Monday, July 5th 2021

AMD 4700S Desktop Kit Features PlayStation 5 SoC Without iGPU

Previously, we have assumed that AMD 4700S desktop kit is based on Xbox Series X APU. Today, according to the findings of Bodnara, who managed to access one of these units, and we got some interesting discoveries. The chip powering the system is actually the PlayStation 5 SoC, which features AMD Zen 2 based system architecture, with 8 cores and 16 threads that can boost up to 3.2 GHz. The board that was tested features SK Hynix GDDR6 memory running at 14 Gbps, placed on the backside of the board. The APU is attached to AMD A77E Fusion Controller Hub (FCH), which was the one powering Xbox One "Durango" SoC, leading us to previously believe that the AMD 4700S is derived from an Xbox Series X system.

The graphics of this APU are disabled, however, it was the same variant of RDNA 2 GPU used by the PlayStation 5. Right out of the box, the system is equipped with a discrete GPU coming in a form of the Radeon 550, and this configuration was tested by the Bodnara team. You can find the images of the system and some performance results below.
Performance:

Sources: Bodnara, via VideoCardz
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33 Comments on AMD 4700S Desktop Kit Features PlayStation 5 SoC Without iGPU

#26
eidairaman1
The Exiled Airman
Drop a card in problem solved...
Posted on Reply
#27
Mussels
Freshwater Moderator
eidairaman1Drop a card in problem solved...
you missed the previous news post, where it was found to be PCI-E 2.0 x4
Posted on Reply
#28
80251
Was the decision to make the one PCIe slot PCIe2.0 x 4 a hardware constraint or a marketeering decision (i.e. to nerf performance with any mid-range or higher discrete GPU's)?
Posted on Reply
#29
WhitetailAni
So it's mostly useless because no iGPU and only a PCIe 2.0 x4 link.

Good one, AMD.
Posted on Reply
#30
Aquinus
Resident Wat-man
JismThere's however a high latency penalty by using GDDR6 vs DDR4.
Bandwidth, not latency. GDDR variants have a focus on bursting large sets of data as opposed to having more random access characteristics.
Posted on Reply
#32
eidairaman1
The Exiled Airman
Musselsyou missed the previous news post, where it was found to be PCI-E 2.0 x4
Doesnt matter GPUs can still be used
Posted on Reply
#33
InVasMani
I believe the 2.0 x4 slot is shared with the chipset though unless AMD got fancy and somehow fused off CPU lanes and re-routed them like a Paul Walker fast and furious scene to the PCIE card bus.
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