[SOLVED] why my nvme ssd's iops too low

[seruhan]

i decided to upgrade my old pc with nvme ssd. i cheked my motherboard's manual after i learn if i buy nvme ssd, i only use it with pcie 2.0 x4. so i buy adapter and ssd. after all this i cant boot my pc from nvme ssd then i moded my bios.
https://www.amazon.com.tr/gp/product/B087FPVKPL/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
https://www.amazon.com.tr/gp/product/B07VYG5HQD/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
Bios mod page: https://www.lanis.nl/do/view/Main/M5A97R20NVMEBIOS

So there is my question: why my ssd's iops too low and why is there a discrepancy between these benchmark programs?

SSD: 250GB A2000 PCIe NVMe SA2000M8/250G SSD
GPU: Sapphire AMD HD 7850 1GB
Ram: 1600mhz Gskill DDR3 CL9
Motherboard: Asus M5A97 R2.0
CPU: AMD FX-6200
Psu: Thermaltake Litepower 700W
My ssd specification: 2000mb/s read - 1100 mb/s write / 4k random iops read:150k - write:180k on the paper.

Userbenchmark results:https://www.userbenchmark.com/UserRun/39201389
other benchmark results

 

[popatim]

because your drive is rated at about 2Gb/s at pcie3, you dropped it to pcie2 so it's speed is cut in half ~1GB/s

 

[USAFRet]

As above.
It is a mediocre NVMe drive, connected to a half speed port.

It is what it is.

 

[seruhan]

because your drive is rated at about 2Gb/s at pcie3, you dropped it to pcie2 so it's speed is cut in half ~1GB/s

As above.
It is a mediocre NVMe drive, connected to a half speed port.

It is what it is.

i understand the situation but i pick the ssd for pcie 2.0 x4. I cant understand too different benchmarks result from different apps.

 

[popatim]

The SSD is PCIE3x4 natively.

The benchmarks are different because they test in different ways. Some of testing is known, and others we have no idea what setting they are using to test . For example, what criteria is Samsung Magician using inn it's IOP measurements? 4k 8k , 128k? What's the queue depth. Samsung doesn't tell us so all we can do is guess.

 

[seruhan]

The SSD is PCIE3x4 natively.

The benchmarks are different because they test in different ways. Some of testing is known, and others we have no idea what setting they are using to test . For example, what criteria is Samsung Magician using inn it's IOP measurements? 4k 8k , 128k? What's the queue depth. Samsung doesn't tell us so all we can do is guess.

okey it fits now. i was thinking the i can give life kiss with nvme ssd on my old pc thanks for all helping me.

 

[popatim]

Awesome!