ComputerBase
Date: 30.04.2013 23:11
Much excitement, little substance
Haswell with new demands on power supplies
According to a report from VR-Zone about new requirements of Intel's upcoming CPU generation Haswell many details are still unclear. However, many current power supplies already meet the requirements now circulated.
While numerous media fear that for Haswell systems or the new C6/C7-Energiesparmodi adapted, possibly specially certified power supplies would be needed, there is currently no reliable evidence for it. VR-Zone assumes that power supplies for the future platform even at 0.05 ampere rating instead of 0.5 amps on the +12 volt secondary line must deliver stable voltages. However, this does not mean new requirement that current power supplies Haswell systems can not provide.
First, according to Robert Pearce from Corsair compared to The Tech Report, it is assumed that the new energy saving modes will be optional and the motherboard can be disabled with problems in the BIOS / UEFI. Secondly, very few brands power supplies will be affected by stability problems in the opinion of some industry insiders at our request:
1 Unlike communicated by Intel and many magazines, the assignment of the second +12 V lines is not solely a matter of course for P4/P8-CPU-Anschluss. In many current power supplies is chosen a different distribution, so that in addition to the processor and other components from the second 12-volt line will be supplied. In this case, it is quite possible that all of these devices track even in idle mode together achieve the 0.5 amp limit. Instead of a 0.05-amp lower limit for the secondary 12-volt line is in fact a minimum load on a single plug.
2 All known DC-DC power supplies work absolutely fine without load on the +12 V rail. This - some selling for several years - now the products meet unofficially discussed innovations.
3 For all single-rail power supplies, there are basically only a common +12 V lines for all connections. The problem is that the load only one rail is too low, therefore can not occur due to technical reasons.
4 Overall, the feared compatibility problem may even merely academic. All we know currently offered multi-rail power supplies have only isolated secure lines, but which are fed from the same transformer. What +12- volt line is actually charged is irrelevant at low loads. Power supplies with separate power generation per track actually are no longer manufactured for years for reasons of cost, so that all market-relevant devices behave with respect to this portion of the specification analogous to a single-rail power supply.
If the changes to the requirements for the power supply to meet present reports, almost all power supplies will also be suitable for Haswell systems. Should the change, however, affect more in the form of a particularly low overall power consumption on all +12 volt lines, most existing power supplies will also get along well with it. The often expressed fear that in newly formed Haswell computers or upgrade to the new platform-specific generation costs for power supplies would schedule appears very rarely apply at least to the facts currently available.
Some manufacturers have also been given official assurances compatibility for their products. In previous statements to restrict the release of DC-DC power supplies. Enermax certifies its Revolution Series 85 +, 87 +, Pro / Modu 87 +, MaxRevo, Platimax, Triathlor FC and Triathlor (from 385 watts) smooth function. Sea Sonic confirmed on request from the computer base compatibility of G-Series, X-Series and Platinum Series, Antec High Current Pro can of Platinum, True Power Gold, and Platinum EarthWatts High Current Gamer M. Corsair so far, the GS series, TX, HX, AX and AXi release. Currently, the development departments working on the review of other product lines.
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