Posts by Chris S

1) Message boards : Number crunching : My Computer Builds And Other Projects (Message 1976426)
Posted 1 hour ago by Profile Chris S Crowdfunding Project Donor*Special Project $75 donor
Post:
Indeed so Rob.

To continue our previous conversation .........

I just checked my twin 960 card machine and it has 12Gb of 10700 memory. With 95% card utilisation the memory load is just 28%. Also the twin CPU's are only Xeon X5650's. Another machine runs a single 970 card with 8Gb ram and has only 31% memory use.

So I reckon that CPU's and memory make little difference to RAC it's all down to the computing power of the GPU card as far as I can see. Yet some guys go as far as buying motherboards that allow you to overclock both the CPU's and the memory. The extra RAC that gives is minimal, and stresses everything more than what it was designed for.

So a 1070Ti, or those 2060's are sure looking good for pricing.

I had a quick look.

1070Ti 8gb new £375 £300 s/h ebay
2060 6 Gb new £325

Way out of my price range for a GPU. That sort of money could by me a new washing machine!
2) Message boards : Number crunching : My Computer Builds And Other Projects (Message 1976412)
Posted 4 hours ago by Profile Chris S Crowdfunding Project Donor*Special Project $75 donor
Post:
However, one thing that is not clear from those graphs is the "kWhr/clock hr" - which is the actual cost of running any particular GPU

I just feel that if the cost per hour of running a card or pair of cards is of a sufficient concern, then one should query whether the cost of buying the card or cards could be justified in the first place, and the cost of the computer to fit them in. If I was short of money the very first thing I'd do is turn my rigs off. They are just a hobby nothing more, day to day living to a reasonable standard is much more important yo me.

Over Xmas this year I spent more than I intended to and had to dip into my savings a/c to pay some bills. My first aim is to put money back into that savings a/c, most certainly none will be spent on computers in the foreseeable future. I can't justify it just because it would be nice to have, and I certainly wouldn't get into debt with interest over it.

But it is interesting to compare cards from 5 years ago to today. Modern 1000 series cards can use up to half the power of the older 700-900 series ones and sometimes 5 times more output in the same range. That is modern technology for you. But then you have to factor in that more powerful cards need more powerful PSU's etc. It is the GPU cards that do the work, the CPU and the memory are of no real significance to RAC unless you like numbers on a piece of paper.
3) Message boards : Number crunching : My Computer Builds And Other Projects (Message 1976401)
Posted 6 hours ago by Profile Chris S Crowdfunding Project Donor*Special Project $75 donor
Post:
take a look at Shaggie's "GPU Flops theory vs reality" thread where he posts comparative graphs for the vast majority GPUs based on the actual performance out in the wilds of SETI rather than under artificial bench testing when it comes to credit per hour, and a long way ahead in terms of credit per kWHour.

Quite amazing how high up the 750Ti is in the kW hour chart. Quite an old card now but bang for buck was very good in it's day. Quite happy with mine, I have no intention to replace them.
4) Message boards : Science (non-SETI) : No lunar eclipse viewing for me tonite (Message 1976399)
Posted 6 hours ago by Profile Chris S Crowdfunding Project Donor*Special Project $75 donor
Post:
Party pooper here: I heard an expert comment that the reddish color was caused by Earth's atmospheric contaminants, and that to his knowledge no studies used this phenomena's metrics to study how it correlated with other standard atmospheric studies. Makes sense since we know violently beautiful sunsets are "improved" by the density of air pollutants... =:/

Another realist here:

Mankind's* contribution to global warming is to produce a barrier of contaminants and pollutants that prevent natural heat from escaping onto space. Heat output is negligible.

*mankind is a generic term for both men and women. Men & Women are as much to blame as each other in different ways.

