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

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22 views

If the desktop under a certain user becomes slow, how to improve performance?

I am using Arch Linux, and the default username has become slow and unresponsive over time. I created a new user to see it was fast and as good as new. I don't want to delete the default user, as a ...
1
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2answers
106 views

hard drive - How type of I/O access influences access time?

I am trying to better understand how the type of I/O access influences the access time. Can a conventional HDD perform both random and sequential access ? If so why would you want to keep provisions ...
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0answers
15 views

How does collectl summarize its numbers?

I'm analyzing the processor usage of a system over the course of 24 hours. I have collectl set to record sysT and usrT every five seconds, but for some long-running processes this results in thousands ...
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1answer
33 views

Raid0 Test For Multiple Partitions On A Single Drive Gave Better Sequential Write Speeds That Expected

Obviously running raid0 on partitions of a single drive will result in a performance decrease; data has to be written/read multiple times to/from the same drive, and because of how it's spread the ...
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0answers
72 views

What is Prime95 benchmarking?

I've recently had to benchmark the CPU performance of a variety of operating systems on identical machines. I've been using the 'benchmark' functionality of Prime95 to obtain a consistent test. I've ...
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2answers
1k views

Why does unequal amounts of RAM in each slot decrease performance?

This page describes the RAM specifications for many of the MacBook laptops. In the section for my laptop (13" Pro Late 2011), it says: Additional Notes: For best performance, fill both memory ...
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2answers
64 views

How to prevent explorer.exe to get laggy when some network paths are not available?

I have set up some network path in Windows 8.1 which can only be accessed when I'm connected to a VPN. I don't want to re-map/add them every time when I connect to the VPN (I do this quite often). If ...
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2answers
267 views

Periodic FPS drops in games, regardless of graphis card

When I play recent 3D games (Battlefield 3 & 4, Tomb Raider, Saints Row 3 & 4, etc.) I experience periodic FPS drops, e.g. in Battlefield 3 from the average of around 70-80 fps to 20-30 fps; ...
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1answer
60 views

Experiencing lag during games despite meeting system requirements..help please

Here are my computer specs Mainboard: ASRock M3N78D CPU: AMD Phenom II X4 960T Video card: GTX 560 RAM: 4G Hard Disk: Samsung HD501LJ XCOM Enemy Within recommended requirements CPU: Core 2 Quad ...
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0answers
236 views

HP 15-r007tx running too slow

Just two days before I bought HP 15-r007tx notebook. It came with free DOS os. I installed windows 8.1 pro in it. From the first use after installing windows 8, it's running slow with very slow ...
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0answers
175 views

iTerm2 performance vs Terminal.app

I prefer iTerm2 for its features, but Terminal.app outperforms it in terms of responsiveness. I mostly notice this in Vim: iTerm gets choppy during scrolling and/or rapid cursor movement. Is there ...
0
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1answer
89 views

Harddisk standard differences

I've added a new hard-disk to my laptop today. Now i wanted to compare the information available over the harddisk. So installed a tool called 'CristalDiskInfo'. A property from the information called ...
0
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1answer
58 views

Understanding the differences between different Intel processors

I'm looking at buying a new laptop PC (my old one is failing). I noticed the latest CPU clock speeds are lower than my current one though the CPUs are newer. It used to be that a higher clock speed ...
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2answers
120 views

Windows 7 slower than death. Dell Inspiron 17 R 3521 [closed]

I have windows 7 on my Dell Inspiron 17R 3521 The laptop came with Windows 8 as the default software and naturally enough (my opinion) I hated it. So I installed windows 7 dual boot with ubuntu 14.04 ...
0
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1answer
111 views

Outlook synchronize feature extremely slow

My Outlook synchronization function takes a very long time (>5 minutes). This delays features to the point of rendering Outlook not useful: New mail not pulled from server Search functionality hangs ...
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0answers
93 views

MIcro SD card gets slower after partial fullfillment

I have a micro SD card from Kingston - 32GB class 10 When i'm writing on it using usb card reader or my phone, average write speed is about 6MB/s But after about 10GB of data written into it, ...
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2answers
274 views

When to use high performance plan and balanced power plan?

I have an SSD, a Samsung Evo 250 GB, and when I configured it with Samsung Magician, this one created a new power plan called Samsung high performance. Until now I've been using this power plan. Now ...
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0answers
61 views

Can anyone assist me in determining why my ssds are running so slowly please?

