Lenovo ThinkPad T470 Ultrabook running Linux – Part 4 – Benchmarks

Processor Benchmarks

The ThinkPad T470 had models with either a 6th or 7th generation Intel processors. Our test machine has an i5-6300U, a dual core mobile processor with hyperthreading. This is a 6th generation i5, launched in 2015. It has a TDP of 15W (can be lowered to 7.5W and increased to 25W).

There are many processor benchmarks available, so we’ve limited the tests to 4. We’ll start with Smallpt.

Lenovo ThinkPad T470

$ phoronix-test-suite benchmark smallpt

Smallpt is a C++ global illumination renderer written in less than 100 lines of code. Global illumination is done via unbiased Monte Carlo path tracing and there is multi-threading support via the OpenMP library.

The ThinkPad T470’s performance in this test is pretty respectable, not too dissimilar to the result for the quad core i5-4590T. We’ve seen systems with an i5-7300U processor obtaining around the same performance as the T470.

Lenovo ThinkPad T470

$ phoronix-test-suite benchmark compress-pbzip2

pbzip2 is a parallel implementation of the bzip2 block-sorting file compressor that uses pthreads and achieves near-linear speedup on SMP machines.

This test measures the time needed to compress a file (a .tar package of the Linux kernel source code) using BZIP2 compression.

The T470 completes this test in just under a minute, hindered by only having 2 cores, although its hyperthreading ensures that it completes the test faster than the quad-core Celeron J4115 processor.

Lenovo ThinkPad T470

$ phoronix-test-suite benchmark crafty

Crafty is a chess program directly derived from Cray Blitz, winner of the 1983 and 1986 World Computer Chess Championships.

This is a benchmark looking at the CPU’s performance through a chess benchmark. This benchmark only uses a single core. The T470’s i5-6300U puts in another good performance.

Lenovo ThinkPad T470

$ phoronix-test-suite benchmark x265

This is a simple test of the x265 encoder run on the CPU with a sample 1080p video file.

Due to time constraints, we only ran this test on four machines. This is the first test where the ThinkPad T470’s performance was a mite disappointing.

Next page: Page 3 – Memory / Graphics

Pages in this article:
Page 1 – Introduction / System
Page 2 – Processor
Page 3 – Memory / Graphics
Page 4 – Disk / Specifications

Complete list of articles in this series:

Lenovo ThinkPad T470 Ultrabook
Part 1We spotlight the condition of our refurbished T470 laptop
Part 2Specifications of the T470 laptop using the inxi utility to interrogate the system
Part 3Installing the Manjaro distribution
Part 4We run a series of benchmarks on the T470 and compare to other machines
Part 5Multimedia performance including power management
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