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Radeon 5850 PSU

That will work. 500 watts is enough for any single card especially the new ATI cards.
 
Gym Rat said:
That will work. 500 watts is enough for any single card especially the new ATI cards.
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except for the fact that PSU is probably not capable of providing 500W. It certainly isn't designed for modern systems with high 12V demand

It is probably similar to this Xclio...http://www.hardocp.com/article/2007/05/23/450w500w_psu_battle_royal/14

Your current PSU, probably will work...but it isn't exactly a high quality unit.

BTW the 5850 will probably draw around 10A-13A during hard gaming.
 
I'd recommend a PSU replacement anyway. The Thermaltake Purepower line of PSUs were always crap.

What CPU do you have now? Also, are you planning on overclocking said CPU?
 
Danny Bui said:
I'd recommend a PSU replacement anyway. The Thermaltake Purepower line of PSUs were always crap.
Click to expand...

That particular PurePower is based on one of CWT's older designs. Hence, it is no better than an old CWT-built Antec. The only line of Thermaltake PSUs that are any good are part of the latest ToughPower line.
 
Danny Bui said:
I'd recommend a PSU replacement anyway. The Thermaltake Purepower line of PSUs were always crap.

What CPU do you have now? Also, are you planning on overclocking said CPU?
Click to expand...

i was overclocking my Q6600 to 3.6GHz at 1.4625v with my TRUE, but i used the Pro version of this:

http://extreme.outervision.com/psucalculatorlite.jsp

and found that when overclocking, when under full load from my video card, my 12v rail is loaded to 35.2A, when my PSU can only support up to 29A! needless to say i brought it back down to factory settings, where the 12v rail only has 25.5A on it.

when i change the video card to a radeon 5850, the 12v rail goes up to 27.7A, which is still okay, i guess.

basically, from what i can tell, unless someone else can enlighten me, my current PSU will be okay, but if i ever want to overclock, i'll have to get something beefier, right?

thanks :D
 
ubergeek14 said:
i was overclocking my Q6600 to 3.6GHz at 1.4625v with my TRUE, but i used the Pro version of this:

http://extreme.outervision.com/psucalculatorlite.jsp

and found that when overclocking, when under full load from my video card, my 12v rail is loaded to 35.2A, when my PSU can only support up to 29A! needless to say i brought it back down to factory settings, where the 12v rail only has 25.5A on it.

when i change the video card to a radeon 5850, the 12v rail goes up to 27.7A, which is still okay, i guess.

basically, from what i can tell, unless someone else can enlighten me, my current PSU will be okay, but if i ever want to overclock, i'll have to get something beefier, right?

thanks :D
Click to expand...

You seem to be ignoring what HOOfan_1, E4gle and I have been saying.

So let's recap:

First, that PSU is not capable of providing 500W. It's based on an old CWT design that was still old when it was released in 2007 as E4g1e and HOOfan_1 noted.

Second, that old design wasn't that good in the first place as HOOfan_1 noted and proved with the HardOCP review

Third, it was never designed for a modern system like yours.

Fourth, PSUs degrade in quality over time.

So considering that it was an old and not so high-quality design and wasn't even capable of 500W when it was released three years ago, it would not be a good idea NOW to use that PSU for a modern system even at stock speeds.

Some actual math. Using the Q9550 as a substitute and metric and assuming that you have the lower TDP G0 Q6600 stepping, a stock clocked Q6600 CPU + mobo + hard drive will take up around 126W at full load. A full loaded HD 5850 will take up 165W at full load. That's a total of 291W at full CPU and GPU load.

Is it possible that your PSU could run that current system? Possibly yes back in 2007. However by now, that PSU will more than likely not be enough as it's been three years and the design wasn't that good enough to begin with to have a slow enough degradation rate.

So get a new PSU. Something like the $65 Antec Neo Eco 520C 520W will be enough.
 
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