GHG emissions
5) Message boards : Science (non-SETI) : CERN (Message 1976262)
Posted 22 hours ago by Profile Chris S Crowdfunding Project Donor*Special Project $75 donor
Post:
If in fact we are warming, and Mankind is contributing to the warming , then there is nothing that we can do to have any impact short of total annihilation.

At the present moment we are in an interglacial period, where temperatures are likely to increase naturally to where they were some 5000-10,000 years ago. Mankind is helping that to happen by a small extent by producing greenhouse gases through industrialisation. Spending billion of dollars won't stop it happening, it is a natural planet cycle.

Climate change

In terms of total science spend the cost of the new FCC is small in comparison, but the man in the street doesn't see it that way. and it's the man in the street that votes governments in and out, as we might be finding out shortly in the UK!

As I said earlier I would expect readers and contributors to this thread to be in favour of the FCC for the reasons previously given.
6) Message boards : Number crunching : PSU Design (Message 1976234)
Posted 23 hours ago by Profile Chris S Crowdfunding Project Donor*Special Project $75 donor
Post:
FWIW, my SFF HP desktop with a 240W PSU is happily running a GTX1050ti. I have a power meter on each of my PCs and this one at full crunch is drawing less than 110W from the wall. No drama there ...

However, your small form factor desktop PC was likely designed and specced for office 9-5 use. The PSU maybe only about 50% loaded, but how stressed is it running 24/7 and what was its original design life? And how much are you shortening it?

as an example the gold PSU uses 7% more electric power to supply the same 500W than the platinum, that difference makes you paid an additional of 35 W in your electric bill. Now multiply this for your electric power rate (kw/hr) and you will see how much you will going to paid more at the end of the month. Using an electric rate of 0.20 US$ per kw/hr that gives about 5$ per month if you run 24/7.

With the greatest of respect I would suggest that if just $5 (£3.88) per month makes a significant difference to ones budget, then I would query whether that person can really afford to run computers in the first place.

So besides the environmental problem (more heat generated bad for global warming)

I think the heat output generated by a home computer would be so infinitesimal as to make no difference. Global warming comes mainly from Burning fossil fuels which release CO2 pollution into the atmosphere. Also deforestation because they absorb carbon dioxide from the air. Also large industrial complexes belching out hazardous chemicals etc. Pure heat output hardly comes into it.

The only reason I would go from a bronze to a platinum PSU is likely the general quality of build and the longer life before it fails.

One thing that does surprise me is how many folks trip up when looking at 110 vs 230 v mains - a Watt is a Watt, so the power (Watts) drawn from the wall should be more or less the same for a given load, but the current drawn from a 110v supply will be about double that from 230v supply.

If I boil a standard 3Kw electric kettle for a cup of tea, at 240V that is a current of about 12.5 amps through a standard 13A plug and wall socket. At 110V that would be 27amps. It seems that the USA original distribution system was 110V DC when they changed to AC they kept the voltage the same.

The UK uses 110v building site transformers which are centre tapped, this means that they are essentially dual phase, meaning that 110v is actually reduced to 2 x 55v. This lower voltage and current is much safer to use, and it is unlikely to have the punch to cause you problems if you accidentally stepped on a live wire in your safety boots.

Plugging in say three top end computers in a typical American house each with say a 750W load draw, will equal 20A , not good on a 15A circuit.
7) Message boards : Science (non-SETI) : No lunar eclipse viewing for me tonite (Message 1976201)
Posted 1 day ago by Profile Chris S Crowdfunding Project Donor*Special Project $75 donor
Post:
it's gone up to 1C.
Humidity: 94%
Wind: 2 mph

There is a bit of a chill factor to make it feel zero.
8) Message boards : Number crunching : PSU Design (Message 1976200)
Posted 1 day ago by Profile Chris S Crowdfunding Project Donor*Special Project $75 donor
Post:
Its a fact that all "consumer" grade PSUs are pretty inefficient over a wide range of loads and hit their marketing badge efficiency over a narrow range (despite claims to the contrary in very many adverts).


