GPU Bottleneck?

[admin89]

That Core i3 is also a dual core with Hyperthreading (2 cores / 4thread s). Dolphin is a dual core application , dolphin doesn't give a damn about Hyperthreading
Your laptop has CPU bottleneck while your desktop has GPU bottleneck (Intel GPU suck). At 1x Internal Resolution , The i3 should perform much better than Core 2 duo but neither of your system have enough juice to run latest Dolphin