Hardware :: Performance Difference - Dual Versus 3 Channel RAM
Apr 12, 2009
There are 3 channel DDR-3 RAM kits available on market.Would its performance be better than dual channel RAM kit, apart from RAM capacity? I'm planning to build a new box testing server consolidation on virtualizaion running Xen/Vserver/OpenVZ as software. All servers running 64bit Linux OS. My new planning is to get 2 sets DDR-3 1333/1600 4Gx2 kit. I may consider 3 channel kit dropping the total RAM capacity to 6G if it has better performance. Besides can mobo support dual channel RAM also allowing 3 channel RAM to work on it without sacrifying performance?
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Jun 25, 2011
PC seems to run fine in single channel mode but monitor reports no input in dual channel mode and memtest86+ lists from 1-3 errors per pass in single channel mode. Motherboard (Gigabyte P43T-ES3G) can't be set for the 1.65 volts required by the RAM (2x2 of OCZ3P1333LV4GK PC3 10666). The mobo voltage choices are 1.6 or 1.7 volts. I have tried both and increased the MCH voltage from 1.1 v to 1.2 v, but so far can't get it to run in dual channel mode at all and single channel mode seems to run fine but I still get errors in memtest86+. Also tried optimized Bios settings and loosened memory timings (from 7-7-7-16 to 8-8-8-27 and tRFC 60 to 70) and reset Command Rate from 0 to 2. CPU is Core 2 Quad @ 2.4 Ghz, PSU is rated at 400 watts, Video card is Gigabyte GT220.
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Jul 14, 2011
Thinking about building a new system, with 4GB of DDR3 RAM. I am just wondering, which would you prefer: Dual-channel DDR3 or Quad-channel DDR3? Does one have better speed performance over another? Will one way keep your system cooler?
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May 22, 2011
What is the difference between RAID versus LVM?
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Jan 13, 2011
I have a script that basically adds a zypper repo, then proceeds to install and configure FreeNX.To add the repo:
Code:
zypper addrepo Index of /repositories/X11:/RemoteDesktop/openSUSE_11.1 RemoteDesktop
To install FreeNX & it's relevant dependencies:
Code:
zypper install FreeNX
To setup and configure FreeNX:
Code:
nxsetup --install --setup-nomachine-key --clean --purge
sed -i 's/AllowUsers idcuser/AllowUsers idcuser nx/' /etc/ssh/sshd_config
service sshd reload
[code]....
After completing these steps on version 11, I can immediately open the FreeNX client (windows 7), and connect. On 11.1, at the very end of the FreeNX connect, just after "Dowloading the session information", I get:
Code:
NX> 105 startsession --link="lan" --backingstore="1" --encryption="1" --cache="16M" --images="64M" --shmem="1" --shpix="1" --strict="0" --composite="1" --media="0" --session="170.224.164.19" --type="unix-gnome" --geometry="1274x956" --client="winnt" --keyboard="pc102/en_US" --screeninfo="1274x956x16+render"
Permission denied (publickey,keyboard-interactive).NX> 280 Exiting on signal: 15 I've googled this to death, and tried a bunch of random changes to both ssh and nxserver, but I can't seem to get rid of it. What might have changed from 11 to 11.1 that could cause this behavior change? The NXserver seems to be configured and running identical on both systems.
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Mar 11, 2010
It is my understanding that building from source is slightly faster since the created binary will be specific to the current kernel/system. This seems to have the drawback of when the kernel is upgraded the source compiled package will no longer work...but this is not always the case. So what kernel upgrades will cause a package from source not to function? Side bar to that, I have a package that is only available in source format that I need to install on numerous hosts. It seems that the upfront work of creating my own RPM for this package is worth it to make managing the package more efficient, and I think I have two choices: src-rpm and standard binary rpm. If I build a src-rpm and I distribute that for installation will a kernel upgrade 'break' the package since it is actually being compiled for a specific kernel at the time of install? So far I have found a lot of information, and have spent time reading the rpm docs, etc, but I don't feel like I have a good grasp of what the specific portability differences are between source, src-rpm, and rpm.
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Jul 3, 2009
I recently made an Ubuntu liveCD for a family member, and tested it myself first. It impressed me, so I might possibly be interested in switching distros; but I'm not very familiar with Gnome(GNOME?), so I might try Kubuntu instead. Am I correct in understanding that the only difference is Kubuntu uses KDE (hence the K)? If there are other differences, does Kubuntu share the limited user control that I've heard Ubuntu has, such as locking the root account by default?
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Aug 31, 2010
I am preparing to purchase a new laptop, with Ubuntu 10.04 built in, from System76 with 8.0 GB DDR3 1333 MHz RAM, ATI 4570 graphics with 512 MB GDDR2 memory, 500 GB 7200 RPM SATA II hard drive, and I get to choose a CPU. I am wondering: 1) Would I get better 1080p video playback performance with a dual core Core i7-620M or quad core Core i7-840QM CPU? 2) What is the best playback software in Ubuntu that takes full advantage of such a CPU, and also the GPU?
