Along with the Apple's iPad come up in June, There are hundreds of similar android tablet PC is showing on the market. How to choose a suitable own android tablet PC? Let’s find about most important component, processor of android tablet PC.
There are simple under various specifications of the chips summary to help us to choose a android tablet pc as reference.
ARM9 series
The Classic ARM9 Core, the smaller the core area bring lower cost and provide about 1.1 DMIPS/MHz performance. Relatively omit report, but difficult to impact higher frequency, so the overall efficiency is limited
1. VIA 8505 / 8505+
65nm process
ARM926E 300MHz / 400MHz,
Linpack 1-125 MFlops (Android 1.6 OS)
RAM: 256MB-16bit
Personal Review:
1: Low price is probably the only advantages to this scheme
2: ARM9 300MHz, not have good performance, Internet are only just so so.
3: The 400MHz version, littlebanyan fever and bigger, performance improvements and so limited.
4: Video ability is very weak, suitable for some Android introductory machine for fun.
Performance: ★★☆☆☆
2. Rockchips RK2808
65nm process
ARM926E 600MHz, Linpack 2-2.5 MFlops (1.5 system)
RAM: 128MB - 32bit
Video subsystems: Ceva MM2000, based on 550MHz DSP
Many format, RV, h.264, VC - 1, h. 263, 720p, fluent 576p MPEG4 highest
No 3D accelerated
Personal Review:
1. RK2808 is latest product in tablet pc, performance weak, fortunately system optimization are doing well, Android 1.5 OS or do sound and stable, actual pace was good.
2: The speed for suffering online is acceptable, meet text-based page no problems, yet for more pictures web pages, drag will have obvious not fluent.
3: RK2808 with independent video performance DSP, thus gained significant improvement, support format is relatively rich.
4: RK2808 the weakness of using SDRAM, the biggest can support 128MB to more than 2.0 system, RAM become a bottleneck. In addition, also lack of 3D accelerated doomed and 2.1 above the dynamic desktop effects and luxuriant, nor to run for using 3D accelerated game.
Performance: ★★☆☆☆
3. Rockchips RK2818
65nm process
ARM926E 660MHz, Linpack 3MFlops + (Andorid 2.1 OS)
RAM: 256M DDR2, 32bit
Video subsystems: Ceva MM2000, based on 600MHz DSP
Many format, RV, h.264, VC - 1, h. 263, MPEG4 highest 720p
3D accelerated: ARM Mali - 55
Architecture: TBR, only PS part, through the software vertex processing by the ARM realization
Properties: ES1.1, OPENVG OPENGL
Triangle productivity: 1-m
Pixel filling rate: 100M
Personal Review:
1: RK2818 improved the memory controller, support, the largest DDR2 particles to 512MB, but also increase the 3D accelerated. Because Rockchips last year had been authorized the ARM Mali - 55 graphic core, comprehensive consideration of the ARM9 framework, and no accident words integrated graphics core is Mali - 55.
2: For Mali - 55 as a single entry-level graphic core, use some UI effects no problems, ordinary 3D game should also to be performed. But can not support some 3D sub-editor, especially Gameloft some works of, need GLES 2.0
3: In addition, because the product has not officially listed, ARM and DSP part frequency can have certain ascend, other specifications have change is not very clearly.
4: Video abilities may have ascension, but is not expected to exceed 720p. In addition, if they have further development such as 3D video, face recognition, and other functions, for product increase selling point. It will be better.
Performance: ★★★☆☆
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ARM11 series
ARM11 core also classic which provide about 120 DMIPS/MHz performance. Extended pipeline could impact higher frequency (1GHz), but meanwhile power consumption is also significantly increased.
1. Telechips TCC8902
65nm process
ARM1176JZF - S 540MHz / 720MHz, Linpack 2.3/3.5 MFlops (Android 2.1 OS)
RAM: 256M DDR2, 32bit
Mali - video subsystems: the ARM VE6, based on hard solution
Many format, RV, h.264, VC - 1, h. 263, MPEG4 highest 1080p, 1080p fluent.
3D accelerated: Mali - 200 ARM
Architecture: TBR, PS + VS
Properties: OPENGL ES2.0/1.1, OPENVG
Triangle productivity: dedicated 16M
Pixel filling rate: 275M
Personal Review:
1: Now it is one of the most android OS of the tablet pc. Performance is also mainstream level, enough to handle the most applications.
