Samsung 840 Pro SSD speed isn't that good

So I got my ASUS N550JV and I installed a 256GB Samsung 840 Pro SSD in the ODD bay and left the 1 TB HDD in the standard HDD bay. I do think I notice a difference with the SSD (especially in terms of HDD activity versus the SSD), but the SSD isn't really performing like how I've seen it online.

I have Samsung RAPID enabled and I've 8 GB of RAM. Yet when I ran the Crystal Disk Benchmark I just got this:



Magician says that I'm only connected to a (not SATA 3 port) as it says there's a 6/gbs port available.

This is my first time dealing with an SSD and I'm really regretting not placing it in the main HDD cage like I intended to. Is SATA II really holding the SSD back and will I see a day-to-day performance increase with the SATA III port? I may have nearly stripped some of the torx screws since I had to use a really bad set of Torx screwdrivers (I don't have my regular kit) so I'm hesitant of taking it apart again.

I only have 70% of the drive formatted, the other 30% is unallocated.

Thanks!

 

anything 400+ MB/s is sata 3 speed, so you are not having a performance drop in accordance to crystal disk benchmark

sata 2 is 3Gbps which translate to 375MB/s (division by 8) notice going from bits(b) to Bytes(B), where 8 bits(b) = 1Byte(B) so your SSD is performing as it should

 

Wait so how did benchmarks with RAPID on the 840 EVO and PRO reach 1000+ MB/s?

Also I didn't notice any speed increases with the SSD when I first installed it until after I updated the BIOS. Now I get 6 seconds from cold boot.

Regardless of my (non-) issue, SSDs are insane.

Sent from my dlx using Tapatalk

 

try the test again without rapid and report back to see if seq read/write dropped below SATA3 speeds (only seq) the 512, 4k and 4kqd32 will definitely drop a bit with rapid disabled

if it performs like 30-40% shy of what the manufacturer claimed, something will be wrong here, to further check that the SSD is performing normally, compare it with these results:

Samsung 840 Pro Series 256GB SSD Review | Custom PC Review

if the speed with rapid disabled is comparable to the above nothing is wrong, then you can narrow the troubleshooting down to rapid causing the problem

P.S. just seen that you have placed the SSD in the ODD drive, i mean why would you do such thing knowing that the ODD drive is going to do something weird to the SSD, if you don't know you'd know it by now, please kindly open up your laptop and switch the drives over, it won't affect your OS installed in the SSD

 

If you're on a SATA II port + RAPID functionality enabled, don't expect 1000+MB/s

1000+ MB/s speeds are only achievable on your SATA III port with RAPID

SATA III is probably only provisioned to your laptop's hard drive bay that's true for a large number of laptops

If youre wanting better speeds swap your drivea around.

Sent from my GT-I8190 using Tapatalk

 

Both of you guys are right. I was lazy the first time and just hoped the ODD bay would provide the same performance and I was wrong. Here's a new benchmark with RAPID after switching the drives around:



The 4K writes varied but I'm not surprised based off what I've read.

 

There's only 1 SATA 3 6GB/s drive bay inside this model notebook.

The entire bottom panel can be taken off by removing the phillips screws holding it on.

Put the SSD in the internal bay where the original hard drive is and put the hard drive in the caddy.

The important numbers in the synthetic Crystal Disk Mark benchmark is the small file reads and writes that accounts for about 80% of daily disk access not the large sequential numbers that may account for only 1% of daily disk access.

Another thing to note is that you are benchmarking a C: boot drive in use with an OS and data installed which will result in lower scores than those in reviews that benchmark "empty drives" while the computer is in "Safe Mode".

IMO,the best synthetic benchmark is Anvil Storage Utilities.
http://www.ssdaddict.com/apps/AnvilBenchmark_V110_B337.zip

If you are using Windows 8.1 then you should run this command as Administrator to optimize Windows for the SSD

WinSAT diskformal

Then go into the Control Panel>Admin Tools>Optimize Drives and optimize the SSD

 

If I already selected my optimization profile with Samsung SSD Magician is there any need to do this? Will it reverse or affect the settings the app set in any way?

 

This optimization is for the Windows operating system.

Previous versions of Windows had the WEI(Windows Experience Index)SSD optimization but it's missing from Windows 8.1

After you run the WinSAT diskformal command as administrator Windows 8.1 will list your SSD as a Solid State Drive and schedule the optimization.

 

So this is to run the TRIM command? I thought the SSD automatically does this at the hardware level?