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Feb 7, 2010
Does kde3.5 differ much in memory requirements from kde4? I'm running kde4 on an old thinkpad with 256mb ram and everything is a little slow...
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Apr 11, 2011
I am currently using the 32 bit version of Ubuntu on my 64 bit laptop. My question is, does using a 32 bit version on said hardware reduce its performance (i.e will battery life be reduced, system be under more load, etc.)?
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May 26, 2010
I am currently running Ubuntu 1004 but I have the OS installed on a USB 2.0 hard drive because my normal hard drive caved. However I am having problems because there is a SEVERE lag on my system. So my question is if I buy like a 16 GB USB 2.0 and use that instead of my 4GB one will it make a performance difference? My laptop is the Dell Latitude D600(1GB RAM, 1.6 Ghz Processor, ATI Mobility Radeon 9000) and I AM NOT in the market for a new laptop or a new hard drive. Edit: What about buying an external hard drive and using that instead of USB's?
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Apr 10, 2010
Now, I'm ready to run my program, and my code is based on 32bit version. So I run the program on Ubuntu 9.10 32bit. And I got running time for 48s. But that's a bit slower than I expected; the program has bunch of File I/O processing but the result(48s) just doesn't make sense compared to given initial data set. So I just run the same program and same initial data set on Ubuntu 9.10 64bit ver. Then, bang!! it took 1.4s to finish the job.
Do you have any thoughts what kind of fact might make this significant difference? The differences b/w those two OS are "32 vs 64" and 32bit version has Java SDK, Eclipse, Apache2, Mysql, PHP, CGI, and python. We-server service is running but because I'm not really running web server. Did the result come from these background programs?
-- I tested it on the both OS in the same situation as possible as I can.
(reboot->test)
-- BTW 64bit one doesn't have those programs. I just installed on my external hard drive, so it's literary PURE one. (32bit one also in the same HDD)
-- I run these Ubuntus on VMware
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Sep 7, 2010
I have a 64-bit computer but 64-bit distros have been giving me huge problems when using 32 bit apps or trying to install 32-bit libraries, so I think I'm going to just switch to 32 bit. Will I notice much of a hit in performance? This computer is mostly used for web and games, nothing particularly cpu-intensive (no graphics rendering, etc)
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Apr 22, 2011
I have installed several different distro's over the last coupled of weeks and have finally as intended come back to 11.4. Last time I installed it my pc was fitted with an older nvidia card and I installed a newer 200 series and got it to work with X11 using the nvidia driver. This time I did the install with the new card in and things haven't gone the same way. I have finished up with the os drivers on my system, nouveau and "swrast (No 3D Acceleration) (7.10)". Performance wise it's way way behind the nvidia driver.
Glxgears for instance runs at under 1/2 the speed even at a lower resolution. I suppose I could still configure to suite my monitor but given that difference in performance would you? I have done what I can easily do with repositories but no signs of nvidia drivers. I can download one as I did last time but from what I have read previously the above drivers may mean that I have to recompile the kernel. A simpler solution might be to re install with my old card in. Can't say I'm too keen on either option. Some distro or the other had a driver helper and installed the nvidia one perfectly.
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Aug 1, 2011
Doing some research I was leaning towards buying an inexpensive laptop and either install linux or buy one already installed (maybe Debian or Ubunutu). The uses for this laptop would be for developing linux device drivers and having the option to control the OS for any customized applications which I could develop. Didn't want to go the dual boot with Windows approach.
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May 27, 2011
Until now I have been running a single threaded cpu at single channel speed but yesterday I bought a 3.2 gig p4 for 20 bucks. It has hyperthreading and an 800 mhz fsb which supports dual channel speeds on the chipset. It hasn't arrived yet so I haven't put it in the system but what I would like to know is whether 11.4 work properly with these changes, and will it detect and implement them properly or will I need to reinstall it?
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Mar 10, 2011
I have a Macbook 7.1 (the white one)
2.4GHz Intel Core 2 Duo
2GB DDR3 memory
250GB hard drive
I'd like to install Ubuntu on it because I really love the way Ubuntu is developing and becoming much more user friendly. My use will mainly be for browsing, working with wordprocessors and maybe downloading series from torrents. My question is, should I dual boot or single boot? My personal preference is to single-boot, I just like the idea of having one OS running on the machine. What are the cons of doing that? Also, If I want to dual boot just to keep the firmware updates. How much space should I designate for Ubuntu and how much for Mac OS?
