Gość: galilleo
IP: *.west.biz.rr.com
27.12.04, 02:14
SZCZESSLIWYCH SWIAT wszystkim inteligentnym ludziom, glabom i innym
uparciuchom ...., READER, user0001, malibu6, kalinowski, KELL99,
listonoszom maciejpoczta i wszystkim czesciom rowerow: pedalom i
mgregor......
Szczesliwego Nowego Roku wszystkim pieknym panion i eressea.
Wlasnie dostalem za darmo 2 letni GATEWAY z przepalonym zasilaczem 250
W.
Wszystko inne jak na medal, specyfikacja GATEWAY chociaz lepsza od DELL
to prawdziwe oszusztwo!
Tani cHINSKI zasilacz 250 W, Najtanszy RAM CL 3, HD 5400 RPM,
integrated AUDIO i VIDEO.
to doskonaly komputer do czytania Gazety FORUM i pisania eMail.
Wreszczie zaczyna sie konczyc dyskusja o zasilaczach ktore nie maja
mocy aby dostarczyc wystarcajaco duzo soku do komputera.
Oszczednosc tam gdzie nie warto i typowa glupota zawsze wiazaly sie z
instalowaniem za malych zasilaczy. Upor, brak wiedzy i "chec
zaoszczedzenia" rujnowala zycie wielu.
ATX12V 2.01 - The New Specification
More Performance: The New Power Supply Standard, ATX12V 2.01
It's one of the most important components in your computer.
Nothing will work without it, and yet it doesn't receive a fraction of the
attention it deserves. It's the power supply.
Why is the power supply so important?
The reason is simple: every other component in the PC depends on stable power
for trouble-free operation.
Even relatively slight deviations in voltage can lead to crashes and
component failures, a fact many users are still unaware of.
When a PC is unstable, the first things they suspect as the cause are overly-
aggressive memory timings, an overheated graphics card or an overclocked CPU.
Very rarely does the power supply unit come under scrutiny, despite its being
one of the most problem-prone components!
Reason enough to take a closer look at these critical parts.
New Connector
The most obvious physical change is the big new ATX plug, which now features
24 pins instead of the 20 of the previous version.
The four new pins feature +12V, +5V, +3.3V lines and an additional ground.
These render the older AUX connector superfluous, so the new standard no
longer includes one.
The rest of the leads remain unchanged, meaning that the two standards are
compatible to a limited extent. You need an adapter to be able to use the 24-
pin plug in older motherboards, and most power supply manufacturers include
one for that purpose. The reverse combination is also possible, as the 20-pin
plugs fit into the big connector too.
Efficiency was notched up considerably, with the new standard 70% at peak and
typical load, and 60% at lower loads. The recommended efficiency rates are as
high as 75%, 80% and 68% respectively for peak, typical and lower load. (A
typical load is defined as 50% and low capacity as 20% of overall output.)
While an efficiency value of 70% looks pretty high at first glance, consider
that it means the PSU itself consumes up 30% of the power, which it blows out
of the case as waste heat.
If the processor is not running at a high load, the percentage of unused
power is even greater; at 50% this means fully half of the input energy
dissipates as waste heat through the PSU.
In light of this, it makes sense for users to think about whether they really
need that huge 550 or 600 watt power supply - maybe you can get by with less
power.
It's also worth noting that the enormous amount of power used by today's CPUs
makes the efficiency of the PSU dwindle somewhat into insignificance.
With a typical PC configuration using a Q-Technologies 460 W power unit, we
measured the power consumption of the entire system at 195.8 watts, while the
supply took a total of 247 watts.
This works out to an efficiency of 79.3%, so the power unit is putting out
some decent numbers here.
Still, even here, over 50 watts still leave the unit as heat rather than
contributing to computing. If the power supply has an even lower efficiency
rating - no rare occurrence, by the way - you're sure to see the effect of
the much higher power output on your energy bill.
Simply put, an efficient PSU may cost more initially but can save you cold,
hard cash, especially if the computer is left running all the time.
www.tomshardware.com/howto/20041223/atx12v-24pin-03.html
www.tomshardware.com/howto/20041223/index.html
