Let's start over......
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From: In the fast lane from LA to Tokyo...
My 2008 macbook has had a foot in the grave ever since the Lion Os came out from apple and it's HD was getting close to being maxed out so I ordered a new refurbished MacBook Pro 13.3" retina from the apple store on last Friday it should be here this Thursday 
....can't wait it's like an early Xmas ....
What sold me on it is it's read/write times....just amazing....512 gb 2.0 PCIe class 4 channel SSD hard drive plus I'll get to take advantage of the newest ac wifi
....can't wait it's like an early Xmas ....What sold me on it is it's read/write times....just amazing....512 gb 2.0 PCIe class 4 channel SSD hard drive plus I'll get to take advantage of the newest ac wifi
Last edited by 88racing; Oct 13, 2014 at 09:42 AM.
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I need some of that.
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Jim
Jim
Last edited by Bluejay; Oct 13, 2014 at 11:03 AM.
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Yeah -- my son and I were at a pizza place for dinner and they had the game on their TV so we got to see the last quarter of the game. I found myself audibly cheering for the Cowboys towards the end -- the first time I can ever remember that happening! Well, unless they're playing the Packers, of course.....
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Yeah -- my son and I were at a pizza place for dinner and they had the game on their TV so we got to see the last quarter of the game. I found myself audibly cheering for the Cowboys towards the end -- the first time I can ever remember that happening! Well, unless they're playing the Packers, of course.....
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Jim
Jim
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From: In the fast lane from LA to Tokyo...
This....
"Over the last few weeks, the first round of 802.11ac WiFi devices have started to emerge. In essence, 802.11ac is a supercharged version of 802.11n (the current WiFi standard that your smartphone and laptop probably use), offering link speeds ranging from 433 megabits-per-second (Mbps), all the way through to multiple gigabits per second. To achieve speeds that are dozens of times faster than 802.11n, 802.11ac works exclusively in the 5GHz band, uses a huge wad of bandwidth (80 or 160MHz), operates in up to eight spatial streams (MIMO), and a utilizes very fancy technology called beamforming. For more details on what 802.11ac is, and how it will eventually replace wired gigabit ethernet networking at home and in the office, read on.
How 802.11ac works
At its core, 802.11ac is essentially an updated version of 802.11n, which itself introduced some very exciting technologies that brought massive speed boosts over 802.11a and g. Whereas 802.11n had support for four spatial streams (4×4 MIMO) and a channel width of 40MHz, 802.11ac can use eight spatial streams and has channels up to 80MHz wide, which can be combined to make 160MHz channels. Even if everything else remained the same (it doesn’t), this means that 802.11n has 8x160MHz of spectral bandwidth to play with, vs. 4x40MHz — a huge difference that allows 802.11n to squeeze vast amounts of data across the airwaves.
To boost throughput further, 802.11ac also introduces 256-QAM modulation (up from 64-QAM in 802.11n), which basically squeezes 256 different signals over the same frequency by shifting/twisting each signal to a slightly different phase. In theory, this quadruples the spectral efficiency of 802.11ac over 802.11n. Spectral efficiency is a measure of how well a given wireless protocol/modulation/multiplexing technique uses the bandwidth available to it. In the 5GHz band, where channels are fairly wide (20MHz+), spectral efficiency isn’t so important; in the cellular bands, though, channels are often only 5MHz wide, which makes spectral efficiency very important.
802.11ac also introduces standardized beamforming (802.11n was non-standardized, which made interoperability an issue). Beamforming is essentially transmitting radio signals in such a way that they’re directed at a specific device. This can increase throughput (and make throughput more predictable), and also reduce power consumption. Beamforming can be done with smart antennae that physically move to track the device, or by modulating the amplitude and phase of the signals so that they destructively interfere with each other, leaving just a narrow, not-interfered beam. 802.11n uses this second method, which can be implemented by both routers and mobile devices.
Finally, 802.11ac is fully backwards compatible with 802.11n and 802.11g — so you can buy an 802.11ac router today, and it should work just fine with your older WiFi devices."
"Over the last few weeks, the first round of 802.11ac WiFi devices have started to emerge. In essence, 802.11ac is a supercharged version of 802.11n (the current WiFi standard that your smartphone and laptop probably use), offering link speeds ranging from 433 megabits-per-second (Mbps), all the way through to multiple gigabits per second. To achieve speeds that are dozens of times faster than 802.11n, 802.11ac works exclusively in the 5GHz band, uses a huge wad of bandwidth (80 or 160MHz), operates in up to eight spatial streams (MIMO), and a utilizes very fancy technology called beamforming. For more details on what 802.11ac is, and how it will eventually replace wired gigabit ethernet networking at home and in the office, read on.
