Cheapest 32 core latest EPYC (9335) x 2 = $3,079.00 x 2
Intel 32 Core CPU used above x 2 = $3,157 x 2 (I would choose the Intel Xeon Gold 6530 which is going for around $2k now, and with with higher clock speeds, and a 100 MB of more cache)
AMD Epyc Dual Socket Motherboard Supermicro H13DSH = $1899
Intel Supermicro X13DEG-QT = $1,800
Memory, PSU, Case = Same
4090 GPU = $1599 - $3,000 (temporary?)
Besides the GPU cost, the rest is about the same price. You only get a deep discount with AMD setups if you use EPYCs a few years old with cheaper (and slower) DDR4.
And again, if you go single CPU, you save over $4,000, but lose around 30% in token generation.
The "$6,000" AMD examples I've seen are pretty vague on exactly what parts were used and exactly what R1 settings including context length they were run at, making true apple to apple comparisons difficult. Plus the Sapphire Rapids + GPU example is about 10x faster in prompt processing. (53 seconds to 6 seconds is no joke!)
