IMac with Retina 5K dis­play (mid 2015)

Tech Advisor - - REVIEWS -

When Ap­ple launched the first iMac with Retina dis­play last Oc­to­ber, it stood alone in terms of com­pe­ti­tion from the usual Win­dows sus­pects, since no PC maker had any­thing close in de­sign and per­for­mance.

But it was also launched as a soli­tary model in the Ap­ple cat­a­logue, listed as just one stan­dard con­fig­u­ra­tion, although there was some lim­ited scope to up­grade to bet­ter pro­ces­sor, graph­ics, stor­age and mem­ory.

Now we have an ad­di­tional offthe-shelf Retina 5K iMac with £400 shaved off the £1,999 (now re­duced to £1,849) price of the orig­i­nal. Your £1,599 can buy an iMac with the same ul­tra-high res­o­lu­tion screen and all the usual trim­mings, with sav­ings made this time in the main In­tel chip, the stor­age and graph­ics.

Build and de­sign

In ev­ery re­spect this is the same iMac with Retina 5K dis­play, us­ing the same chas­sis with the same for­mi­da­ble build qual­ity, and the same line of ports and con­nec­tors along the back. There’s two Thun­der­bolt 2 ports for high-speed pe­riph­er­als and ex­ter­nal dis­plays, four USB 3.0, gi­ga­bit eth­er­net, and slot for SD cards up to SDXC spec­i­fi­ca­tion and a head­phone jack.

In place of the 3.5GHz In­tel Core i5 quad-core pro­ces­sor is a slightly slower pro­ces­sor clocked at 3.3GHz. It’s from the same gen­er­a­tion, a Core i5-4590 in­stead of Core i5-4690. Both chips have sep­a­rate pro­ces­sor cores on the same die, and in­clude In­tel Turbo Boost 2.0 tech­nol­ogy which here mildly over­clocks up to 3.7GHz, where the faster pro­ces­sor can reach up to 3.9GHz.

These are reg­u­lar four-core chips. In both cases, the pro­ces­sor is fixed at work­ing on four threads, in con­trast to the mo­bile-class pro­ces­sors found in most vari­ants of Ap­ple MacBooks, which in­clude Hy­per Thread­ing Tech­nol­ogy to give the ef­fect of dou­bling the num­ber of real cores. The mem­ory quota and spec­i­fi­ca­tion is the same as be­fore, 8GB from two 4GB SO-DIMM mod­ules, and you can easily up­grade this your­self from a re­mov­able hatch on the back

In our tests of the main pro­ces­sor, we saw close to the same speed as from the 3.5GHz pro­ces­sor, with bench­mark scores around 5- to 6 per­cent lower.

From Geek­bench 3, the new iMac with 5K Retina scored 3699 points with one core, and 11,792 while run­ning four cores. Those fig­ures

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