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  • Which motherboards support ECC RAM and USB 3.0?

    - by dandv
    I'm gathering specs to build a highly reliable file server, somewhat future proof for the next 3-5 years. The component I'm starting with is the motherboard. Are there motherboards that have been shown to support ECC RAM (and which particular models?) and also USB 3.0? I've read that there are such chipsets with ECC support, but motherboard manufacturers won't guarantee they work, or won't even offer the required BIOS options.

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  • USB sticks optimized for OS booting and virus removal [closed]

    - by Rupert
    I'm looking to buy some usb sticks which will mainly be used in tech support for the purposes of removing viruses and booting up various OS's. Therefore, I am looking for the following features: Write protected switch (so that they may be safely plugged in to potentially infected machines) As fast as possible (so that loading, for example, a windows recovery, doesn't take forever) At least 4GB in size Any other features that might be useful for the above purpose Price is no object but, of course, the cheaper the better.

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  • USB mouse shuts down the laptop!

    - by Ryan
    For the past two days, whenever I plug in my USB mouse (which has been working for a long time, previously) into the laptop, my computer restarts! I tried changing mice, but the same thing happens. I have 3 ports, usually, I try one port and the laser does not come on, then I try another one and the laser comes and and off, then I again take out and put it in any port and the damn thing just turns off the computer. Specs: Windows 7 Ultimate 64-bit, 4GB RAM, Fujitsu 532ah i5 laptop

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  • Hooking up a multifunction printer via network and USB

    - by C-dizzle
    I have a Dell 2155CDN Multifunction printer that is hooked up through our network. But when using the scan feature, it is terribly slow, and I assume it has something to do with it scanning through the network port. Is it possible to leave the printer hooked up across the network, but also attach it to a computer via USB just for the scanner? Or would doing this confuse the printer not knowing which port to use for each feature?

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  • Recommended USB 3.0 PCI/PCIX adapter for older Dell

    - by user32996
    Can anyone recommend a USB 3.0 adapter for my older Dell server? It does not have PCI express (PCIe) so I was looking for PCI or PCIX. I have been burned in the past installing "desktop" class drives on servers (i.e. blue screens under heavy load) so I would rather pay more to get something reliable. We are hoping to get better speed on our backups to an external drive, even 10% improvement would be worth it.

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  • Lost data after removing USB stick...

    - by Jivings
    I foolishly removed my USB stick from a Windows XP machine seemingly without unmounting it (or whatever the Window equivalent is..). Anyway, on inserting the stick into my linux machine, the file I was working on shows up, but it is completely empty (0KB). Since I'm pretty much a Windows novice these days, I'd like to know if there is any temporary location where I will still be able to find this file, or is it now lost permanently?

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  • Automatically copy files to USB drive when connected

    - by Daphna
    I am looking for a solution for copying all the files from a specific directory on the hard drive, to a specific directory on a USB memory device, once this device is connected. I have a program that downloads podcast episodes for me. I would like these files to be automatically moved (or at least copied) to my mp3 player once I connect it to the computer. I have both windows xp and linux machines, so a solution for any of them will work for me.

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  • No speed-up with useless printf's using OpenMP

    - by t2k32316
    I just wrote my first OpenMP program that parallelizes a simple for loop. I ran the code on my dual core machine and saw some speed up when going from 1 thread to 2 threads. However, I ran the same code on a school linux server and saw no speed-up. After trying different things, I finally realized that removing some useless printf statements caused the code to have significant speed-up. Below is the main part of the code that I parallelized: #pragma omp parallel for private(i) for(i = 2; i <= n; i++) { printf("useless statement"); prime[i-2] = is_prime(i); } I guess that the implementation of printf has significant overhead that OpenMP must be duplicating with each thread. What causes this overhead and why can OpenMP not overcome it?

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  • ScrollView scrolling speed

    - by Psudheer_iph
    hi all, thanx in advance. In my app, i am having 2 scrollviews in view.first scroll is placed bottom and then second Scroll placed. if i scroll either first or second both will scroll depends on finger movements. this is working. But my question is, i want the scrolling speed is different for first scroll and second scroll eg. if first scroll moves 2px speed then second scroll has to move double the speed of first scroll i.e 4px. How can i solve this.

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  • How to find out if my hosting's speed is good enough?

    - by Mert Nuhoglu
    There are lots of different online performance tests: Google PageSpeed Insights iWebTool Speed Test AlertFox Page Load Time WebPageTest Also there are several desktop/client software such as: ping tool YSlow Firebug's Net console Fiddler Http Watch I just want to decide if my hosting provider has a good enough performance or if I need to switch my hosting to another provider. So, which tool should I use to compare my hosting provider with other hosting providers?

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  • In what way does non-"full n-key rollover" hinder fast typists?

