A German website recently benchmarked the Intel 8th gen. Kaby Lake refresh laptop CPUs. The tested hardware were Medion Erazer P7651 and Acer Spin 5. The performance results were fascinating for the 15W low powered notebook processors.
The tested CPUs of Kaby Lake refresh were Core i7-8550U with 4 cores 8 threads, 1.8 base and 4.0 GHz Turbo clock with 8 MB cache & Core i5-8250U with 4 cores 8 threads, 1.6 base and 3.4 GHz Boost clock with 6 MB cache.
Both the CPUs of Kaby Lake refresh performed really well even under constant loads of Prime 95 and Cinebench R15. In Cinebech R15, the starting clocks with turbo were 4 GHz for i7 and 3.4 GHz for i5. When all threads were loaded the i7 was able achieve stable clock speeds of 2.3-2.4 GHz where as the i5 managed to get a 2.3 GHz as well.
For Prime 95 on all threads loaded, the i7-8550U managed to achieve a 1.9-2.0 GHz speed while the i5-8250U was able to attain 1.8-1.9 GHz. That’s a significant improvement, considering that cores have multiplied and Speeds are still doing a solid one on stress testing.
The double number of cores, huge Turbo boost and more cache literally adds up a significant performance gains even under multi-threaded loads. The single core Turbo is far better than any of its predecessors. For Kaby Lake refresh the benchmarks of POV-Ray and the x265 HD benchmark were also used for this comparison. The new CPUs in multi-core applications are 60 percent higher than their predecessors.
Both the processors performed really well in a gaming test of Tomb Raider (2013) on lowest preset. With the i5 being 10% faster than its 7th gen. predecessor. For 15W TDP Intel has finally raised the bar from a single digit performance increase to 20% gains on average. All of this in a low powered light notebook. Seems like I’ll be ordering one for myself.
All images and benchmark sources are respective courtesy of computerbase.de.