Corsair RM-serie

Ltec kondensatorer i det prisläget? Nej tack, Corsair! Det var rätt längesen jag såg Ltec på moderkort och PSU, men då var de definitivt inte speciellt bra. Även om de skulle blivit bättre är det ett oprövat kort. Kina-företag från början som jag minns det.

Edit: 1290kr på Inet för RM850? Helt ovärt i mina ögon. Presterar sådär, byggt sådär. 650 hade ju japanskt rakt igenom, alltså verkar det vara ett lotteri vad man får. Panasonic är inte heller mitt förstaval eftersom jag sett svullna Panasonic på primärsidan, men som jag nog skrivit tidigare är jag inte 100% säker på att de var original och inte pirat, men såg ut som riktiga. Aldrig sett en kaputt Hitachi eller Rubycon.

Då har du ett Chicony-bygge med Ltec-kondensatorer, dvs Luminous Town Eletric Co Lmt. Hoppas att även du kommer lysa upp omgivningarna på orten du bor.

Har verkligen Corsair nedgraderat sig så genom de senaste serierna? Jag tycker det känns som så.

Satt och läste ikapp lite på jonnyguru:s forum och hittade detta inlägget från en med erfarenhet:

http://www.jonnyguru.com/forums/showpost.php?p=100895&postcou...

"I've seen plenty of Hipros with bad LTECs after a few years - even if they weren't used on the 5vsb and they weren't buried in cables. I'd be more inclined to go with the Seasonic G series."

Hela tråden är intressant, men speciellt detta med tveksamt kondensatorval i ett semipassivt nätagg som dessutom är rätt fullproppat och utan riktigt bra luftflöde.

Edit: Smaskigt:

"They just aren't great. Lot's of failures over the years from Luminous Town, and the person/group etc that "acquired" the P50 formula from Rubycon and then made it initially were at Luminous Town. When it spread from there, well not everyone got it right and the whole bad cap fiasco started. So some of it is also historical.....dislike? Or spite maybe, I don't know whatever you call that bad taste that the issue left."

Edit2: "I think what gets the Taiwanese/Chinese manufacturers these days is impure aluminium. The impurities react with the electrolyte and ultimately produce the same result (albeit slower than with a bad electrolyte as well). It might explain why I still see so many failed Teapo caps even though they supposedly source their electrolyte from Japan."

Sista Edit, men ni måste läsa hela tråden: http://www.jonnyguru.com/forums/showpost.php?p=101341&postcou...

Yes and no. Like c_hegge said, the low purity of the Taiwanese aluminum foil (with problems such as an overabundance of copper) causes the impurities to eventually "leech" into the electrolyte, cause hydrogen to form, and you know the rest. The other problem with this is that Taiwanese manufactures are not consistent with their quality at all, so they aren't predictable - there's no way to tell if they will last or not even in the proximity of ample airflow and low stress circuits. The quality of materials is not always the same. Still, I'd rate the "mediocre" Taiwanese manufactures quite a bit above the Chinese manufactures who are often known to breed lies about what's on the label, and quality wise they are quite a bit worse (and are guaranteed to fail sooner or later, with exception to brands like Aishi and Samxon for the most part). Still, if Taiwanese capacitors are failing because of raw material issues, you can bet the ripple rating is going down which means ripple suppression ability goes out the window. However, if the capacitors are kept cool enough and aren't stressed, the impurities may never leech out from the foil into the electrolyte and they may never fail.

I also believe, on the same note as c_hegge, that besides Yageo/Teapo, Jamicon (and their parent company, Kaimei) also source their electrolyte from Japan (it was even stated that they obtain it from Sanyo, sometime ago). EDIT: On second thought, that's all false information. Teapo stated that they obtain all their raw materials from Japan but I don't believe that. And Sanyo came out and confirmed that they do not supply electrolyte for low ESR Jamicon capacitors.

Given that LTEC felt the need to work with a scientist who left Rubycon, to steal an incomplete, aqueous formula from them (which became known as the P50/P51 plague), I would guess LTEC does not use Japanese electrolyte. Most series I've seen from LTEC are prone to failure, except the LZG series... I've still seen them fail but not nearly at the alarming rate that other series from them do. LZG is used often used in Delta/Newton power supplies (though it used to be more) and I know Delta/Newton know how to treat their capacitors well but even in other applications I've seen LZG do better than the other series from LTEC.

