Why is my new build PC so slow?

[Junnnn]

I just build a new PC, but the new PC doesn't run as fast as I expect. Can you help me to find out the problem? I try to reinstall ubuntu 14.04 for several times, but it doesn't seem to help too much. I also update the GPU driver from NVIDIA website. Below is my configuration.

CPU: i7 5820k
Mobo: MSI X99A Raider http://www.newegg.com/Product/Product.aspx?Item=N82E168...
RAM: 32GB (G.SKILL (4 x 8GB) 288-Pin SRAM DDR4 2400) http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Case: http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Hard disk: 1TB WD 7200RPM http://www.newegg.com/Product/Product.aspx?Item=N82E168...
CPU cooler: NH-D14
GPU: GTX 260 (the only old component)
Operating System: Ubuntu 14.04

 

[basroil]

You need much more data than just specs. What's slow? How slow is it?

 

[cdabc123]

well games will be slow because of a 260. and websites will never be instant because you still need to wait for the website to send the page back

 

[dudeman509]

No SSD? You should get a SSD with all that other good hardware...

 

[Junnnn]

I don't buy a SSD yet. When I build the PC, I just thought that new HDD may be fast enough and SSD may not be urgently needed. Does it matter a lot? But new PC should not be that slow. When I open several webpages and some programs at the same time, it becomes pretty slow. My macbook pro (2013 version) with less RAM and less powerful CPU runs even faster than it.

No SSD? You should get a SSD with all that other good hardware...

 

[Junnnn]

I don't play games. When I open too many webpages (>15 pages), it becomes quite slow. My network connection is fine, since I have no problem viewing webpages on my macbook.

well games will be slow because of a 260. and websites will never be instant because you still need to wait for the website to send the page back

 

[dudeman509]

Your MacBook Pro has a SSD.

Is there high disk activity when it acts slow?

 

[basroil]

I don't buy a SSD yet. When I build the PC, I just thought that new HDD may be fast enough and SSD may not be urgently needed. Does it matter a lot? But new PC should not be that slow. When I open several webpages and some programs at the same time, it becomes pretty slow. My macbook pro (2013 version) with less RAM and less powerful CPU runs even faster than it.

Again WHAT ARE YOUR "slow" CONDITIONS? Without knowing what programs are slow and the conditions leading to it you won't solve your problem here!

 

[Junnnn]

Sorry that I don't know which data is needed. I installed conky to see some data.
On idle state, my CPU runs on average 1.2-1.3 GHz with the temperature 34 degree. The RAM usage is around 5% (usually less than 10%). It takes up 85% of the hard disk space under the Root directory on Ubuntu.

It takes 7-9 seconds to open PyCharm, and 20-34 seconds to open Matlab. After I open several pages (>15) on Firefox, it takes about more than one second to open another page. When I open PyCharm and run more than 2 python programs, I have two experiences that the machine crashed.

I don't buy a SSD yet. When I build the PC, I just thought that new HDD may be fast enough and SSD may not be urgently needed. Does it matter a lot? But new PC should not be that slow. When I open several webpages and some programs at the same time, it becomes pretty slow. My macbook pro (2013 version) with less RAM and less powerful CPU runs even faster than it.

Again WHAT ARE YOUR "slow" CONDITIONS? Without knowing what programs are slow and the conditions leading to it you won't solve your problem here!

 

[basroil]

Sorry that I don't know which data is needed. I installed conky to see some data.
On idle state, my CPU runs on average 1.2-1.3 GHz with the temperature 34 degree. The RAM usage is around 5% (usually less than 10%). It takes up 85% of the hard disk space under the Root directory on Ubuntu.

It takes 7-9 seconds to open PyCharm, and 20-34 seconds to open Matlab. After I open several pages (>15) on Firefox, it takes about more than one second to open another page. When I open PyCharm and run more than 2 python programs, I have two experiences that the machine crashed.

I don't buy a SSD yet. When I build the PC, I just thought that new HDD may be fast enough and SSD may not be urgently needed. Does it matter a lot? But new PC should not be that slow. When I open several webpages and some programs at the same time, it becomes pretty slow. My macbook pro (2013 version) with less RAM and less powerful CPU runs even faster than it.

Again WHAT ARE YOUR "slow" CONDITIONS? Without knowing what programs are slow and the conditions leading to it you won't solve your problem here!

You shouldn't care about idle speed, we need peak speed

 

[Junnnn]

Below is the output. It seems to remove just three items.

~$ sudo apt-get -s remove compiz
[sudo] password for jjhu: 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages will be REMOVED:
  compiz ubuntu-desktop unity
0 upgraded, 0 newly installed, 3 to remove and 3 not upgraded.
Remv ubuntu-desktop [1.325]
Remv unity [7.2.6+14.04.20151021-0ubuntu1]
Remv compiz [1:0.9.11.3+14.04.20150313-0ubuntu1]

Here is what I find in my /etc/default/grub.
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

Open a terminal and type

sudo apt-get -s remove compiz

then type

sudo vi /etc/default/grub

change the line:

GRUB_CMDLINE_LINUX_DEFAULT=""

to

GRUB_CMDLINE_LINUX_DEFAULT="quiet"

run:

sudo update-grub2

PS your boot time to linux will be decreased also -10 secs

PS2 linux debian is more serius os if you like my oppinion.