Precision 7740/ 7540 specs / release date

I think that the issue is all here. Different ram timings/spec normally brings to bios error (even if theoretically it should adapt all the banks to the slower one).

 

Indeed, if you are going to keep the modules that came in the system then you need to make sure that the modules that you order have the same timings. If you mix timings, at best you end up with modules running at a slower speed than they should be (if the BIOS can find a set of timings that both modules support which doesn't always happen), or at worst you end up with a system that does not work.

 

Well, that settles it. I jumped to conclusion based off what I read on using these RAM sticks in previous generation models.

Can you guys point me to a guide on how to access the rest of the memory slots? Might give it a shot in the future.

 

Dell has all of the directions on their web site.
https://www.dell.com/support/manual...a4ae20-c1ac-46aa-b651-0036902349cf&lang=en-us

 

can someone explain to me why I do not have the option to set battery charge level on the long life 97W 3yr warranty battery? on my 7540
That was one of the things I really liked about the power management on dells, and wish that every mfg would let you set boundary for charge of battery, esp when you know that you will have it plugged in to AC for a long periods of time. AND the fact that you can not just flip the laptop and take out the battery with ease like the old models... so why Dell?

It has been proven that charging most modern batteries to 80% is the most optimal, so why not let me have a range ? but to completely disable it is stupid IMO

 

One thing I would advise is not to try to pull at the vent area's as Dell has it, but just start from the back and always have a plastic tool to pop the back and work toward the front... I did it based on how they had instructions on my first time, and I can see stress marks on the paint on the edge of those vents... They could have put numbers to show the direction from which you work your way. And my experience working from the back of the laptop toward the front is best and the cover pops at each area effortlessly

 

This has been the case for many generations. On the "regular" battery you can set these limits, but on the long-warranty battery you cannot. I suspect that the batteries are actually the same but they force a slow charge configuration for the long-warranty battery. Not sure why they would also eliminate the option to set the upper and lower charge bounds, though.

 

Is the option not present in BIOS?

 

If you have the extended warranty battery installed, most or all of the battery options disappear from the BIOS setup.

 

I had problems properly seating my two DDR3 3200 sticks.

The first time it would not Post
The second time seemed all find but randomly froze once or twice a day
The third time it failed internal diagnostic checks and was unstable
The fourth time only 16GB came up
The fifth time it would not Post
The sixth time was the charm and its been running great ever since.

This was the under keyboard slots. Maybe the slots on the bottom are not as finicky.