On the graphics side, the improvements are much more constant. Yet for one test, using Y-cruncher to compute Pi to one billion digits, it was 10 to 15 percent slower, probably because the nominal clock speed of the 11800H is slower than that of the 1185. In general benchmarks, of course, it usually easily beats the standard laptops. It appears that Excel doesn’t really use the extra cores. On a very large Excel spreadsheet that used lots of data, it took 40 minutes, better than the 44 minutes I saw with the Extreme Gen 3, but only barely beating out the standard laptops (which took 41 minutes). The difference shows up dramatically in some applications, and not much in others.įor instance, on my most demanding tests, it completed a MatLab portfolio simulation in just over 23 minutes, much faster than the 36 minutes recorded by last year’s ThinkPad X1 Extreme Gen 3 and more than twice as fast as the lower-power standard Tiger Lake laptops. So the Extreme Gen 4 has more cores and threads, but a lower top speed per core. The more standard high-end enterprise laptops I tested recently, such as the ThinkPad X1 Carbon Gen 9, all had a 15-watt Core i7-1185 processor, a Tiger Lake-U processor with 4 cores and 8 threads, a nominal speed of 3.0 GHz, and a maximum turbo of 4.8 GHz. In comparison, the Extreme Gen 3 had a Core i7-10850H in last year’s Comet Lake family, with 6 cores and 12 threads with a base speed of 2.7 GHz and a maximum turbo of 5.1 GHz. The X1 Extreme Gen 4 I tested has an Intel i7-11800H processor in the 45-watt H-series part of Intel’s Tiger Lake family produced on the 10nm SuperFin Process, with 8 cores and 16 threads, a nominal clock speed of 2.3GHz, and a maximum turbo of 4.6GHz. The big difference in performance comes down to improvements in the CPU and the GPU. The unit I tested had 16 GB of memory and a 512 GB hard drive. It measures 0.70 by 14.13 by 9.99-inches (HWD), and as such it’s not nearly as easy to carry as a typical enterprise laptop, but of course, it has a lot more power. The X1 Extreme is a power user's laptop, with a 16-inch display, weighing 4.4 pounds by itself and 6.22 pounds with the 135-watt charger. In looking at Lenovo’s ThinkPad X1 Extreme Gen 4, I noticed a huge improvement over last year’s X1 Extreme Gen 3, but the benefit very much depends on what you are using the machine for. Laptop computers keep getting better, but the improvement is usually gradual from one year to the next.
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