________
REPORTED ISRs
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Interrupt service routines are routines installed by the OS and device drivers that execute in response to a hardware interrupt signal.

Highest ISR routine execution time (µs): 191,455247
Driver with highest ISR routine execution time: Wdf01000.sys - Kernel Mode Driver Framework-runtime, Microsoft Corporation

Highest reported total ISR routine time (%): 0,005440
Driver with highest ISR total time: Wdf01000.sys - Kernel Mode Driver Framework-runtime, Microsoft Corporation

Total time spent in ISRs (%) 0,005440

ISR count (execution time <250 µs): 35663
ISR count (execution time 250-500 µs): 0
ISR count (execution time 500-999 µs): 0
ISR count (execution time 1000-1999 µs): 0
ISR count (execution time 2000-3999 µs): 0
ISR count (execution time >=4000 µs): 0

_________________________________________________________________________________________________________
REPORTED DPCs
_________________________________________________________________________________________________________
DPC routines are part of the interrupt servicing dispatch mechanism and disable the possibility for a process to utilize the CPU while it is interrupted until the DPC has finished execution.

Highest DPC routine execution time (µs): 500,551698
Driver with highest DPC routine execution time: dxgkrnl.sys - DirectX Graphics Kernel, Microsoft Corporation

Highest reported total DPC routine time (%): 0,030520
Driver with highest DPC total execution time: dxgkrnl.sys - DirectX Graphics Kernel, Microsoft Corporation

Total time spent in DPCs (%) 0,078534

DPC count (execution time <250 µs): 1711239
DPC count (execution time 250-500 µs): 0
DPC count (execution time 500-999 µs): 116
DPC count (execution time 1000-1999 µs): 0
DPC count (execution time 2000-3999 µs): 0
DPC count (execution time >=4000 µs): 0

_________________________________________________________________________________________________________
REPORTED HARD PAGEFAULTS
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Hard pagefaults are events that get triggered by making use of virtual memory that is not resident in RAM but backed by a memory mapped file on disk. The process of resolving the hard pagefault requires reading in the memory from disk while the process is interrupted and blocked from execution.

NOTE: some processes were hit by hard pagefaults. If these were programs producing audio, they are likely to interrupt the audio stream resulting in dropouts, clicks and pops. Check the Processes tab to see which programs were hit.

Process with highest pagefault count: chrome.exe

Total number of hard pagefaults 328
Hard pagefault count of hardest hit process: 98
Number of processes hit: 14

