NFOHump.com :: View topic - Something going on with my power supply

Page 2 of 2

Goto page Previous 1, 2

Janz

Posts: 14001

Posted: Fri, 11th Sep 2015 12:33 Post subject:	Quick Quote Quote

theoretical yes, but that is with clean labor conditions. in normal usage the power dissipation is different

tonizito
VIP Member

Posts: 51456
Location: Portugal, the shithole of Europe.

Posted: Fri, 11th Sep 2015 12:46 Post subject:

Janz wrote:

theoretical yes, but that is with clean labor conditions. in normal usage the power dissipation is different

How is that?

boundle (thoughts on cracking AITD) wrote:

i guess thouth if without a legit key the installation was rolling back we are all fucking then

Profile
PM

Janz

Posts: 14001

Posted: Fri, 11th Sep 2015 12:51 Post subject:	Quick Quote Quote

those measurements were made as i said in clean labor conditions -> constant 23°C, a special humidity etc. those values are not even realistic for normal usage at home. alone the fact that the psu is build into a case destroys the labor values. thats cause the electronic parts work and react different under different conditions that makes the 50% not accurate, think the normal average was about 75% or so

tonizito
VIP Member

Posts: 51456
Location: Portugal, the shithole of Europe.

Posted: Fri, 11th Sep 2015 15:11 Post subject:

Janz wrote:

those measurements were made as i said in clean labor conditions -> constant 23°C, a special humidity etc. those values are not even realistic for normal usage at home. alone the fact that the psu is build into a case destroys the labor values. thats cause the electronic parts work and react different under different conditions

that makes the 50% not accurate, think the normal average was about 75% or so

PSU reviews at hardocp, kitguru, johnnyguru in "torture test" conditions show the same behaviour as in that curve:

http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story2&reid=225
http://www.kitguru.net/components/power-supplies/zardon/xfx-pro-series-450w-and-550w-power-supply-review/7/
http://www.hardocp.com/article/2015/07/09/seasonic_snow_silent_750w_power_supply_review/6#.VfLUEtEVhdg

boundle (thoughts on cracking AITD) wrote:

i guess thouth if without a legit key the installation was rolling back we are all fucking then

Profile
PM

Drowning_witch

Posts: 10818
Location: Strawberry fields

Posted: Fri, 11th Sep 2015 16:02 Post subject:

tonizito wrote:

Stormwolf wrote:

Corsair TX 650

Yep, that was the one Laughing

Mine was a seasonic design but not even that mattered after 7-8 years, and luckily it didn't take anything else with it.

I got this one as a replacement:
http://xfxforce.com/en-us/products/ts-bronze-series-full-wired/ts-series-550w-psu-p1-550s-xxb9
Another seasonic platform, but now a 550W one

mY tx650 is still going strong and it was bought in 2008 Laughing

I guess now that I jinxed it, PSU fire soon? Razz

Profile
PM

escalibur

Posts: 12167

Posted: Fri, 11th Sep 2015 16:36 Post subject:

Janz wrote:

Quote:

Choosing "overpowered" PSU is much better solution because the electonics inside can handle more power than what's PSU is using with your machine

möööööööööööööp, wrong! sure you shouldnt pick a 400w psu if you might need about 390w under load. BUT getting a 750w in that case is just stupid, cause its more pricey, and it will suck more power cause its loaded too low with 400w. a 500w psu would work much more power efficient

Wrong! Higher wattage PSU won't definitely use more power then what is needed. (unless we are chopping hair here) As you know PSUs are not working on 100% constant load.

Lets not forget that we are not discussing 100% efficiency here. Probably optimal efficiency scale is somewhere between 50%-70% load. If your system needs 390W then 750W is definitely a bit overpowered but it's much more safer choice over eg. 450W.

ps. Please check the end of the video I posted above and Jonny will explain to you what I'm trying to say.

Page 2 of 2

All times are GMT + 1 Hour