Introducing the NVIDIA RTX 4090 Founders Edition PCB
No more renders, the PCB was shown during RTX 40 Editors Day.
The RTX 4090 PCB has better handling of power transients, claims NVIDIA. The compact PCB for NVIDIA’s massive three-slot RTX 4090 design has as many power stages as the RTX 3090 Ti. It’s also the first time the company has shown the AD102 GPU in a real photo.
The PCB is almost identical to the Founders Edition RTX 3090 Ti. There are some minor changes, such as relocated capacitors or the lack of NVLink on the RTX 40 model, but even the layout of GDDR6X memory and VRMs haven’t changed.
According to NVIDIA, the RTX 4090 has 20+3 phase re-architectures (GPU/memory) with better transient voltage handling. This should limit power excursions compared to previous generations. Additionally, it should also reduce the risk of power cuts due to power spikes. No ATX 3.0 power supply is required, confirms NVIDIA.
The PCB is designed for the PCIe Gen 12+4 pin connector (12VHPWR), consuming up to 600W when the GPU is overclocked. So far, all card partners have announced a default TDP of 450W, but some are hinting at a higher TDP with dual BIOS settings. We’ve already reported that the maximum configurable TGP is over 600W, but it’s unclear how many cards will see such a limit. Either way, NVIDIA claims that 3×8-pin or 4×8-pin to 16-pin power adapters will work just fine with any power supply.
NVIDIA is also leaking details on the AD102 GPU, the flagship processor set back for RTX 4090. This GPU should feature 76.3B transistors and up to 18432 CUDA cores (FP32 units) in full configuration (so not for 4090). They are grouped into 12 GPCs (Graphics Processing Clusters) and 144 SMs (Streaming Multiprocessors). NVIDIA confirms that the full AD102 GPU has 576 Tensor cores and 144 RT cores. Additionally, the RTX 4090 will have 192 ROPs.
NVIDIA also makes statements regarding the design of Founders Edition. What was immediately noticed during the first leaks are bigger fans. This change alone will improve airflow by 20%. What hasn’t been pictured yet is the new heatsink under the updated frame, redesigned vapor chamber, and new baseplate.
NVIDIA is now ready to launch its RTX 4090 GPU on October 12. So far, only one media site has publicly acknowledged receiving the Founder’s Edition from NVIDIA.
Source: HardwareLuxx, TechPowerUP