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TLD



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# 138238 26-Dec-2013 16:35
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With the worst possible timing, the PSU on my main system failed on Christmas eve.  Every where I have tried to get a replacement drive is closed until the 6th January.  I have left questions on TradeMe deals, but they have remained unanswered.  It's a big system used for video editing, and I need an 850W ATX supply.  Anyone know of a computer component store that is not closed through the Christmas period?

Thanks




Trevor Dennis
Rapaura (near Blenheim)

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  # 957622 26-Dec-2013 16:35
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Hmmmm. Here we go.




I am the Geekzone Robot and I am here to help. I am from the Internet. I do not interact. Do not expect other replies from me.



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  # 957631 26-Dec-2013 16:48
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Might help if you said where you are.


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  # 957632 26-Dec-2013 16:52
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Common sense is not as common as you think.


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  # 957635 26-Dec-2013 16:53
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Playtech are shipping the stuff I bought yesterday on the 27th. 

They're getting low on stock though. But there's http://www.playtech.co.nz/afawcs0139235/CATID=590/ID=17356/SID=289408136/productdetails.htm

Use BOX2013 in the discount code box in the shopping cart to get 18% off if you order before 10PM tonight.



TLD



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  # 957648 26-Dec-2013 17:54
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Excellent.  Thanks guys.  I'm near Blenheim, so it was always going to need to be shipped.  I wish I'd thought to ask earler today.




Trevor Dennis
Rapaura (near Blenheim)

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  # 957649 26-Dec-2013 18:03
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Item now ordered.  Thanks again.




Trevor Dennis
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  # 957663 26-Dec-2013 19:27
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Just curious, but what are you running that needs 850W?

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  # 957819 27-Dec-2013 09:24
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Modern graphics cards most likely.  Those will wear down a 600W easy.

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  # 957866 27-Dec-2013 10:10
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Remember, the better quality the PSU, the better chance it actually outputs the wattage that it claims to.

A rig needing 850W must be running something pretty serious. Dual GTX680's or somesuch?




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  # 957869 27-Dec-2013 10:22
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Yeah, pretty much as above; I'm often surprised by the PSU people think they need, sometimes for relatively modest hardware. Get a decent brand PSU and you usually don't need as high as many people think (or many of the calculators or GPU "requirements" say - but they often seem to well overstate the requirements - I guess because of the crap brand PSUs out there)  

PSU is definitely an area where you don't want to skimp on a build - but you should be concerned with getting a good brand that will actually output what it claims than just high wattage.

TLD



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  # 957981 27-Dec-2013 15:48
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I mentioned in the first post that this is a video editing system.  It's two years old, and the spec is

3930k @ 4.2Ghz water cooled
Z79-UD5
32Gb RAM
GTX570
14Tb storage over 12 drives including two raid0 arrays.  Actually, some of those drives are External USB3 WD My Books with their own PSUs. 

The system is nearly two years old, but still stands at 17th place in the PPBM5 results table
http://ppbm5.com/DB-PPBM5-2.php

It was in fourth place for a long time.  Note it was running at 4.4Gz

It has use an ADATA 750W Gold since new, which has twice before failed, but restarted when cooled down.  This time it is dead for keeps.  When it was built 8 GB sticks were expensive, so the MB has 8x4Gb sticks.  I have a second gen Velociraptor reserved for Photoshop Scratch and cache for Premiere Pro and After Effects, and even with 32GB RAM I sometimes see surprisingly big Photoshop temp files on the Scratch disk.

If I was building again now, I'd use a Thunderbolt MB like this one

I would also use at least two SSDs in a raid0 for the boot drive.  I have an MSI GT70 laptop which has a pair of SSDs in a raid0 for the boot drive, and it flies with >850MBs sustained throughput (as measured with Crystal Diskmark.  It opens Photoshop in less than two seconds from a warm start, and apps like Powerpoint are instant!

So I have designed in some more headroom with the replacement PSU, which I hope will see me though to the next build.

BTW  I don't work professionally in video, but this is the sort of thing I do

http://www.youtube.com/watch?v=5TkLTzBz5RU

I also work as a commercial photographer and graphic design (when I feel like it).  And spend a lot of time on the Adobe Photoshop forum

Thanks again for the help.  They have promised the PSU will get to me by tomorrow.







Trevor Dennis
Rapaura (near Blenheim)

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  # 957987 27-Dec-2013 16:07
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Just as a quick point about system design.  We get a few posts in the Photoshop forum about what computer should I build.  Photoshop is much lighter on resources than Premiere Pro or After Effects, and while I have seen Photoshop use all 12 threads for some functions, it never gets close to maxing out my system.  But Chris Cox, who is a Senior Computer Scientist in the Photoshop Development Team, made an interesting point this week.  When asked if Photoshop will use as many cores and threads as available, he said that with todays processors, the bottleneck is usually memory bandwidth.  So RAM needs need to be fast as well as plentiful for best performance.

I know very little about Games, except far from all of them will make use of more than four cores.  Least ways that used to be the case, and they are far more reliant on GPU performance anyway.  Adobe apps can not make use of multiple GPUs AFAIK, and most of the hardware problems we see with Photoshop are video card driver related.  This is especially true with Windows 8, and we are seeing a ton of problems with Mavericks.   The big manufacturers seem incapable of playing nicely together to fix these problems.




Trevor Dennis
Rapaura (near Blenheim)

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