For questions concerning computer, or computer-related, performance. Please include metrics in your questions.

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2answers
23 views

Any realistic advantage of 802.11ac over 802.11n for a regular home connection?

I am using a 802.11ac Asus - 802.11ac Dual-Band Gigabit Wireless router. Don't have any complains yet but does it really matter to go from a $90 802.11n router to $200 802.11ac router? In theory, max ...
0
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0answers
30 views

Why does my PC slow down to a crawl when VMware and ntoskrnl.exe is writing to a data drive?

My PC becomes almost unusable when writing to my data drive. The main suspect which exhibits this issue is VMware Player. The problem does not happen when I myself move files in Windows Explorer or do ...
-1
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0answers
15 views

Linux healthy number of major page faults

I have a Solr process which has mapped 100 GB into virtual memory. When I run a load test on the query side, I read from /proc/<pid>/stat that the process has between 200 and 500 page faults per ...
1
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3answers
70 views

Available physical memory, XP

I installed a Windows XP x86 on my PC. But when I open the system information window in the System Summary tab, in the right-hand pane and at bottom the following are written: Total Physical memory ...
-1
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1answer
24 views

Investigating linux server slow down

We have a code build server, fedora 13, which was working at medium speed for 4 users. Speed means building a code branch took 1.5 hrs max duration. It was having one quad core, 8gb ram, 200gb hdd. ...
1
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1answer
26 views

Why does recording a game with Fraps decrease performance?

I've run into some performance problems whilst recording some gameplay videos for Youtube. As I understand, Fraps saves the current frame pixel for pixel in a video file (in a way similar to a RAW ...
-1
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1answer
24 views

Will overclocking my chipset increase the performance of integrated graphics?

My AMD Radeon HD 5830 recently broke (overheated because the fan stopped working), and I am currently attempting to run games on integrated graphics, on my chipset. Many games are responding slowly, ...
2
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0answers
29 views

Writing to subfolder is faster than writing to its parent

I use dd to measure write perfomance and observed something strange: writing to /data/emzed2 is faster than writing to /data. This is the way I measured the performance: $ dd if=/dev/zero ...
0
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2answers
51 views

CPU usage 99% constantly

My computer is running windows 8, and suddenly started running slowly. When I open the task manager, it tells me that the CPU is using 99% - sometimes the disk usages jumps up as well. The strange ...
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0answers
22 views

Slow Harddrive is Dragging the System

I have an HP Pro 3000 SFF running Window 8.1 Update 1 & Ubuntu 14.04 LTS. It uses an Intel G45s Chipset, a Hitachi HDS721050CLA362 500 GB harddrive, an Intel Core 2 Duo E8400 processor, and has 4 ...
1
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1answer
57 views

Why does my cursor speed slow down when my system is under intense network usage?

On some occasions of computer usage, my mouse acts very strangely. Whenever my computer is under intense network usage (i.e. watching an online video, downloading an application, patching a video ...
0
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1answer
22 views

Iperf network benchmark measures under-utilized?

I am working on two embeddded high performance network routers and I have connected them point-to-point via a 10Gbit optical fibre cable. I ran iperf benchmarks on them and when I connect through an ...
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0answers
31 views

RAM being used…, by what? Who is eating my RAM? [duplicate]

since some days ago, my computer starts as normal but, as the time goes by, the RAM usage keeps adding up, until it reaches 75% of my RAM (+-9 GB, out of 12 GB). And what's interesting is this: ...
2
votes
0answers
14 views

Why do I get better performance on VMWare when I enable all cpus along with adding cpulimit?

I'm curious but at the same time also would like to share my findings of the increased gaming performance in VMWare by enabling all virtual cpus and limiting the VMWare process with cpulimit ...
0
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0answers
22 views

Windows will not open processes

I recently I come upon an unexplainable issue concerning my Windows 7 partition. When I woke up Thursday morning and logged into Windows, I discovered that it was acting really slow. It didn't take ...
3
votes
1answer
47 views

Is there a way to identify the busy (CPU-consuming) tab in Firefox?

Sometimes there's a nasty, guilty, CPU-hogging tab in Firefox that's maxing one of my CPU cores and making the whole browser sluggish. I'd like to find it and close it. Sometimes I get lucky, but ...
0
votes
1answer
40 views

Why does wmic tells my memory speed is 1333MHz, but Speccy says 665MHz?