I have an MSI GT 680 Gaming laptop that I use for data analysis work. History: Originally I had a pair of 128GB Kingston Hyper X SSDs in the system in RAID 0. I put these in place (when I bought the ...
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0answers
25 views

Windows software raid0 giving bad performance

I have two Samsung SSD's in RAID0 mode. I measured their sequential read/write speeds first in RAID0 Hardware and they give around 1000 mbps but then I used two disks in RAID0 software from within ...
-7
votes
1answer
53 views

Does SSD have any effect on overclocking?

Hi i just had a query in my mind- Do i really need to add SSD to OC ...I mean does it make any difference on the perfomance of the processor ? I would like to overclock my i7 and i have already spend ...
0
votes
1answer
67 views

Extremely slow download speed but reletively good downstream

I am having severe internet issues with no particular cause (that I can find). My average download speed was around 8Mbps on ADSL2+ during peak hours (I live in Australia without NBN) and I was ...
2
votes
0answers
47 views

AMD Processor state failures

I have a HP Pavillion dv6-6123cl Entertainment PC with a locked bios. I use a program called K10Stat in order to get around this and overclock anyway. I have AMD A6-3400 APU with Radeon(tm) HD ...
0
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1answer
40 views

Will Diskpart Clean All reduce HDD lifespan?

I am planning to reinstall Windows on my PC and I just want everything to be as fresh and new like when it is first used. I thought about doing a Clean All on my hard disk, but I have one question: ...
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3answers
132 views

Slow Hard Drive

My WD Elements 1TB hard drive has suddenly became very slow, I cant copy from it or watch anything from it without it playing and pausing the whole time. It is not full there is still over 200gigs ...
0
votes
1answer
65 views

How can I find the amount of floating point operations for each Mhz for processor X?

I've decided to buy a certain processor (laptop Intel-Core-i7-4790K 4Ghz-4.4Ghz turbo), but it pains me that I can't tell how many GigaFLOPS(GFLOPS) the processor actually has. I also can't find how ...
0
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1answer
34 views

Something about SSD

So, I read that a SSD requires ACHI for Communication. I checked my BIOS for that, and luckily I have it. My Question is that, suppose, if I buy a SSD that consists of 70 GB. And, suppose if I put ...
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3answers
170 views

Installing software on Windows 7 very slow

Since a few days, any software installation on my Windows 7 computer is very slow. This is on a Windows 7 64bit setup of just a few weeks old (new computer). I've waited for over an hour for ...
0
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0answers
13 views

email notification computer ram higher 80%

Is there a way to email myself if a computer running window's Ram is 80% > ?I see there is performance monitor. I figured out how to use counters but I really want to make this SIMPLE to the above ...
0
votes
1answer
19 views

Why first-time reading file from hdd is slower then next ones?

I am measuring my HDD speed with a self-written program. (This is a sort of homework, so I don't need recommendations about existing tools to do that). I do it with the following piece of code: ...
0
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0answers
61 views

MacBook Air, Mavericks: 2.9GB of RAM is used at startup

Running: MacBook Air Late 2010, 13 in, 4gb RAM. Only 8gb free on SSD Immediately after booting, I opened activity monitor and this is what I saw: About 2.9GB of RAM already used up, and a list of ...
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2answers
194 views

WD Black 2.5 sata drive slow on windows 8. Sector size is 4k. What gives? 40MBps write

WD Black 2.5 sata drive slow on windows 8. Sector size is 4k. What gives? 40MBps write. This is a brand new WD black scorpion 500gb drive, on a brand new Zotac Zbox Nano CI320, quad core with 4gb of ...
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0answers
31 views

Powerful PC struggles during normal use

I recently bought a PC with the following specs: MOBO: ASRock Z97M Pro4 Chip: Intel i5 4670k RAM: 16 GB RAM 1600MHz Storage: SSD Samsung 840 EVO 250GB to boot the OS and 1TB HDD 7200rpm for data ...
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0answers
67 views

PCI-Express RAID Controllers with TRIM Support

I've an AMD Athlon computer with Windows 7 and I'd like to set up an SSD Raid 0. Are there any PCIe RAID controllers with TRIM support available on the market? The only thing in this are that I've ...
0
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0answers
14 views

Which is faster: less RAM in dual channel mode, or a greater amount of RAM? [duplicate]

