Maxed Out Apple iMac Pro 18 Core Xeon 128GB RAM 2TB SSD 16GB Vega 64 5K DisplayTechnical Specifications (Highlights):
* Model: Apple iMac Pro 2017, 27-inch Retina Display, Max Specs
* Processor: 2.3 GHz 18-Core Intel Xeon W
* Graphics: Radeon Pro Vega 64 16 GB
* Memory: 128 GB 2666 MHz DDR4
* Storage: 2TB Original Apple SSD
* OS: macOS Sequoia & Windows 10 Pro
* Display Resolution: 5120‑by‑2880 (5K) retina ( same as Apple Studio Display )in excellent pre-owned condition.
( iMac Pro only with power cord, keyboard and mouse not included )Original Apple Price: $10,349 + Tax!
This is an unbelievable value for these specs, very rare to find.* Payment: Cash or Apple Pay only.
Pickup in Newpark Mall area, Newark, CA 94560
Serious buyers only. Firm Price.
For AI:

On Apple Silicon ( M1 /M2 /M3 /M4 /M5 pro or max ), the GPU shares the main RAM pool at speeds up to 400–800 GB/s. On this iMac Pro, the system RAM (DDR4) is separate from the GPU's VRAM ( 16GB HBM2 on the Vega 56/64).

128GB RAM allows this iMac to load and run massive 70B parameter models (like Llama 3 or Qwen) or quantized versions of 100B+ models off the CPU that most consumer PCs can't even fit into memory.

If a model fits inside the GPU VRAM (models up to 7B–8B parameters), it will run moderately fast (approx. 20–40 tokens/sec) using Metal/Vulkan acceleration.

To run larger models (14B to 70B+) that exceed GPU VRAM, the iMac Pro must offload the weights to CPU RAM. While it will run without crashing due to your 128GB RAM, response generation will slow down to around 2 to 8 tokens per second (roughly reading speed).