Nvidia has added the RTX Pro 5500 Blackwell to its professional graphics lineup, a workstation card built around the same GB202 die and 21,760 CUDA core count as the consumer GeForce RTX 5090, but fitted with 84GB of ECC GDDR7 memory and certified for professional workloads rather than gaming.
The memory runs across a 416-bit bus for roughly 1,398GB/s of bandwidth, and the card carries a 600W power limit. Reaching 84GB takes 28 individual GDDR7 modules: Nvidia has placed 14 on the front of the PCB alongside the GPU die and another 14 on the back, sandwiching the board to fit that much capacity into a standard card footprint, according to TechPowerUp, which also worked out that each chip runs at roughly 26Gbps per pin, a standard GDDR7 speed rather than the fastest available on the market.
The extra memory over the consumer RTX 5090 matters less for raw compute than for what fits in VRAM at once. Capacity on a workstation card sets how large a model, scene or dataset can sit in memory without spilling into much slower system RAM, which is what stalls long training runs and heavy renders. ECC support, which the GeForce line does not carry, catches and corrects memory errors before they can corrupt a job running for hours unattended. That is the real distinction between an RTX Pro card and a GeForce card cut from the same die: certification and memory headroom, not extra shader throughput.
Where the RTX Pro 5500 Blackwell sits in the lineup
The new card slots between two existing Blackwell workstation parts. The RTX Pro 5000 Blackwell, one tier down, has 14,080 CUDA cores and tops out at 72GB. The RTX Pro 6000 Blackwell, the flagship, has 24,064 CUDA cores and 96GB. The RTX Pro 5500 closes much of that gap: its CUDA core count sits far closer to the 6000-series flagship than to the 5000 below it, and its 84GB of memory is only 12GB short of the top card, for a part positioned as the mid-tier option in the range.
Nvidia did not stage a launch event for the card. Both outlets that first reported it described the addition as quiet, consistent with how the company has rolled out most of the Blackwell Pro range: new SKUs appear in the product catalogue and specification sheets without a keynote slide to go with them.
84GB officially, 96GB on the grey market
Nvidia’s own ceiling for GB202-based cards, 96GB on the RTX Pro 6000, is a figure the grey market has already matched unofficially. Teqpost reported on a modded RTX 5090 with 96GB of memory listed on Alibaba for $3,888 earlier this month, built by resoldering higher-capacity GDDR7 modules onto a consumer board that officially ships with far less. The RTX Pro 5500 shows the same problem solved the sanctioned way: Nvidia reaches 84GB on a certified, ECC-equipped card by sandwiching modules on both sides of the PCB, without touching the die or voiding a warranty. The modders get there by forcing capacity onto silicon Nvidia never validated for it, with no ECC and no warranty behind it.
