英特尔NUC的性能比同等系统差很多

我有两个Intel NUC系统：

2.4 GHz i3-7100U（2.40 GHz-3MB高速缓存-2核-4线程）
2GB MHz时4 GB DDR4（1×4 GB）
250 GB NVMe PCIe M.2 SSD

我去年买了第一台，它的表现还不错。我已经有第二天了，表现却差很多。

为了消除所有测试变量，我使用相同的活动闪存驱动器（Pop！_OS）启动了两个系统，然后运行Minetest。旧系统每秒60帧，而新系统只有20帧。据我所知，BIOS设置是相同的。

是什么导致图形性能上的差异？

更新-我已经从dmidecode添加了信息

从旧系统（去年购买）中：

Handle 0x0000, DMI type 0, 24 bytes
BIOS Information
    Vendor: Intel Corp.
    Version: BNKBL357.86A.0057.2017.1122.1550
    Release Date: 11/22/2017
    Address: 0xF0000
    Runtime Size: 64 kB
    ROM Size: 8192 kB
    Characteristics:
        PCI is supported
        BIOS is upgradeable
        BIOS shadowing is allowed
        Boot from CD is supported
        Selectable boot is supported
        BIOS ROM is socketed
        EDD is supported
        5.25"/1.2 MB floppy services are supported (int 13h)
        3.5"/720 kB floppy services are supported (int 13h)
        3.5"/2.88 MB floppy services are supported (int 13h)
        Print screen service is supported (int 5h)
        Serial services are supported (int 14h)
        Printer services are supported (int 17h)
        ACPI is supported
        USB legacy is supported
        BIOS boot specification is supported
        Targeted content distribution is supported
        UEFI is supported
    BIOS Revision: 5.6
    Firmware Revision: 8.12

Handle 0x0002, DMI type 2, 15 bytes
Base Board Information
    Manufacturer: Intel Corporation
    Product Name: NUC7i3BNB
    Version: J22859-308
    Serial Number: GEBN730007PT
    Asset Tag:                                  
    Features:
        Board is a hosting board
        Board is replaceable
    Location In Chassis: Default string
    Chassis Handle: 0x0003
    Type: Motherboard
    Contained Object Handles: 0

在新系统中：

Handle 0x0000, DMI type 0, 24 bytes
BIOS Information
    Vendor: Intel Corp.
    Version: BNKBL357.86A.0057.2017.1122.1550
    Release Date: 11/22/2017
    Address: 0xF0000
    Runtime Size: 64 kB
    ROM Size: 8192 kB
    Characteristics:
        PCI is supported
        BIOS is upgradeable
        BIOS shadowing is allowed
        Boot from CD is supported
        Selectable boot is supported
        BIOS ROM is socketed
        EDD is supported
        5.25"/1.2 MB floppy services are supported (int 13h)
        3.5"/720 kB floppy services are supported (int 13h)
        3.5"/2.88 MB floppy services are supported (int 13h)
        Print screen service is supported (int 5h)
        Serial services are supported (int 14h)
        Printer services are supported (int 17h)
        ACPI is supported
        USB legacy is supported
        BIOS boot specification is supported
        Targeted content distribution is supported
        UEFI is supported
    BIOS Revision: 5.6
    Firmware Revision: 8.12

Handle 0x0002, DMI type 2, 15 bytes
Base Board Information
    Manufacturer: Intel Corporation
    Product Name: NUC7i3BNB
    Version: J22859-312
    Serial Number: GEBN809003J5
    Asset Tag:                                  
    Features:
        Board is a hosting board
        Board is replaceable
    Location In Chassis: Default string
    Chassis Handle: 0x0003
    Type: Motherboard
    Contained Object Handles: 0

更新2

我运行了一个简单的ram速度测试，该测试位于https://www.pcsuggest.com/benchmarking-linux-systems-with-simple-command-line-tools/

剧本：

mkdir ramtest
sudo mount tmpfs -t tmpfs ramtest/
cd ramtest
dd if=/dev/zero of=data_tmp bs=1M count=512
dd if=data_tmp of=/dev/null bs=1M count=512
cd ..
sudo umount ramtest

在旧系统上的结果：

512+0 records in
512+0 records out
536870912 bytes (537 MB, 512 MiB) copied, 0.225257 s, 2.4 GB/s
512+0 records in
512+0 records out
536870912 bytes (537 MB, 512 MiB) copied, 0.0939961 s, 5.7 GB/s

新系统上的结果：

512+0 records in
512+0 records out
536870912 bytes (537 MB, 512 MiB) copied, 1.28991 s, 416 MB/s
512+0 records in
512+0 records out
536870912 bytes (537 MB, 512 MiB) copied, 0.602888 s, 890 MB/s