I've checked my computer specs, and I saw I had memory in 1333MHz speed. I've checked it in wmic (see pic) and it's true. B ut i've checked it in Speccy (see pic) and it shows 665MHz. I've checked ...
-1
votes
0answers
49 views

Troubleshoot System Performance Problems

I am running Windows 8.1 PRO N on my Samsung Chronos Series 7 laptop http://www.samsung.com/us/computer/pcs/NP780Z5E-S01UB-specs It is a development machine, it has Visuals Studio 2013, SQL Server ...
1
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2answers
53 views

Does Windows still copy each file directly to disk, unlike Unix?

Unix was originally designed to perform file system operations in memory, and to update the disk blocks only every 30 seconds during sync. This resulted in a much faster user experience than MSDOS ...
-1
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2answers
25 views

Is software like tune up utilities essential?

Is software like tune up utilities necessary? Can't we perform the tasks using some other free ware tools and built in windows tools?
0
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1answer
27 views

i7 (first-gen) running memory on 1066Mhz vs 1600Mhz - any performance loss?

I tried to read about this, like what is the actual difference, but I could not find any benchmarks or helpful posts. Most of them are simple placebo effects, like "oh my god the 1600mhz module made ...
0
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0answers
33 views

Slow File Transfer over Gigabit Network

There are a few computers connected to a computer (Windows 7 x64) via a Gigbait network in order to transfer file, however lately the transfer of files has been really slow (11Mb/s) I have already ...
0
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0answers
19 views

Strange SSD Response Time Spike

I have a Samsung 840 EVO 1 TB SSD disk. I am streaming data to this sequentially at a rate of 60 MB/s to four different files (15MB/s each) with the size 168GB (preallocated) each in a circular ...
0
votes
1answer
27 views

Recommended RAID5 stripe size?

I have a RAID5 array built from 4 1TB drives. I initially set the stripe size to 1M since I will be storing large files (much larger than 1MB). The NTFS cluster size is 64KB (largest possible). ...
0
votes
1answer
21 views

How can internet speed test applet not just show slow speed, but hang?

I have one internet connection, which works bad. It should be 80/20, but works much slower. Also, when measuring it's speed, speed test applet not just show slow speed, but HANG. How can it be ...
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votes
1answer
107 views

Google Chrome working incredibly slow

So recently I have received a new laptop for work. It's pretty decent, i5 with 4GB of ram and hybrid SSD hard drive. Google Chrome was always my default browser and it works painfully slow here, I ...
0
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0answers
33 views

Toshiba Satellite P850 - Freezing and Stuttering

I've about exhausted all my known options at this point. I own a Toshiba Satellite p850 which was new in 2012. The laptop frequently (several times per minutes) locks up or stutters the entire system. ...
0
votes
1answer
67 views

Computer runs slow in the startup screen and booting of windows, programs fade in and fade out slowly

I think I have the exact same problem that is described here: PC running slow like molasses from BIOS to OS. Everything was working fine, and then suddenly, out of nowhere it took forever to boot my ...
0
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1answer
57 views

Memory Runs at Flex Memory Mode

I had 4 GB RAM installed, running in dual channel mode. RAM: Corsair TWIN2X4096-6400C5DHX (CM2X2048-6400C5DHX) Motherboard: Gigabyte GA-EP45-UD3R Channel 0: DIMM1, DIMM2 Channel 1: DIMM3, DIMM4 ...
0
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0answers
31 views

Hardware concerns for optimal ruby on rails development on ubuntu machine

I've been developing dynamic web sites using ruby on rails on a 5 year old mac mini which has been great except that it takes too much time -- 15 minutes or so -- to run my simple test suites. I ...
-1
votes
0answers
36 views

Graphic card performance

My graphic card runs fast and then slows down, and this is happening again and again. I can hear the sound of the fan running fast when it happens, less loudly when slowed down. The sound is like a ...
0
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2answers
52 views

Processor upgrade on a laptop vs. Ram upgrade. Also does ram always matter? [duplicate]

I have a Dell Inspiron 14r (N4110) with an Intel Core i3 and 4gb of ram. It runs very smoothly, however gaming on this laptop is very limited. This is mostly because of integrated graphics but i have ...
0
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0answers
43 views

Why might one hard disk perform slower than another?

