Intel says yes, our graphics cards kind of suck when used with older (and slower) CPUs.

https://wccftech.com/intel-acknowledges-performintel-acknowledges-performance-degradation-when-arc-gpus-are-paired-with-older-...

Intel's graphics drives are somewhat inefficient. This doesn't show up on recent CPUs, because they are fast enough to keep up anyway. But if you pair an Intel graphics card with a CPU from five years ago, the performance bottleneck is now the CPU.

This is a problem because Intel's graphics cards are cheaper than anything current from AMD or Nvidia, making them look like a good option for people with tight budgets... Who would still be more likely to be using older CPUs.