Help on smps

lava1789 · Sep 29, 2014

I am planning to buy a new Samsung 840 evo ssd+ wd black wd1003fzex as my prev hdd is old and is about to drop its neck. My sys. specs. are:
proc: i7-2600,
mobo: Intel woodworth DH61WW(1pci, 1pci-ex1,1pciex16,4 sata2 ports),
(4gb x 2 =)8gb ddr3 sdram 1333Mhz,
Graphic card: NVIDIA Quadro 2000(1GB, GDDR5),
optical Drive: Tsstcorp CDDVDW SH-S223C ATA Device,
Monitor: Dell ultrasharp U2312HM,
smps: iball JS-252 ATX smps.
I searched a lot regarding this smps but dont got any info. I want to know will it be sufficient for the sys with the new ssd+hdd (replacing the old one obviously

).
Please help me.

MeteorsRaining · Sep 29, 2014

It'd be fine, SSDs/HDDs don't stress the PSU (SMP).

lava1789 · Sep 29, 2014

Thanks MeteorsRaining for quick reply. I want to know the wattage rating of it & how can we calculate it since just by adding power on all lines doesn't give the answer. I have uploaded pic of smps.
http://

MeteorsRaining · Sep 29, 2014

For all real world purposes, the wattage on 12V line is enough to tell if the PSU would be able to handle the load or not, the one on the mentioend PSU is 18A, not so great wattage wise, which's 12V*18A=216W. Appears to me like a 250 or 280W PSU.

lava1789 · Sep 29, 2014

Oh!!!!:lol: I just got my eyes on the bar code sticker on smps. There's the cabinet no.. I looked for it & I got the exact value its 250W.
Anyways thanks MeteorsRaining.
one more question:

MeteorsRaining :

I got this but to be specific if 216W comes from the +12V line where the other 34W comes from? Will u please explain me how to exactly calc the rating of psu?
Also, in prev reply, u said my current psu would be sufficient, but the psu calculators gave me some different numbers:-
powersupplycalculator.net: Idle-85W, Load-243W, Recommended-344W
coolermaster PSU Engine: Recommended min PSU-285W
extreme power supply calc.: Min.-410W, Recommended-460W
I used cap ageing =30% since the desktop is being used almost for 18 hrs sometimes up to 20 to 22hrs & already the sys except gpu & monitor are about 4 yrs old.
I know these calcs are not exact and sometimes they give some values more than required but there is a noticeable difference. If these are correct then the sys is not able to work at full power. Correct me if I am wrong? Hey buddy, there is no intention of proving u wrong. Just want to clarify my doubts.

MeteorsRaining · Sep 30, 2014

got this but to be specific if 216W comes from the +12V line where the other 34W comes from? Will u please explain me how to exactly calc the rating of psu?

There as some catches here, the wattage of the PSU (the whole unit) is 250W. The wattage on 12V lines (on which all the components of computer depend) is 216W (at peak, not continous, meaning you won't be getting 216W continously (quality plays a role here) if the system demanded for it. The rest is substracted from the total wattage, ie, 250-216=34W, for all other lines combined, ie, 3.3V, 5V, etc.

A good read through these articles would help you greatly:
http://www.jonnyguru.com/forums/showthread.php?t=1036

^The "Watts don’t mean squat!! Know how to read the label!" section to be specific. And a simplified version is available here:
http://compreviews.about.com/od/cases/a/PSUWattage.htm

So, in short, the 15A on 3.3 and 5 volt lines do not add up. The max wattage on these 2 lines would be 34W combined.

Now,

powersupplycalculator.net: Idle-85W, Load-243W, Recommended-344W
coolermaster PSU Engine: Recommended min PSU-285W
extreme power supply calc.: Min.-410W, Recommended-460W

A simple suggestion is, they are not completely correct. Consider this:
CPU TDP: 95W
GPU TDP: 62W
Total: 157W
Now, no other component consumes noticible amount of power,

MoBo+RAM combined would be ~30W unless all the PCIe slots are filled, then the TDP of each peripheral (like sound card, WiFi adaptor, etc) are taken and added.
Also, SSD consumes at most 3W at full loads. HDDs go about 8-10W.
Even after adding up everything, you're still below 216W.

So, if the system is currently working without issues, and especially if its a pre-built, there's no chance it'll fail by adding 3W (as you'll replace the old HDD).

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