Help on power of 7

please help

Now not joking: how is that a power of 7?It's the definition of x^7. You multiply x with itself 7 times. Much faster than to invoke the Math.pow method. It probably does something like this and e and ln are slow,
x^y == e^[y*ln(x)]

Similar Messages

  • Going to Australia and need help with Power converters

    Facts:
    US uses 110v on 60hz
    Australia 220v on 50hz
    Making sure I understood that correctly.  Devices I plan on bringing that will use power are PS3 Slim, MacBook Pro 2008 model, and WD 1TB External HDD.  My DS, and Cell are charging via USB to save trouble of other cables.
    Ideas I've had or thought of:
    1.  Get a power converter for a US Powerstrip, and then plug in my US items into the strip and then the strip into an AUS Converter into Australian outlet.  Not sure if this fixes the voltage/frequency change.
    2.  Get power converters for all my devices.  But, not sure if my devices needs ways of lowering the voltage/increasing frequency or something to help with the adjustment.
    3.  Buy a universal powerstrip, which is extremely costly and I wouldn't be able to have here in time (I leave Thursday).  Unless Best Buy carrys one.  

    godzillafan868 wrote:
    Facts:
    US uses 110v on 60hz
    Australia 220v on 50hz
    Making sure I understood that correctly.  Devices I plan on bringing that will use power are PS3 Slim, MacBook Pro 2008 model, and WD 1TB External HDD.  My DS, and Cell are charging via USB to save trouble of other cables.
    Ideas I've had or thought of:
    1.  Get a power converter for a US Powerstrip, and then plug in my US items into the strip and then the strip into an AUS Converter into Australian outlet.  Not sure if this fixes the voltage/frequency change.
    2.  Get power converters for all my devices.  But, not sure if my devices needs ways of lowering the voltage/increasing frequency or something to help with the adjustment.
    3.  Buy a universal powerstrip, which is extremely costly and I wouldn't be able to have here in time (I leave Thursday).  Unless Best Buy carrys one.  
    Check the specs on input voltage/frequency of your power supplies.
    Many laptop power supplies are "universal/global" and are specced something like 80-265 volts AC 50/60 Hz, but not all.  These will just need a connector adapter.
    Unsure about the PS3 Slim - if it isn't universal it could be difficult as you'll need a 110/220 transformer, one big enough (power-handling wise) for the PS3 will be very bulky.
    For the external WD HDD, if it doesn't have a universal supply, you're probably best off just finding a new wallwart for it that is capable of running on 220/50.
    *disclaimer* I am not now, nor have I ever been, an employee of Best Buy, Geek Squad, nor of any of their affiliate, parent, or subsidiary companies.

  • Need help with power supply & graphics card upgrades

    I have a HP Pavilion p6320y that I bought 8 months ago. AMD Phenom II x4820 Quad Core processor.   I play WoW and since the last big patch, have been suffering with low fps. I updated drivers and followed all the advice given to me by Blizz and finally figured out that my Nvidia GeForce 9100 (integrated graphics) isn't good enough anymore.
    I checked my computer and discovered that I have a 300w power supply (12V) and read on another post here that something stronger than 300w is needed to run a decent graphics card.
    Now for my questions:
    How much of a power supply can I upgrade to without hurting my computer, but will be enough to run a good card?
    What would be a good graphics card for this computer?
    I've been looking at the Nvidia GeForce GTX 460 1GB GDDR5 PCI Express graphics card and wonder if that will work on my computer.  Most of the nicer cards seem to be the PCI Express and I'm not sure if that will work.
    Any advice will be most helpful. I have some experience with the inner workings of my PC and would like to fix this myself instead of running to the closest computer shop and paying someone else to. Thanks!
    This question was solved.
    View Solution.

    Well, you are starting out from a fairly low baseline with the integrated graphics. It will not cost much to have a substantial increase if all you want to do is run WoW without error messages. Yes, the 300w power supply is an issue and rules out any card that will require its own power (i.e. needs its own power cord like a hard drive) but there are several mid-grade cards that can run off bus power alone (i.e. just from the pci-e slot itself). Just taking a quick look at newegg.com I see the following:
    GeForce 9400 under $50
    Radeon HD 4650 under $50
    GeForce 9500GT a little over $50
    Any of these should get you where you want to be and not require a PS upgrade. The slot you have available is a PCI Express x16 slot so don't look at AGP cards; they will not work. If you want to install the card you mention you need to get a better PSU.

