[NBA] UPS for my C2D PC - How many watts to get?

[humair1]

I want to buy Ups for my system ..
system Config :-

Cpu = C2d
Mobo = p5g41tmlx
Memory = ddr3 Dominator
GFX= 4870 1gb
Powersupply = 500 cm extreme
LCD monitor = Samsung 18.5 led

and 1 Adsl router + wifi router

plzz help me tht How many watts Ups i would buy ?? tht can run aprox 3-4 hours

 

[theundead]

ur cpu takes 500w, coz u have a 500w psu, add the monitor, router, etc, & safety margin, get approx 1000w computer UPS with sine wave, & a strong battery like 200amp or more
my system, close enough to yours, runs on a 500w ups for around 2-2.5 hours, but no gaming;only browsing & office etc, coz the ups doesnt give full 500w, & the power demand of the 6790 is not met

 

[HAMMER of THOR]

^^ that is very wrong bro...it is a 500w psu which is about 70% efficient... i think you will not need more than a 500w psu... as at full load your pc won't be going above 400W and led monitors are very easy to drive... your total will never exceed 500W no matter what you do...

 

[theundead]

[MENTION=1245]HAMMER of THOR[/MENTION]
a 500w psu uses 500w at full load, even though it gives less to the system, depending on efficiency. i.e its input will be 500w & output will be 400w at 80% efficiency, so its not exactly "very" wrong
moreover, pakistani UPS are also not even 80% efficient, so even if we take 70% efficiency of ups, its output will be 700w for 1000w ups, keeping a margin of safety & other factors, i think a 1000w ups is justified, esp for gaming

 

[HAMMER of THOR]

oh well i was thinking the same thing but i don't think it would happen... i will have to read up a little to explain properly which i don't want to do...

 

[funky]

700va is enough for you

 

[smaaz]

have a 500Watts desi ups with 155Amps battery, my system is i3 2100, gtx-275, 23" lcd, 5.1 creative speakers, 500watts silverstone psu and mobile/laptop/modem chargers .. and it runs for more thn 4 hours without restarting if light goes out (not in the case if you are gaming), i can easily watch movies/surf web/listen to muzik without hitch for more thn 4 hours.

 

[mostwanted]

Im using desi ups 700w with 200amp ags battery it gives me solid 5-6 hrs backup with one fan and one 18w energy saver.

 

[na33m]

also thinking about a ups, do you guys stick it up with a stabilizer or just direct connection to ups?

 

[sohaib50k]

And note that VA does not equal to Watts.

 

[AbbY]

ur cpu takes 500w, coz u have a 500w psu, add the monitor, router, etc, & safety margin, get approx 1000w computer UPS with sine wave, & a strong battery like 200amp or more
my system, close enough to yours, runs on a 500w ups for around 2-2.5 hours, but no gaming;only browsing & office etc, coz the ups doesnt give full 500w, & the power demand of the 6790 is not met

Hey the 500W thing is a very wrong generalization.
There's a little thing called 'Current' aswell. 12V and 220V makes a who lot of difference in that aspect too. Secondly, if I put in a 1000W psu in my rig, it wont mean that I need 1000W to run it.

---------- Post added at 05:50 PM ---------- Previous post was at 05:49 PM ----------

Get a 1KVA/800W UPS with a 115-155Ah battery and you're good to go. Sine Wave doesn't matter. What matters is the switchover time.

 

[shoaibasghar]

Sine Wave doesn't matter.

sinewave doesnt matter that much if you have a good psu. now it doesnt mean get a ghatia ups which gives square wave at output.

cpu=500w
lcd=new one take very less im going to assume yours take 40w(its on the back usually)
adsl router etc( 5-10w)
if speakers account for those.
currently your load is less than 600 watts, so get a 600-650watt (VA RATING WILL BE GREATER THAN THIS-TELL THEM TO GIVE YOU WATTS).
as for back up time, it will depend on how many amperes the battery holds. more means more backup.

What matters is the switchover time.

Again good psu's take those fluctuactions into account.But tell them you are using computer with it and they will give one with fast switchover time. Also if its a good ups it will have voltage stabilizer in it.

 

[AbbY]

sinewave doesnt matter that much if you have a good psu. now it doesnt mean get a ghatia ups which gives square wave at output.

cpu=500w
lcd=new one take very less im going to assume yours take 40w(its on the back usually)
adsl router etc( 5-10w)
if speakers account for those.
currently your load is less than 600 watts, so get a 600-650watt (VA RATING WILL BE GREATER THAN THIS-TELL THEM TO GIVE YOU WATTS).
as for back up time, it will depend on how many amperes the battery holds. more means more backup.

Again good psu's take those fluctuactions into account.But tell them you are using computer with it and they will give one with fast switchover time. Also if its a good ups it will have voltage stabilizer in it.

You know what?
Even the APCs have more or less a square wave. Plugged it in the Oscilloscope to see myself.

Thing is, it doesn't matter. Logon nai aieween tamasha machaya huwa hai. Besides, you'll get the stimulated sine wave only on the ups times. WAPDA/KESC and it'll be normal sin wave anyway.

LCD takes less than 30W. LED takes barely 5W. CPU cannot take 500W. Sorry.

