PHVM_BR

To take advantage of that 250W CPU limit, I'm afraid even liquid cooling won't be enough. Perhaps LM + liquid cooling would be possible for short/medium duration loads, but the heatsink has aluminum parts, and caution is needed in choosing the solution for its application...

Try Custom with maximum settings / fan boost and Overboost Extreme.

Time Spy is an older benchmark and doesn't scale well with Core Ultra CPUs. Furthermore, memory makes all the difference in CPU scores, and it seems that with the i9-13900HX you used 6400MT/s modules while with the 275HX you used 5600MT/s. With VBS disabled, stock memory (5600MHz CL46) and stock CPU, I reached up to ~17700. Everything remained the same, but with CPU undervolting and an IETS GT600, the CPU score increased to ~18500. And finally, with memory adjusted to 6400MT/s CL36, I now reach up to ~21900. I've seen scores of ~24k with faster memory. Regarding the GPU, its score with the 4090 is good, slightly below its maximum overclocking potential (up to ~24.5k), but its score with the 5090 is not so good... With a well-tuned overclock, it should be able to exceed 27k and perhaps even 28k with a good cooling pad

My settings were all tested in several tests over a few hours. Everything is 100% stable until then... Regarding the cache, initially I kept it at 3.8GHz with an undervolt of -80mV, but I realized during testing that the undervolt on the cache delivered practically no benefits (maybe 1 to 2W less at full load). Then I tried overclocking in XTU and discovered that for 4.0GHz it was enough to maintain the original voltage, without undervolting. With the ring at 3.8 GHz and everything else the same, I get about ~86 ns. I believe that with Hynix A-die single rank it's possible to achieve 7600MT/s CL36 and latency below 80ns. We'll see... I'm waiting for a reasonable price to buy 2x16gb Fury Impact 6400MT/s CL38 and test it. As for the BIOS update, I haven't updated to the XMG BIOS yet for fear of something going wrong, but I've seen several reports that it works.

I'm currently using the XMG CC, but it's identical to the Avell one. I haven't noticed any differences...

168 = 5600 192 = 6400 204 = 6800 ...

To enable the XMP profile in the BIOS, you need memory modules with XMP profiles. To manually adjust the memory, XMP memory modules are not necessary. Change the profile to manual and adjust the settings. Simply changing the target memory frequency is not effective.

Not yet, I just select all P-cores (or all E-cores) and set the undervolt.

I have tREFI = 24576 To achieve 84ns I have: NGU = 3.0GHz D2D = 3.1GHz Cache = 4.0GHz For me, overclock the ring to 4.0GHz decreased the latency by ~2ns. Is it possible to get the Premamod BIOS without an Eluktronics laptop? I messaged Prema about this, but haven't received a response... I really want the higher power limit (250W vs 210W), as well as the extra adjustment options.

I don't have my laptop with me right now. I can post tomorrow or the day after, but there's no secret. Undervolt the P-core, undervolt the E-core, undervolt and/or overclock the cache, ICCMax = Unlimited on both the iGPU and the CPU.

You must disable virtualization in the BIOS. Core isolation is disabled in Windows. The XTU version compatible with Core Ultra (Arrow Lake) is version 10xxx. The version you are trying to use, 7xxx, is compatible with older generation CPUs.

I use adaptive voltage. XTU is a heavier software than Throttlestop, so I recommend applying all settings and then closing the program. Your settings will remain until the system is turned off or restarted. If Throttlestop works better for you, use it! I've always used and preferred Throttlestop, but I switched to XTU with this system because of the extra adjustment possibilities. I don't have a liquid cooling system and I use an IETS GT600. I've tested Steel Nomad a little and haven't yet fine-tuned the system for this benchmark: https://www.3dmark.com/sn/12124446

Have you disabled Windows Core Isolation and virtualization features in the BIOS? Which version of XTU are you trying to use?

Yes, I use Afterburner. In the advanced BIOS tab, which is unlocked by checking the option in the manual settings of the Control Center, you adjust the memory and unlock undervolt protection. If you've never adjusted memory before, I recommend doing some research first. Generally, if the adjustment doesn't POST, the system itself reverts the changes and restarts Windows after a few minutes of trying to train the memory. If the system doesn't restart automatically, simply restore the factory settings: With the charger disconnected, press and hold Ctrl + F11 and click the power button for a few seconds. When the keyboard starts flashing, you can release Ctrl and F11. Wait a few minutes and the system will restart with the default settings.

Overclocked GPU! How much depends on the application... for example, in Time Spy I get +450MHz, while in Fire Strike the limit is +430MHz... For games I keep it at +400MHz to have a safe margin and not have to worry. VRAM always supports +3000MHz. I want to update to the XMG BIOS but I haven't done it yet. To get good results, just unlock the advanced BIOS menu through the Control Center and unlock the CPU undervolt and adjust the memory, in addition to the GPU overclock. I use XTU for CPU undervolt because with it you can adjust the P-cores and E-cores separately. On my CPU, -60mV on the P-cores is stable, limiting it to 5.2GHz, while on the E-cores at 4.6GHz I use -75mV, also completely stable. I have 2x32GB of SODIMM memory, therefore the modules are dual rank, more limited for adjustment. I achieved a stable 6400MT/s CL36-39-39-54 at 1.3V. I tried 6800MT/s at 1.35V but it didn't POST. I stopped there... With single-rank memory, 7200 or 7600MT/s at 1.35V should be easily achievable.