Comment by fc417fc802
9 hours ago
Do those laptops not have on the order of ~64 GB/s bandwidth? Meanwhile your example of an RTX 4050 is a mobile SKU with 192 GB/s while the lowest entry level dGPU from that generation, the RTX 4060, boasts 272 GB/s. The RTX 4070 range ups that to 500 GB/s and the high end breaks 1 TB/s.
tl;dr iGPU vs dGPU memory bandwidth is a >10 year difference.
So now to double check my guestimate of 3 to 4 generations from earlier. Entry level RTX 30 448 GB/s in 2020, eventually downgraded to 168 GB/s in 2024. Entry level RTX 20 448 GB/s in 2018 eventually downgraded to 336 GB/s in 2019. You have to go all the way back to the GeForce 10 series to dip below 100 GB/s and even then that's due to some highly unusual configurations introduced many years after the initial launch. At launch in 2016 the lowest end GTX 1050 pulled 112 GB/s which is nearly 2x Panther Lake IIUC.
Ah, I understand where you’re coming from now. You’re really heavily focused on memory transfer speed. That’s really not the only measure of GPU performance and certainly not the one I’m interested in for my workloads. (I do not care for local LLM work for one thing)
For example, the ThinkPad X9 15p with Panther Lake integrated graphics will do 80FPS in Cyberpunk 2077 while the RTX5060 in a Legion 7a will do 109FPS on the same settings (1920x1200, quality up scaling, no frame gen).
So what that means is you can get a super quiet thin and light laptop that gets double digit hours of productivity battery life and has roughly the same tier of gaming experience as a thicker, heavier, power-hungry gaming PC that is pumping 115 watts into the GPU.
To answer your question, LPDDR5x should be more close to 100GB/s so I think you are underestimating the memory bandwidth of Panther Lake laptops. Not sure though.
That all said, overall a RTX5060 or higher laptop would be preferable, I just find it hard to find one that checks a lot of the “thin and light 13-14” premium long battery life productivity laptop that can game on the side” boxes.
> Do those laptops not have on the order of ~64 GB/s bandwidth?
The Macs? No, they go up to 614 GB/s, nearly an order of magnitude more.
Are we talking about gaming or GPGPU? Because AFAIK gaming is more likely to be constrained by SSD performance than GPU memory bandwidth.