I suspect that a lot of us that are home hobbyists tend to do what I do, which is if I have a PC that takes 350W to operate I would go +50% and get a 550W one. If it took 500W to operate I would get a 750W one etc.

Sure is marketing, most of the users not even know the real difference from Bronze, Gold, Platinum or Titanium PSU's

I'll quite happily admit to that! I guess the more up market ones are more efficient and give out less heat for the same load.

But then again those people that can afford to buy and run machines that need 1000W + PSU's won't worry about the cost of electricity or the heat output, they can afford not to. I'm on a pension, my top machine runs 2 x GTX960 cards, pretty low end stuff these days. But I don't need anything more than that, and I couldn't afford to buy one and run it anyway.

But going back to my original question, it seems that the answer is that single rail PSU's are better at dealing with high loads, and they are mostly in the top PSU ranges which also have more efficient power outputs as well.
9) Message boards : Science (non-SETI) : Space Exploration News (Message 1976191)
Posted 1 day ago by Profile Chris S Crowdfunding Project Donor*Special Project $75 donor
Post:
The far side of the Moon is the hemisphere of the Moon that always faces away from Earth. Both sides of the Moon experience two weeks of sunlight followed by two weeks of night; the far side is sometimes called the "dark side of the Moon", meaning unseen rather than lacking light.

Moon light
10) Message boards : Science (non-SETI) : No lunar eclipse viewing for me tonite (Message 1976190)
Posted 1 day ago by Profile Chris S Crowdfunding Project Donor*Special Project $75 donor
Post:
Saw it at 6am this morning through a hazy sky of thin cloud cover as it dipped below the western horizon.

At -2C it was ----ing cold! Still -1C now.
11) Message boards : Science (non-SETI) : CERN (Message 1976124)
Posted 1 day ago by Profile Chris S Crowdfunding Project Donor*Special Project $75 donor
Post:
a Linac is the first part of a circular accelerator like LHC

Thank you for that information, I didn't know that. I do now.
12) Message boards : Science (non-SETI) : No lunar eclipse viewing for me tonite (Message 1976080)
Posted 1 day ago by Profile Chris S Crowdfunding Project Donor*Special Project $75 donor
Post:
Dead clear sky in South London, very large moon already visible over the roof tops to the East.
13) Message boards : Science (non-SETI) : CERN (Message 1976059)
Posted 1 day ago by Profile Chris S Crowdfunding Project Donor*Special Project $75 donor
Post:
Britains CND group started in 1957, unfortunately 62 years later they haven't achieved their aim and never will do.

Beware the Manchester Guardian. The Guardian group of newspapers are well known for extreme left wing views. In fact it is rumoured that some shops won't even sell you a copy unless you have a goatee beard, wear open toed sandals, and eat muesli for breakfast.

The National Audit Office estimates the additional cost to consumers (above the estimated market price of electricity) under the "strike price" will be £50 billion, which 'will continue to vary as the outlook for wholesale market prices shifts'. Financing of the project is still to be finalised, but the construction costs of £20 Billion will be paid for by the mainly state-owned EDF of France and state-owned CGN of China.[
14) Message boards : SETI@home Science : Oumuamua (Message 1976044)
Posted 2 days ago by Profile Chris S Crowdfunding Project Donor*Special Project $75 donor
Post:
Well, you've pretty much covered all the bases for yourself there haven't you :-)

To be realistic (not negative), it has come and gone. We don't know what it was and we never will do. So any one persons opinion is as good as anyone else's. None can be proved nor disproved. People can bang on about it for the next 10 years if they want to (and some probably will).

Dr Loeb is still pushing his lightsail agenda, and why not. When looked at in a particular way the data suggests the object was either really elongated (up to 50:1 ratio) or a thin pancake (exactly what he imagines a lightsail would look like).

the topic then goes viral on social media. This makes it easier for him to apply for follow-up funding. For him, any publicity is good publicity - it's a win-win situation.

