Which PSU for $200?

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Originally Posted by EsaT

Sorry to shoot you down but I checked specs of this "mighty" Zippy and that PSU would be classified as low safety product here in Finland and importer/seller would be requested to withdraw product from sale and refund moneys for those returning PSU.

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DIELECTRIC WITHSTANDING VOLTAGE：PRIMARY TO SECONDARY 1800VAC FOR 1 SEC, PRIMARY TO FG：1800VAC FOR 1 SEC.
http://www.zippy.com.tw/P_PRODUCT_LI...wer&lv_rfnbr=2]

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Requirement is 3000Vac/1min.

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Am I seeing things wrong or are you? I don't know but Zippy states that thier powersupply will withstand 1800VAC/s and in Finland it is at least required to withstand 3000VAC/min to be called safe. But and it's a big BUT, isn't there a major difference between 1800VAC PER 1 SEC and 3000VAC PER 1 MIN? Sort of in the same way as 10m/s being a higher velocity as 18km/u? I don't know if, for powersupply safety testing, you will be able to convert 1800VAC/s to 108000VAC/min, most probably not, but it does mean that this 1800VAC/s figure of Zippy is different measure then what this Finish standard measures. If you take this into account, then it sure makes it more viable for Zippy PSUs to pass the safety tests. But as I already said, I could be wrong on this one.

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Originally Posted by Helmore

But and it's a big BUT, isn't there a major difference between 1800VAC PER 1 SEC and 3000VAC PER 1 MIN? Sort of in the same way as 10m/s being a higher velocity as 18km/u?

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Not really, if insulator is strong enough to resist strike-through for seconds (long time for electrical components) then it propably won't happen in longer time in case of this small times like minutes, unless leakage current (technically even insulators leak little current, their resistance isn't infinite) stresses insulator in some way. Strike-through happens when voltage is high enough to break electrons free from atoms and resistance drops like stone, quite much like in varistors/VDRs which are used in good PSUs for protecting them against line voltage spikes.
10m/s=36 km/h, four times the kinetic energy (which is like voltage) than in case of 18km/h.


I've myself sent inquiry to them about that part of tests.
Strike-through in that test isn't mentioned in most significant deficiencies with others PSUs in database, but there's some power adapters (Celly brand), one with failure at 1500Vac, other with 2900Vac failure and strike-through between PCB traces at 1900Vac with awfully long list of other flaws, including fire safety.

Review of the M12 700w! Performance looks sweet
http://www.jonnyguru.com/PSU/M12-700/

Looks like a top-notch performer.

The real question is: would it be worth the extra $40 to get this over the Corsair 620HX?

If you plan on having a CF or SLI setup with DX10 cards, then get the M12-700, though I'm not really sure if it'll be enough power for two DX10 cards... but my gut feeling says yes, but my brain says no no... but really its up to you.

Well I don't really plan on going SLI or CF, especially with the first gen of DX10 cards and the ungodly amounts of heat they're supposed to dump.

So the 620HX should be fine?

Yes sir.

Sounds good, looks like that'll be my next purchase. :)

I dunno, but I'm very happy with my Thermaltake 700W unit, which is pretty much the same exact thing as the 750W (same internals, etc):

http://www.jonnyguru.com/PSU/Toughpower750W/

it got huge marks across the board, and if it wasn't for the 6.5 "eastetics" score, it still got a 9!

:confused:

here she is in action:
http://upshizzle.com/gallery/albums/...6300%20003.jpg

Sorry to revive a semi-old thread, but I have to ask. Of these two PSU's, which one would you choose?

Silverstone Strider ST75F - $140 ($152 incl. shipping)
http://www.case-mod.com/store/silver...ly-p-2027.html

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Originally Posted by jonnyGURU

Anyhoo... The Silverstone ST70F I'm currently playing with is giving me warm fuzzies. Enhance built, seems to be good (although not the best) quality, strong regulation, decent efficiency (81% typical,) almost no ripple (although the 5V kisses the 50mV mark,) modular... and the Type K thermometer was not affected by it! :D

At $200, it's not TOO expensive, right?

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Corsair 620HX - $165 (Free shipping)
http://www.zipzoomfly.com/jsp/Produc...uctCode=373110

I'm leaning towards the ST75F, due to the price and jG's extremely kind words towards it. Which of these two would you choose? Or if you would pick something else for <$175, which is modular, quiet, and powerful enough for DX10, offer up your suggestions.