我有两个英特尔 NUC 系统：
2.4 GHz i3-7100U（2.40 GHz - 3MB 缓存 - 2 核 - 4 线程）
4 GB DDR4，2133 MHz（1×4 GB）
250 GB NVMe PCIe M.2 SSD
我去年买了第一个，现在性能还不错。我用了第二个几天了，性能差了很多。
为了消除测试中的所有变量，我使用同一个实时闪存驱动器 (Pop!_OS) 启动了两个系统，并运行了 Minetest。旧系统获得 60 fps，而新系统仅获得 20。据我所知，BIOS 设置是相同的。
什么原因造成图形性能的如此差异？
更新 - 我添加了来自 dmidecode 的信息
从旧系统（去年购买）：
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
从新系统来看：
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
我进行了一个简单的内存速度测试，结果发现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
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