NVIDIA shared how it improved the reference flagship GeForce RTX

NVIDIA shared how it improved the reference flagship GeForce RTX 4090 Founders Edition graphics card

NVIDIA spoke in detail about the features of the reference version of the flagship graphics card of the new generation GeForce RTX 4090 Founders Edition. Although the overall design of the card is very similar to the GeForce RTX 3090 Ti Founders Edition based on the Ampere architecture, the manufacturer has made some changes.

    Image source: NVIDIA

Image source: NVIDIA

The outer metal frames of the GeForce RTX 4090 Founders Edition graphics card received a more pronounced metallic tint, and the graphics card’s heatsink assembly was redesigned to improve airflow between the two fans on each side of the accelerator.

The fans themselves are also new. According to NVIDIA, they went through 50 different fan options before deciding on a specific model that delivers up to 20% more airflow compared to fans on the GeForce RTX 3090 Ti Founders Edition. In addition to the radiator and fans, the company has changed the evaporator plate of the cooling system. It’s gotten bigger and is now more efficient at absorbing heat from the GPU and surrounding memory chips. Heat from the elements of the video card’s power supply subsystem is transferred to the base plate. The manufacturer has also revised the decoupling of the heat pipes for better heat distribution.

The new flagship GeForce RTX 4090 Founders Edition accelerator uses the same compact, irregularly shaped PCB as the reference versions of the older GeForce RTX 30 series models. The card receives additional power via the new 12+4-pin 12VHPWR PCIe 5.0 connector. It can transmit up to 600 watts to the accelerator. NVIDIA states that graphics cards of the Ada Lovelace generation do not require a power supply that complies with the ATX 3.0 and PCI-Express 5.0 standards. The accelerators come with the necessary adapters for three commercially available 8-pin connectors.

While the GeForce RTX 4090 is rated at 450W, the power limit can be increased to 600W. This can be useful when overclocking the graphics card manually. The stable operation of the graphics card is ensured by a 23-phase power supply subsystem (20 phases for the GPU and three more for memory). NVIDIA redesigned the power supply subsystem to ensure stable voltage regulation. This is done on purpose to minimize the voltage spikes or spikes seen on previous generation high-end graphics cards like the GeForce RTX 3090 Ti and Radeon RX 6900 XT. These spikes can cause some power supplies to shut down spontaneously, even if they are rated higher than required.

In the graphic above, NVIDIA shows how power spikes are mitigated on the GeForce RTX 4090 with a new VRM architecture that uses a PID feedback loop. While the GeForce RTX 3090 can spike and crash, the new card remains relatively stable and follows its current load pattern with a 10x faster power management response. It’s also worth noting that the peak power of the GeForce RTX 3090 is higher than that of the GeForce RTX 4090. Even if the former has a 100W lower TDP than the new flagship (350W vs. 450W).

The company paid special attention to the memory of the graphics card and managed to reduce the operating temperature by 10 degrees. With support from Micron, the manufacturer selected chips based on a new process technology with a capacity of 16 Gbps. As a result, all GDDR6X chips are placed on the same side of the graphics card PCB and are cooled more efficiently.

The GeForce RTX 4090 will go on sale on October 12th. The recommended cost for the graphics card is $1600. NVIDIA’s flagship next-generation accelerator is based on the AD102 processor based on the Ada Lovelace architecture. It is based on TSMC N4 4nm process technology and features 16,384 CUDA cores, 512 texture units and 192 ROPs. The card received 24 GB of GDDR6X memory with support for a 384-bit bus and a speed of 21 Gb / s per pin.

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Dylan Harris

Dylan Harris is fascinated by tests and reviews of computer hardware.

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