REDHOTIRON2004
Journeyman
That's a very good question you have raised for which there's no correct answer. Nowadays PSU manufacturers first introduces a model, send it for review and when there's some good review floats around and they make some good sell they just silently changes some internal components to cut cost. Thus we get some lower quality psus which were higher of quality before. Often such psus gets a new revision number and often does not. Now which PSU manufacturer will do such act for which PSU models is mighty hard to tell.
On the plus side a new revision generally corrects the flaws of the previous revision and adds some little improvements. As a rule of thumb getting a higher model of a decent PSU manufacturer is always the safest bet or try to look for the OEM of a psu modem. If it's from a good OEM the build quality is also going to be nice. Another way is to look for feedback about a particular PSU of different forums if you have doubts.
Ok, actually there are two major difference between v1 and v2 that I have been able to get after searching and reading every bit of information that I got my hands on. I will sum that up here.
1. The v2 version is haswell compatiable while v1 is not.
2. The v2 version have 444 watts on 12volt rail instead of 540 watts on v1. Everything else is supposed to be same according to specs.
These are major differences. So, I am pretty sure that delta electronics(OEM manufacturer for both) must have made some significant changes). After going through a review of antec vp550f. I came to realize that it's more similar to the newer vp550p v2 version as they both have 444watts on 12 volt rail.
Now, I will put some opinions that I got after reading there reviews. Antec vp550p v1 had Japanese caps all over except primary samaxon which was rated higher at 450volts instead of 380volts. This had bad lower watt efficiency. But performed nicely at loads with consistent above 80% efficiency. It have some fan noice issue (40db) at higher loads.
Vp550f have a mix of caps. Had good lower watts efficiency. But was not as good as vp550p v1 when it comes to full load situation.
Now, from those reviews I think that maybe vp550p v2 won't be having better caps than v1. But, definitely a better lower efficiency as its haswell compatiable. Also, I expect the fan problem to have been solved at higher loads(although, I couldn't find any reference to that)
I would like any other user or member to add his comments on this v2 version.
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