RyanAn
Hi Guys,
Hope you are all doing great, I bought the dell desktop Studio XPS 435MT from the us around 2 years ago; Since then I have been using it in lebanon with so much difficulties regarding buying a compatible ups for this desktop.
I have bought around 3 different upses to try them on this desktop and none worked, whenever the electricity switches to generator or vice versa or the electricity goes for a very short period of time, the pc restarts or shuts down. After many repeats of such scenarios, it is now freezing twice when I turn it on, I have to return it off then on twice to make it work.
I have read on the Dell forums, they have requested to buy a pure sine wave ups which costs around 500 $, an amount I am not willing to pay right now. Some other guy posted that he tried the power supply "Corsair TX650" which made it worked, I can't seem to find such power supply in Lebanon.
Please be of advice.
Thanks,
Ryan
AvoK95
The Dell Studio XPS 900 uses a 475W PSU.
Most shops today sell only 650VA UPS-s which are around 390Watts.
You don't need a 500$ UPS for your system.
You can get a 850VA (552.5Watts) or a 1000VA (650Watts) UPS or you can always overkill it with a 1200VA (780Watts) UPS , to run your case, monitor and other peripherals.
You can check
PC and Parts if you want to buy a UPS.
Bear in mind that you need to charge a UPS for at least 8 to 12 hours before use.
taekh3
@RyanAn: Hello Mate,
I can get you the “Corsair TX650 PSU"; or any other item you want. Check my FB Page and stay tuned over there.
Regards.
AvoK95
He doesn't need a new power supply.
Dell support doesn't understand the concept of a UPS.
They think that the PSU is failing and that's causing the system to freeze and restart.
taekh3
@Avok95: Mate, I know that ;), I was replying on RyanAns claims concerning the availability of “Corsair PSU’s” in Lebanon.
Regards.
The-MMMs
i would switch out your PSU anyway just for safe measure.
RyanAn
Hi guys, thanks all for the prompt replies, you guys rock.
@ Avok, I don't think its a watts issue since I have connected to the desktop the PC star ups w 1200 d which cost me around 100 $. Btw I forgot to note that when I am not in a game sometimes the pc doesn't turn of but when I am playing dota 2, it automatically turns off when the electricity switches.
@ Tarek, sure thing will check your website for now, but I'm gonna wait to see what I'm gonna do first to know where exactly is the problem.
Thanks alot guys,
Ryan
thunderman
It looks like a UPS issue to me too,
If the system remains on when you are on the windows desktop but it doesn't when gaming this most probably means that your ups is unable to handle the load due to the discrete graphics card load as well as the higher cpu frequency voltage and load when gaming.
Most low end ups are over rated the "PC star" 1200 is most certainly not 1200 Watts but 1200 VA and even then i don't think that it would really handle 1200 VA.
But if you are not overclocking your system it shouldn't be pulling too much load so i would first start with
the UPS battery, if you've been running it for quite some time it could have lost most of its capacity, and this caused a quick voltage drop making the ups unable to handle the load even for a split second, the best solution for you would be to replace it anyway as its quite a cheap option.
(depends on the type and size of the battery but you should be able to get a ups sized 12V battery for 20.000LL).
keep us updated
Best
RyanAn
Thanks for your reply Thunderman,
How can I know which battery I need to get to replace my ups's ? Does the "Battery for UPS 12V 7A $16.00 u-0" from pc and parts work on my pc star ups, is it a good option ?
Ryan
RyanAn
Btw sorry for the confusion, its not a 9000 xps, its a "Studio XPS 435MT" I just changed it in the first question.
Thanks,
Ryan
AvoK95
RyanAn wroteThanks for your reply Thunderman,
How can I know which battery I need to get to replace my ups's ? Does the "Battery for UPS 12V 7A $16.00 u-0" from pc and parts work on my pc star ups, is it a good option ?
Ryan
Yes it's a good option I use that battery on all my UPS-s
RyanAn wroteBtw sorry for the confusion, its not a 9000 xps, its a "Studio XPS 435MT" I just changed it in the first question.
Thanks,
Ryan
That changes everything !!
The Studio XPS 435MT is a high end i7 PC which draws a lot more power.
Can you please specify the wattage of your PSU ?
RyanAn
Sure thing, I am not currently at home but asked my bro to check me the wattage of the psu.
He found on the back of the pc without opening it from the psu side, the following info:
V: 100 - 240 v
A : 10 A
Hz : 50-60 Hz
He then opened it and found written on the psu 15 A and 250 v.
Then i checked my serial number and checked online and got the following components(if they may help chosing a ups):
http://www.dell.com/support/troubleshooting/us/en/04/Index
in the link under system configuration, system components, I found the following line to be relevant "INSTRUCTION..., DEV-CHAS L6 TO L5.5, 475W". Does this mean that the psu is 475 watt ?
Thanks alot,
Ryan
AvoK95
Yes that does mean that your PSU is 475Watts , which takes us right back where we started.
RyanAn
I guess I will try changing the battery of the ups for now and see how it goes from there.