Regarding why Taiwanese capacitors are still failing, besides the aforementioned note of inconsistent quality and possibly even wilting quality, power supply designs are becoming more complex and more crowded, just like motherboards, which means less room for airflow (the capacitors are practically "blocked" from it - jet engine fans won't make that much of a difference there). Being asked to filter too much depends on what you mean. At least in older power supplies, the +5VSB circuit almost always used flyback topology which means much more ripple current through the capacitor, especially without the fan. Otherwise, it's hard to say, but the increasing power demands of electronics = more current and wattage demanded = more ripple current to filter (though a good design won't result in much ripple at all, in terms of current or voltage), to oversimplify what it means. "80+ efficient" PSUs enticing some manufactures to use finless heatsinks (*cough*FSP*cough* and worse yet CWT as stated below me) also doesn't help."

ax 860 helt klart

Det är semipassivt och håller mycket mer påkostade delar helt klart ska du köra ax

Läste det igår. Helt kass om man ser till vad Corsair tar betalt för aggen. 935kr billigast på prisjakt för ett slarvigt byggt, medelpresterande nätagg där de snålat med kondensatorerna, precis som med de dyrare i serien.

Det finns väl ett test ute på 550W där det faktiskt var UCC i, eller minns jag fel?

Det verkar som mörkret börjar lägga sig över nätaggen igen. Hoppas det inte blir som gamla tider där alla köpte Hiper, Tagan och Antec pga massiv marknadsföring, 3-5 år senare fick vi se alla stackare som fick problem pga de usla kondensatorerna.

Värmekänsliga CapXon i ett semipassivt nätagg där fläkten står still mesta tiden? Det är ju lika illa med delar av BeQuiet. Jag håller tummarna för alla köpare att CapXon gjort en 180 och helt plötsligt gör riktigt bra kondesatorer, men inget jag sett något av, tyvärr.

Edit: RM550 med enbart UCC

Konstruktionen är ok, men när man snålar för fullt med kondensatorerna i ett förhållandevis dyrt nätagg förtjänar man kritik, precis som BeQuiet. Trasiga kondensatorer är enligt min erfarenhet den absolut vanligaste orsaken till att nätdelar går sönder, både enskilda i datorer och inbyggda i TV och skärmar t ex.

Edit: Som jag skrev tidigare kan ju något unikt hänt och CapXon är jättebra numera (senaste 1-2 åren isf). Likaledes får vi hoppas att Ltec i RM750/850 också helt plötsligt har blivit bra kvalitet. Tänk på att detta är tysta nätagg som kommer gå varmare än normalt också.

JonnyGURU själv som numera jobbar för Corsair har själv sagt att de fick för stor andel primärkondensator-haverier med Taiwan/Kina-kondensatorer (troligen i CX) och att de därför gått över till japanskt där. Det om något tyder på att kvaliteten inte har blivit bättre på budgetkondesatorerna.

Gurucitat: And I'm certainly not saying Japanese caps aren't better. They certainly are. But they're also more expensive and RM series is not supposed to be an HX replacement. It's supposed to be TX level which is entry to enthusiast level. Component cost has to be a consideration.

http://www.jonnyguru.com/forums/showpost.php?p=101669&postcou...

Gurucitat: And you've never heard of primary failures? So you think that every time a PSU fails, the person opens it up to see why it failed and then posts about it in the forums? Really?? EVERY... SINGLE... FAILURE???? The reason why Corsair has put 105C Japanese primary capacitors in every single unit for the last three or four years is because they had primary cap failures. No, you can Google it all you want and won't find out about them because 99.9999999% of consumers, especially the type of consumer who is going to build with VS and CX level product, return their product under warranty instead of voiding their warranty, opening the product up and posting about it on forums. Fortunately for Corsair, they look at what's returned, why it's returned, they do a failure analysis and correct the problem. A lack of failures is why they haven't felt the need to replace the secondary capacitors in VS, CX and GS EVER because they've never received enough units back with failured secondary capacitors to justify it. And it was this same consideration, along with thermal analysis, analyzing the stress of each cap under different load conditions and different temperatures, that lead to the decision to go ahead and use CapXon, Ltec, Elite, etc.

http://www.jonnyguru.com/forums/showpost.php?p=101675&postcou...

Alltså påstår även JonnyGURU att sekundärhaverier är ovanliga, men att det händer. Till skillnad från BeQuiet som säger att det aldrig hänt de senaste 10 åren (:lol:).

Bror på hur mycet watt du måste ha eller modulärt? Du kan få bättre agg för mindre pris enligt mig kanske inte lika bra verkningsgrad då men inget du märker av på elräkningen