2: But ARM11 processing power still not enough to support the complex web pages with pictures, drag is not fluent.
3:TCC8902 with a single compare strong 3D accelerator, therefore it can support all sorts of dynamic 3D UI.
4: Video ability, supports multiple formats of 1080p, also can truly 1080p fluent.
Performance: ★★★☆☆
2. Infomix IMAPX200
65nm process
ARM1176JZF - S 1GHz, Linpack ~ 9.8 MFlops (Android 2.1 OS, open JIT estimated at 4-4.5)
RAM: 256M DDR2, 32bit
Video subsystems: Hantro On2 8190, hardware solutions
Many format, RV, h.264, VC - 1, h. 263, MPEG4, VP6 highest 1080p
3D accelerated: VIVANTE GC600
Architecture: IMR, unified rendering
Properties: OPENGL ES2.0/1.1, OPENVG
Triangle productivity: 19M
Pixel filling rate: 375M
Personal Review:
1: The solution of video is quite high, but it's said that there are still 1080p off frames, estimate software optimizing enough.
2: VIVANTE 3D accelerator is also pretty much, if it can keep up with the driver.
3: From the chips' point of view, the hardware specifications or quite powerful, but out of late, software many are not mature, didn't keep up.
4: Another said chip consumption so great, so small and medium size not do.
Performance: ★★★☆☆
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Cortex - A8 series
The double launching sequence structure of ARM first superscalar CPU, bring 2.0 DMIPS / MHz efficiency.
1: Generally the L2 cache with 256KB, plus 600MHz - 1GHz high frequency, relative ARM9 and ARM11 has markedly improved.
2: Cortex-A8 Neon units, through with standard SIMD instruction set greatly enhance the floating-point performance, can realize the function of many DSP.
3: Meanwhile, relatively high authorized expenses and larger core area, make Cortex-A8 SOC cost relatively high, high end products appear as positioning.
1. Freescale iM X515
65nm process
1GHz 800MHz/Cortex - A8
RAM: 256 / 512MB DDR2, 32bit
Video subsystems: hard solution
Many format, h.264, VC - 1, MPEG4, RV highest 720p
Through software decoder can grudging support side more format fluent
3D accelerated: Adreno 200 (AMD) Z430
Architecture: IMR, unified rendering architecture
Properties: OPENGL ES2.0/1.1, OPENVG
Triangle productivity: 27M (frequency than qualcomm high)
Pixel filling rate: 166M
Personal Review:
1: It is very famous in these days, but a slow out machine (so dubbed "freescale selling their forever cannot buy chip")
2: But according to latest news, October domestic vendors carry Android 2.2 OS iM X515 flat can finally listed.
3: 3D part and QSD8x50 is same, but frequency is to ascend, besides using DDR2 memory, gain greater bandwidth, 3D accelerated performance will have the further promotion.
4: Video part is said to be realized through a stream processor, supports multiple formats 720p decoding, even support WMV7, WMV8 etc unpopular format, be worth to expect.
Performance: ★★★★☆
2. Texas instruments OMAP3630/3640
45nm process
1GHz 800MHz/Cortex - A8
RAM: mDDR2, 512M 32bit
Video subsystems: IVA2 +, based on C64x + DSP, 430MHz
Many format, but`` aikeshi ``, many vendors to remove love never done decoding
Through software decoder can grudging support side more format fluent
3D accelerated: PowerVR SGX530
Architecture: TBR, unified rendering architecture
Properties: OPENGL ES2.0/1.1, OPENVG
Triangle productivity: 14M
Pixel filling rate: 280M
Personal Review:
1: This chip basic is the OMAP3430 45nm version, not much improvement, but the 3D performance reached OMAP3430 twice.
Performance: ★★★★★
Cortex - A9
1:The new generation of Cortex - A9 core in the basis of Cortex - A8 have been improved, is also superscalar structure, disorderly sequence double launch, effectiveness ascent to 2.5 DMIPS/MHz. Moreover widespread use semmetry dual core configuration, two same core sharing 1MB of L2 cache, overall performance achieved Cortex - A8 of more than two times, performance is very strong.
At last, I believe, the chips of Cortex - A9 architecture will become future tablet PC mainstream, but such chips still needs engineers spend a long time to perfect it.
Remember: For the products not the more expensive the better .choose the products you want or suitable for you to use.
Find the Tablet PC for you, please visit this website:
http://www.digitbuying.com
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