Dell Precision 7540 and 7740 Owner's Thread

Mine was from china, aliexpress, you can find it searching for 7X30 heatsink (it's the same for 7X40 models). Anyway mine cost me ~$70 and it's arrived not in perfect condition, so I can't really fully advise it.
For me it's better if you try the screw mod, before going for a completely new heatsink.

 

My order confirmation just came in and it says: -

15.6" UltraSharp FHD IPS, 1920x1080 AG, Touch, Cam/Mic, w/Prem Panel Guar 100% sRGB

I think the AG stands for Anti-Glare. The glossy ones are referred to as TrueLife. The manual says that the display is 72% Adobe RGB. But this one says 100% sRGB. I am hopeful that this is an upgraded display as compared to what is referred to in the manual and maybe does 400+ NITS... This will be ideal for me!!

 

Let us know if you end up with an anti-glare touchscreen. That would be a first for the Precision line, but maybe they have changed it with this iteration.

 

I tried today with my 7540 (i9 9980HK/RTX3000/ default 8GB ram/ BIOS 1.4.0/no repaste/ undervolt -130mV) and tracked the power load using Throttlestop while running cinebench 20. Turn out that the power limit are adjustable: you need to uncheck the "Disable and Lock Turbo Limits" option in FIVR.

I can thus set the Short and Long power max levels at 120/100 accordingly. The Cinebench score is 4362, although it reaches thermal throttle at this level, so I guess without repasting it is unsafe to run the laptop at this high power level.

 

Great catch. @Yves_ I think that you would be interested in this also.

 

I already try with the option "Disable and Lock Turbo Limits" unchecked and still can't pass 107W as maximum cap.
Bios 1.4.0, but 7740. No idea if there's something different in 7540 bios or in having discrete graphics onboard (mine is without).

Can you please make a screenshot where you go over 107W in the TS PKG power wattage?
Thanks.

 

Sure, this is the power consumption when Cinebench R20 is running (somehow the 120W short-run boost is reachable only with Cinebench R20, while with R15 it's lower).

Link: https://ibb.co/8MqXG7r

*Sorry, I tried but still do not figure out how to post a picture here.

 

Thanks. This is interesting. It would be really nice to understand where is the key point (hw/bios or driver/sw) in this difference..

 

7540 and 7740 have the same BIOS, or they take the same BIOS updates anyway (exact same file from Dell updates both systems)... This would be an interesting difference in behavior if it is actually different between the 7540 and 7740. (Need more data points! )

 

Thanks for sharing. IIRC, R20 supports AVX whereas R15 does not. This is probably what contributes to the increased power consumption in R20.