I have just bought two WD 3TB Reds (WD30EFRX) for a FreeNAS box and whilst doing burn-in testing it seems like one is consistently taking about 10% longer than the other. So far I've done: a dd read ...
0
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0answers
32 views

Windows 8 slow after refreshing and rebooting

First, I apologize if this is in the wrong place. I use S/O a lot but not the other sites much. I have an HP Split X2 that has been very choppy as of late (takes several seconds to respond to any ...
0
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0answers
12 views

Page cache flushing behavior under heavy append load

I'm trying to understand the behavior of the Linux pdflush daemon when: The page cache is initially pretty much empty There is a large amount of free memory The system starts undergoing heavy write ...
0
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1answer
14 views

Speed issues when encrypting large file with mcrypt or alternatives

I want to encrypt a 100 GB file on my up to date iMac. It is hard to find out where the temp file is, so I can't find out the progress, but the encryption is already taking a full day. Is this normal? ...
0
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0answers
37 views

Copying between a remote share on Win2008R2 and Windows 7 is unbearably SLOW

I manage servers in 3 remote locations. Copying files from my workstation (Windows 7) and the remote servers (Windows 2008R2) is painfully slow. Yes my network card drivers are up to date, yes I can ...
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votes
3answers
76 views

14gb ram installed, only 6gb detected [duplicate]

I've checked each stick individually in the computer, by itself, to verify that the RAM was all in working condition. I have 2 sticks of 4gb RAM and 2 sticks of 3gb RAM. I'm not sure which are being ...
0
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0answers
66 views

Windows 7: Slow as can be - Low Resource usage

My main PC is a Dell from 2009 with Win7 SP1 that was originally a Vista machine. I installed a second HDD with Win7 on it and set Vista as the second drive. Its running with an Intel Core Q6600 ...
0
votes
1answer
39 views

How to tell, before buying, if a given graphics card will play Full HD video?

I am looking for the cheapest video card that would be capable of smooth playback of Full HD (1080p) video on a Full HD screen. An answer by @Mikhail on a related question briefly mentioned that: ...
0
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0answers
26 views

Network speed significantly reduced on Win Server 2008 DC

I started building a little server at home on a Gigabit network. I am running Windows Server 2008 32bits SP2. Before making the server a Domain Controller, I was able to get file transfers at an ...
0
votes
2answers
61 views

Upgrading MacBookPro

I'm using a Late 2011 13" MacBook Pro with an Intel i5 @ 2.4 GHz and 4 GB 1333 MHz ram. The computer has started to get older. I was going to upgrade the ram but since Mavericks come out, the ram ...
0
votes
1answer
34 views

Is copy speed depends on or vary with file-types?

I want to know is file-copy speed is depends-on / vary-with file-types? For same size file but difference in type of file (Ex: exe, dll, zip, ppt etc.). If It is depends then Why/How?
0
votes
1answer
26 views

One network, two macbooks, one is fast and the other is slow

I really need help for my friend. I know next to nothing about computers. My roommate and I both have macbook pros from the same year running OS X, are both connecting wirelessly to the same xfinity ...
1
vote
1answer
39 views

Software to do specific CPU load test [closed]

For the purpose of testing my own script that reports CPU usage I'm looking for a program to put CPU under a certain workload, for instance: 10%, 20%, etc. up to 100%. Is there a program that can do ...
1
vote
1answer
63 views

Why does Windows' performance degrade over time even when it isn't used? [duplicate]

I know that similar questions have been asked before (like this and this), but none of them answer my question. My problem is, as stated in the title, that when Windows isn't in use (some months) its ...
0
votes
1answer
54 views

Spiking Disk Usage

So recently my HP Envy 15 was sent away to get serviced as the BIOS corrupted after an automatic BIOS update. To fix this, they replaced the motherboard and that is all the supposed changes that they ...
0
votes
1answer
34 views

Chipset GPU causes a massive slowdown

My AMD Radeon HD 7700 recently broke (fan stopped working and GPU overheated), and now I'm running on internal chipset graphics, and it causes a massive slowdown of the whole PC. I've changed the ...
2
votes
2answers
181 views

Windows 7 / SMB2 slow network copy performance

Troubleshooting a tricky performance problem and wondering if this behavior is normal/expected. This seems to be related to SMB2, as switching to SMB1 resolves things. The question is whether this is ...
0
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0answers
58 views

Delphi XE2 runs very slow in VirtualBox with Windows 8.1 installed

While the whole guest Windows runs normal, Delphi XE2 is really slow, especially with code completion. And CPU utilization is near 50% though the Delphi itself does not get more than 10% during ...