How 802.11ac works
At its core, 802.11ac is essentially an updated version of 802.11n, which itself introduced some very exciting technologies that brought massive speed boosts over 802.11a and g. Whereas 802.11n had support for four spatial streams (4×4 MIMO) and a channel width of 40MHz, 802.11ac can use eight spatial streams and has channels up to 80MHz wide, which can be combined to make 160MHz channels. Even if everything else remained the same (it doesn’t), this means that 802.11n has 8x160MHz of spectral bandwidth to play with, vs. 4x40MHz — a huge difference that allows 802.11n to squeeze vast amounts of data across the airwaves.
To boost throughput further, 802.11ac also introduces 256-QAM modulation (up from 64-QAM in 802.11n), which basically squeezes 256 different signals over the same frequency by shifting/twisting each signal to a slightly different phase. In theory, this quadruples the spectral efficiency of 802.11ac over 802.11n. Spectral efficiency is a measure of how well a given wireless protocol/modulation/multiplexing technique uses the bandwidth available to it. In the 5GHz band, where channels are fairly wide (20MHz+), spectral efficiency isn’t so important; in the cellular bands, though, channels are often only 5MHz wide, which makes spectral efficiency very important.
802.11ac also introduces standardized beamforming (802.11n was non-standardized, which made interoperability an issue). Beamforming is essentially transmitting radio signals in such a way that they’re directed at a specific device. This can increase throughput (and make throughput more predictable), and also reduce power consumption. Beamforming can be done with smart antennae that physically move to track the device, or by modulating the amplitude and phase of the signals so that they destructively interfere with each other, leaving just a narrow, not-interfered beam. 802.11n uses this second method, which can be implemented by both routers and mobile devices.
Finally, 802.11ac is fully backwards compatible with 802.11n and 802.11g — so you can buy an 802.11ac router today, and it should work just fine with your older WiFi devices."
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This.... "Over the last few weeks, the first round of 802.11ac WiFi devices have started to emerge. In essence, 802.11ac is a supercharged version of 802.11n (the current WiFi standard that your smartphone and laptop probably use), offering link speeds ranging from 433 megabits-per-second (Mbps), all the way through to multiple gigabits per second. To achieve speeds that are dozens of times faster than 802.11n, 802.11ac works exclusively in the 5GHz band, uses a huge wad of bandwidth (80 or 160MHz), operates in up to eight spatial streams (MIMO), and a utilizes very fancy technology called beamforming. For more details on what 802.11ac is, and how it will eventually replace wired gigabit ethernet networking at home and in the office, read on. How 802.11ac works At its core, 802.11ac is essentially an updated version of 802.11n, which itself introduced some very exciting technologies that brought massive speed boosts over 802.11a and g. Whereas 802.11n had support for four spatial streams (4×4 MIMO) and a channel width of 40MHz, 802.11ac can use eight spatial streams and has channels up to 80MHz wide, which can be combined to make 160MHz channels. Even if everything else remained the same (it doesn’t), this means that 802.11n has 8x160MHz of spectral bandwidth to play with, vs. 4x40MHz — a huge difference that allows 802.11n to squeeze vast amounts of data across the airwaves. To boost throughput further, 802.11ac also introduces 256-QAM modulation (up from 64-QAM in 802.11n), which basically squeezes 256 different signals over the same frequency by shifting/twisting each signal to a slightly different phase. In theory, this quadruples the spectral efficiency of 802.11ac over 802.11n. Spectral efficiency is a measure of how well a given wireless protocol/modulation/multiplexing technique uses the bandwidth available to it. In the 5GHz band, where channels are fairly wide (20MHz+), spectral efficiency isn’t so important; in the cellular bands, though, channels are often only 5MHz wide, which makes spectral efficiency very important. 802.11ac also introduces standardized beamforming (802.11n was non-standardized, which made interoperability an issue). Beamforming is essentially transmitting radio signals in such a way that they’re directed at a specific device. This can increase throughput (and make throughput more predictable), and also reduce power consumption. Beamforming can be done with smart antennae that physically move to track the device, or by modulating the amplitude and phase of the signals so that they destructively interfere with each other, leaving just a narrow, not-interfered beam. 802.11n uses this second method, which can be implemented by both routers and mobile devices. Finally, 802.11ac is fully backwards compatible with 802.11n and 802.11g — so you can buy an 802.11ac router today, and it should work just fine with your older WiFi devices."
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Jim
Jim
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From: Houghton, MI & Chicagoland
This....
"Over the last few weeks, the first round of 802.11ac WiFi devices have started to emerge. In essence, 802.11ac is a supercharged version of 802.11n (the current WiFi standard that your smartphone and laptop probably use), offering link speeds ranging from 433 megabits-per-second (Mbps), all the way through to multiple gigabits per second. To achieve speeds that are dozens of times faster than 802.11n, 802.11ac works exclusively in the 5GHz band, uses a huge wad of bandwidth (80 or 160MHz), operates in up to eight spatial streams (MIMO), and a utilizes very fancy technology called beamforming. For more details on what 802.11ac is, and how it will eventually replace wired gigabit ethernet networking at home and in the office, read on.
