December 3, 2021

NVIDIA Hopper MCM GPU w/ 3D Stacking to Draw Over 1,000W of Energy: Over 30,000 Cores [Rumor]


NVIDIA’s next-gen information heart GPU (accelerator) will draw over 1,000W of energy. This was revealed by well-respected tipster @kopitekimi the opposite day. Codenamed “Hopper” after the American pc scientist Grace Hopper, the GH180 is predicted to characteristic 3D stacking (TSMC’s CoWois packaging know-how). It’ll be a heterogeneous chip that includes a mixture of Grace (GH200) and Hopper (TH500). What precisely is the distinction between Grace and Hooper stays unknown. Both approach, Hopper ought to characteristic two an identical chiplets, every that includes over 10,000 CUDA cores and round 1280GB of HBM2e/HBM3 reminiscence.

NVIDIA RTX 4080/4090 Specs

If the AD102 features a complete of 18,432 cores, we will anticipate roughly 16,000 cores on the RTX 4080 and 18,000 on the RTX 4090. Contemplating that we’re prone to see the AD102 fabbed on Samsung’s 5nm/6nm node, the rise in transistor density ought to take up the in any other case anticipated enhance in die dimension.

With the subsequent technology of GeForce graphics playing cards, we’re not solely phenomenal efficiency targets but additionally appreciable will increase to the TDP. In keeping with Greymon and Kopitekimi, the Lovelace-based RTX 4080/4090 will draw as a lot as 500W of energy below load. That is regardless of the usage of one of the crucial superior and environment friendly course of nodes on the planet. Nevertheless, working the numbers type of provides up. The AD102 flagship is predicted to characteristic 144 SMs/12 GPCs, a achieve of 71% when it comes to logic in comparison with the GA102. Even when TSMC’s N5 node is 30% extra power-efficient than Samsung’s 8nm LPP node, we’re a rise of no less than 80% in {hardware} items. That ought to simply lead to an influence draw no less than 30-50% greater than the top-end (RTX 3080/3090) Ampere choices.

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Hopper might characteristic two Ada dies on the identical substrate (Through: @Harukaze)

In keeping with a report from Igor, this can be facilitated by the brand new 12VHPWR energy connector. As a part of the next-gen PCIe Gen 5 customary, the PCI SIG has outlined a brand new “Excessive Energy Connector” or H+ for graphics playing cards with a energy requirement of as much as 600W. The 12VHPWR connector is a significant departure from the prevailing PCI Specific 2×3/2×4 Auxiliary Energy connectors. Whereas the pins of the previous have a spacing of three.0 mm, the latter has a bigger spacing of 4.2 mm. Subsequently, they gained’t be appropriate with the identical {hardware} and require adjustments on each the PSU and the GPU PCB.

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