    - by Michael Kjörling
    Wikipedia claims (although the latter claim does not cite a source) that: High-end keyboards that provide full n-key rollover typically do so via a PS/2 interface as the USB mode most often used by operating systems has a maximum of only six keys plus modifiers that can be pressed at the same time.[4] This hinders fast typists, ... In what way would the system being able to recognize only six non-modifier keys at once hinder a fast typist? I consider myself a relatively fast typist and I usually press one key, plus modifiers, at once; I can't imagine any real-life situation in which the system only recognizing six non-modifier keys being pressed at once has been a limiting factor in my keyboard usage. (Multi-stroke keyboard shortcuts as used by high-end software like Visual Studio, Emacs and the like are a different matter.) Note that I am not really interested in answers centered around multiplayer computer games; I'm looking for answers that give reasons that would be relevant to typists, somehow supporting the statement made on Wikipedia.

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  • Trouble with speed and vectors

    - by Eegabooga
    I'm working on adding bullets to my game. Right now I can shoot bullets in the direction that I would like from a ship by getting the ship's angle: int speed = 5; int dx = -(cos(degreesToRadians(ship.angle)) * speed); // rate of change in the x direction int dy = -(sin(degreesToRadians(ship.angle)) * speed); // rate of change in the y direction bulletPosition.addX(dx); // addX(dx) is simply bulletPosition.x += dx bulletPosition.addY(dy); The ship is pretty much the exact same thing, except I use the += operator: int dx += -(cos(degreesToRadians(angle)) * 0.15) int dy += -(sin(degreesToRadians(angle)) * 0.15); shipPosition.addX(dx); shipPosition.addY(dy); I would like to be able to add the ship's velocity to the bullet's velocity, but I'm a little confused as to how should get the speed from the ship's vector. I thought that adding the ship's dx to the bullet's dx like int dx = -(cos(degreesToRadians(ship.angle)) * speed * dx) would work because I'm adding the rate of change of the ship to the rate of change of the bullet, but that doesn't work. So here's the final question: How can I get the speed of my ship and apply it to my bullet's speed? Thanks in advance for all help :)

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  • Android Game Development problem whith size and speed

    - by Charlton Santana
    I have been coding speed for an object. I have made it so the object will move from one end of the screen to another at a speed depending on the screen size, at the monemt I have made it so it will take one second to pass the screen. So i have worked out the speed in code but when I go to assign the speed it tells me to force close and i do not understand why. Here is the code: MainGame Code: @Override protected void onDraw(Canvas canvas) { setBlockSpeed(getWidth()); } private int blockSpeed; private void setBlockSpeed(int screenWidth){ Log.d(TAG, "screenWidth " + screenWidth); blockSpeed = screenWidth / 100; // 100 is the FPS.. i want it to take 1 second to pass the screen Math.round(blockSpeed); // to make it a whole number block.speed = blockSpeed; // if i dont put blockSpeed and put eg 8 it still tells me to force close } Block.java Code: public int speed; public void draw(Canvas canvas) { canvas.drawBitmap(bitmap, x - (bitmap.getWidth() / 2), y - (bitmap.getHeight() / 2), null); if(dontmove == 0){ this.x -= speed; } }

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  • Unable to make sound play in headset

    - by user50849
    Top right, I click the sound icon, select sound settings, and connect my USB-headset. I can them see the headset being detected as it pops up in the menu. I click it, and expect the currently played audio to get sent to the headset instead. My problem is that it does not. The audio keeps playing through the built-in speakers. More info: The icon for my built-in card in the sound settings is a circuit with a note symbol on top. The symbol for the headset is just black background with a "No" symbol on it. Might mean it doesn't work somehow. I installed pavucontrol, and notice that no second sound card shows up in there. When connecting, the syslog says Jun 20 09:38:46 yuna kernel: [40144.553431] usb 2-1.2: new full-speed USB device number 11 using ehci_hcd Jun 20 09:38:46 yuna kernel: [40144.650609] input: C-Media USB Headphone Set as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2:1.3/input/input20 Jun 20 09:38:46 yuna kernel: [40144.650895] generic-usb 0003:0D8C:000C.000B: input,hidraw0: USB HID v1.00 Device [C-Media USB Headphone Set ] on usb-0000:00:1d.0-1.2/input3 Jun 20 09:38:46 yuna mtp-probe: checking bus 2, device 11: "/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2" Jun 20 09:38:46 yuna mtp-probe: bus: 2, device: 11 was not an MTP device

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  • socat usage for FIFO speed vs socket speed on localhost

    - by Fishy
    Hello, As per a suggestion on stackoverflow, to compare IPC on a single machine using a) sockets (TCP) on localhost to localhost b) using FIFOs (between Java and C) To answer (a), I used netcat to gauge transfer speed (91 MBytes/sec)[1] (b) Q: How can I test FIFO write speed using socat? My approach(where /tmp/gus is created using mkfifo on RHEL): dd if=/dev/zero of=/tmp/gus bs=1G count=1 but i get: 1073741824 bytes (1.1 GB) copied, 1.1326 seconds, 948 MB/s Does this mean writing to a FIFO ~10 times faster? Or is my experiment completely wrong ? Thank you Sporsi [1] From machine A to B across 1Gbps link, this number dropped to ~80 MBytes/sec - I expected localhost to be much higher ...

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