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Samsung 850 pro slow sequential and random reads

post #1 of 22
Thread Starter 
I bought a lenovo y50 laptop and switched the onboard hybrid drive with a 850 pro.
Specs: Intel i7 4710 HQ CPU @ 2.5 GHz,
8 GB RAM,
Nvidia GTX 860m GPU
Latest drivers and bios from lenovo website.
I did a fresh install of windows 8.1. and installed samsung magician, kaspersky, malwarebytes and ccleaner.
The drive is connected in SATA 3 (6Gb/s) and AHCI mode is on.
System optimisation is set to advanced and OP 20%
Performanc
e benchmark results in Sam magician : Sequential read - 166 MB/s Random read - 2251 IOPS
Sequential write - 530 MB/s Rndom write - 65875 IOPS
I'm wondering why the Read Speeds are so slow, especially the 4K-64 Thrd. I'm a novice with computers, so a little help would be great.smile.gif
Edited by mak61 - 1/8/15 at 10:32am
post #2 of 22
I notice your laptop come with 1 TB Hard Drive 8GB Nand. Did you replace this replace or used a secondary connector?
    
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post #3 of 22
Thread Starter 
I replaced the 1TB hard drive with the 850 pro. There is only 1 drive slot available on this machine.
post #4 of 22
Is this the consistent performance? Just curious to see if you get the same results now - just in case there happened to be a process running in the background (like an update or something)
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post #5 of 22
Thread Starter 
I'm afraid this performance is consistent. Ive checked with both the AS ssd benchmark and the samsung magician multiple times. The results are more or less the same. The worst performance has been the 4K-64Thrd.
post #6 of 22
It's because it's a laptop. Most of them do this in order to save power.
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post #7 of 22
Quote:
Originally Posted by ZealotKi11er View Post

It's because it's a laptop. Most of them do this in order to save power.

This sounds right.

OP try going into device manager and see if you can get a Power Management tab under SATA devices and if there is an option to switch to High Performance, or uncheck any power saving options.
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post #8 of 22
Thread Starter 
So does that mean everything is fine and the performance will increase if need be (say, playing a game). Is there something i can do to check this? Do i need any changes in power management of my laptop? I'm currently using 'Samsung High Performance' scheme.
post #9 of 22
Thread Starter 
I checked the SATA controller driver in device manager, and there are no power options available here. However, under the resources tab there is an option "use automatic settings". This is checked and greyed out with no means to change this setting.
post #10 of 22
Quote:
Originally Posted by mak61 View Post

I checked the SATA controller driver in device manager, and there are no power options available here. However, under the resources tab there is an option "use automatic settings". This is checked and greyed out with no means to change this setting.

Need to go into power options and check there........control panel/system and security/power options.




Edited by Axe7 - 1/8/15 at 1:28pm
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