SSD
官方标速
-
Samsung 990 PRO SSD 1T - 安装 macOS
- PCIe 4.0 x4
- 7450读,6900写
- 1400K IOPS Read, 1550K IOPS Write
-
WD SN850 1TB (m.2 slot 1) - 安装 macOS
- PCIe 4.0
- 读7000,写5300
- 1000K IOPS Read, 720K IOPS Write
-
WD SN770 2T
- PCIe 4.0
- 读5150,写4850
- 800/740K IOPS
-
Samsung 970 EVO PLUS 1T (m.2 slot 2) - 安装 Windows 10 Pro
- PCIe 3.0
- 读3500,写3300
- 600K IOPS Read, 550K IOPS Write
-
海康威视 C2000 Pro 2T
- PCIe 3.0
- 读 3400,写3100
- 420/420K IOPS
Benchmark
macOS下测试
结论
- macOS系统盘,装在主板的m.2 slot1上
- 接1路 m.2转接卡的SSD少快于通过接4路 m.2转接卡
- 第二槽主板 m.2槽(连接芯片组)与接1路 m.2转接卡的SSD速度几乎没有区别
Test 1
- 970 EVO PLUS 卡槽1
- WD SN850 卡槽2
Blackmagic disk speed
- max Read 5300
- max Write 2950
Test 2
- WD SN850 卡槽1
- 970 EVO PLUS 卡槽2
Blackmagic disk speed
- max Read 5760
- max Write 5180
Test 3
- Samsung 990 PRO 1T
Blackmagic disk speed
- max Read 6100
- max Write 5800
Test 4
SN 770 2T 第二槽 PCIe,通过接4路 m.2 转接卡
- Max Read 4100
- Max Write 4100
SN 770 2T 第二槽 PCIe,通过接1路 m.2转接卡
- Max Read 4100
- Max Write 4300
SN 770 2T 第二槽主板 m.2槽(连接芯片组)
- Max Read 4100
- Max Write 4300
Test 5
海康威视 C2000pro 2T 第二槽主板 m.2槽(连接芯片组)
- Max Read 2600
- Max Write 3100
海康威视 C2000pro 2T,通过接1路 m.2转接卡
- Max Read 2950
- Max Write 3100
Windows下测试
Test 3
- 970 EVO PLUS 卡槽1
- WD SN850 卡槽2
Test 4
- WD SN850 卡槽1
- 970 EVO PLUS 卡槽2
Conclusion
- 主系统应该装在 PCIE4 SSD 中
- PCIE4 SSD 应该插在卡槽1(走直连 CPU 通道的那个)
- macOS 装在 PCIE 4 M2 SSD 能提高性能(相较于PCIE 3 M2 SSD 而言,e..g, 970 EVO PLUS)
- macOS 下,使用 PCIE 4 M2 SSD会跑在 PCIE 下(PCIE3 x4 max throughput 为 3.938GB/s)
Reference
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