Want to read Slashdot from your mobile device? Point it at m.slashdot.org and keep reading!


Forgot your password?
DEAL: For $25 - Add A Second Phone Number To Your Smartphone for life! Use promo code SLASHDOT25. Also, Slashdot's Facebook page has a chat bot now. Message it for stories and more. Check out the new SourceForge HTML5 internet speed test! ×

Comment Re: Quad Sockets: (Score 1) 138

Knock yourself out:

Got one of their dual Opteron 16-core (2.8ghz) machines right now, the performance is ~20% better than our dual 8-core (16 thread) Intel machine for our workloads. I'm dying to grab a 64 core machine that can handle 128 threads. 2x that? It would be awesome if we could afford it.


Comment Re:Fantastic, really. (Score 1) 306

My wife's car's got ~210k on it, 29mpg lifetime average according to the dash. The average cost of gas over that life has been around $2.75. That's $19914.

Our other car is an extreme example. Honda Insight, 185k on the clock, 64.5 mpg lifetime average on the dash. 2.75 average cost of gas = 7888. Still about twice that $4k number GP threw out.

Comment Re:Cheaper? (Score 1) 382

You're never going to get anywhere remotely near wholesale prices, honestly.

I would just buy a whole wrecked Leaf, strip the pack out and sell the rest for scrap. You'll get OEM quality batteries and the price will be low, and you'll get 24kwh of batteries.

Looking on car-part, there's a Leaf pack from a wrecked 2014 for $2500 right now. That's $104/kwh.

Comment Re:trying (Score 1) 491

"...doesn't include college-dorm moves prevalent with 18- to 24-year-olds..."
So it excludes what is probably the most common type of move people in this generation make. And, I mean look at the percentage of millennials who went to/are in college vs older generations. This doesn't seem particularly valid.

Comment Re:And the freezing temperature is...? (Score 1) 218

I put a temperature datalogger under some wadded up white t-shirts in the back seat of my car with the windows rolled up and left it in the parking lot at my work all day each day for a week (usually I crack the windows and put a reflector on the windshield).

The highest temp I saw was 172F (~78C).

Comment Re:Big battery will put a stop to this (Score 1) 218

Well, and charge/discharge efficiency.

NiFe batteries have a pretty atrocious efficiency: ~65% for charge, ~80% for discharge, or approximately 52% round-trip. Although like all batteries, the efficiency varies depending on the SOC. For instance, avoiding the top 25% of charge would bring this up some.

IIRC lead acid numbers vary quite a bit, but a charge/discharge regimen that won't eat your batteries in short order is around 72%, round trip.

Li-ion battery types (and there are lots) can be over 90% round trip.

This is an extremely important bit of data for grid energy storage that I wish had been included.

Slashdot Top Deals

Your code should be more efficient!