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MSI RADEON 6850 ON 400 W PSU

Last response: in Graphics & Displays
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July 11, 2012 5:56:22 PM

Hello guys.I'm new here so don't laugh if i make some mistakes.
I have a bad graphics card and i'm considering upgrading my gpu.
I have a 400 w psu that came with my case.
It is a non-marked psu.
So i'm interesed will i be able to run 6850 fo atleast a few months on that psu.
I have visited this site http://images10.newegg.com/BizIntell/tool/psucalc/index... and it turned out that my psu is good enough.So I'm asking you just to make sure.I'm planing to buy a new psu in 2 or 3 months.I don't play have games like BF3 Crysis, I just play CoD 4 mp(promod).
I would be delighted if you answer my question.
And here are my specs http://images10.newegg.com/BizIntell/tool/psucalc/index...
Thaks! :) 
This is the link of a graphics card http://www.hgshop.hr/shop.aspx?q=&pid=58992
July 11, 2012 6:16:48 PM

Given the unbranded PSU and the fact that you're likely very close to limits using that card, I'd be hesitant to say things would be rosy if you put it in your system. Having said that I think under normal loads it would do just fine, you might get some issues when taxing it though. Quality of the PSU is an important variable in all this.

But "recommended" outputs are generally way overstated, so...
a b U Graphics card
July 11, 2012 6:17:00 PM

The second link is a duplicate of the first so I'm not sure what your system specs are.

AMD recommends a 500w power supply for the 6850. It draws about 230w under load. Whether your 400w PSU is enough depends also on the amps on the 12v rail.

Further, low quality power supplies will often not be able to sustain the maximum wattage for long periods, so it depends on the quality of your PSU.
Related resources
a b U Graphics card
July 11, 2012 6:18:29 PM

just FYI, we can't see what you inputted into the calculator

but im as well running a 6870 on a 400W psu, with an overclocked cpu, so you should be safe as long as it's not cheap (i had a 465W cheap (coolmax) psu die from cpu overclocking :p )

edit: gotta love when 3 awnsers pop up like that lol
a b U Graphics card
July 11, 2012 6:20:22 PM

jsrudd said:
The second link is a duplicate of the first so I'm not sure what your system specs are.

AMD recommends a 500w power supply for the 6850. It draws about 230w under load. Whether your 400w PSU is enough depends also on the amps on the 12v rail.

Further, low quality power supplies will often not be able to sustain the maximum wattage for long periods, so it depends on the quality of your PSU.


no, it pulls under 150W... mine pulls 140 and it's an "overclock" edition
July 11, 2012 6:28:00 PM

I have a AMD ATHLON x3 450 3.2 ghz(i'm not planinng to overclock it) ram-4 gb ddr3 1333 mhz single slot, hdd 500 gb 7200 RPM 3.5, motherboard ASUS M4A78LT M LE. I'll check the psu now and i'll reply it to you guys.
Thanks for the answers do far!
a b U Graphics card
July 11, 2012 6:30:01 PM

is their a sticker on the side? b/c they usually list the rails and their limits there
July 11, 2012 6:46:23 PM

PSU is : QC LC 8400btx, I dont't think it will be able to run msi 6850
a b U Graphics card
July 11, 2012 6:49:15 PM

can you take a picture of the sticker on the side, i can't find the info online
a b U Graphics card
July 11, 2012 8:52:02 PM

that will be fine
July 11, 2012 9:03:53 PM

are you sure?? coz i'm gonna buy it tommorow...i'm not planinng overclocking this card,so everything will be running at stock settings...
a b U Graphics card
July 11, 2012 9:09:12 PM

yes, you have 300W of 12V power, that leaves alot of headroom
July 11, 2012 9:25:25 PM

Thanks a lot! Cheers man! :D 
a b U Graphics card
July 12, 2012 2:42:52 PM

i thought you had this figured out?
July 12, 2012 2:43:17 PM

Card manufacturers frequently overstate PSU requirements. If you read back through this thread you'll see that your card draws around 130W under load, so this leaves you with quite a bit of breathing room, especially if you don't plan to overclock and your system is otherwise stock. Most of this depends on the quality of your PSU, which from what I can tell from other posts on this thread is adequate. Assuming you have a quality PSU, I'd feel comfortable saying you are good to go with the 6850, assuming all the assumptions I've state here are true.
July 12, 2012 2:49:41 PM

Thats what I wanted to hear.I'm in doubt becouse few people told me that my psu wont be good enough, exactly that my 6850 wont be getting enough power.So, from you two guys i can be sure that everything will work propertly. Anyone else?
July 12, 2012 3:20:56 PM

Further adding to your video card angst, have you considered the 7850? Power requirements are very similar to the 6850 and it's a much more powerful option. However, it's about $100 more.
a b U Graphics card
July 12, 2012 3:28:27 PM

OSU Cowboy said:
Further adding to your video card angst, have you considered the 7850? Power requirements are very similar to the 6850 and it's a much more powerful option. However, it's about $100 more.


i thought the power requirements we're about half?
but they are pricier
July 12, 2012 3:31:52 PM

The power requirements between the 6850 and 7850 are very close, but yes the 7850 is about $100 higher. Might be an option if money isn't too tight.
July 12, 2012 4:52:04 PM

Yeah, money is a problem.I'll buy 6850 and in a few months a new psu.
Thanks everyone!
This is done now. :) 
a c 273 U Graphics card
July 12, 2012 4:53:21 PM

This topic has been closed by Mousemonkey
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