Nobble
1 Copper

RE: XPS 9550 Speed Shift - when will Dell enable via BIOS update?

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Agreed, would be nice to have the option.

titankm
1 Nickel

RE: XPS 9550 Speed Shift - when will Dell enable via BIOS update?

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Is it enabled in the BIOS og the 9360?

RE: XPS 9550 Speed Shift - when will Dell enable via BIOS update?

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Hey, in case anyone wants a work around I created a guide on how to automatically enable SST after startup, or sleep.

Tested and working on my 9550, let me know if you encounter any problems

gallery.technet.microsoft.com/Automatically-Enable-ad9c2208

asdfpoui
1 Nickel

RE: XPS 9550 Speed Shift - when will Dell enable via BIOS update?

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By the way, Speed Shift has a nifty option built in called Energy Performance Preference (EPP). Once Speed Shift is enabled, you can set EPP between "max performance" and "energy savings."  I would guess most systems would come from Dell (and others) with an EPP set for "medium" performance.

Simply writing to MSR 0x770 does not allow one to change EPP settings.

- ThrottleStop 8.3x provides direct access to EPP settings in the window labeled "Turbo Power Limits". That is the easiest workaround until Dell "updates" the BIOS

- I tried changing the EPP to "max performance" (EPP=0) via powercfg (and via an edited control panel>hardware and sound.power options...); both display updated "dummy" variables but don't actually execute any changes. So presumably EPP changes require writing to  MSR_HWP_REQUEST (MSR 0x774)

Setting EPP to 255 makes the system super laggy. Setting EPP to 0 makes the system significantly more snappy than it was without Speed Shift (or with Speed Shift enabled and EPP simply set at factory "medium" performance).

tunrip
1 Copper

RE: XPS 9550 Speed Shift - when will Dell enable via BIOS update?

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Good question. Any word from the lovely Dell Support peoples?

Samastrike
1 Nickel

RE: XPS 9550 Speed Shift - when will Dell enable via BIOS update?

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Would be great to finally see speed shift, it's been nearly a year now Dell surely you could have enabled it on your premium laptop line by now?

While I'm on the topic of stuff that could be done there's also the 4K screen flickering that was introduced in BIOS 1.2.10 and seems to have persisted in versions since. Fix this too please!

asdfpoui
1 Nickel

RE: XPS 9550 Speed Shift - when will Dell enable via BIOS update?

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One user said Dell did not enable speed step on his newly issued 9360 (Kaby Lake) XPS 13.

He took a screen shot of his BIOS and HWiNFO64 to demonstrate:

forum.notebookreview.com/.../page-2

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asdfpoui
1 Nickel

RE: XPS 9550 Speed Shift - when will Dell enable via BIOS update?

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One user shows Dell has NOT bothered to enable speed shift on his brand new Kaby Lake XPS 13 (9360) via screen shots of his BIOS:

forum.notebookreview.com/.../page-2

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Ken PC
2 Bronze

RE: XPS 9550 Speed Shift - when will Dell enable via BIOS update?

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SpeedShift may be helpful for improved battery life under light load conditions. This would be a great system to support in an updated Dell BIOS

7even7
1 Nickel

RE: XPS 9550 Speed Shift - when will Dell enable via BIOS update?

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Yes, I would also like SpeedShift, and the screen flickering issue resolved.