  • Need help with power supply.

    My computer will not come on at all. When you hit the power switch on the power supply, all the fans in my computer begin to come on for a second but stops. Can someone help me. I 've tried 3 power supplies and none of them worked.
    nVidia K89 Neo2
    Arctic Cooling freezer 64
    TNT2 Rage
    Sony DVD-writer
    AMD 64 3500+

    hammonton
    Quote
    randyorton 1st Post
    My computer will not come on at all
    Quote
    When you hit the power switch on the power supply, all the fans in my computer begin to come on for a second but stops
    Quote
    randyorton 2nd Post
    That's the thing. It won't come on at all
    Its good to help
    Quote
    I've had this problem before and solved it by clearing the CMOS
    but please read the post.

  • Need Help with power supply reccomendations for my graphics card

    hi
    i have a MSI GeForce GTX 780 Graphics card... i built my own system, i also got a rosewill rx750 power supply in it which i think is causing me problems, the computer works great until i get into games like titan fall and try and get into a game then it restarts the computer on its own.. has done this with a few games, but it works fine when surfing the net and so forth, i have read its to do with the power supply being week and also read my chosen power supply isnt that good... anyone got any recommendations for me that i should look at or am i looking in the wrong direction with whats wrong with my pc... any help would be great thanks

    yes the PSU is  the most important choice out there and corsair and seasonic are the best out there! (never buy cheap PSU's as like abvolt said a cheap one can easily kill your more expensive parts)
    Cheap PSU = made of the most cheap parts they could get "think cheap shanghai parts are used that may be of any quality good or awful as its just what they could get for the lowest price" (ever bought anything that was super cheap they break very easily)
    Quality PSU = the use of good quality well made parts and will have very good testing done on them to make sure they are stable and pass very tight regulations and conform to specs for 10-30 different factors each.
    a cheap low quality PSU I class as a paper weight as it will never go near a computer (maybe i would use one as a basic bench PSU for things i do not care if they die or just for testing a fan or something that rubbish dirty power is not really a major problem but silicon is not tolerant to dirty power and will kill parts)

  • Help : Simple Power Supply Filter

    First , thanks to everyone who answered my question on "time step too small".
    I am in the filter stage of a very simple power supply. However, when I connect a capacitor to the output of my rectified signal, the output signal of the load is not what I expect to see.
    I expect it to be fairly constant, and located at the peak of the input voltage.
    Any help will be deeply appreciated.
    I have attached the circuit to it.
    Thank you.
    Attachments:
    Bridge Rectifier.ms9 ‏945 KB

    O.K. Here's a picture of your circuit with the PI Filter attached to it. I just arbitrarily selected the components to use. I used low value caps so you can still see a slight ripple on it. A larger capacitor at the end of the bridge will filter this ripple almost completely out. Most circuits I have seen usually have this cap set somewhere in the 100uF-300uF range and the output capcitor in the range of 10uf-50uf range.
    I can't remember the formylas for designing a PI Filter, but I am sure if you search the internet there are resources that can help you with that. I think I may refreshen my memeory on this subject as well.
    Here's the picture and I hope this works for you.
    Kittmaster's Component Database
    http://ni.kittmaster.com
    Have a Nice Day
    Attachments:
    Bridge Rectifier PI Filter.JPG ‏147 KB

  • Help! power supply

    i bought a compaq CQ5110Y and wanted to get a ati radeonHD 4650 1gb ddr2 pci E video card but this video card
    needs 400W. I have a LC-B450 E power supply from my other pc and i was wondering if i could replace it with this one.

    Hi, Rennwerkes.
    have a look here:
    http://discussions.apple.com/message.jspa?messageID=9285919#9285919
    here
    http://discussions.apple.com/thread.jspa?threadID=1967590&tstart=30
    and here:
    http://jimwarholic.com/2008/11/apple-imac-g5-power-supply-issues-and.php.
    I think i saw new PSUs in the US offered for about $140. Here in Europe they are twice as expensive...
    however, temperature problems might indicate a different source for the problems. Are the venting channels clean and the fans running? The G5 processor is quite hot - since short i have an Intel, and it's much less heating up! - especially if you have graphics or many windows open. (It depends also n which model you have)
    There are also DVM's (Digital Voltmeters) with which one can measure a capacitor, but my attempt to do this with the capacitors on the PSU was not successful, probably due to the residual capacity of the surround print parts.
    If you have access to a decent fast oscilloscope, you can check the PS voltages. If they are stable and without spikes, then the PSU is fine. If they are spikey, then a new capacitor can help.
    Hope this helps
    Thomas

