![]() ![]() Surface Laptop Core i7 stress test and throttlingĬPU thermal management is always a challenge, so the question of whether Microsoft is purposefully limiting the Core i7 on the Surface Laptop is a legitimate one. Let's now turn to throttling to see what happens there. The Laptop's higher scores compared to Surface Pro likely have to do with more agressive power limit throttling in the Pro due to its thinner and more compact chassis. The Surface Laptop with Core i7 outperforms the Core i5 version significantly for both CPU and GPU. ![]() Overall, there are no caveats or surprises here. That choice was made to save space, power, and add a larger battery. Microsoft faced new constraints with the Surface Laptop because storage, for the first time, is directly integrated into the motherboard instead of a separate module. Real-world usage for running apps, games, and the OS feels fast with the Surface Laptop's SSD, so it's not a problem unless you do large file transfers. It is not yet known if the 512GB Surface Laptop has a different drive, but since SSDs usually scale up in performance based on size, even if they're the same type, it should be faster than at 256GB. Microsoft is using the same Toshiba (THNSN0256GTYA) solid-state drive (SSD) as the Core i5 variant at 256GB. Geekbench 4.0 benchmarks (higher is better) That difference is likely due to more aggressive power throttling (more on that below). Just as interesting is how the Surface Laptop's Core i7 slightly outperforms the Surface Pro (2017) with a similar configuration. ![]() Taking a closer look at Geekbench 4.0, which is more CPU-heavy than graphics-heavy, you can see a significant jump in performance between the Surface Laptop Core i7 over the Core i5 variant. (Floating point operations are used for computing scientific or real-time processing applications that crunch extremely long numbers). All of that effectively doubles the floating-point operations per second (FLOPS) from 384 to 730 in favor of Iris Plus. Likewise, the Graphics Max Dynamic Frequency jumps from 1.00 GHz to 1.10 GHz with the Iris Plus 640. That eDRAM also is likely what drives up the cost of the chip because that memory is not cheap. The eDRAM is a big deal for performance and is completely lacking with the Intel HD 620. When it comes to graphics, the Iris Plus 640 has double the execution units – 48 – and features 64MB of eDRAM. ![]()
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