__

As far as the PSU part is concerned, good PSUs will manage it at idle. Not at load. Capacitors cannot retain enough to keep it running at load no matter what psu you have, and that's a killer for your HDDs and SSDs.

 

[shoaibasghar]

As far as the PSU part is concerned, good PSUs will manage it at idle. Not at load. Capacitors cannot retain enough to keep it running at load no matter what psu you have, and that's a killer for your HDDs and SSDs.

im not saying it will do it on full load and for move than a second or two but thats enough time for ups's to kick in usually. anyways the main thing asked is rating of ups which i believe should be aroung 6oo watts mark.

CPU cannot take 500W. Sorry.

would you elaborate on that? cz i believe at full load (playing video game at max graphics) it will go very near to that.

 

[AbbY]

im not saying it will do it on full load and for move than a second or two but thats enough time for ups's to kick in usually. anyways the main thing asked is rating of ups which i believe should be aroung 6oo watts mark.


would you elaborate on that? cz i believe at full load (playing video game at max graphics) it will go very near to that.

That depends more on your rig than your PSU.

If I house a 1000Watt PSU yet my cumulative system load is 200W, it will need 200W. Not 1000W. That's what I'm saying. As far as load is concerned, that can be calculated once one has the GPU's and Processor(s) known. His system cannot consume 500W at peak load. Not more than 300-320W is my guess. Will have to calculate for a precise assertion.

 

[imetamorphic]

Hope this helps

Hey Humair1, I'm also considering buying a UPS for my PC, which has almost the same specs as yours. I found this link quite helpful in estimating the total power consumption of my PC:
Calculating Power Consumption Of The Entire System : How Much Power Does Your Graphics Card Need?
What you need to do is add up the watts of your PC's individual hardware and reach a total, and then you divide that total with the efficiency of your power supply, which ranges depending upon your Power Supply Unit (PSU). Say, for example, you estimated that your PC hardware consumes 300 watts (under full load), you need to divide that by say 70%, which gives you a value of 430 watts.
Then you add the watts of your peripherals like the LCD/LED monitor, speakers and printers, or routers and switches you want to run on the UPS. You can visit the website of your particular device and check its power rating from there, in watts.
Now that you have the total power consumption for your setup, say 550 watts, you buy a UPS with an output capacity around 20 to 25% higher than that total. In this example, that comes out to be around 660 to 690 watts.
Since you’re running sensitive equipment here, I would strongly suggest you buy a pure sine wave UPS, like the APC Smart-UPS for instance. Pure sine wave UPS are generally quite expensive but since we have quite a few refurbished models coming into Pak, they don’t cost you any more than the brand new inverters you will get from the market, like say the Homeage Invertors. (Do correct me if I’m wrong)
In the example I just made, an APC Smart-UPS 1000, will suffice, as it has an Output Power Capacity of 670 watts. It will cost you around Rs9,500 to 11,000. (At least that is the price in Rawalpindi markets)
If you also want to run tube lights/energy savers/bulbs or fans, etc on the UPS as well, I would suggest you look for the 1400VA or 1500VA model, which have an output capacity of 950w and 980w respectively. These will cost you around Rs13,000 to 16,000 in the market. But then again, you will have to calculate how many watts your bulbs or fans are consuming, and leave at least a 20 to 25% margin.
This post has already become quite lengthy, but just so you know that after you’ve decided on the UPS, you need to decide which batteries to couple it with. Quite obviously, in Pak we don’t need minutes but hours of backup, so the standard batteries of these UPS will not do. You will have to purchase a Wet Cell (flooded) car/truck battery from the market, or two, depending on your requirements. I’m still working on the battery requirements for the UPS but I will post them once I’m well-versed on the topic. Here area a few helpful links:
What is an Amp Hour and How to Calculate Battery Capacity | OverlandResource.com – Overland expedition travel info.
http://www.batteryweb.com/pdf/inverter_battery_sizing_faq.pdf

Note:
I put up an efficiency of 70% for the PSU because low-end Cooler Master PSUs like the one I have got low efficiency. Better PSUs like Corsair and Antec have better efficiencies around 80 to even 86%.

Also, the PC’s wattage is based on the maximum power it will consume under peak load, say when you are gaming. On normal usage, say when you’re browsing the internet, the load will be much lower; you can estimate that on your own if you have the time.

For you're convenience, this is the estimated power consumption of my PC:

Processor ---------Pentium DC 2.5Ghz E-5300 --------Max 65w
Motherboard ------Asus 750i SLI -------------------------20w
RAM --------------Crucial Ballistix 2GB --------------------6w
Graphics ----------ATI Radeon 4870 1GB -----------Max 160w
Sound card -------SB X-FI Xtreme Gamer ----------------15w
HDDs -------------1TB Western Digital Green ------------10w
-------------------------------500GB Seagate Barracuda 15w
Optical -----------24x Sony DVDRW ---------------------20w
Sub-total ----------------------------------------------311w
With CM Extreme Power 600 PSU, 70% eff.: -------------445w

Monitor ----------Viewsonic VX2450wm-LED ---------Avg 23w
Speakers ---------Edifier R501 5.1 ------------------Max 90w

Total ---------------------------------------------Max 558w