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Repasting a P72

2020-08-14, 21:59 PM

Having put time into researching performance I now have reached the conclusion that only repasting could make the Xeon perform as advertised (not just 4+GHz when idling, 4GHz when actually doing some work)..
Has anyone else done this before, caveats/pitfalls?

Watching this video - a lot of screws, a lot of turning it upside down and again (assuming the P52 is somewhat like the P72).
 

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P72 Xeon 96GB | 2019 MBP 13 i7 16GB
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2361 Posts

04-20-2008

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Re:Repasting a P72

2020-08-16, 12:07 PM

Have you made a run with HWINFO64 to see the CPU thermal load encountered when you are running your application? Look at the sensor report to determine the thermal throttling present.


P53 XEON 2276 BIOS 1.23 OLED UHD 4K Multi-touch display, 96GB RAM, RTX5000, RAID 1, 1TB x 2 Samsung PM981, 1TB PM981, WWAN
P70 XEON 1505, BIOS 2.35, 4k Display, 64GB, M3000M NVIDIA GPU, RAID1 1TB Samsung PM981 PCIe-NVMe SSD x 2, 2x Samsung 850 Pro 1TB SSD. EM7455 WWAN
P1. BIOS 1.25,Xeon Processor, 4k UHD IPS multi-touch display, 32GB, PM981 1TB x 2, RAID1

I am not an employee nor an agent of Lenovo.
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68 Posts

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Re:Repasting a P72

2020-08-16, 14:04 PM

Yes, building the solution I work on in Visual Studio, the CPU starts out at 4.1GHz but 25 seconds later it‘s throttled down to about 3.3GHz.
Running a relatively beefy VM also throttles the CPU quite badly.


P72 Xeon 96GB | 2019 MBP 13 i7 16GB
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Re:Repasting a P72

2020-08-16, 17:48 PM

Have you tried to under volting the CPU using the Intel Extreme Tuning Utility? Repasting the CPU/GPU is a real PITA. If you are going forward with that approach, then do not use Liquid Metal Thermal paste,

 

https://downloadcenter.intel.com/download/29183/Intel-Extreme-Tuning-Utility-Intel-XTU-


P53 XEON 2276 BIOS 1.23 OLED UHD 4K Multi-touch display, 96GB RAM, RTX5000, RAID 1, 1TB x 2 Samsung PM981, 1TB PM981, WWAN
P70 XEON 1505, BIOS 2.35, 4k Display, 64GB, M3000M NVIDIA GPU, RAID1 1TB Samsung PM981 PCIe-NVMe SSD x 2, 2x Samsung 850 Pro 1TB SSD. EM7455 WWAN
P1. BIOS 1.25,Xeon Processor, 4k UHD IPS multi-touch display, 32GB, PM981 1TB x 2, RAID1

I am not an employee nor an agent of Lenovo.
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Re:Repasting a P72

2020-08-16, 18:58 PM

Aye, I usually run it at -0.120, which gives me about 500MHz from stock.  Interestingly though, whilst running a stress test recently, if I check test AES it crashes.  Seems like those registers for AES are more sensitive to undervolting than the rest!


P72 Xeon 96GB | 2019 MBP 13 i7 16GB
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Re:Repasting a P72

2020-08-21, 22:00 PM

Not sure if the paste or just cleaning out the fans contributed more to the temp dropping about 25 degrees on average and thermal throttling now not happening.


P72 Xeon 96GB | 2019 MBP 13 i7 16GB

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