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New computer almost complete, final thoughts..

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February 21, 2010 5:00:59 PM
February 21, 2010 5:11:04 PM

The PSU is about 50W~80W shy, with that monster gpu ... little overhead would me nice, in case you need to add fans ... 750W, if you might add 2nd gpu/xFire

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February 21, 2010 10:42:34 PM

I changed the specified power supply to 600. Is the power supply listed above fine with that video card(5850). As i see it, its exactly the same as the other except its not 500.. but 600
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February 21, 2010 11:32:49 PM

Yeah ... that will suffice, with overhead, to spare.

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February 21, 2010 11:38:33 PM

And ... contrary to what I said before, it should be just fine when u add the 2nd gpu. Just not on the "hoogy" side ... and you do not want that.

I am going to do a similar build, but w socket 1366/920 ... I'm gonna have a single 16x slot, dual GPU card and 2 (or 3) SSds and 2 (or 3) 3.5" 2TB drives so, I might go with 750W but I could prolly get away with 600W~650W, without ever breakin' a sweat.

= Al =
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February 21, 2010 11:44:04 PM

what do you mean by overhead? silly question i know.. but im guessing it has to do with space and air flow?
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February 22, 2010 12:04:44 AM

No, more like "heat and efficiency ...

... If you do any "audio", you might have learned that most electrical components operate "best" (in several ways) when they are operated between 50% and 70% of rated max power.

PSUs are rated for PEAK and CONTINUOUS power ... Ususally seeing PEAK sometime during the boot sequence, as the "empty" capacitance of the whole system sucks up power and as any mechanical drives are spinning up. This is a really big deal (moreso, in the past), when you fire-up a huge disk-farm type storage server OR a monster 4x SLI rig which is "loaded up" with bunches of fans, which also suck 2x more power when spinning up. If you scan Wiki, on both Inductance and Capacitence, you will see the DC power curves, showing current, in the milliseconds after power is first applied. Even the coils in the PSU have a large inductive capacity (big magnetic field that must be built up from zero).

Once the mem checks are complete and all the vearious fans, coils, and drives are up to speed, well, then things smoothe out and you are at cruise level ('cept for turbo boost or O.C.)

So ... whether you are talkin' 'bout the huge sucking power drain, at power-up, or the sustained max current, during O.C.d SLI video codec transcoding renders (which can take hours or days), you would like that extra "OVERHEAD" so the PSU will be comfortable, under heavy load, and not get really hot (which degrades efficiency and "quality" of output.

Make sense? I don't turn my stereo up to "eleven" for very long ... and every stage of my audio, from the first preamps to the vol on my powered studio monitors is tweaked to about 60%~70% ... where my signal remains "cleanest" (most pure).

= Al =

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a c 135 ) Power supply
February 22, 2010 12:06:21 AM

RAM is slow, CAS 9....you can get CAS 7 for cheaper

http://www.newegg.com/Product/Product.aspx?Item=N82E168...

MoBo - USB 4 and SATA II is crippled when you add Xfire / SLI....rrad this and get an Asus

http://www.tomshardware.com/reviews/usb-3.0-performance...

The *stream series of PSU's from OCZ has not been well reviewed....if you must get an OCZ, get the Z series.

Quote:
I just did the new egg power calculater and it came up to 481W


With that number, I'd get a 650.

Antec Earthwatts EA-650 gets 9.0 at jonnyguru.com and is $74 at newegg
http://www.jonnyguru.com/modules.php?name=NDReviews&op=...
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February 22, 2010 12:29:20 AM

yeah, I think cas9 is mainly for 3 channel (cause it takes a bit longer to make a full "round" of polling all three channels ...

... Whereas 2 channel (just guessing here) just polls "back-n-forth" between two channels, making a faster mem CAS latency appropriate.

Makes sense, intuitively, anyway but, I didn't read that anywhere. I'd like to read about it , if I could figger out how to querry the Wili, properly.

= Al =
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February 22, 2010 12:30:32 AM

Wikipedia, that is.
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February 22, 2010 12:33:15 AM

I hate the Radeon series. Get a GTX 295 or sli (2) GTX 260's. You'll be in heaven! :love: 
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February 22, 2010 2:14:43 AM

I guess so ....
What I'm wondering is if cas7 works better than cas9 in a 3 chnl setup...

... Something about "wait states" (idle half-clocks, whstever) and how the mem speed synchs (ratio-wise) with the system meme clk.

I guess I should go Wiki until I have it all figgered out. Kinda fried right now.

= Al =
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!