# New NVME Base Duo cannot use gen3 on pi5?

**URL:** <https://forums.pimoroni.com/t/new-nvme-base-duo-cannot-use-gen3-on-pi5/27431>\
**Category:** Support\
**Created:** [March 5, 2025, 10:56pm UTC](https://forums.pimoroni.com/t/new-nvme-base-duo-cannot-use-gen3-on-pi5/27431 "2025-03-05T22:56:45Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Jibun-no-Kage](https://avatars.discourse-cdn.com/v4/letter/j/f19dbf/32.png) [@Jibun-no-Kage](https://forums.pimoroni.com/u/Jibun-no-Kage)\
**Post date:** [March 5, 2025, 10:56pm UTC](https://forums.pimoroni.com/t/new-nvme-base-duo-cannot-use-gen3-on-pi5/27431/1 "2025-03-05T22:56:45Z")

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New NVME Base Duo cannot use gen3 on pi5?

I set the parameters in the config.txt file…

```auto
[pi5]
dtparam=nvme
dtparam=pciex1_gen=3

```

But on reboot dmesg shows…

```auto
[0.355188] brcm-pcie 1000110000.pcie: host bridge /axi/pcie@110000 ranges:
[0.355522] brcm-pcie 1000110000.pcie: No bus range found for /axi/pcie@110000, using [bus 00-ff]
[0.355857] brcm-pcie 1000110000.pcie: MEM 0x1b80000000..0x1bffffffff -> 0x0080000000
[0.356188] brcm-pcie 1000110000.pcie: MEM 0x1800000000..0x1b7fffffff -> 0x0400000000
[0.356516] brcm-pcie 1000110000.pcie: IB MEM 0x0000000000..0x0fffffffff -> 0x1000000000
[0.358530] brcm-pcie 1000110000.pcie: PCI host bridge to bus 0000:00
**[0.362362] brcm-pcie 1000110000.pcie: Forcing gen 3**
[0.464614] brcm-pcie 1000110000.pcie: clkreq-mode set to default
[0.464933] brcm-pcie 1000110000.pcie: link up, 5.0 GT/s PCIe x1 (!SSC)
[0.504045] pcieport 0000:00:00.0: enabling device (0000 -> 0002)
[0.504418] pcieport 0000:00:00.0: PME: Signaling with IRQ 38
[0.504811] pcieport 0000:00:00.0: AER: enabled with IRQ 38
[0.505204] pcieport 0000:01:00.0: enabling device (0000 -> 0002)
[0.505635] pcieport 0000:02:03.0: enabling device (0000 -> 0002)
[0.506088] pcieport 0000:02:07.0: enabling device (0000 -> 0002)
[0.684588] brcm-pcie 1000120000.pcie: host bridge /axi/pcie@120000 ranges:
[0.684947] brcm-pcie 1000120000.pcie: No bus range found for /axi/pcie@120000, using [bus 00-ff]
[0.685302] brcm-pcie 1000120000.pcie: MEM 0x1f00000000..0x1ffffffffb -> 0x0000000000
[0.685658] brcm-pcie 1000120000.pcie: MEM 0x1c00000000..0x1effffffff -> 0x0400000000
[0.686010] brcm-pcie 1000120000.pcie: IB MEM 0x1f00000000..0x1f003fffff -> 0x0000000000
[0.686360] brcm-pcie 1000120000.pcie: IB MEM 0x0000000000..0x0fffffffff -> 0x1000000000
[0.688194] brcm-pcie 1000120000.pcie: PCI host bridge to bus 0001:00
**[0.691910] brcm-pcie 1000120000.pcie: Forcing gen 2**
[0.792611] brcm-pcie 1000120000.pcie: clkreq-mode set to default
[0.792919] brcm-pcie 1000120000.pcie: link up, 5.0 GT/s PCIe x4 (!SSC)
[0.804362] pcieport 0001:00:00.0: enabling device (0000 -> 0002)
[0.804710] pcieport 0001:00:00.0: PME: Signaling with IRQ 48
[0.805069] pcieport 0001:00:00.0: AER: enabled with IRQ 48

```

And when I do speed testing via hdparm speeds are the same for gen2 and gen3… looks like the bus for the 2nd NVME slot is reverting back to gen2? See above.

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<div class="post-metadata">

**Author:** ![bablokb](https://avatars.discourse-cdn.com/v4/letter/b/ee59a6/32.png) [@bablokb](https://forums.pimoroni.com/u/bablokb)\
**Post date:** [March 7, 2025, 10:24am UTC](https://forums.pimoroni.com/t/new-nvme-base-duo-cannot-use-gen3-on-pi5/27431/2 "2025-03-07T10:24:55Z")

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The docs in the shop state that it is a Gen2 expansion board.