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Jun 29, 2011
I'm trying to crack my wep password just for kicks, but I keep running into the same error. When I try to use airplay-ng for the packet injection, it always gives me the error " wlan0 is on channel -1, but the AP uses channel 6". I've tried setting wlan0 to channel 6 manually, but that doesn't help. I spent a while searching for a solution, but it seemed like each page had a different, usually highly complex solution, that still doesn't work. I have the most recent drivers for my wireless card, and it meets all the requirements. So, is there any solution to this that will actually work?
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Apr 15, 2011
Does installing both M$ Windows 7 along side Ubuntu cause performance loss? Also is there a special way the HDD should be defragmented?
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Feb 24, 2010
My dvd burner manual speaks about 'dual-layer and/or double-layer' recording. Is there any difference between them?
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Jul 27, 2011
This is a thread I've moved over from the install forum and is hopefully more focused. Sorry if I have violated some protocol. Problem I have a new machine build configured to dual-boot Windows 7 and OPENSUSE 11.4. Network performance in Windows is very good but network performance in OPENSUSE is very poor.
[Code]...
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Jul 31, 2010
I just wanted to know if having my laptop set to ondemand, will this affect performance in any way? I realize it increases the clock speed to performance when the CPU is under load, but does the time it take to go from ondemand to performance affect speed? Will there be any noticeable difference between the two setups? I have a dual core intel at 2.2GHz when in performance. When ondemand is set with no load it downclocks to 800Mhz.
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Mar 26, 2011
I've decided to give PulseAudio a try and since it is working almost without any problems; the only problem I haven't been able to solve (even after some searching through the Internet) is this one:At the moment I've got only 1 mixer channel for output, called Internal Audio Analog Stereo. Now this channel controls both the volume going to the integrated speakers of my notebook and to headphones as well. What I was trying to do is to separate those channels in the same way how ALSA does it without PulseAuio.ALSA Situation without PulseAudio:~ Master ~ Speaker ~ PCM ~ FrontALSA with PulseAudio: ~ Master (controls everything)I was hoping to use the Master and Speaker in PulseAudio. My attempts were unsuccessfulHere are some tech data about my distro, ALSA, PulseAudio and sound card:Linux Distro info + PulseAudio USE Flags:
Code:
Distro: Gentoo Linux
$ uname -srmp
[code]....
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Feb 8, 2009
I have search using yum and other sources however I do not find qmail available via yum.
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Mar 30, 2011
I've installed openSuse 11.4 and since then kmix shows just one channel (ALSA Plugin. plugin container)
in openSuse 11.3 I could change one master channel a channels for my subwoofer and an other speaker.
How can I add the other two channels to kmix?
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May 11, 2011
I have a 4.1 surround setup that the computer sees a 4 channel setup (stuff going to subwoofer is split out in hardware so all the computer sees is the front and rear l/r channels).
All well and good, but phonon isn't giving me an option to set my output to 4 channels, only stereo (which means my rear speakers are useless) or 5.1 (which makes me fear losing channels if I play anything with actual surround sound).
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Aug 31, 2010
I have a creative sound card (ca106 driver) detected and working. This is a 5.1 capable soundcard and i also have 5.1 speaker system. The sound card works, however, the problem is that only the front speakers are working. I have checked vlc settings, in which front speakers, centre and rear are seen as different devices.
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Mar 19, 2010
found one other post with this same issue, and the final reply was "I give up"...I got a fresh 9.1 install. I just want to record some audio, but it's only recording on one channel, the left channel.I tried audacity and sound recorder. checked the sound preferences, Hardware set to Analog Stereo Duplex. In audacity Preferences > Devices > Recording, 2 (Stereo) is selected.When recording in audacity the output meter for the left channel shows activity while the right channel looks like it goes up a little bit but doesn't peak like the left channel. I hear fuzziness in the right but all the sound is in the left
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Sep 5, 2010
I have a fresh install of Ubuntu 10.04 and I cant seem get the sound working properly. I have a checked to make sure that nothing is muted, and I do have sound over the rear channel when I change the wiring on the physical machine. However, I get no sound over the headphone channel. I also changed the conf for pulseaudio to have a default of 2 sound channels. In addition the sound works fine in my Fedora 13 and Win 7 installs, this is a triple boot machine .
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Feb 26, 2011
When I'm on Vista (I dual boot by the way) I see that my hard drive is about 13Gb smaller than it used to be, but I have no access to Ubuntu's files. However, when I am on Ubuntu I have access to a drive (is it a drive?) I believe is called OS and when mounted it lets me access all of Vista's documents.
Also I do not understand the difference between /home, OS, and System Files (It might be named something else, but the icon looks like a hard drive I believe).
I realize all this is pretty vague, but do you know a way to block this connection? I feel like Harry Potter looking into Voldemort's mind (lol).
PS Despite the Voldemort reference I am not a MS Windows hater.
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