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post #11 of 21
http://www.pccasegear.com/prod3420.htm mmm yes but....two of the 4 12v rails have a higher amp peak. 18,18,16,13 when running at absoulte peak...perhaps their output woud be greater upon peak? none the less an excellent power supply for the price
    
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post #12 of 21
Yes, the Silverstone 600W is good for the price. However, the revised version is better than the original, and that was my main point of my previous post. Also, you have to realize that the 600W and 650W Silverstones are NOT SLI certified for Dual GeForce 7900 GTX or Dual GeForce 7800 GTX 512 MB. Also, the Silverstone 650W is certified for Crossfire with 1800 series cards or lower. (the 600W and 560W are not... probably not tested).

The Silverstone 560W, however is certified for Dual GeForce 7900 GTX or Dual GeForce 7800 GTX 512 MB!! The main difference, and main reason why the lighter 560W version gets that certification is that the 560W has one single(!!) 12V rail of 38A max (45A peak). This is NOT an old design. Intel unofficially dropped the multiple rail standard in ATX12V and we'll see more and more well-designed single rail PSUs showing up.

Thus, for high-end SLI, the 560W version is the recommended PSU (and here in the US about $20 cheaper).
    
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post #13 of 21
wow i never knew that...so what of my 6800GS being accompanied by a second one?

can my powerstream handle them?
    
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post #14 of 21
Quote:
Originally Posted by Chozart
My post was not meant to compare the Antec NeoHE with the FSP. Sorry if it seemed like that. I just was confirming the fact that ~550W PSUs are not up to the task by stating that the Antec NeoHE is the only one in that power range to be Crossfire Certified, and that the reason is because it has exceptionally powerful 12V rails for a 550W PSU.

However, to make a fair comparison of the 12V rails, we also need to take the TOTAL available power on those 12V rail. The FSP can deliver 680W on the 3.3V, 5V, and all 12V rails. The 3.3V and 5V rails take up to 155W. Thus, in the most extreme situations, between 525W and 680W is available for the 12V rails. This translates into 43.75A and 56.67A for the combined 12V rails. The real available power likely is around 50A (depending on the draw on the 3.3V and 5V rails).

The story of the Antec is slightly different: Here, there is 504W available for the 12V rails, thus 42A. However, this can decrease when there are heavy loads on the 3.3V and 5V rails (remember, the PSU is only 550W). With a full load on the 3.3V (79.2W) and the 5V rail (100W), there is only 30.9A available for the 12V rails. Thus, I admit my information in the previous post was incomplete. A full load on the 3.3V and 12V rails will rarely occur, normally those loads are fairly light, and for all practical purposes the actual available power will be close to the posted 504W (42A).

Obviously, the FSP is the more powerful PSU.
I think that you are also forgetting that the first rail is always used soley for the First CPU. That means whatever amps are left on that rail after the first cpu/core gets its fix, you loose them.

At least I think most PSU's are this way, its what I was always told.

That's why I like the single rails and the quad rails as solutions to future power concerns.

I'm a big fan of single rails myself after doing my own research.

I really like that Mr. Zippy one.

50amps on a single 12v rail with only 4/100's volt deviation from 10amps to 50amps. WOW! http://overclockers.com/articles1313/

Think about it, a single rail is the most dynamic. You'll never be in situation where you hve to move one thing to another rail and maybe in turn you won't be able to fill up other rails to there maximum, not enough here too much there, ya know?

You're guranteed to get your full money's worth of 12v amps on a single rail and that's why I think they are the best.
One man's opinion of course.
post #15 of 21
Check here: http://www.slizone.com/object/slizon..._powersupplies

Your OCZ is certified for Crossfire. Thus you should be ok (at stock speeds). That single 33A rail should be ok for overclocking also in my opinion.

Internal: can you give me a link to that Zippy one? That sounds good to me. I also tend to prefer single rails. A lot of the multiple rail PSU's are made with inferior parts, since the max. current per rail need not to be high. With high current rails (like the newest single rail offerings) solid parts and engineering is necessary to have a working PSU. Thus, a high current single rail indicated good quality. Good research!
    
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post #16 of 21
http://overclockers.com/articles1313/

I've had my eye on this one for a couple weeks.

Anyone bought a power supply even though you didnt need it and then justify the purchase by saying its an investment for your next 2 computers?

That's how I'm feeling.
The FX700 is fav so far for the regulars.

But the "700W Zippy PSL-6701P" is server quality, no really its actually made for servers. Take a look at the zippy website.
post #17 of 21
Nice article. Please note that the Zippy PSU is rated at 45A, and that the 50A was achieved in this test. However, another unit could switch off at below 50A.

I think this might be worth looking into for my next rig.... mmmm investment for the next two computers you said eh

rep+..enjoy your flame
    
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post #18 of 21
Quote:
Originally Posted by Chozart
Nice article. Please note that the Zippy PSU is rated at 45A, and that the 50A was achieved in this test. However, another unit could switch off at below 50A.

I think this might be worth looking into for my next rig.... mmmm investment for the next two computers you said eh

rep+..enjoy your flame
THX, be aware that most of the guys that are buying these PSU's for extreme hardware rigs are swapping the stock fan out for a quiter one.
It seems as though the stock fan in most of these high end PSU's are louder then they need to be and guys are just putting in regular fans in them.
post #19 of 21
Good to know that. Since they seem to be built for servers, it does make sense. Servers are often placed in a separate room, away from users, so noise is not a concern.
    
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post #20 of 21
O wait my bad, you wanted to get a REAL single rail PSU?

OK meet the brand new Zippy:http://www.zippy.com/P_product_detai...1EPSL-6850P(G1

60amp singel 12v rail, read it and weep.
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