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PS5 CPU actually slower than expected (ryzen 4700s review)

Grim5

Grim5

Grim5

Soldato
Joined
6 Feb 2019
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I don't know if this is disappointing or impressive given the games on the system.

people are starting to get their hands on AMD's left over PS5 chips that they they're selling. The reason these chips weren't used to make a ps5 is because the GPU part of the SoC failed validation but the CPU passed 100% - so it can't be used for a ps5 because it doesn't meet the minimum Gpu performance.

Testing shows that the ps5 CPU is about on par with a ryzen 2700x (though in some tests it falls 5% behind the 2700x) . Even though on paper it looks like a 3700x with just a bit lower clocks, the clocks are low enough to drag it's performance down a whole generation.

https://www.hardwareluxx.de/index.p...-ryzen-4700s-desktop-kit-im-test.html?start=2
 
Grim5 said:
I don't know if this is disappointing or impressive given the games on the system.

people are starting to get their hands on AMD's left over PS5 chips that they they're selling. The reason these chips weren't used to make a ps5 is because the GPU part of the SoC failed validation but the CPU passed 100% - so it can't be used for a ps5 because it doesn't meet the minimum Gpu performance.

Testing shows that the ps5 CPU is about on par with a ryzen 2700x (though in some tests it falls 5% behind the 2700x) . Even though on paper it looks like a 3700x with just a bit lower clocks, the clocks are low enough to drag it's performance down a whole generation.

https://www.hardwareluxx.de/index.p...-ryzen-4700s-desktop-kit-im-test.html?start=2
Click to expand...

We don't actually know whether these parts actually failed on the GPU part. GPU parts of a SOC or APU tend to be designed with good redundancy.

These parts may have failed binning. Remember rumors before launch was that Sony increased the clocks later in the design; and AMD foolishly agreed hence the PS5 using up so many TSMC wafers.

The GPU may be fused off because AMD are not allowed to sell it because it contains some Sony IP.

Also, didn't one or both of the consoles take Zen 2 but leave off some AVX or FPU?
 
Grim5 said:
I don't know if this is disappointing or impressive given the games on the system.

people are starting to get their hands on AMD's left over PS5 chips that they they're selling. The reason these chips weren't used to make a ps5 is because the GPU part of the SoC failed validation but the CPU passed 100% - so it can't be used for a ps5 because it doesn't meet the minimum Gpu performance.

Testing shows that the ps5 CPU is about on par with a ryzen 2700x (though in some tests it falls 5% behind the 2700x) . Even though on paper it looks like a 3700x with just a bit lower clocks, the clocks are low enough to drag it's performance down a whole generation.

https://www.hardwareluxx.de/index.p...-ryzen-4700s-desktop-kit-im-test.html?start=2
Click to expand...

This is a pointless statement. Suggests to me it performs just as expected. Zen 2 chip at 3.5ghz.

edit:

Reading the article it also sounds like this desktop kit is dodgy. Crazy high idle power consumption and even very high load consumption even though its a low power chip.
 
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Grim5 said:
it's a review of what is now a PC cpu so right forum

they even look identical https://mobile.twitter.com/aschilling/status/1410917697609781255?ref_src=twsrc^tfw|twcamp^tweetembed|twterm^1410917697609781255|twgr^|twcon^s1_&ref_url=https://www.tweaktown.com/news/80391/amd-4700s-desktop-kit-is-really-playstation-5-soc-without-the-gpu/index.html
Click to expand...
Cyber-Mav said:
isnt ps5 supposed to use zen2 but with half the cache? and cache is big reason for gaming speed on zen.
Click to expand...

I'm pretty sure they said Zen3, if it was Zen 2 it should be much slower than the 2700x instead of matching it because it's running significantly lower clocks thanbthe 2700x
 
Grim5 said:
I don't know if this is disappointing or impressive given the games on the system.

people are starting to get their hands on AMD's left over PS5 chips that they they're selling. The reason these chips weren't used to make a ps5 is because the GPU part of the SoC failed validation but the CPU passed 100% - so it can't be used for a ps5 because it doesn't meet the minimum Gpu performance.

Testing shows that the ps5 CPU is about on par with a ryzen 2700x (though in some tests it falls 5% behind the 2700x) . Even though on paper it looks like a 3700x with just a bit lower clocks, the clocks are low enough to drag it's performance down a whole generation.

https://www.hardwareluxx.de/index.p...-ryzen-4700s-desktop-kit-im-test.html?start=2
Click to expand...
How is it slower than expected? You would expect a lower clocked Zen 2 chip to perform worse than an equivalent higher clocked desktop chip. Also that link is comparing cinebench scores, so if it's only 5% behind the 2700x then it should still destroy it in gaming performance.
 
The latency of GDDR6 will hurt performance in a Windows desktop environment. The 4700S is probably punching above it’s weight TBF.
 
It doesn't really need to be as powerful as the latest PC CPU because the architecture itself and programming on consoles is far more efficient, the previous generation had an 8-core AMD Jaguar which is an absolutely horrible CPU for gaming on the PC, far worse IPC than the Bulldozer architecture even.

The gap between the hardware on consoles and PC has never been as close as it is this generation and in some aspects (unified memory, the bus between CPU and GPU) the consoles are now superior.
 
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mmj_uk said:
It doesn't really need to be as powerful as the latest PC CPU because the architecture itself and programming on consoles is far more efficient, the previous generation had an 8-core AMD Jaguar which is an absolutely horrible CPU for gaming on the PC, far worse IPC than the Bulldozer architecture even.

The gap between the hardware on consoles and PC has never been as close as it is this generation and in some aspects (unified memory, the bus between CPU and CPU) the cosoles are superior.
Click to expand...

Yeah, the console guys are drinking our juice for free… while we pay through the nose for the privilege.
 
I guess this is interesting to some however I am really happy with the PS5, leagues ahead of the PS4 and PS4 Pro I had to endure for 7 years. So far it seems to compare very well with my rx6800 and 3700X and I bet it only improves as time goes on.

Also less overhead due to running a redhat based distro
 
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Grim5 said:
I'm pretty sure they said Zen3, if it was Zen 2 it should be much slower than the 2700x instead of matching it because it's running significantly lower clocks thanbthe 2700x
Click to expand...

2700x is Zen+ not Zen 2. Zen 2 is a faster architecture than Zen 2

As an example here is my 65w Zen+ 3400 APU up against my 35w Zen 2 4300 APU which has lower clocks, with the same motherboard and RAM.

https://browser.geekbench.com/v5/cpu/compare/7193081?baseline=6738449

Its no surprise what the console can achieve with this CPU, look what the PS4 etc achieved with something akin to an Atom cpu.
 
Cyber-Mav said:
isnt ps5 supposed to use zen2 but with half the cache? and cache is big reason for gaming speed on zen.
Click to expand...

The SoC in both the the PS5 and Series consoles are using what is more akin to Zen 2 mobile CPU's (47xx being 8c/16t) with clocks from memory (and a quick google) in the 3.5 -3.8Ghz range depending on console (lists as 3.5Ghz variable for the PS5) - lower clocks when using SMT.

Somewhat older article but lists the confirmed specs:

https://www.eurogamer.net/articles/...s-and-tech-that-deliver-sonys-next-gen-vision
 
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