#Legion T7 34IRZ8 90V6000TUS - NVMe Slots on MB Mapping Help

10 messages · Page 1 of 1 (latest)

jade mesa
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Model: 90V6000TUS
Issue: Looking for NVMe Drive Mapping on Motherboard - Which Slot(s) are CPU and which are GPU?

Just got this great machine last week. I am looking for the details on the 3 Nvme usable slots on the MB, which one or ones map to the CPU and which do not?

What have I tried already:

  1. I've reached out to Support in Chat, since I purchased the Ultimate Warranty Package, they said the information is not available, that they only support something not working, or broken, but not "Tech Support".
  2. The current PSREF is Aug 2024 but doesn't specify any of this, only 3 NVME for Drives, 1 for WIFI / BT
  3. They suggested I use the Forums for Support Questions, so I have posted 2x there, but so far I had only gotten the suggestion to "contact support" and "use the Lenovo Vantage app".
  4. Support is Premium Care Warranty Support and they have told me both times they can't help me.

I do see volumes of technical discussions around XMP settings on this model with 2 vs 4 sticks and the newer Intel updates and much detailed technical talk, so I believe I am just not reaching out correctly.

Any help or direction would be much appreciated.

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wet silo
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Also, your question doesn’t even make sense honestly

jade mesa
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ok. Thanks. That is super helpful.

wet silo
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Nvme slots would all connect to the cpu. None would connect to the GPU

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Make sense?

jade mesa
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For performance and considering bottlenecks, my use case involves MAX perf for the NVMe drive, not having it shared with the GPU (4080 Super). Many conversations about knowing which is which, and when GPU is top priority, gaming at max perf for example, then this question is not important. So since I have a use case where CPU/Drive Perf is more important, I was looking for that information. I can quote a bunch of technical articles if it would help to make my point. Sometimes Motherboard MFG will follow the rule "slot closest physically to the CPU" is the fast lane, and often the one. The rest are "Shared and slower lanes". So was thinking, considering many buy this model for the top end CPU and GPU, it could be known somewhere.

wet silo
jade mesa
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Ok. Some tech discussion with HW Experts at my work said this, which is what I was tracking also: Based on the information from the PSREF documents for your Legion T7 34IRZ8 90V6000TUS, the system includes the following key details about the NVMe slots:

The four M.2 slots consist of:
One designated for WLAN (for Wi-Fi and Bluetooth).
Three available for M.2 SSDs (NVMe storage).
Regarding the PCIe lanes:

The Intel Z790 chipset supports PCIe 4.0 and 5.0 connections.
Typically, in setups like this, one of the NVMe M.2 slots will be directly connected to the CPU via PCIe 4.0 x4 lanes, ensuring maximum performance, while the other slots are routed through the chipset (Z790), which may share bandwidth with other components like the GPU or other peripheral devices​​.
To determine exactly which M.2 slot is CPU-connected, Lenovo's general motherboard design for this model often follows this pattern:

M.2 Slot 1 (closest to the CPU) is usually tied directly to the CPU via PCIe 4.0 x4 lanes.
The other two M.2 slots (M.2 Slot 2 and Slot 3) are connected via the Z790 chipset.
If you'd like to confirm this layout definitively, you can use the following methods:

BIOS/UEFI: Check for configuration information in the BIOS that might detail which slot is using CPU lanes.
System tools: Use a tool like HWINFO to identify which slot is running over PCIe lanes tied to the CPU (usually listed as PCIe 4.0 directly from the CPU).