  • Need help in power saving utility (Satellite M40x)

    Hi all
    I am new in this forum, I need a help, as when ever I am pressing Toshiba power saver it tell me that I have to open the windows power options and use the Toshiba power saver but I can find it there in the schemes I think I deleted it by mistake from schemes scroll.. So how can I restore it so I can use Toshiba power saver?
    My notebook is Toshiba Satellite M40x
    plz reply soon also u can add me to your msn messenger : my id is :
    [email protected]
    Thx in advance
    adham

    When you push the button, toshiba power setting should appear without any message. I set up parameters directly from Toshiba utility so the message you get to open windows power management reveals there is a problem.
    Try to reinstall toshiba power saver utility from the recovery cd or you can download it from the drivers download in the official site.

  • ITunes opens when I click help in Power Point

    I was changing format on a video and now anytime I click help in MS Power Point, iTunes opens.  Help!

    There is a bug with syncing that causes iTunes to crash at the end of a sync, or at the end of it's communcations with whatever device that you would sync with. If you remove your device from the dock, you should be able to use iTunes, but you won't be able to sync until Apple fixes the problem.

  • Help! Power-off Recovery

    Brand new to iMac and I screwed up already.
    I put my iMac to sleep with a number of items still open, specifically a Numbers doc and my iTunes. I then unplugged my iMac to move it (without shutting down) and then it froze when I turned it back on and tried to play music with my remote. I then powered off by pressing the off button. Everything seems to be working fine EXCEPT that my personal library is not showing in iTunes and I can't open the Numbers doc that had been open when I power off (although the saved doc is showing up in Finder).
    Can anyone help with suggestions on how to recover? It's not the end of the world although I would like to save a few hours work on the Numbers doc?
    Thanks in advance -- I am definitely a Mac convert -- just need some help reprogramming my PC brain from ctrl-alt-del.

    Thanks for the quick reply -- did as you suggested but no luck. I restarted thereafter but still no luck. The iTunes issue is not that big a deal -- I can just re-sync from my iPod.
    But I really would like to recover the Numbers doc -- it's showing up in my saved docs but when I try to open I get the error message that ir can't be opened. Any other suggestions?

  • Help, Broken Power Button- Can't turn on laptop

    Hi,
    I have an iBook G4 that does not turn on. The power button is unresponsive and doesn't do anything when pressed.
    I'm hoping there's a key combination I can press to boot it up? (one that doesn't involve pressing the power button)
    It's a school issued computer so I can't open it up, and since it's summer break I can't take it to our tech office.
    Any help would be appreciated.
    Thanks.

    The Power Key is about it, for starting up an iBook.
    There may be something else wrong with the computer
    which an expert or genius may be able to perform a
    basic troubleshooting effort to find what that may be.
    Troubleshooting portables that won't turn on or start up:
    http://support.apple.com/kb/TA25686
    Some processes to troubleshoot and try to get it to work
    may involve several different things; including seeing if
    the computer could work with the power adapter only,
    with the battery removed. Or see if the power adapter
    may be needed to start the computer. Narrowing down
    the possible sources of problems, to include inspection
    to see if the power button is broken, would be needed.
    If the battery is fully charged, and this implies the cell
    is good and not been used up, perhaps simply resetting
    the Power Management Unit (PMU) may help.
    Without seeing the computer, some things are more
    trial and error than others. If an Apple Store is within
    reasonable distance, a call ahead to see if they have
    an available genius or other person at a specific time
    who can look over your computer; this may be helpful.
    I suspect the issue may not be the Power Key; but
    if that is the case, it would require a repair. And if
    that happened to be the situation, someone at the
    school would have to authorize it (unless you were
    to be generous and send it off to someone capable
    such as wegenermedia.com for a quality repair.)
    Actually, if it's the Power key, a technician would have
    to take the computer apart down to the logic board...
    & a tech could decide how or what to do about it. In
    some cases, certain repairs may be costly.
    The instructions here are on how to perform a PMU reset:
    Resetting PowerBook and iBook Power Management Unit (PMU)
    http://docs.info.apple.com/article.html?artnum=14449
    Good luck & happy computing!
    edited.

