90D. Well that’s disappointing for us 7D2 users

Started 2 months ago | Discussions thread
RLight Senior Member • Posts: 1,352
DIGIC8 is multicore?
2

IR1234 wrote:

Sharlin wrote:

IR1234 wrote:

So specs don’t seem to show dual cards or dual DIGIC, so the 90D isnt any sort of 7D2/80D compromise. It’s just an updated 80D.

What would they need dual processors for if one DiGIC 8 can do 32MPix @ 10fps? Sensor readout speed is almost certainly a bottleneck at such extreme throughput that out of all Canon cameras only the 1DX 2 has achieved previously! The throughput of the 7D2, with its dual processors, is just 200 Mpix/s. In real-world engineering you can't just make one part of a system faster and expect the whole thing to speed up.

Dual processors is more than MP throughput. If you take our 6d2 into the field where we usually have the 7d2 or 7d, you can feel the af very slightly start to bog down as the processor gets busy shuffling data around. The UI takes a real hit when the camera is busy, even just changing a Q setting let alone image review. The camera just does not have the same snappy feeling the 7d or 7d2 has.

Dual processors also handle things like secondary card resizing, eg L on cf, and S1 on sd, absolutely flawlessly.

Just some food for thought... After playing with two DIGIC8 Canon's now (M50 and EOS R), I'm pretty sure they're multicore. Why? Responsiveness of the camera while it's writing out or AF'ing, etc. You can't get that with just more speed (ghz) and properly using nice values on an OS implementation level. Well, usually anyways.

I noted it was a HUGE jump vs DIGIC7 and before.

Odds are DIGIC8, and newer chips, like smartphone CPUs these days are at least dual core, if not more.

You used two CPUs back in the day on big server rigs because of the need to do it in the same way 1DX models and 7D II etc have. Multicore CPU implementations have (largely) obsoleted this for consumer use.

Think about it for a minute. New DIGIC8 Canon's have the new live sync to your smartphone mode. On mirrorless (like the M50 and R), they have to handle both the presentation of your data on an LCD/EVF (which isn't a problem on an OVF DSLR as that's all old school no electronic presentation, merely AF overlay) and AF calculations, image capture and compression, metering, etc etc etc.

IMO, DIGIC8 is multicore. The data throughput (14x32MP==448mp/sec) also says they didn't just double the ghz somehow (as that's hard to do)... That tells me DIGIC8 is probably a dual core chip (1DX II does like what, 16*20/2=160mp/sec per core) as it's got a slightly higher effective mp/sec which per core if it has two at around 224mp/sec per core if two cores... They didn't just get double the data rate out of thin air.

Make sense?

So yes, dual processors can make a big difference on these cameras when you push them. And we push them.

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