How 802.11ac works
At its core, 802.11ac is essentially an updated version of 802.11n, which itself introduced some very exciting technologies that brought massive speed boosts over 802.11a and g. Whereas 802.11n had support for four spatial streams (4×4 MIMO) and a channel width of 40MHz, 802.11ac can use eight spatial streams and has channels up to 80MHz wide, which can be combined to make 160MHz channels. Even if everything else remained the same (it doesn’t), this means that 802.11n has 8x160MHz of spectral bandwidth to play with, vs. 4x40MHz — a huge difference that allows 802.11n to squeeze vast amounts of data across the airwaves.
To boost throughput further, 802.11ac also introduces 256-QAM modulation (up from 64-QAM in 802.11n), which basically squeezes 256 different signals over the same frequency by shifting/twisting each signal to a slightly different phase. In theory, this quadruples the spectral efficiency of 802.11ac over 802.11n. Spectral efficiency is a measure of how well a given wireless protocol/modulation/multiplexing technique uses the bandwidth available to it. In the 5GHz band, where channels are fairly wide (20MHz+), spectral efficiency isn’t so important; in the cellular bands, though, channels are often only 5MHz wide, which makes spectral efficiency very important.
802.11ac also introduces standardized beamforming (802.11n was non-standardized, which made interoperability an issue). Beamforming is essentially transmitting radio signals in such a way that they’re directed at a specific device. This can increase throughput (and make throughput more predictable), and also reduce power consumption. Beamforming can be done with smart antennae that physically move to track the device, or by modulating the amplitude and phase of the signals so that they destructively interfere with each other, leaving just a narrow, not-interfered beam. 802.11n uses this second method, which can be implemented by both routers and mobile devices.
Finally, 802.11ac is fully backwards compatible with 802.11n and 802.11g — so you can buy an 802.11ac router today, and it should work just fine with your older WiFi devices."
"Over the last few weeks, the first round of 802.11ac WiFi devices have started to emerge. In essence, 802.11ac is a supercharged version of 802.11n (the current WiFi standard that your smartphone and laptop probably use), offering link speeds ranging from 433 megabits-per-second (Mbps), all the way through to multiple gigabits per second. To achieve speeds that are dozens of times faster than 802.11n, 802.11ac works exclusively in the 5GHz band, uses a huge wad of bandwidth (80 or 160MHz), operates in up to eight spatial streams (MIMO), and a utilizes very fancy technology called beamforming. For more details on what 802.11ac is, and how it will eventually replace wired gigabit ethernet networking at home and in the office, read on.
How 802.11ac works
At its core, 802.11ac is essentially an updated version of 802.11n, which itself introduced some very exciting technologies that brought massive speed boosts over 802.11a and g. Whereas 802.11n had support for four spatial streams (4×4 MIMO) and a channel width of 40MHz, 802.11ac can use eight spatial streams and has channels up to 80MHz wide, which can be combined to make 160MHz channels. Even if everything else remained the same (it doesn’t), this means that 802.11n has 8x160MHz of spectral bandwidth to play with, vs. 4x40MHz — a huge difference that allows 802.11n to squeeze vast amounts of data across the airwaves.
To boost throughput further, 802.11ac also introduces 256-QAM modulation (up from 64-QAM in 802.11n), which basically squeezes 256 different signals over the same frequency by shifting/twisting each signal to a slightly different phase. In theory, this quadruples the spectral efficiency of 802.11ac over 802.11n. Spectral efficiency is a measure of how well a given wireless protocol/modulation/multiplexing technique uses the bandwidth available to it. In the 5GHz band, where channels are fairly wide (20MHz+), spectral efficiency isn’t so important; in the cellular bands, though, channels are often only 5MHz wide, which makes spectral efficiency very important.
802.11ac also introduces standardized beamforming (802.11n was non-standardized, which made interoperability an issue). Beamforming is essentially transmitting radio signals in such a way that they’re directed at a specific device. This can increase throughput (and make throughput more predictable), and also reduce power consumption. Beamforming can be done with smart antennae that physically move to track the device, or by modulating the amplitude and phase of the signals so that they destructively interfere with each other, leaving just a narrow, not-interfered beam. 802.11n uses this second method, which can be implemented by both routers and mobile devices.
Finally, 802.11ac is fully backwards compatible with 802.11n and 802.11g — so you can buy an 802.11ac router today, and it should work just fine with your older WiFi devices."
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From: In the fast lane from LA to Tokyo...
