News More GeForce RTX 5090 Founders Edition mysteries revealed: backside of the PCB

[Admin]

Backside of GeForce RTX 5090 Founders Edition PCB reveals mezzanine connectors, four additional power phases.

More GeForce RTX 5090 Founders Edition mysteries revealed: backside of the PCB : Read more

 

[edzieba]

I'd bet on these connecting to FFCs rather than directly to other boards. If they were direct BTBs, then there would be no need to use 1x male and 1x female connector (simplified BoM for populating that board by eliminating an entire component stream), but if using FFCs then having two different gender connectors effectively keys them to only accept the correct flex. Using FFCs also minimises airflow disruption, and allows the sub boards to be freely relocated: likely the entire reason for separating out the different boards from the normal monolithic layout in the first place.

 

[80251]

Wouldn't using FFCs to connect other PCBs introduce more parasitic RLC characteristics to the circuit than having just one larger PCB?

 

[edzieba]

Wouldn't using FFCs to connect other PCBs introduce more parasitic RLC characteristics to the circuit than having just one larger PCB?

Not necessarily, FFC substrates can be just as well performing as FRC, and sometimes even perform better (nice and homogenous rather than fibrous).

 

[80251]

Can you model a PCB to PCB interface using FFCs in Pspice?

 

[P1nky]

How hard is to to take a photo directly above the product and not an angle?

 

[atomicWAR]

How hard is to to take a photo directly above the product and not an angle?

Pretty standard fair though your not wrong in the slightest. I'd prefer straight on shots myself even if I get they do it to prevent more accurate speculation about yet/soon to be launched products. Man do they love to make measurements harder to do for folks like us but end of day...we'll still try!!

 

[Gu3sts]

Why not use a good old fashioned ruler & place it near the pcb to get dimensions

 

[tresnugget]

PCWorld has already looked at the different connectors. J805 connects to a cable that routes around the edge of the frame to a board hosting the display ports and HDMI. J806 connects to the pcie 5.0 x16.