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Windows 7: Building a new computer, help/info needed!

07 Feb 2013   #51
TwoCables

 

Quote   Quote: Originally Posted by Layback Bear View Post
Layback Bears power supply choice method.
My max. computer requirements is 442W.
How did you come to find this out?


Quote   Quote: Originally Posted by Layback Bear View Post
I have a quality 850W power supply.
Why would I do such a thing. Well it's the sweet spot. If for what ever reason I would or could run my system 100% for a long period of time my AX850 would not be working very hard. What I call the sweet spot.
You're partially correct! I recommend reading these two articles:

On PSU Efficiency

PSU "50% Load" Myth


Quote   Quote: Originally Posted by Layback Bear View Post
When any power supply has to run at or close to it's max. it creates heat and noise. It also in most cases doesn't put out a clean amp/volt signal like it would if it was running in its sweet spot.
Not with quality-made units like the AX850. Check out this review at JonnyGuru.com:

Corsair AX850 Review


Quote   Quote: Originally Posted by Layback Bear View Post
It also gives me the ability to add just about anything I want without upgrading the power supply.
WARNING. Once you use a modular power supply you will be hooked on modular power supplies.
A modular power supply makes the assemble of a computer just a lot easier and neater. We all like easier but your computer will like neater. Keeping all those cable out of the way of proper air flow through the case.
P/S Pay attention on the amps on the rails not just total watts.
Yeah, you could have 4 x GTX 460s in your system and still be ahead.


My System SpecsSystem Spec
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07 Feb 2013   #52
Victor S

Windows 7 Ultimate x64
 
 

You get widely different PSU requirements using on-line calculators.
Thermaltake Power Supply Calculator 503w
ASUSTeK Computer Inc. -Support- Recommended Power Supply Wattage Calculator 800w

Terminology is different, but I put in as close to identical specs as I could.
Overclocking - I don't - changes it.
Removing a GTS 250, SLI and PhysX on the Thermaltake calculator knocks 503w down to 413w.
That was my original build, and I went with a Corsair 650w.
I'd really think putting a Kill-a-Watt on the power cord and doing a ballpark efficiency adjustment would get closer than these calculators.
I've read that PSU output degrades as they age. Don't know about that either.
It's just my "gut" feel that that going heavy on watts - +25-50% - is good insurance for a new build.
But I appreciate you input about overkill. Makes sense according to the Thermaltake calculator.
BTW, I was initially upset by the Newegg reviews when I did this build. I recall the Corsair being one with top ratings, but they were only 3 stars. Reviewers saying DOA, dying after a month, and bursting into flames.
Real horror stories. Same with the Asus P6T MB I bought. Ended up just forging ahead, as everything else was even worse. Everything has been flawless for 3 years. I wrote Newegg and suggested they put a "units sold" counter on their products. The assumption being that those with no problems don't bother giving bad reviews. Of course they pain no attention to me.
My System SpecsSystem Spec
07 Feb 2013   #53
TwoCables

 

Quote   Quote: Originally Posted by Victor S View Post
You get widely different PSU requirements using on-line calculators.
Thermaltake Power Supply Calculator 503w
ASUSTeK Computer Inc. -Support- Recommended Power Supply Wattage Calculator 800w

Terminology is different, but I put in as close to identical specs as I could.
Now try the PSU calculator I linked to. It is more accurate than these online ones. That's why it was created: to be the most accurate calculator available because it was recognized by the PSU experts that we have this problem that you just mentioned: online PSU calculators are not reliable.

The PSU experts who created it are true experts. They're not just amateur people who think they're experts. hehe


Quote   Quote: Originally Posted by Victor S View Post
Overclocking - I don't - changes it.
Removing a GTS 250, SLI and PhysX on the Thermaltake calculator knocks 503w down to 413w.
Wow. That's inaccurate. Can you do the calculation again, except this time click the calculator's built-in Print button and then post a screenshot of that page it generates? I can show you what's making it inaccurate.


