SSD Is Slow? – Find The Right Way To Fix It [Full Guide]

There are several reasons for why the performance of a solid state drive (SSD) would degrade, and as a result, it becomes slow. In some cases it can even become slower than a healthy traditional hard disk drive (HDD).

Here in this article I’ll address the most common reasons for the declination in the speed and performance of the SSD and present the solution for every case respectively.

Issue #1: Slow Boot-UP Speed

Possible Reasons:

1- Onboard VGA Is Enabled

It has been reported by some SSD users who suffered from long boot time delay that once they disable the Onboard VGA feature their problem was resolved. The system went from 1:15-1:30 boot time to 15 seconds!

To disable it, go to the “Advanced BIOS Features” section in your motherboard BIOS settings, and you should have something similar to this screen:

Just disable it and you will be fine.

2- Boot Devices Configuration Is Not Set Properly

You must ensure that the first boot drive is your SSD and not HDD. This will save many seconds booting up in some system as has been reported.

3- A defective Hardware Is Connected During Boot Time

Try to disconnect some of your hardware devices (sound card, VGA card, DVD-ROM, any USB device, etc) one after another until you verify they are not the reason for this slow down in boot time.

Also, some devices cannot be recognized by the operating system without installing their driver manually, and keeping them connected in this situation will compel the operating system to keep searching in its cache for a relevant driver which will consume time before the boot-up process is fulfilled.

4- BIOS Driver Needs Update

Your computer’s BIOS (Basic Input/Output System) is the first software your PC loads. It sets the stage for your operating system, so to speak, by finding all your PC’s various hardware components and letting the operating system know it can use them.

As with any software, your computer or motherboard manufacturer periodically updates the BIOS to fix bugs, add compatibility with new devices, improve caching functions, and make several other hardware tweaks that can speed up your boot time and fix annoying issues. These updates are available at the manufacturer’s site.

Issue #2: Slow Performance

Possible Reasons:

1- Using The Wrong SATA Port/Controller

Many motherboards come with two different SATA controllers, some are SATA 3Gbps and some are SATA 6Gbps. Just ensure you use the latter for connecting your SSD, that’s if your SSD supports SATA 3.x revision (aka SATA III).

Moreover, motherboards built on Intel chipset come with Intel SATA controller and sometimes with another controller such as Marvell or LAMD. Be sure to use Intel controller to connect your SSD as most of the low-speed issues occur due to using non-Intel controller on a motherboard built on Intel chipset.

How to find out the Intel SATA controller?

Well, usually SATA ports on Intel controller are numbered as can be seen in the image below:

The SATA3_M1_M2 ports does NOT belong to Intel controller.

Or just go to your motherboard manual and find out.

If your SSD is already connected to Intel SATA port, then make sure it is the first port. There’s been some anecdotal evidence that the 1st SATA port on a motherboard gives slightly better performance.

If this does not work, try the other non-Intel controller, perhaps it works.

If your motherboard uses a Marvell 9128 controller for the 6Gb/s ports, then try to update the controller driver. It helps in some cases.

2- An Issue With SATA Cable

Ensure using SATA 6Gbps (aka SATA III) cable if both of your motherboard and SSD support it. Also verify the SATA cable is not defective and it is well hooked up to the SATA port.

3- AHCI Mode Is Disabled

AHCI Mode plays a significant role in maintaining the high performance of solid state drive. When disabled the user may encounter crashes in some software or blue screen of death.

Just enter your BIOS settings and find the “OnChip SATA Type” feature and set it to AHCI. (Read more about this issue HERE)

4- The Firmware Driver Is Out Of Date

Usually when a bug is discovered in the functionality of SSD, the SSD manufacturer later releases a firmware update driver that comes with fixes to these bugs

5- TRIM Command Doesn’t Exist Or Disabled

TRIM command is crucial to maintain the performance of solid state drive. Make sure your SSD supports TRIM and it is enabled in your system. [Windows 7]: To do that go to command prompt and run it as administrator. Type:

fsutil behavior query DisableDeleteNotify

If it gives you ZERO as a result, you are fine, TRIM is already enabled. Otherwise if the result is ONE, you need to enable it. To do that just run command prompts as administrator, and type:

fsutil behavior set DisableDeleteNotify 0

If you use Windows XP which does not support TRIM, some SSD manufacturers (such as Intel that recommends using Acronis AlignTool – Intel® SSD Edition) provide an additional software utility to overcome the degradation caused by this situation.

6- Your SSD Needs Optimization

After a period of time using solid state drive, especially after installing many applications, it’s recommended to use the “Optimize SSD” feature that’s included in the SSD software package.

As for me I am using Intel solid state drive, and its toolbox has this feature and works very well:

If your SSD software package does not have this feature, you will need then a third party software utility to do the job. Try “Raxco PerfectDisk” or “Paragon Diskeeper 12”.

7- Your SSD Is Almost Full

This is one of the major reasons for the slowness of SSD. According to the SSD experts you need to maintain at least 15% of the drive capacity as free space (Corsair recommends 20%). Doing that will influence a remarkable increase in performance.

8- Power Plan In Windows 7/8 Is Set To Balanced

When you chose the Balanced Power Plan your SSD will not receive the full power it needs to run at its peak level of performance. This is usually not a big issue and changing it to HIGH Power will only increase the performance a little, unless there is another hardware that consumes lots of power, then it is strongly recommended to go for High Power Plan.

9- The Operating System Was Installed On A Pre-Used Drive

This mistake is barely adverted to by SSD users. When you intend to change your operating system or re-install it, or have bought a pre-used SSD, never ever think of using format command on the SSD drive using Windows Vista (or later versions of Windows)’s Installation CD, because it will write zeros everywhere on your SSD (source: which will harm your SSD and decrease its performance. Rather you need first and foremost to secure erase it then install your new operating system. (Read point #11).

10- Small Capacity RAM

Small capacity RAM memory is vulnerable to run out of space, and hence the overall system speed will extremely slow down, and as a result the SSD performance will diminish. Moreover having more RAM capacity will maintain the peak performance level of the SSD as was address in this article.

After all it is always better to have 3 to 4 GB RAM capacity in any modern computer. Less than that is not recommended.

11- Time For Secure Erase

After an excessive usage of the solid state drive it must slow down no matter what precautions you take. That’s why whenever your SSD becomes slow and you verify that you do not have any of the preceding issues, then it is the time to secure erase it to recover the lost performance.

If you do not have a “secure erase” feature in your SSD software package, you need a third-party software such as Parted Magic. Its free and works great.

Be sure to backup your data before starting this operation.

Nothing Works?

If this article has not helped you resolve your slowness issue with your SSD, this magical statement must surely help you: GET RID OF THIS DAMN SSD AND BUY A NEW ONE.