  • Help, Bootlooping, Power and Home both broken

    I have an iPhone 5
    Screen cracked a few months ago, apple wanted $250 to fix it. Took it to another guy who did it for $140. Basically a terrible experience. Power button was broken at time, and part of the $140 was supposed to go towards fixing the power button. He couldn't fix it but wouldn't refund my money. He also claimed that the home button had been broken when I brought it in. It had been perfectly fine. He replaced it anyway even though it was fine, and replaced it with a cheap part that clicked loudly and sounded like it was breaking the button every time. He also managed to break the ear speaker, so I had to make all my calls with either headphones or on speakerphone, but after 3 weeks of taking it back and trying to get him to fix part after part and him just making it worse I just gave up on the guy.
    Terrible mistake, I realize that now.
    Eventually the home button stopped working as well. So at this point I had to wait for a notification or plug my phone into the charger to get the screen to turn on.
    Couldn't take it to apple bc warranty was voided when other guy fixed screen.
    Decided to try to jailbreak, so I could use activator to set the home and power button functions to the volume up and down buttons.
    During jailbreak I got stuck on a bootloop (apple logo forever).
    Can't go into DFU (recovery) Mode bc both buttons are broken.
    Computer wont recognize phone at all.
    Tried RecBoot but it wont recognize my phone either.
    I got the "ItunesMobileDevice.dll is missing" error
    Did some research and downloaded ItunesMobileDevice.dll and QTMClient.dll and put them in
    C:/ Program Files / Common Files / Apple / Apple Application Support / RecBoot
    Ran Recboot and now I'm getting a Console (Terminal) Window that says
    "USBMuxListenerCreate: No Error"
    What can I do besides buying a new phone? I'd really like to keep this one seeing as over the past 20 months I've been paying into the $650 full price, as well as $200 spent on repairs and additional chargers.
    I would greatly appreciate any reccomendations that anyone has. Even if its just a hairbrained idea.
    Also, any comments like "shouldn't have gotten it repaired by the other guy" and "shouldn't have tried to jailbreak" are really not helpful.
    I'm running Windows 7 if that makes any difference.

    During jailbreak I got stuck on a bootloop (apple logo forever).
    Read the last paragraph of this article first, which also applies to this forum
    Unauthorized modification of iOS has been a major source of instability, disruption of services, and other issues

  • Help broken power button

    my ipod touch power button is broken and in recovery mode i tried to restore it but it didnt work i mean iTunes  was there and it said do u want to restore it when it looked like it was done nothing happened

    The Power Key is about it, for starting up an iBook.
    There may be something else wrong with the computer
    which an expert or genius may be able to perform a
    basic troubleshooting effort to find what that may be.
    Troubleshooting portables that won't turn on or start up:
    http://support.apple.com/kb/TA25686
    Some processes to troubleshoot and try to get it to work
    may involve several different things; including seeing if
    the computer could work with the power adapter only,
    with the battery removed. Or see if the power adapter
    may be needed to start the computer. Narrowing down
    the possible sources of problems, to include inspection
    to see if the power button is broken, would be needed.
    If the battery is fully charged, and this implies the cell
    is good and not been used up, perhaps simply resetting
    the Power Management Unit (PMU) may help.
    Without seeing the computer, some things are more
    trial and error than others. If an Apple Store is within
    reasonable distance, a call ahead to see if they have
    an available genius or other person at a specific time
    who can look over your computer; this may be helpful.
    I suspect the issue may not be the Power Key; but
    if that is the case, it would require a repair. And if
    that happened to be the situation, someone at the
    school would have to authorize it (unless you were
    to be generous and send it off to someone capable
    such as wegenermedia.com for a quality repair.)
    Actually, if it's the Power key, a technician would have
    to take the computer apart down to the logic board...
    & a tech could decide how or what to do about it. In
    some cases, certain repairs may be costly.
    The instructions here are on how to perform a PMU reset:
    Resetting PowerBook and iBook Power Management Unit (PMU)
    http://docs.info.apple.com/article.html?artnum=14449
    Good luck & happy computing!
    edited.

