In order to test the NVME drive we used the following configuration:

• CPU: AMD Ryzen 9 7950X
• Case: be quiet! Dark Base Pro 901
• Case fans: 2x140 be quiet! Silent Wings 4 PWM
• CPU Cooler: Noctua NH-U12A Chromax.Black + 2x120mm Stock Noctua fans
• Motherboard: Asus ProArt X670E-CREATOR WIFI
• Memory: 2x16GB AddLink Spider X5 DDR5-6000MHz (EXPO Profile)
• PSU: be quiet! Dark Pro 13 1300Watt
• Main Storage: Samsung 980Pro 1TB
• VGA: MSI GeForce RTX 4090 SUPRIM X 24G
• Operating system: Windows 11 x64 + latest motherboard/AMD chipset drivers installed (DirectStorage enabled drive)

Since our motherboard supports TWO Gen5 drives, we installed at the closest to the CPU NVME slot the Crucial T705 2TB NVME SSD White, at the second PCIe Gen5 slot, another Crucial T705 2TB NVME SSD (barebone) as well. Note that at least with the Asus ProArt X670E-Creator motherboard, big VGA cards, like the MSI 4090 are exactly above the passive heatsink, so you won't be able to use aftermarket heatsinks at both Gen5 slots.

Without any airflow, the Crucial T705 NVME SSD will reach up to 80 Celsius with constant read/write operations. If you apply, even a small airflow, you should expect to see much lower temperatures, around 55 Celsius and 47 Celsius idle. So if you want to use PCIe Gen5 NVME SSD, you should look for air-cooled NVME SSD coolers and not the passive motherboard heatsink.

Thermal throttle with only the passive heatsink, performance should be double!

Starting our tests, we used many different CrystalDiskMark software versions to get how the drive would perform.

The latest CrystalDiskMark 8.0.5 promises up to 14.3GB/sec reading and 12.6GB/sec writing performance with sequential files.

In the latest ATTO Disk Benchmark 4.01.0f1 version, we got very high results, up to 13.40GB/sec reading and 11.89GB/sec writing performance.

At the I/O Meter test, the Crucial T705 NVME White SSD didn't show great performance with only (?) 42.904.156 points, where Samsung 990 Pro can reach easily 150.000 points.

Passing to the writing performance, the T705 is a solid performer, provided that you have a very fast (PCIe Gen5) NVME SSD drive. For our tests, we used as the source a Crucial T705 and copied the same files to the Crucial T705 using the Fast Copy software. The reported writing speed was around 12.483GB/sec.

Passing to the 200GB file, the reported writing speed was somewhat slower, probably due to the thermal throttle of the "source" T705 NVME, since it shares a passive heatsink with other NVMEs and even applying air cooling wasn't enough. Motherboard manufacturers should give more free space for air-cooled NVMEs, at least with Gen5 drives.

The source T705 drive did reached 81 Celsius and therefor reduced its performance during this test.

More tests are available with the TxBENCH v0.96, which shows that the Crucial T705 White NVME SSD can reach 13GB/sec reading and 12.38GB/sec writing speeds.

Lastly, the AS SSD Benchmark does give a higher overall score with 14.168 points.