Playstation 5 [PS5] [Release November 12 2020]

What about ray-tracing?

 

I don't think cache is going to do much for RT. Incoherent rays go everywhere. The BVH structure is 1.5GB in size. I know very little about how hardware RT works with respect to optimizing for hardware, and we haven't seen 6000 series RT performance yet.

I suspect the greatest consumer of that infinity cache, as Al points out, will be the ROPS.

 

PS5 is very like a small version of RX6800xt: almost the same max frequency, 16GB 256bits RAM

I don't expect 128MB infinity cache but 48MB~64MB is still likely.

 

I suppose that's possible, certainly more believable than 128mb. 1/2 the chip equating to 1/2 the cache.

I would naturally look at SoC die size to get an idea though. Considering how small the PS5 APU is, I'm not fully sold on it as being likely, but not confident enough to say it's not there.

PS5 is keeping up with XSX so far.

 

Maaaaybe. It's entirely possible they don't need to design the Infinity Cache with as much I/O as the 6800/6900 series has. Someone guessed at a 4096-bit width, but hypothetically what if they did 2048-bit while being able to increase density (less overhead I/O). Then we could look at the bandwidth per flop ratios again, which we know were skimped on starting with the midgen twins, so the cache would be designed around a bandwidth that made sense for ~10TF vs the ~20TF segment.

 

haha you know something. I'll find you on slack

 

Already redeemed mine.

 

Sony own 84% of the console market and were the most popular pre-order console in 148 out 161 monitored markets.

The largest pre-order country for the XSX was... China
The largest pre-order country for the PS5 was Japan

Source

 

Speaking of that, Cerny did say that as a consequence of the high clock, the "distance" to memory (which I interpret as latency to the memory in cycles) is 30% higher, and did not mention any counter measure.

 

AMD are working on a DLSS like technology for the PS5 -> source

 

Yes, Cerny said one of the defining features of RDNA2 was to "increase power efficiency by rearchitecting the GPU to put the data close to where it's needed, to optimize the GPU for performance".

It's at 25m20s on the road to PS5 presentation.


He too seems to point at the cache changes as the means to increase clocks.

 

That’s referring to L1 and other L0 reconfigurations.

 

PS4, PS4 Pro, RX 5700 series too!

On the topic of infinity cache:

Looks like 128mb esram is taking about ~100+mm2 on the Navi 21 die.

 

How can you put L0 and L1 caches closer to the GPU than where they actually are?

 

It's like closer-er.

 

The GPU comprises of many cores (aka CUs) and other components, it's the distance between those and the data that matters, not to the GPU die.

From RDNA Whitepaper:

 

SO you get all those games if you have a PS5 and an active PSN membership?

Oh they're probably not PS5 versions but PS4 versions which you can play in BC mode? Still a few games I still haven't played.

That's strange, they could sell remastered versions of these games no doubt.

Can you transfer PSN memberships from PS4 to PS5 or are active accounts on PS4 also active on PS5?

 

Placement makes sense. Data will move the least physically if it’s in between memory PHY and the core. The shape is also interesting. Looks like the cache makes a good gap filler to get favorable geometries and space utilization.

I don’t know if there’s enough fudge room in the known PS5 hardware and die size estimates to include any significant cache over the expected 4MB L2, though.

 

I don't find the app on Google Play. Do I have to un-install the old App before installing the new?

 

If you have a PSN membership, you are good to go on the PS5. You must just grab the titles when they become available in November and add it to your account.