  • PLEASE HELP! POWER ADAPTER IS NOT CHARGING, THIS PROBLEM IS GETTING STUPID!

    Someone out there, if you care pleeasee help me,
    I have had this problem for a couple months now,
    It all started when my friends computer (same, black macbook) started saying (calculating until....) all the time he had his charger plugged in, and the LED was a very dim green, he used my charger to put power into his battery, I then put his charger into my computer and noticed that the battery life did not change when i was using my macbook, later on that day, I plugged my own charger into my laptop and it did not charge, it also said (calculating until....) and the LED was a dim green, now I have used all the power in my battery and when i remove my charger my computer turns off.
    I bought a new battery thinking it would resolve the problem, when I changed the batteries the new one had 39%, i plugged my charger in and it still failed to charge, not wanting to use a new battery i put my old battery back in.
    Then thinking it must be my charger, I got a working one off of a friend, i watched it charge perfectly in his brothers computer and when i plugged it into my computer, the LED was a very dim green, and it still failed to charge.
    I've tried all the apple, restart your NVRAM and SMC stuff. 2 of my friends have exactly the same problem and we're clueless. Does anyone know what is going on, this computer has my life on it, heelpp meeee pleeaaseeee!
    thank you
    harley

    WHAT?!?!?!? You spent FOURTEEN HUNDRED DOLLARS to get a new LB? Is this a typo? I don't think I even paid that much for my MB in the first place! Please tell me that's a typo!
    I'm in the same general position: MacBook over a year old (16 months), no AppleCare, sudden apperance of the miserable black X ("No batteries available", my A$$!)... I've tried it all: reset the PRAM and SMC, installed Battery Update... I ran all the tricks and treats I could find on the "official" AND not-so-official Apple boards. No go. Performs just fine on AC, but the battery is gonzo. HellOOOo! A LAPTOP is supposed to be PORTABLE!!
    I guess it's off for an hour-long ride to the closest Apple store for me. I'm hoping a Genius will take pity on my poor, un-warranty-havin' self and just swap my craptastic battery for a brand-spankin' new one -- AND I'm hoping that'll be the end of it! I get sick to my stomach at the idea of having to send my little baby off for service. I think I'd have to buy an external hard drive to back up all my photos and music and other files...
    I've already suffered through the Random Shutdown circle of heII. And, as I type, my wrists are a-resting on a decidedly PINK-tinged interior plastic... I hate that my precious little MacBook has had all these problems. I know buying a new unit might resolve this, but I don't want a big ol' MBP or another MB! I want THIS machine!!! (to work)
    Rant over.

  • Help! Power Hit During Sync

    I lost power as I was syncing my 5th generation Ipod from Windows XP. I can't run ITunes. When I click on the icon Windows tries to "configure" iTunes, then ends with the error, "Error writing to the file "C:\Program Files\iTunes\ITDetector.ocx. Verify that you have access to that directory. I checked the directory and its marked read only. I try to change it and it seems to work, but when I check the properties, the folder is still read only. When I click on the folder in Explorer I get a message that C: is not formatted! (C: is formatted, the PC is still working fine except for iTunes.) I tried to reinstall iTunes, but the installation stops with an "unexpected error" number 2330. Help! What do I do? How do I get my music back?

    sorry, i dont have an answer for you. however, i see your running xp, so am i , and i have an issue , u may can help me with. i got my ipod today, pluged it into the usb next to the express card bay on the right side of my laptop. a window appeared. said i had used the wrong usb port, to move to a faster port. however, my ipod was charging and a flashing, do not disconnect was flashing. so i dont know what to do. also, while downloading itunes, i got an error. will not work on windows 32. so , now i have removed itunes and must reinstall. how should i proceed with both issues, can u help me.....

  • Help! Power trouble- pavilion Dv4

    I'm a broke college student that saved up money for a good laptop. I bought a pavilion dv4 within the past few months. Just today, I had it on, working perfectly fine and left for work. When I came home, the power light was blinking but would not turn on no matter what I pushed. I plugged it in to charge it, assuming that was the problem. No luck. It makes a weird sound every two seconds and blinks. I researched it, and it said a lot about battery issues with that specific computer. I rarely shut it down. Did I overheat it or something? Please help, leaving for college in a far away state from home and need a working computer!

    Unplug the power cord, remove the battery, hold the power button down to 30 seconds, connect power cord Only, see if it will power up.

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