PSU question???/
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Posted by mroctober on November 26, 2005, 11:30 pm
Please log in for more thread options I have a Dell 8250, and it came with a ATI 9700. I recently upgraded to the X800 XT PE. I was just wondering if I was getting adequate power to my system. If not, can a Dells PSU be easily upgraded? And if so, which PSU would you suggest I purchase? thanks | ||||||||||||||||||||||
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Posted by UCLAN on November 27, 2005, 12:44 am
Please log in for more thread options Check out: http://www.pcpowercooling.com/products/power_supplies/selector/dell_index.htm | ||||||||||||||||||||||
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Posted by kony on November 27, 2005, 1:57 am
Please log in for more thread options On Sun, 27 Nov 2005 04:30:30 GMT, no@spam.invalid
(mroctober) wrote: >How can you tell if you are not getting enough power to your system?
> > >I have a Dell 8250, and it came with a ATI 9700. I recently upgraded >to the X800 XT PE. I was just wondering if I was getting adequate >power to my system. > >If not, can a Dells PSU be easily upgraded? And if so, which PSU would >you suggest I purchase? You haven't told us anything about it, like whether it has a branding or just "dell" on it, and the wattage (250W?). Dell's PSU are far more honestly rated than some, else it wouldn't have even worked with the R9700, and since you are replacing that card with one only a little more power hungry, it'll probably be ok but you are likely pushing the limits of the PSU and the ideal would be a larger unit. Measure the voltages with a multimeter under heavy load, like looping a gaming benchmark at moderately low resolution (so CPU is stressed fairly too). The multimeter is necessary, software or bios readings of a voltage level will not indicate a good or bad voltage level reliably. If it turns out to be a problem, post the specifics of the power connector pin #s vs their colors and any other connectors used besides the 20-pin ATX going to the motherboard. It might be a standard PSU and if so, that opens up a lot of possibilitites, while a proprietary unit would have to be purchased at far greater expense from Dell or (maybe) PC Power & Cooling. The ideal replacement would be spec'd for around 400W with at least 18A on 12V rail. | ||||||||||||||||||||||
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Posted by Paul on November 27, 2005, 5:25 am
Please log in for more thread options (mroctober) wrote:
> How can you tell if you are not getting enough power to your system?
> I have a Dell 8250, and it came with a ATI 9700. I recently upgraded > to the X800 XT PE. I was just wondering if I was getting adequate > power to my system. If not, can a Dells PSU be easily upgraded? And > if so, which PSU would you suggest I purchase? thanks X800XT PE power stats are here. Click the graphic at the bottom to see a magnified view. http://www.xbitlabs.com/articles/video/display/ati-powercons_4.html http://www.xbitlabs.com/misc/picture/?src=/images/video/ati-powercons/t1.gif&1=1 5V@3.33A 12V@3.25A , 63W total from all rails. Data is a bit harder to find for the 9700. This one gives 54W for a 9700 pro, while running 3DMark2001. No details on how this power was measured. http://web.archive.org/web/20041116012012/http://www.tecchannel.de/tecdaten/show.php3?catid=151&pageid=1015 There really isn't enough data to make a guess as to the impact of one card versus the other. From a total power perspective, they aren't too much different. Depending on how close to the limits the Dell is, on each DC output rail, would determine whether the addition of a different video card would "tip it over". If the Dell had voltage monitoring capability, you could see whether any of the rails are lower than they should be. Basically, you look at the rails when sitting idle in Windows, then have the monitoring software record readings while you game. If big sagging is evident in the collected data, that tells you the power supply is nearing the limit for the rail in question (say +5V or +12V). That is about all you can do, short of blindly replacing the PSU with something bigger. For a laugh, you can also try one of several power estimation sites. This one breaks down consumption per rail, but doesn't contain estimates for recent hardware. You can use some of the data from this page as a baseline, then add in measured values for hardware you find via other web sites. http://takaman.jp/D/?english Be aware that some of the power estimator web sites are grossly wrong. Some memory power numbers are wrong by a factor of 2 or 4. You can look up some real numbers, by visiting sites like Micron.com and downloading a datasheet for a real DDR DIMM and getting the number from there. Similarly, disk drive power numbers are available on the manufacturer web site, if you want a reality check. Paul | ||||||||||||||||||||||
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Posted by mroctober on November 27, 2005, 12:30 pm
Please log in for more thread options I just got off the phone with Dell, and he CSR told me that my PSU is
250w. Anyway, it appears that my rig is running fine, but I just wanted to ask here to see if I needed to upgrade. Should I upgrade to a new PSU? Here are my rig specs: Dell 8250 2.4 ghz 768 ram ATI X800XT PE (AGP) 120gb HD PVR150 Audigy 2ZS Platinum Logitech Z5300 Viewsonic VX924 LCD | ||||||||||||||||||||||
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> to the X800 XT PE. I was just wondering if I was getting adequate
> power to my system.
>
> If not, can a Dells PSU be easily upgraded? And if so, which PSU would
> you suggest I purchase?