Slashdot Mirror
Intel Claims Haswell Architecture Offers 50% Longer Battery Life vs. Ivy Bridge
MojoKid writes "As with any major CPU microarchitecture launch, one can expect the usual 10~15% performance gains, but Intel apparently has put its efficiency focus into overdrive. Haswell should provide 2x the graphics performance, and it's designed to be as power efficient as possible. In addition, the company has further gone on to state that Haswell should enable a 50% battery-life increase over last year's Ivy Bridge. There are a couple of reasons why Haswell is so energy-efficient versus the previous generation, but the major reason is moving the CPU voltage regulator off of the motherboard and into the CPU package, creating a Fully Integrated Voltage Regulator, or FIVR. This is a far more efficient design and with the use of 'enhanced' tri-gate transistors, current leakage has been reduced by about 2x — 3x versus Ivy Bridge."
I'd be interested to know what phone you have, that uses an Intel Ivy Bridge server/desktop/laptop processor.
"National Security is the chief cause of national insecurity." - Celine's First Law
Is this seriously 50% increase in battery life? Or just 50% reduction in power usage by CPU? The article wasn't clear on this. I'm assuming the power usage thing.
Depends on the screen you have, I would guess. https://www.google.com/search?q=laptop+screen+wattage&aq=f&oq=laptop+screen+wattage If you look at the first link there, you'll see that the LCD screen takes up on the order of 5W of power at full brightness. The same paper says that the power usage roughly doubles when you start blasting the CPU. If you use your laptop like I do (I'm in an engineering program at college), that's some nice savings there if they can trim the CPU usage.
Yes screen technology is important.... Pixel Qi technology seems to be ignored and should not
Especially on laptops that mate well with a docking station for "work".
A big quality display at the office is a good thing. Especially on that has been rotated to be tall. The ability to have a very low power transmissive/ reflective display while mobile and a serious display at a desk at work is under served.
Docking station tech is lame at best. First the battery charging logic is flawed. The charger should disconnect from the battery once it is charged. It should test the battery once an hour thereafter and decide what to do. I cannot tell you how many batteries I have had die from long term over charging and lack of correct dynamics in use.
A docking station should have cooling designed to keep the battery as well as the CPU/logic cool. Most obstruct air flow and do neither well.
Truth is stranger than fiction, but it is because Fiction is obliged to stick to possibilities; Truth isn't. Mark Twain.
Really? Amdahl's law is:
Tn = a + (1-a)/N
Where Tn = Time with N cores
N = Number of Cores
a (should be alpha) = fraction of instructions in serial code.
What you are talking about is:
Bp = (1-((Pt - Pc)/pt))*100
While Amdahl is significant to the computer science world, are you claiming he invented percentages?
I browse on +1 so AC's need not respond, I won't see it.