So I'm thinking of upgrading the RAM on my computer: currently I have two RAM chips, one 1 GB and one 4 GB. I'm debating on what's the best way to do the upgrade to get the best performance. Here's ...
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0answers
59 views

Very poor connectivity and poor performance on high end specs

I recently got a new laptop which has very good specs, it's basically a direct upgrade from my previous laptop - a GTX860M, quad core i7 2.5GHz and 16 GB ram. My old laptop ran Minecraft at 60+ FPS ...
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2answers
66 views

Extremely slow computer [closed]

I'm using Windows 7 Ultimate 64 bit. It takes forever to boot up my computer and it is full of lag. It takes about a whole minute in the loading windows 7 screen, and after logging in (entering ...
0
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0answers
59 views

How to find out what causes Driver locked

My computer is running slow, so I decided to use RAMMap. I've found out that "Driver locked" has allocated about 10 GB of RAM. I've searched the internet, and found out that programs like VMWare, ...
0
votes
1answer
297 views

4 SSDs RAID 0 integreted vs dedicated controller

I've been thinking about setting up 4 SSD RAID 0 to gain performance in my home PC, and I ran into this review of PCI-E based SSD. If I use PERC H310 (8 lane PCI-E 2.0 RAID controller, which means ...
0
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1answer
360 views

Very slow computer but low CPU or Memory usage

My computer is very slow. All the programs and Windows itself is slow. But strangely, all the games run without lag. They are not affected somehow. I just reinstalled my computer for the 6th time ...
48
votes
8answers
7k views

Should I disable swap file if I have lots of RAM or should I move it to a virtual RAM drive?

Imagine I have tons of RAM. Let's say 64GB. That's a lot for even gaming PCs. Now the default location of a pagefile in Windows is on the main OS drive, be it HDD or SSD, which are faster in general, ...
1
vote
1answer
26 views

Open programs take forever to reload after another program used-up all the memory

I have the following phenomena: I have 4GB RAM, and sometimes I use a program (program A) which uses up all the available memory, say 3.9GB. If there are more open programs, then their memory is ...
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0answers
142 views

Extremely slow download speed, could my modem be causing it?

First off all I want to thank everyone who is reading this. This will be a long problem so I really hope someone has an answer, as my ISP doesn't. For over a month we have been experiencing ...
0
votes
1answer
24 views

iptables - I'm losing control over the box by adding new rule to the config

My set up is the following: Internet uplink (200Mbit) DMZ (1GB ethernet) Internal network (1gb internet) Log interface My gateway is serving around 600 clients with 1400 iptables rules in ...
0
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0answers
11 views

How to implement conditional sum in a smart way?

I want to implement a sum over three variable l,m,n such that l,m,n are integers that are greater or equal zero and l+m+n is equal to some integer v. As I have quite a few of these sums in my ...
1
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0answers
25 views

Is there a way to “undercommit” memory in Linux (VPS burst memory woes)?

I've been noticing occasional drastic performance hiccups in my application hosted on a VPS. My VPS plan has 1GB guaranteed RAM and 1GB "burst" RAM. Occasionally the app will become extremely ...
0
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1answer
56 views

Troubleshooting slow log on of a computer? [closed]

What tools would you utilize to troubleshoot a slow logon of a computer? How and why? Thanks in advance
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4answers
824 views

Low disk performance with Windows 8.1

I have a Dell XPS 15 (L502X) that have a Core i5-2450M, 6GB RAM and a 1TB WD 5400RPM HDD. This notebook Achilles' heel is the disk. It's slow and I understand that if I do stress it to much, it lends ...
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2answers
97 views

Intel 10Gbps card bandwidth

I have an Intel 10Gbps card that has the 82599 10GbE Controller. The card has two ports in it. The datasheet of the controller says it supports PCIe 2.0 (2.5 GT/s or 5.0 GT/s) Now, according to PCIe ...
0
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1answer
218 views

Difference between Instruction, operations and micro-operation (uop) [closed]

I am trying to understand the intricate terms related to performance of processors. Computer performance is measured in FLOPS, which is short for FLOPs per Second. FLOPs itself stands for ...
0
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2answers
52 views

Is it bad for a CPU to be running at a high speed for extended periods of time?

I have an Intel Core i7-4770S (3.10 GHz) that can go up to 3.9 GHz in turbo mode. Windows Task Manager can report it going up to about 3.5 GHz when playing certain games and probably goes higher every ...