We all know why Loeb is pushing the lightsail angle. He is Chairman of the Breakthrough Starshot Advisory Committee. I don't know if it is a paid position or an honorary one. He is biased, it is as simple as that, and behaving totally unprofessionally.

Breakthrough Starshot is a research and engineering project by the Breakthrough Initiatives to develop a proof-of-concept fleet of light sail spacecraft named StarChip, to be capable of making the journey to the Alpha Centauri star system 4.37 light-years away.

Breakthrough Starshot
15) Message boards : News : Little bits of previously unfinished data. (Message 1976040)
Posted 2 days ago by Profile Chris S Crowdfunding Project Donor*Special Project $75 donor
Post:
Bruce Allen of Einstein was going to let DA run Nebula on the Atlas cluster at Hanover. In addition of course to his own work. It is on record somewhere.

I hope something happens soon, we have nearly 20 years of data we simply back up each week and do nothing with. It needs running through with modern stronger algorithms which is what Nebula is supposed to do at some point.
16) Message boards : Number crunching : PSU Design (Message 1976030)
Posted 2 days ago by Profile Chris S Crowdfunding Project Donor*Special Project $75 donor
Post:
Ah! That would be why all my PSU's are multi rail then! If I was ever in the market for a 1000W PSU I would likely look at Corsair, another good solid make.

But I can't imagine that I would ever have the class of GPU's that would warrant it, or the machine to host them.
17) Message boards : Number crunching : PSU Design (Message 1976025)
Posted 2 days ago by Profile Chris S Crowdfunding Project Donor*Special Project $75 donor
Post:
I'm really not sure why people go for Platinum rated PSU's, what is so special about them? All mine are 80% bronze.

My favourite manufacturer is Antec as I have found them reliable in the past. I have a couple of Truepower 550W running for 5 years 24/7. if I was in the market for a low or medium PSU I would go for these two. I have no idea whether they are single or multi rail.

550W

750W
18) Message boards : Science (non-SETI) : CERN (Message 1976021)
Posted 2 days ago by Profile Chris S Crowdfunding Project Donor*Special Project $75 donor
Post:
In my view there are two kinds of areas of research.

Case 1 could be that a team set out to find a cure for a particular type of cancer. They know what their goal is and have to find a way to get the result that they want. It may very well be that they will have to invent new methods of doing things and make innovative research. They might not know what is going to achieve their aim, but they do know what they want.

In Case 2, the FCC is being proposed to be built upon the basis that they haven't a clue what they might find if anything. Although previous experience makes it reasonable to assume that there are more exotic particles to be found. Even if they do find something after a few years, they don't know what benefit it will achieve, or if it slots into this standard model of physics.

When we are talking billions of tax payers money, it is not hard to see why case 1 gets funded, and case 2 becomes controversial. In any research at the leading edge of technology, there will likely be unexpected spin offs, but you can't quantify that at the beginning.

You can't compare the cost of scientific research against Defence spending, they are quite different areas. If you don't carry out research you don't learn and improve. If you don't consolidate and modernise a country's defence than it could be invaded and taken over by another country. Both approaches by a government benefit the population, but in different ways.

Particle accelerators are basically atom smashers which produce even smaller particles from high speed collisions. The LINAC is a mini cousin of the LHC. It uses the same technology but it produces X-rays not exotic particles.

mini-particle-accelerators
19) Message boards : Number crunching : PSU Design (Message 1975939)
Posted 2 days ago by Profile Chris S Crowdfunding Project Donor*Special Project $75 donor
Post:
Lots more info to digest :-) Single rail is coming out on top by a long way.
20) Message boards : SETI@home Science : Oumuamua (Message 1975928)
Posted 2 days ago by Profile Chris S Crowdfunding Project Donor*Special Project $75 donor
Post:
I basically agree William but if there were only 5 and there have been no more, it is more than likely that it was a once off, however tantalising.


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