_________________________________________________________________________________________________________
PER CPU DATA
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CPU 0 Interrupt cycle time (s): 35,889625
CPU 0 ISR highest execution time (µs): 191,455247
CPU 0 ISR total execution time (s): 0,427247
CPU 0 ISR count: 35622
CPU 0 DPC highest execution time (µs): 500,551698
CPU 0 DPC total execution time (s): 5,679054
CPU 0 DPC count: 1656311
_________________________________________________________________________________________________________
CPU 1 Interrupt cycle time (s): 38,999680
CPU 1 ISR highest execution time (µs): 46,777778
CPU 1 ISR total execution time (s): 0,000365
CPU 1 ISR count: 37
CPU 1 DPC highest execution time (µs): 310,706790
CPU 1 DPC total execution time (s): 0,140028
CPU 1 DPC count: 8552
_________________________________________________________________________________________________________
CPU 2 Interrupt cycle time (s): 19,264191
CPU 2 ISR highest execution time (µs): 10,456019
CPU 2 ISR total execution time (s): 0,000019
CPU 2 ISR count: 4
CPU 2 DPC highest execution time (µs): 381,248457
CPU 2 DPC total execution time (s): 0,038250
CPU 2 DPC count: 5564
_________________________________________________________________________________________________________
CPU 3 Interrupt cycle time (s): 23,090378
CPU 3 ISR highest execution time (µs): 0,0
CPU 3 ISR total execution time (s): 0,0
CPU 3 ISR count: 0
CPU 3 DPC highest execution time (µs): 385,158951
CPU 3 DPC total execution time (s): 0,024860
CPU 3 DPC count: 1876
_________________________________________________________________________________________________________
CPU 4 Interrupt cycle time (s): 21,403874
CPU 4 ISR highest execution time (µs): 0,0
CPU 4 ISR total execution time (s): 0,0
CPU 4 ISR count: 0
CPU 4 DPC highest execution time (µs): 332,481481
CPU 4 DPC total execution time (s): 0,047586
CPU 4 DPC count: 6847
_________________________________________________________________________________________________________
CPU 5 Interrupt cycle time (s): 22,370293
CPU 5 ISR highest execution time (µs): 0,0
CPU 5 ISR total execution time (s): 0,0
CPU 5 ISR count: 0
CPU 5 DPC highest execution time (µs): 267,702932
CPU 5 DPC total execution time (s): 0,022385
CPU 5 DPC count: 2882
_________________________________________________________________________________________________________
CPU 6 Interrupt cycle time (s): 19,289498
CPU 6 ISR highest execution time (µs): 0,0
CPU 6 ISR total execution time (s): 0,0
CPU 6 ISR count: 0
CPU 6 DPC highest execution time (µs): 315,318673
CPU 6 DPC total execution time (s): 0,044069
CPU 6 DPC count: 5736
_________________________________________________________________________________________________________
CPU 7 Interrupt cycle time (s): 19,279511
CPU 7 ISR highest execution time (µs): 0,0
CPU 7 ISR total execution time (s): 0,0
CPU 7 ISR count: 0
CPU 7 DPC highest execution time (µs): 187,294753
CPU 7 DPC total execution time (s): 0,017721
CPU 7 DPC count: 1830
_________________________________________________________________________________________________________
CPU 8 Interrupt cycle time (s): 18,466816
CPU 8 ISR highest execution time (µs): 0,0
CPU 8 ISR total execution time (s): 0,0
CPU 8 ISR count: 0
CPU 8 DPC highest execution time (µs): 162,683642
CPU 8 DPC total execution time (s): 0,029071
CPU 8 DPC count: 4736
_________________________________________________________________________________________________________
CPU 9 Interrupt cycle time (s): 18,627363
CPU 9 ISR highest execution time (µs): 0,0
CPU 9 ISR total execution time (s): 0,0
CPU 9 ISR count: 0
CPU 9 DPC highest execution time (µs): 272,464506
CPU 9 DPC total execution time (s): 0,023136
CPU 9 DPC count: 2584
_________________________________________________________________________________________________________
CPU 10 Interrupt cycle time (s): 19,535068
CPU 10 ISR highest execution time (µs): 0,0
CPU 10 ISR total execution time (s): 0,0
CPU 10 ISR count: 0
CPU 10 DPC highest execution time (µs): 210,614969
CPU 10 DPC total execution time (s): 0,077035
CPU 10 DPC count: 11554
_________________________________________________________________________________________________________
CPU 11 Interrupt cycle time (s): 19,738654
CPU 11 ISR highest execution time (µs): 0,0
CPU 11 ISR total execution time (s): 0,0
CPU 11 ISR count: 0
CPU 11 DPC highest execution time (µs): 338,397377
CPU 11 DPC total execution time (s): 0,029754
CPU 11 DPC count: 2883

I send my 14 inch model back because of the anoying fans... How do you experience them on the 15 inch?

The 15" model has fans, and yes they do work ;)

Which means that you will hear them now and then. I'm using my laptop for 90% for business use (office like apllications) and the fans are running quietly in the background (I can only hear them when the room is completely silent). At some moments when you ask more performance you can defenitly hear the fans, most of the time they turn down fast.

I don't really mind but I can't decide this for you. Are you a heavy user (gaming, editting, etc) than you can expect the fans run alot louder and longer. There's only one way to check this, try it yourself and if it doesn't suit you return it.

Hi Shourin,

Did you order a c940?