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Comment: Thanks (Score 1) 125

by grimJester (#47954551) Attached to: NVIDIA Launches Maxwell-Based GeForce GTX 980 and GeForce GTX 970 GPUs

The newly launched Nvidia GTX 980 and 970 support HDMI 2.0 and DP, so these can run 4k@60hz with TV and monitors that support it, I think some Samsung and LG TVs advertise HDMI 2.0 and DP.

Ok, so it's a somewhat reasonable idea to get 60Hz on a TV without spending the cash for a 4k monitor.

here are a couple threads where I found most of the information before I bought it:

Thanks, I'll have a look at these.

Comment: Looking for info on running 4k screens (Score 2) 125

by grimJester (#47954075) Attached to: NVIDIA Launches Maxwell-Based GeForce GTX 980 and GeForce GTX 970 GPUs
I'm thinking about upgrading my monitor to 4k but I'm a bit confused about the current situation with both connectors and screens. How is running 4k@30Hz for normal desktop purposes, with no 3d gaming? Are the cheap 4k 39-40" TVs completely fine for those purposes? What connector(s) do I need from my GPU? How long would I have to wait for GPUs and TVs/monitors to support 4k@60Hz (HDMI 2.0? Displayport x.y?). Can I connect more than one screen to a single GPU card if I want 4k?

This might be a candidate for Ask Slashdot, I guess

Comment: Might use batteries too (Score 1) 260

by grimJester (#47853757) Attached to: Tesla Plans To Power Its Gigafactory With Renewables Alone
Obviously a battery factory will have some amount of batteries on site. The 2400 MWh/day figure from the article would be around 30 000 full Model S battery packs, so going completely off-grid using whatever batteries they have lying around is unfeasible. Anyway, no point in not using them, right?

Comment: Don't batteries just compete against gas turbines? (Score 1) 245

by grimJester (#47802251) Attached to: Power Grids: The Huge Battery Market You Never Knew Existed
Can't the wind farms just use gas turbines instead of batteries as long as those are cheaper? I'd assume batteries will be used if/when they become the cheapest way to handle the balancing.

Some day soon, in some areas, there will be enough solar to handle most power needs at peak insolation. When that happens, we'll have significantly cheaper grid power in the day than during the night. Then we'll see how much of the balancing water can do and if batteries can outcompete gas for the rest.

Comment: Fresh water less dense, more volume per weight (Score 1) 302

by grimJester (#47800723) Attached to: Study: Antarctic Sea-Level Rising Faster Than Global Rate
If you have a source of melting fresh water, water around it will be slightly higher as long as the melting continues, as it takes time for the meltoff to mix with the rest of the ocean. It's just a 2mm difference over maybe a thousand km of sea (which is why the intuitive "should immediately even out" idea doesn't work) so I doubt you could make the same effect visible in a bathtub.

Comment: Don't use Peter Woit as a authority... (Score 1) 259

by grimJester (#47607707) Attached to: The Man Who Invented the 26th Dimension
Woit has written a book called "Not even wrong" about string theory and how it's not science in his opinion. He actively blogs about string theory hype. He's not a string theorist and although he does have a PhD in physics he's not published anything scientific in decades. He teaches math and writes anti-string rants as a hobby.

Comment: LEP was 209 GeV (Score 2) 219

by grimJester (#47515033) Attached to: China Plans Particle Colliders That Would Dwarf CERN's LHC
This is a pretty small upgrade from the LEP that used to be in the current LCH tunnel. That went up to 209 GeV and ruled out Higgs masses up to 115 GeV. The Higgs is around 125 Gev, or 9% higher, and the energy of this is supposed to be 240 GeV, or 15% higher.

That makes me wonder if the planned energy is enough for a useful Higgs factory. The ILC is supposed to do 500 GeV and would work well as a Higgs factory. That proposal would be more than twice as expensive though.

It's of course possible the article has it wrong and it's really 240 GeV per beam, adding up to 480.

The Universe is populated by stable things. -- Richard Dawkins