Quote   Quote: Originally Posted by Victor S View Post
That was my original build, and I went with a Corsair 650w.
I'd really think putting a Kill-a-Watt on the power cord and doing a ballpark efficiency adjustment would get closer than these calculators.
Yeah, it would.


Quote   Quote: Originally Posted by Victor S View Post
I've read that PSU output degrades as they age. Don't know about that either.
This doesn't affect quality-made units like yours enough to worry about it. The internal components are of high quality and are designed to last several years. It's the lower-quality units that you have to worry about.


Quote   Quote: Originally Posted by Victor S View Post
It's just my "gut" feel that that going heavy on watts - +25-50% - is good insurance for a new build.
It can be if you know that your future requirements will call for it. That's not easy to predict though because each new generation of CPUs and GPUs requires less power than the previous. So the power requirement keeps getting lower and lower.


Quote   Quote: Originally Posted by Victor S View Post
But I appreciate you input about overkill. Makes sense according to the Thermaltake calculator.
BTW, I was initially upset by the Newegg reviews when I did this build. I recall the Corsair being one with top ratings, but they were only 3 stars. Reviewers saying DOA, dying after a month, and bursting into flames.
Real horror stories. Same with the Asus P6T MB I bought. Ended up just forging ahead, as everything else was even worse. Everything has been flawless for 3 years. I wrote Newegg and suggested they put a "units sold" counter on their products. The assumption being that those with no problems don't bother giving bad reviews. Of course they pain no attention to me.
lol yeah Newegg's reviews are only good as entertainment.
My System SpecsSystem Spec
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07 Feb 2013   #54
kbrady1979

Windows 7 Professional 64bit SP1
 
 

Is there anything wrong with the power supplies recommended? No? Alright then.
My System SpecsSystem Spec
07 Feb 2013   #55
TwoCables

 

Quote   Quote: Originally Posted by kbrady1979 View Post
Is there anything wrong with the power supplies recommended? No? Alright then.
All I'm trying to do is provide knowledge so that an informed decision can be made rather than relying on guesswork and opinions.
My System SpecsSystem Spec
07 Feb 2013   #56
kbrady1979

Windows 7 Professional 64bit SP1
 
 

There is no guesswork involved, those are top notch power supplies.
FIN
My System SpecsSystem Spec
07 Feb 2013   #57
TwoCables

 

Quote   Quote: Originally Posted by kbrady1979 View Post
There is no guesswork involved, those are top notch power supplies.
FIN
Yes there is, especially concerning how much power is actually needed.
My System SpecsSystem Spec
07 Feb 2013   #58
Britton30
Microsoft MVP

Windows 7 Ultimate X64 SP1
 
 

I trust Newegg's reviews. Period. Why you ask, Well I have written about some crappy items and they were published in all their negative glory. I know another member who has done the same.

PSU all have some peak/continuous rating of some sort. Having such a rating doesn't make one a good one though. The 80+ ratings take it all into account. Having a single 12V rail is desirable too.
My System SpecsSystem Spec
07 Feb 2013   #59
Layback Bear

Windows 7 Pro. 64/SP-1
 
 

TwoCables I did it the Layback Bear simple way. Used a couple of those online calculators and a little thinking. If those calculators are off a little and most don't agree with each other. No big deal I got lots of power supply to compensate. If you are asking if I believe my computer draws that much power,no or have I use calculation, charts and graphs, test equipment no I have not. I just keep it simple. Works for me.
My System SpecsSystem Spec
07 Feb 2013   #60
kbrady1979

Windows 7 Professional 64bit SP1
 
 

That is subjective, he might feel he needs more power in order to prevent problems or to add scalability. There is no guesswork though. I appreciate what you were trying to do and inform people of the technical aspect of choosing a power supply, but it's easier to say hey, several people are running these with no problems and they are built right, at a good price. What are you adding to the mix? I don't remember anybody looking for scientific tests looking to match a system watt-for-watt.

He has my suggestion, and if he needs anymore advice, I'll be glad to help. I'm done with the back and forth with you. Go ahead and reply and get the last word in, you've not helped as much as you think.

Good day.
My System SpecsSystem Spec
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 Building a new computer, help/info needed!




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