I have a Thermaltake Purepower 500 NP. Its 500W max, but I'm more worried about amps. This PSU has +12v V2, and it says it has 15 amps going through it. If it turns out to be not enough, will the molex-to-6pin converter put through enough amps?
Ordered new video card
#1
Posted 01 May 2009 - 03:58 PM
I have a Thermaltake Purepower 500 NP. Its 500W max, but I'm more worried about amps. This PSU has +12v V2, and it says it has 15 amps going through it. If it turns out to be not enough, will the molex-to-6pin converter put through enough amps?
#2
Posted 01 May 2009 - 04:47 PM
I was just checking this out for you.
check out this link to EVGA:
EVGA says min amperage is 24 if you have a 15amp min. You will need to upgrade your PSU
Without it your computer will be unstable with constant shutdowns\errors due to a lack of power
Hope this helps. If you need anything else let me know.
Good luck
Cbarnard
#3
Posted 02 May 2009 - 09:52 AM
The equation we'll be working with is the equation for power which is:
P=IV, or Power (watts) = Current (amps) x Voltage (volts)
Now, in addition to the two +12V rails, the PSU has a +3.3V rail, a +5V rail, a -12V rail, and a +12VSB rail.
To determine how much power each of these rails is capable of using...
The +3.3V rail has 22A on it, so it has a maximum output of 72.6W (3.3 x 22).
The +5V rail has 32A on it, so it has a maximum output of 160W (5 x 32).
The -12V rail has 0.3A on it, so it has a maximum output of 3.6W (12 x 0.3).
The +5VSB rail has 2A on it, so it has a maximum out put of 10W (5 x 2).
Add all these outputs up, and you get 246.2W. Subtract that amount from the total maximum output of the entire PSU (500W), and you are left with 253.8W for the +12V rails.
Then, you simply divide 253.8W by 12V, to get 21.15A. So, the output on your +12V rails is 21.15A.
Of course, this is still not as much as EVGA recommends (24A), but it's pretty close, and those recommendations are always more than is what actually is required. If the video card is on its way, you might as well try it with your current PSU. If you experience system instability or graphical artifacts, then you know it's time to come back here for PSU recommendations.
#4
Posted 02 May 2009 - 08:58 PM
Also, the PSU you provided was the exact one I have!
Edited by fortune82, 02 May 2009 - 09:05 PM.
#5
Posted 02 May 2009 - 10:53 PM
Unless of course it doesn't reach (but it should)
If you were to use an adapter, it will make a very minimal difference in amperage. The run is very short so I wouldn't be concerned about it.
If you made connection on top of connection etc... several times it would start to make a difference.
I hope this answered your question.
Good luck
Cbarnard
#6
Posted 02 May 2009 - 11:39 PM
#7
Posted 02 May 2009 - 11:54 PM
I knew that it would not make a difference(amperage wise).
I was trying to point out (in case he didn't know) that the 6 pin plug came standard with the PSU
I always prefer not to use adapters unless it is necessary.
I misunderstood that he was trying to get more power by using a different branch in the wiring(utilizing the molex connectors). In my mind I knew they were based off the same 12v line so I missed the point.
Thank you for the clarification
Cbarnard
#8
Posted 03 May 2009 - 04:59 AM
All it would powering is:
AMD Athlon X2 5400+
4GB OCZ DDR2 800
500GB Maxtor Sata HDD
LG 20X IDE DVD/CD
EVGA nVidia 250 GTS
Also, it needs to be relatively cheap. After this video card, I don't have much left.
Edited by fortune82, 03 May 2009 - 05:00 AM.
#9
Posted 03 May 2009 - 10:12 AM
#10
Posted 03 May 2009 - 06:29 PM
#11
Posted 05 May 2009 - 06:10 AM
I will bookmark it, but for the time being, I'm stuck with my 500W. The only money I (will) have is $16, so I'll have to hope Newegg has a nice sale soon.
A little hint if you are to get a new PSU: don't be fooled by some generic PSU's boasting with their rated amperages. There are many ways to measure them, e.g. the temperature: the amperages delivered are different (higher) if the temperature is lower, and that is the reason why some low-life leeches do their measurements in +20 centigrades instead of +50 which would be a lot closer to the real world situation. Pick some known brand and you have one less problem. It is the wrong spot to save money when selecting the PSU.
#12
Posted 05 May 2009 - 03:10 PM
Similar Topics
0 user(s) are reading this topic
0 members, 0 guests, 0 anonymous users