Nu är det ju inte effektiviteten som är det är väsentliga. Det är ju bara något som ligger till grund för vilken klassificiering den i slutändan kommer att få. Ett mått på hur effektiv den är på att omvandla.
Det som däremot är intressant är hur de olika skenorna, 12 volt, -12 volt, 5 volt samt 3.3 volt, presterar under olika former av belastning. Vanligast att mäta detta är att belasta med 100v resp 120v för att få en bild om hur spänningsförhållandet ser ut. Ett bra nätagg ska knappt ha någon försämring på dessa värden och ska ligga så nära referensvärde som möjligt på respektiv skena. En annan viktig sak är fin DC Output quality.
Det finns tonvis med tester där ute.
angående corsair ax850
The Corsair AX850 is a good 850W power supply. Across the board it did exceptionally well with the only exception being the Transient Load Testing where the unit struggled a bit. The one problem this unit really runs into is, funny enough, the Corsair HX850. When we go down the line of features we find the HX850 to have better 12v voltage regulation by just a touch, comparable efficiency, significantly better 12v Transient Load results, etc. Where the AX850 puts distance between the two is the absolutely amazing DC Output Quality, and the noise profile. However, when we look at the absolute numbers for the DC Output Quality the 25mV peak 12v value of the HX850 is not bad, it just isn't the 10mV of the AX850, and the noise difference between these units is only really apparent at 25% load and full load. So, for users looking in the HTPC realm or the absolute balls to the walls realm the AX850 is probably a better ticket. For everyone else, it's going to come down to pricing on which of these units is a better buy which makes the maintenance of the HX line in the presence of the AX line a bit like keeping around the appendix. Rather unnecessary, a bit confusing, and on the whole something that may just get in the way of the AX series.
angående coolermaster V850 (lite längre sammanfattning för att förstå att det är en rebranded Seasonic 850 det handlar om)
The Cooler Master V850 is a really good power supply that Cooler Master has rebranded from Seasonic. While this is certainly a low risk approach, simply rebranding a known good product from Seasonic was probably a solid move to regain some of the market share and mind share that has eroded so heavily from products like its previous GX and GXII series. In the future, hopefully, we will see Cooler Master regain some more of its mojo and move beyond the simple rebranding products and move on to really giving us products that differentiate its PSUs from the competition more effectively than what we have seen from some other brands of late who have attempted to do the same.
While Cooler Master has made an excellent decision this time by rebranding a known Seasonic product for its V850 product, this is where the recommendation and praise for improvement from Cooler Master power supplies as we have seen them ends today. The V850 is an excellent product but that should not be construed as Cooler Master in general having turned a corner with its power supply products as it still offers a number of really bad products like the GX, GXII, Elite, Extreme (and variations there of), etc. So, when looking for products one could reasonably assume that the V850 and V-Series units based on the Seasonic KM3 platform are going to be good products, but there are still other Cooler Master PSU products in the channel to be wary of.
The Cooler Master V850 represents a very safe and conservative approach from Cooler Master in rebuilding its lacking power supply brand. We had nothing but good experiences with the Cooler Master V850 and it proved to be an extremely good power supply. The V850’s voltage regulation was excellent, the efficiency was excellent, the Transient Load Test results were very good, the DC output quality was good to very good, and the V850 unit was very quiet in our testing. On top that, the unit featured high quality integration and component selection.
When it comes to this unit’s pricing, we see the V850 listing at $169.99 with Prime Shipping from Amazon. However the V850 is still not in stock across etail channels yet, but soon should be. When we compare this to the Seasonic X-850, which does slightly better here and there and ends up just about tied with to slightly ahead of this unit, we see that we could have that unit today for $169.99 with Prime Shipping and get a 7 year warranty versus Cooler Master's 5 year warranty. If you were able to find the V850 unit in stock at the same price as the X-850 things would narrow considerably on which to choose for what are the best current 850W power supplies of comparable class.
angående AX1200i
Overall, the Corsair AX1200i, like the AX1200 before it, did very well in our standard load tests today. Once more, the voltage regulation was generally very good as during our load tests the 12v rail dropped by up to 0.17v and the minor rails by 0.03v which is mixed a bit better compared to the AX1200 and the Antec HCP-1200, which is over two years old now. If we look at the results posted in the 80 Plus tests, we see that the minor rail voltage regulation loosens up considerably while the 12v regulation tightens up a bit as the loads are greater on the minor rails than in our tests and the load on the 12v rail is smaller than in our tests. The one aspect that does not change is the fact that these values do trail those posted by the XFX ProSeries 1250W and those of units based on that Seasonic platform. Moving on to the efficiency, we see that this unit was 88.80% to 92.12% at 120v input and 87.93% to 91.16% at 100v input which is excellent. If we then look to the 80 Plus results, we see that the unit was not quite as excellent as it was 87.27%-92.74%-90.40% efficient using 80 Plus’s loads and conditions. This makes the unit a huge miss on the low end, and means that users are not going to likely see 80 Plus Platinum levels of efficiency, as the power range that the AX1200i missed is that which most users will see this power supply operating at the majority of the time. For an otherwise very promising start, this was a big misstep. Lastly, the unit did indeed pass the Torture Test and that was certainly good to see, though the exhaust was getting warm at 74C just as it did at full load at 100v AC input.
Moving over to the Transient Load Testing results for the AX1200i, we find that the results are passing but not exactly good and headed in the wrong direction compared to the AX1200. The peak change we saw on the 12v rail of the AX1200i when it was directly loaded increased from what we saw with the AX1200 to hit ~400mV. When we look at the peak change when the 5v rail is loaded, we see that it hits ~120mV. This actually represents the only part where this unit did better than the previous AX1200 as when we look at the peak change on the 5v rail when the 12v rail was loaded it hit ~110mV, which is much worse than before. All in all, falling behind the AX1200 on 2 out of 3 parts when the AX1200 was not impressive before is another serious misstep for this unit. Sure it might be OK compared to some other products in these tests, but it is doing worse than the two year old unit it is replacing so that is a big negative.
Jag säger inte att corsair AX eller AXi är dåliga nätagg. Jag säger bara att det finns ett alternativ med bättre värden.
