A correspondent does the maths implicit in your article... Yes, charging my phone's 1Ah battery in 9 seconds would require a current of 400A. But that's only at 3.7V, so the amount of power involved is about 1.5kW, half of an electric kettle and well within the maximum of a regular 13A/240V plug. Surprisingly high currents are provided in domestic environments -- your PC power supply feeds its CPU chip with over 90A of current. Nine seconds: hardly. Three minutes? there's no obvious power supply reason why not.
A MIPS CPU is a lot simpler than an x86, which means less transistors in the CPU's heart. But almost all the transistors on a CPU chip are cache and interface anyway, so it won't ever make up for the huge economies of scale in the x86 clone market. But while you can't buy a chinese x86 yet (for legal and political reasons, you can get the chinese MIPS.
It will never run Vista, so you won't even be tempted. That's got to be a plus, too...
A MIPS instruction set (RISC) CPU is a lot simpler than an x86, which means less transistors in the CPU's heart. But almost all the transistors on a CPU chip are cache and interface anyway, so it won't ever make up for the huge economies of scale in the x86 clone market. But while you can't buy a chinese x86 yet (for legal and political reasons, you can get the chinese RISC.
It will never run Vista, so you won't even be tempted. That's got to be a plus, too...
Fast CPUs need their interconnect to provide the data they need, fast (they're probably stalled waiting for that data). While too-low bandwidth gets in the way, the critical factor is more often the time until the first datum you asked for arrives ("latency"). Prof Roger Needham used to say that "bandwidth can be made by man, but God makes latency".
Nobody ever quotes the minimum latency which is practically achievable with their interconnect, because as the interconnects get more amazing, it generally gets worse... So this bandwidth claim, like almost all other such, is irrelevant.
BTW, optical enthusiasts should probably try to convince us that four electric/optical transitions in their favourite path doesn't add delay.
If it was just a trademark, "Scrabulous" could just change its name (assuming it's plausible that it confuses -- it seems pretty distinct to me).
Any patent (there was a 1956 US patent relevant to the scrabble board) expired long ago.
So what's left is copyright. The inventor of scrabble died only in 1993 and -- in the UK at any rate -- I believe this is treated like an artistic work, so that's 70 years after the death of the author. But apparently courts are inclined to limit the copyright to fairly precise reproduction of artwork... this could run on.
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5 posts • joined Thursday 17th January 2008 20:08 GMT
Battery charging at home
A correspondent does the maths implicit in your article... Yes, charging my phone's 1Ah battery in 9 seconds would require a current of 400A. But that's only at 3.7V, so the amount of power involved is about 1.5kW, half of an electric kettle and well within the maximum of a regular 13A/240V plug. Surprisingly high currents are provided in domestic environments -- your PC power supply feeds its CPU chip with over 90A of current. Nine seconds: hardly. Three minutes? there's no obvious power supply reason why not.
Why choose
A MIPS CPU is a lot simpler than an x86, which means less transistors in the CPU's heart. But almost all the transistors on a CPU chip are cache and interface anyway, so it won't ever make up for the huge economies of scale in the x86 clone market. But while you can't buy a chinese x86 yet (for legal and political reasons, you can get the chinese MIPS.
It will never run Vista, so you won't even be tempted. That's got to be a plus, too...
Why choose
A MIPS instruction set (RISC) CPU is a lot simpler than an x86, which means less transistors in the CPU's heart. But almost all the transistors on a CPU chip are cache and interface anyway, so it won't ever make up for the huge economies of scale in the x86 clone market. But while you can't buy a chinese x86 yet (for legal and political reasons, you can get the chinese RISC.
It will never run Vista, so you won't even be tempted. That's got to be a plus, too...
CPUs need low latency, not high bandwidth
Fast CPUs need their interconnect to provide the data they need, fast (they're probably stalled waiting for that data). While too-low bandwidth gets in the way, the critical factor is more often the time until the first datum you asked for arrives ("latency"). Prof Roger Needham used to say that "bandwidth can be made by man, but God makes latency".
Nobody ever quotes the minimum latency which is practically achievable with their interconnect, because as the interconnects get more amazing, it generally gets worse... So this bandwidth claim, like almost all other such, is irrelevant.
BTW, optical enthusiasts should probably try to convince us that four electric/optical transitions in their favourite path doesn't add delay.
Copyright on scrabble
If it was just a trademark, "Scrabulous" could just change its name (assuming it's plausible that it confuses -- it seems pretty distinct to me).
Any patent (there was a 1956 US patent relevant to the scrabble board) expired long ago.
So what's left is copyright. The inventor of scrabble died only in 1993 and -- in the UK at any rate -- I believe this is treated like an artistic work, so that's 70 years after the death of the author. But apparently courts are inclined to limit the copyright to fairly precise reproduction of artwork... this could run on.