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Along with a spectacular display, the 21.5" Retina 4K iMac has some new age specs:
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3.1 GHz quad-core Intel Core i5-5675R (Turbo Boost up to 3.6 GHz)
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8 GB of 1867 MHz LPDDR3 RAM
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Intel Iris Pro Graphics 6200
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1 TB (5400-rpm) hard drive, configurable up to 2 TB Fusion Drive or 512 GB of flash storage.
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802.11ac Wi-Fi + Bluetooth 4.0
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Shiny new EMC number, 2833 (same ol' model number A1418)
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This new display (first image) packs quite a punch, especially compared to the non-Retina iMac (second image). The difference is like pixelated night and seamless day.
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We got up-close and personal with the a few of the (over 9 million) pixels in the 4K IPS display. Each is made up of a red, green, and blue strip—vary those and you get a colored pixel.
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This 4,096 x 2,304 pixel display packs more than 4.5 times the number of pixels in a standard 21.5" iMac display.
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Bu adımda kullanılan alet:iMac Opening Wheel$7.99-
Double the opening tool, double the opening speed! We've done so many of these we figure we gotta step our game up a bit.
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The display cable is now slightly wider to support all those extras pixels. 16.4 mm over the 12.4 mm of the non-Retina 21.5".
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We also note a new rubber bumper stuck to the fan's top screw—likely to provide a little extra support for all those heavy new pixels.
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Unlike other iMacs, this one's packing a DCI-P3 display—one of the first available to consumers—so we're quick to dispatch this shiny metal cover so obviously concealing some delicious chips.
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Like its siblings, this 4K display has some control hardware tucked away behind the front panel:
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Texas Instruments TPS65168 High Resolution, Fully Programmable LCD Bias
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Texas Instruments TPS54320 4.5 V to 17 V Input, 3 A Synchronous Step-Down SWIFT Converter
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Texas Instruments TPS54218 4.5 V to 17 V Input, 3 A Synchronous Step-Down SWIFT Converter
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Parade Technologies DP665 LCD Timing Controller (the same found in last generation's 27" 5K model)
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Texas Instruments NH245 55K G4
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Texas Instruments BUF16821 Programmable Gamma-Voltage Generator and Vcom Calibrator
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Turning our attention to the interior of the iMac, we find exactly what you would have found in last year's 21.5" iMac—how dull.
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As usual, Apple sticks to its guns on its hard drive, fan, and speakers—retaining their designs between generations.
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Apple is back to their old ways: In 2012, when Apple launched the thin-edged iMac, our base-level iMac had empty solder pads where a Fusion Drive's SSD slot might live.
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The following year, our teardown unit arrived with an empty slot, ripe for the upgrade.
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The curved heatsink is a bit beefier than we saw earlier this week, and a return to the 2013 design; perhaps helping that new Broadwell CPU find cooler pastures.
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This little machine has plenty of brawn, but we're itching to check out its brains too:
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Intel SR2AJ Core i5-5675R 3.1 GHz Processor (4M Cache, TurboBoost up to 3.60 GHz) with Intel Iris Pro Graphics 6200
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Samsung K4E6E304EE-EGCF 16 Gb LPDDR3 1867 MHz SDRAM (4 chips for a total of 8 GB)
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Broadcom BCM5776 Gigabit Ethernet Controller
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Texas Instruments LM4FS1EH SMC
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Texas Instruments HD3SS213 5.4Gbps DisplayPort 1.2a 2:1/1:2 Differential Switch
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Fairchild FDMF6808N Extra-Small, High-Performance, High-Frequency DrMOS Module (presumably a new iteration of FDMF6708N)
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iMac Intel 21.5" Retina 4K Display Repairability Score: 1 out of 10 (10 is easiest to repair)
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Cutting the tape to open the iMac isn't too hard (with the right tools), but it must then be replaced to complete any repair.
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The RAM is still soldered to the logic board—you're stuck with what you bought.
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The Fusion Drive connector is missing from the logic board, killing all hope of storage hacking.
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The CPU is soldered to the logic board, and cannot be replaced or upgraded.
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The glass and Retina Display are fused together, increasing the cost of replacement.
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26 Yorum
Imac uses HM97
Help me clarify: If I get any of the fusion drive models, could I upgrade both the HD and the flash module?
Yes. According to the teardown, both are removable. Ordering a model that comes with an SSD would, of course, include the SSD connector that is missing in the standard HDD models.
Nate -
The hard drive, yes. The Solid State Drive, I’m not so sure. As far as I know, Apple uses a proprietary NVMe connector for its Solid State Drives, though OWC carries drives which use Apple’s proprietary connector, but they’re expensive, costing $400 for a 480 gigabyte Solid State Drive and $650 for a terabyte Solid State Drive.