Intel Turbo
2009
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 Intel Core i5 2500K Quad Core 33GHz 37Ghz in Turbo CPU LGA 1155 UNLOCKED $199.95 Time Remaining: 25d 21h 19m Buy It Now for only: $199.95 |
 Intel Core i7 2600K Sandy Bridge 34GHz 38GHz Turbo Boost LGA 1155 95W Quad $251.50 (26 Bids) Time Remaining: 2h 56m |
 Intel Core i7 3820 Sandy Bridge E 36GHz 38GHz Turbo Boost LGA 2011 130W $299.99 Time Remaining: 16d 17h 17m Buy It Now for only: $299.99 |
 Intel Turbo Cache Memory 4GB Full Size Mini PCI E Card Minicard $55.28 Time Remaining: 25d 21h 16m Buy It Now for only: $55.28 |
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 Intel Core i7 3770 Ivy Bridge 34GHz 39GHz Turbo LGA 1155 Quad Core Processor $317.00 Time Remaining: 24d 10h 3m Buy It Now for only: $317.00 |
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 Intel Core i5 2500K Sandy Bridge 33GHz 37GHz Turbo Boost LGA 1155 $100.00 (11 Bids) Time Remaining: 3d 21h 28m |
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 Intel Quad Core i7 2600K Sandy Bridge 34GHz 38GHz Turbo Boost LGA 1155 $269.99 Time Remaining: 25d 5h 32m Buy It Now for only: $269.99 |
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 Intel 1G 1GB 1024MB Cache Turbo Memory Card Mini PCI E Card D74338 301 $14.99 Time Remaining: 19d 9h 11m Buy It Now for only: $14.99 |
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 Intel Turbo Memory 1GB NAND Flash PCI Express Mini Card $14.95 Time Remaining: 12d 2h 45m Buy It Now for only: $14.95 |
 Intel Core i5 3570K Ivy Bridge 34GHz 38GHz Turbo LGA 1155 77W Quad Core NIB $166.50 (20 Bids) Time Remaining: 4d 2h 9m |
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 Intel 2GB Turbo Cache Memory Mini PCI E Card Full Size $23.80 Time Remaining: 25d 15h 44m Buy It Now for only: $23.80 |
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 Intel Core i7 720QM SLBLY Quad Core 16GHz turbo up to 28GHz PGA988 $90.00 Time Remaining: 18d 4h 27m Buy It Now for only: $90.00 |
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 Intel Quad Core i5 2500K Sandy Bridge 33GHz 37GHz Turbo Boost LGA 1155 95W $26.00 (5 Bids) Time Remaining: 6d 1h 38m |
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 Intel BX80621E52690 Xeon E5 2690 Turbo LGA2011 8Core 290MHz 800GT s Processor $2,173.46 Time Remaining: 28d 12h 5m Buy It Now for only: $2,173.46 |
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 Intel 1GB Turbo Cache Memory $34.97 Time Remaining: 22d 2h 54m Buy It Now for only: $34.97 |
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 Intel Core i5 3570K Ivy Bridge 34GHz 38GHz Turbo LGA 1155 77W Quad Core $238.99 Time Remaining: 6d 3h 44m Buy It Now for only: $238.99 |
 Intel 4G 4GB Turbo Memory Full Size Mini PCI E Card Fr Thinkpad IBM R61 T61 DELL $39.99 Time Remaining: 1d 14h 5m Buy It Now for only: $39.99 |
 Intel 4G 4GB Turbo Cache Memory Half Size Mini PCI E Card For Thinkpad T400 X200 $37.78 Time Remaining: 6d 7h 41m Buy It Now for only: $37.78 |
Intel Turbo
Intel Turbo Boost Hits Laptop Battery Life
Intel Turbo Boost hits laptop battery life
Laptop users with a new system based on Intel's latest Core i5 and Core i7 chips may need to take care of what applications they choose to run when using it on battery power.
The Core i5 and i7 processors introduced at the start of 2010 ship with a feature called Turbo Boost technology, designed to improve performance. It does this by ramping up the clock speed of the processor whenever the operating system calls for maximum performance, as explained by this excerpt from Intel's web site;
However, it turns out that that Turbo Boost does this even if the laptop is operating from battery power, which can dramatically shorten the battery life of the system, depending upon what it is being used for.
I found this out while testing some laptops for review that use the new Core i5 and Core i7 chips. In order to gauge toshiba pa 3250 battery life, I use a benchmark tool that keeps the system busy while simultaneously tracking how long the laptop has been running on battery power.
Few laptops live up to the vendor's claims on battery life (as a general rule of thumb, take the maker's quoted life and halve it), but one laptop in particular kept showing a battery score so much shorter than the specified figure that further investigation seemed appropriate.
Looking at the processor, I downloaded an application available from Intel, the Turbo Boost Monitor application, which gives a visual indication of when Turbo Boost is active.
Using this, it was easy to see that the benchmark - which uses OpenGL to display an animated graphic - was causing Turbo Boost to kick in and up the speed of the chip from 2.53GHz to 2.79GHz.
Unfortunately, it was staying at this speed all the time, which seems to be the reason why the laptop was only able to last for about 1 hour 30 minutes on battery power, when the specifications quoted a life of up to 8 hours.
Sadly, Turbo Boost is not configurable by the end user. Some laptops may allow you to turn it on or off in the Bios, but this was not the case with the evaluation laptop in question.
Quoting from Intel's web site again;
Of course, users should expect that running demanding applications will shorten battery life, but it is entirely possible that Turbo Boost will kick in if you are simply watching a DVD on your laptop, for example, and a battery life of 1 hour 30 minutes will not be long enough to see the entire movie in many cases.
So, while it may seem blindingly obvious that something like Turbo Boost would affect toshiba pa3399u-1bas battery life, that just leaves the question of why on Earth Intel decided this would be a great feature for a laptop chip, and why is there no way to control its behaviour, other than disabling it in the Bios?
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Intel Turbo Boost Animation - 2D version
