Samsung Announces Exynos 5 Octa SoC - 4 Cortex A7s, 4 Cortex A15s
by Brian Klug on January 9, 2013 4:58 PM EST- Posted in
- Trade Shows
- Arm
- Cortex A15
- Smartphones
- Mobile
- Tablets
- exynos 5 octa
Earlier this morning Samsung announced a new eight core SoC and the spiritual successor to the Exynos 5250 "Exynos 5 Dual" called the Exynos 5 Octa (Exynos 5410?). This new SoC combines four ARM Cortex A15s and four ARM Cortex A7s, which is pretty much ARM's exact big.LITTLE reference design designed to enable either context hotplugging between the lower power, lower performance A7s and the higher power, higher performance A15s. GPU as far as I know remains a Mali T-6xx series, I'm not certain which one, however. We're now hearing that the Exynos 5 Octa may actually include an Imagination Technologies PowerVR SGX GPU - we're trying to confirm this asap. Update: It's a PowerVR SGX 544MP3.
This entire SoC is being built on Samsung's new 28nm HK-MG process, as opposed to the 32nm HK-MG process for Exynos 5 Dual and Exynos 4 successors. This half node shrink should offer a die size and space savings, but obviously not nearly as much as a full node, likely on the order of 15% based on Samsung's own diagram. No word quite yet on clocks.
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SetiroN - Wednesday, January 9, 2013 - link
no.mayankleoboy1 - Thursday, January 10, 2013 - link
not sure why 4 companion cores. Any task that uses 4 cores should be given 4 fast cores.And 90% of background tasks can be served by a single/double companion core.
teejee - Thursday, January 10, 2013 - link
Having same number of cores means that you can easily share cache between A7 and A15 parts.I assume this is the reason.
phoenix_rizzen - Thursday, January 10, 2013 - link
The way ARM's big.LITTLE architecture works requires one A7 core for each A15 core. Processes migrate from the A7 cluster to the A15 cluster in a 1:1 fashion. Doesn't mean that all 4 cores are running all the time. And the switch between core clusters happens in a fraction of a second.jerrylzy - Monday, January 28, 2013 - link
Why they didn't use 2 A7 cores and 2 A15 cores?I don't think there is any task that requires 4 A15 cores running at the same time, excluding benchmarks. It would be both performance wasting and battery drainning.
May be samsung just wanna point out the word: Octa.
phoenix_rizzen - Wednesday, February 20, 2013 - link
For a phone, a dual-core big.LITTLE setup would be optimal, IMO.For a tablet, a quad-core big.LITTLE might make sense.
Granted, I'm using an Optimus G, which has a quad-core CPU. :)
gingerboy92 - Monday, March 4, 2013 - link
it's all marketing. not much is making sense any more. i mean, 1080p? "octo" core? do we need all that?Techmister - Saturday, February 17, 2018 - link
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