HDD speeds significantly different - drives are same specs

[unolker]

Hi... First post, recent follower after 1st build. Searched for similar thread / answer w/o luck.

I just installed a second HDD today and ran crystal disk mark to check the speeds.

I was surprised to see that the Read / Write speeds were almost twice as fast as the same exact drive I installed when i built the PC last week. 220mb/s vs 140 mb/s.

Both Drives are a Toshiba x300, formatted to NTFS.

I have the Asus z370 e MOBO. My 970 evo is in the second m.2 slot, so sata 5&6 are disabled.

I have the 2 toshiba HDD and one sandisk SSD in sata slots 1-3 (honestly not sure in which one, but it shouldnt matter since I dont have the other m.2 slot being used, based on my prior extensive research).

Assuming im missing something in the BIOS, but I cant find it. Not sure what else would be causing the discrepancy in speeds.

I added a screen shot of each drive. Let me know what y'all think. Thanks in advance.

https://ibb.co/nnDnzd
https://ibb.co/dGdLKd
https://ibb.co/jQEGsy
https://ibb.co/eAQNXy

-----
Intel - Core i7-8700K 3.7GHz 6-Core Processor
Asus - ROG STRIX Z370-E GAMING ATX LGA1151 Motherboard
Asus - GeForce GTX 1060 3GB 3GB Dual Video Card
Corsair - Vengeance RGB 16GB (2 x 8GB) DDR4-3000 Memory
-
Samsung - 970 Evo 500GB M.2-2280 Solid State Drive
SanDisk - Ultra 3D 500GB 2.5" Solid State Drive
Toshiba - X300 4TB 3.5" 7200RPM Internal Hard Drive
Toshiba - X300 6TB 3.5" 7200RPM Internal Hard Drive
-

 

[srdowns]

The Toshiba X300 6TB drive benchmarks a bit faster than the Toshiba X300 4Tb drive.
See here:
http://hdd.userbenchmark.com/Compare/Toshiba-X300-4TB-vs-Toshiba-X300-6TB/3592vs3594

 

[ElectrO_90]

Also, your slower drive could be partially "in use" and it is 50% full. This could mean that the heads had to move while doing the test. Which would slow the overall down.
The virus checker could be checking files, it could be a whole host of reasons.

 

[unolker]

Also, your slower drive could be partially "in use" and it is 50% full. This could mean that the heads had to move while doing the test. Which would slow the overall down.
The virus checker could be checking files, it could be a whole host of reasons.

I thought of that. The crystal mark test had the same results when it was new / empty and I had no applications installed... which is why i thought the difference was interesting. I ran the test a few times, always same results. I guess if its normal.. it is what it is. Just figured i had something set up wrong.

Thanks for the reply

 

[unolker]

The Toshiba X300 6TB drive benchmarks a bit faster than the Toshiba X300 4Tb drive.
See here:
http://hdd.userbenchmark.com/Compare/Toshiba-X300-4TB-vs-Toshiba-X300-6TB/3592vs3594

Interesting. definitely a little better on the benchmark, but not as significant as what im seeing. I guess based on this and other response I shouldnt be worried. Just seemed odd as I ran these tests multiple times, in multiple stages of the build, and I would expect both drives to preform about the same.

In contrast, I had my 970evo set to x4 instead of x16 in the bios at first, which capped the speeds significantly.

Thanks for the reply.

 

[ElectrO_90]

Have a look at this
4tb http://hdd.userbenchmark.com/Toshiba-X300-4TB/Rating/3592
6tb http://hdd.userbenchmark.com/Toshiba-X300-6TB/Rating/3594

They seem almost identical and your one is a lot faster for some reason, firmware?