| 词条 | Apple A9X |
| 释义 |
| name = Apple A9X | image = Apple A9X.jpg | image_size = | caption = Apple A9X chip | produced-start = September 9, 2015 | produced-end = June 5, 2017 | slowest = 2.16 | slow-unit = GHz[1] | fastest = 2.26 | fast-unit = GHz[2] | size-from = 16 nm (TSMC)[3] | size-to = | soldby = | designfirm = Apple Inc. | manuf1 = TSMC | arch = A64, A32, T32 | microarch = Twister[4][5] ARMv8-A-compatible | code = APL1021 | numcores = 2[2] | l1cache = Per core: 64 KB instruction + 64 KB data | l2cache = 3 MB shared | l3cache = | gpu = PowerVR Series7XT GTA7850 (12 cores)[3] | application = Mobile | predecessor = Apple A8X | successor = Apple A10X | variant = Apple A9 }} The Apple A9X is a 64-bit ARM-based system on a chip (SoC) designed by Apple Inc. It first appeared in the iPad Pro, which was announced on September 9, 2015 and was released on November 11, 2015.[6] The A9X has the M9 motion coprocessor embedded in it, a new innovation not seen in previous chip generations. It is a variant of the A9 and Apple claims that it has 1.8 times the CPU performance and 2 times the GPU performance of its predecessor, the A8X.[7] DesignThe A9X features an Apple-designed 64-bit ARMv8-A dual-core CPU called "Twister".[5] It offers double the memory bandwidth and double the storage performance of the Apple A8X.[8] Unlike the A9, the A9X does not contain an L3 cache due to its significant DRAM bandwidth. The A9X is paired with 4 GB of LPDDR4 memory in the 12.9" iPad Pro and 2 GB of LPDDR4 memory in the 9.7" iPad Pro with a total bandwidth of 51.2 GB/s. This high bandwidth is necessary to feed the SoC's 12-core PowerVR 7 Series GPU.[9] The RAM is not included in the A9X package unlike its sibling, the A9. The A9X uses the same NAND interface as the A9, which uses an Apple-designed NVMe-based controller that communicates over a PCIe connection.[10] The iPad Pro's NAND design is more akin to a PC-class SSD than embedded flash memory common on mobile devices. This gives the iPad Pro a significant storage performance advantage over competitors which often use mSATA or eMMC to connect to their storage systems. Products that include the Apple A9X
See also
References1. ^9.7 inch iPad Pro includes 2 GB RAM, slightly slower CPU than 12.9 inch iPad Pro {{Apple Inc. hardware}}{{Application ARM-based chips}}{{iOS}}{{Apple Inc.}}2. ^1 {{cite web|url=http://www.anandtech.com/show/9780/taking-notes-with-ipad-pro/2|title=The A9X SoC & More To Come - The iPad Pro Preview: Taking Notes With iPad Pro |publisher=AnandTech |date=November 11, 2015 |accessdate=November 11, 2015}} 3. ^1 {{cite web|url=http://www.anandtech.com/show/9824/more-on-apples-a9x-soc |title=More on Apple’s A9X SoC |first=Ryan |last=Smith |publisher=AnandTech |date=November 30, 2015 |accessdate=November 30, 2015}} 4. ^{{cite web|url=http://www.anandtech.com/show/9662/iphone-6s-and-iphone-6s-plus-preliminary-results|title=iPhone 6s and iPhone 6s Plus Preliminary Results|author=Joshua Ho|work=anandtech.com}} 5. ^1 {{cite web|url=http://www.anandtech.com/show/9686/the-apple-iphone-6s-and-iphone-6s-plus-review/4|title=A9’s CPU: Twister - The Apple iPhone 6s and iPhone 6s Plus Review|author=Joshua Ho, Ryan Smith|work=anandtech.com}} 6. ^{{cite press release |url=https://www.apple.com/pr/library/2015/09/09Apple-Introduces-iPad-Pro-Featuring-Epic-12-9-inch-Retina-Display.html |title=Apple Introduces iPad Pro Featuring Epic 12.9-inch Retina Display |publisher=Apple |date=September 9, 2015 |accessdate=September 9, 2015}} 7. ^{{cite web |url=http://www.anandtech.com/show/9615/apple-announces-the-ipad-mini-4 |first=Brandon |last=Chester |title=Apple Announces the iPad Pro and iPad Mini 4 |publisher=AnandTech |date=September 9, 2015 |accessdate=September 9, 2015}} 8. ^{{cite web|title=Apple’s new iPad Pro is an expansive 12.9 inches, available in November|url=https://arstechnica.com/apple/2015/09/apples-new-ipad-2-pro-is-an-expansive-12-9-inches/|website=Ars Technica|accessdate=9 September 2015}} 9. ^{{cite web|title=More on Apple’s A9X SoC: 147mm2@TSMC, 12 GPU Cores, No L3 Cache|url=http://www.anandtech.com/show/9824/more-on-apples-a9x-soc|website=AnandTech|accessdate=30 November 2015}} 10. ^{{cite web|title=The Apple iPad Pro Review|url=http://www.anandtech.com/show/9766/the-apple-ipad-pro-review/6|accessdate=25 January 2016}} 3 : Apple Inc. mobile processors|ARM architecture|Computer-related introductions in 2015 |
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