08-16-2019 08:54 PM - edited 08-16-2019 09:09 PM
So if you own the Xeon 2276 processor with your P series, can you do a little test?
Download throttlestop here: https://www.techpowerup.com/download/techpowerup-throttlestop/
In the FIVR tab, click that and on the bottom left, there will be a "multipliers" window
Here's an image for reference: https://i.imgur.com/3kRmPd4.png
Can you actually change the multipliers? Does it have any effect on the CPU speed if you adjust UP or DOWN the all core multiplier?
You can run a small stress test program on the TS Bench menu to see the CPU speed under stress test: https://i.imgur.com/yeWTSYN.png
Alternatively if you prefer Intel XTU, can you change multipliers? If you have changed them, have they made any difference in processor speed when you run stress test?
Image for reference in Intel XTU: https://i.imgur.com/KmbZ4qG.png
Thanks in advance.
08-17-2019 02:36 AM
I have a P52 with Xeon E2176M and I cannot change the multiplier.
But I saw the official intel website said it was capable of that.
So I am wondering its lenovo's restriction.
I had a P52 with 8850H before, with it I can change the multiplier easily, and I found it has a significant effect on Cinebench scores, of course you need to modify fan speed control with software like TPFancontrol to avoid thermal throttling coming too early.
08-17-2019 01:25 PM
08-17-2019 10:30 PM - edited 08-17-2019 10:31 PM
Thanks for the reply.
I am not looking to overclock the CPU, but actually to limit the all core boost to a more realistic value.
For example, the 2176 on the P52 is opportunistically set to 4.1GHz on all cores, which is not attainable on regular thermal paste even with the fanspeed set to 64. It would be nice to be able to limit that to 3.6 or 3.5GHz and reduce or remove clock throttling due to thermal or VRM throttling.
However the 7820HQ, 8850H, 8750H can have their multiplier adjusted DOWN to reduce their turbo speeds.
Yes I have verified that the 2176 in the P52 is locked.
I also had two P71 with 1505 and 1535 and the multipliers cannot be adjusted.
08-17-2019 10:37 PM
Hi uncle, thanks for the reply.
Yes I know the 8750H cannot have its multiplier "overclocked" so to speak, but it can be adjusted down. I have tried this with an Acer Predator Helios 300 8750/1060N.
I am not looking to overclock the 2267, but rather to limit its boost speed to a reasonable amount (lets say 3.5-3.6GHz all 6 cores) so that it does not overheat when stressed with a multi core workload.
So I'm asking people who own the 2276 to check.
Since the 9850H is not available (same CPU as 2276) I might want to get the 2276, however if the multiplier is not adjustable on the 2276 then it might be worth to wait a bit longer for it to be available.
Both the P53 and P73 parts website list the 16G video card with the 2276 and the 9850H.
09-09-2019 01:26 PM - edited 09-09-2019 01:27 PM
All multipliers are locked on my P73 with E-2276M,
I can change turbo boost power, bursts, duration, do some cache adjustments
But multipliers are locked :-(
Using Intel Utility
Also system struggles with thermals a bit
In stock, system purshes frequencies quite aggresively, i see 4.7 rather often
09-09-2019 01:41 PM
Here is screen shot
Hope this helps
09-17-2019 02:38 PM - edited 09-17-2019 02:39 PM
What would be the benefit? I thought that the CPU would automatically lower it's Turbo-boost frequency to limit heat generation?
On my P52 (i7-8750H), there is thermal throttle only in the first few seconds after starting an intensive load, and then only on a cool machine. On a hot machine, Turbo-boost limit itself to a lower, stable frequency, with no throttle?
Trying to better understand,