Thanks,
Ryan
RyanAn
Hi, I got 2 batteries from Pc and parts for my ups, turns out to be it needs 2 batteries which I replaced, and Still my pc turns off or restarts when the electiricty switches from generator to electricity or vice versa or when electricity goes only whenever im in game playing dota 2.
Also my pc now freezes or auto restarts 2 times whenever I turn it on, then it becomes stable on the 2nd restart.
Please any advice ?
Thanks,
Ryan
yasamoka
So sorry RyanAn, I tried to explain this to AvoK95 the other day, but didn't have enough time to post, then forgot about it.
The reason you are experiencing these issues IS due to the PSU. There is a feature called power factor correction. When this is unavailable, the PSU resorts to gulping down large quantities of charges (capacitors) then releasing them to the system. What this means is that power draw isn't smooth, that the PSU could draw 2000W for 1 second then 0W the other (of course, frequency is higher, but you get my point).
The issue is that no UPS could realistically cope with these sustained loads. They are sustained for longer than the UPS can handle, and thus when electricity switches off, the PC restarts.
A "sine wave" UPS means a UPS that is in phase with the PSU. Meaning when the PSU draws high power, the UPS would be providing it, at the same time.
The alternative, as someone suggested, is a PSU which has "active Power Factor Correction" (active PFC). This means that it draws power smoothly and not in gulps. Those are better for power grids which are properly balanced, and, of course, normal UPSes.
Now don't regret your purchase. It's good that you scaled up from the previous UPS you had.
What would really help you is not a regular voltmeter, because I guess those are insensitive to such fast voltage changes and do not update fast enough anyways. What would really help you is an Oscilloscope. Now those are pretty expensive, but if you have a friend who has one, or you are in a university which has those (AUB), or in a school which has those (IC), then you can use it to see max power draw.
If I am able to, and you willing, I will ask at IC for access to the oscilloscope, provided that our physics teacher is there.
Now if it were me, I would advise you, before you buy, to try such a PSU. I have the Corsair HX850 power supply, using it in my current system, a weak 1200VA PSU which cannot sustain more than 400W used to work on it when it was under moderate load with Main GPU + CPU at full load, running GTX260, Core i7, 9600GT PhysX card. It is in the same league of what you need. You are free to try that, when you wish.
Cheers.
RyanAn
yasamoka wroteSo sorry RyanAn, I tried to explain this to AvoK95 the other day, but didn't have enough time to post, then forgot about it.
The reason you are experiencing these issues IS due to the PSU. There is a feature called power factor correction. When this is unavailable, the PSU resorts to gulping down large quantities of charges (capacitors) then releasing them to the system. What this means is that power draw isn't smooth, that the PSU could draw 2000W for 1 second then 0W the other (of course, frequency is higher, but you get my point).
The issue is that no UPS could realistically cope with these sustained loads. They are sustained for longer than the UPS can handle, and thus when electricity switches off, the PC restarts.
A "sine wave" UPS means a UPS that is in phase with the PSU. Meaning when the PSU draws high power, the UPS would be providing it, at the same time.
The alternative, as someone suggested, is a PSU which has "active Power Factor Correction" (active PFC). This means that it draws power smoothly and not in gulps. Those are better for power grids which are properly balanced, and, of course, normal UPSes.
Now don't regret your purchase. It's good that you scaled up from the previous UPS you had.
What would really help you is not a regular voltmeter, because I guess those are insensitive to such fast voltage changes and do not update fast enough anyways. What would really help you is an Oscilloscope. Now those are pretty expensive, but if you have a friend who has one, or you are in a university which has those (AUB), or in a school which has those (IC), then you can use it to see max power draw.
If I am able to, and you willing, I will ask at IC for access to the oscilloscope, provided that our physics teacher is there.
Now if it were me, I would advise you, before you buy, to try such a PSU. I have the Corsair HX850 power supply, using it in my current system, a weak 1200VA PSU which cannot sustain more than 400W used to work on it when it was under moderate load with Main GPU + CPU at full load, running GTX260, Core i7, 9600GT PhysX card. It is in the same league of what you need. You are free to try that, when you wish.
Cheers.
Thanks a lot for your very well explained reply Yasamoka; No worries about not posting it earlier, Im sure the batteries wont go to waste.
Your idea of trying the corsair PSU is great, but I don't want it to be a hassle for you, is trying a psu easy ? Sorry guys not a techie expert.
Also would changing my PSU clear the freezes and the restarts I am having when turning on my pc?
Thanks Alot man,
Ryan
yasamoka
@RyanAn: yes it's relatively easy.PM me for details if you want to try it.
RyanAn
Hi guys, I read around that the Thermaltake Toughpower 700W power supply is good for my system and will solve my problems without the need of a sine wave ups, Anyone of u knows a place in lebanon that sells such a unit ?
I checked pc and parts and microcity they dont have it, IF that doesnt work I guess I don't have another option then to buy APC 1000 Smart sinewave ups from pcandparts for 450 $ :(
Thanks,
Ryan
