It looks like both HP and Toshiba are working on devices powered by NVIDIA’s Tegra 4 chipset. HP has two – a tablet and an All-in-One computer – and Toshiba has at least one tablet (that we know of). The trio was discovered in AnTuTu benchmarks.
The HP tablet is called HP SlateBook 10 X2 and packs a 10” screen with FullHD resolution. It ran Android 4.2.2 Jelly Bean at the time of benchmarking.
The Tegra 4 chipset had its four Cortex-A15 CPU cores clocked at 1.8GHz and scored an impressive 27,259 on AnTuTu. The chipset also has a fifth power-saver core (it’s a homebrewed setup, not ARM’s big.LITTLE).
Then there’s the All in One – the HP SlateBook 21 AiO. This device runs Android 4.2.1 and was also powered by a Tegra 4 at 1.8GHz but scored lower, 23,584. This is likely due to the higher resolution of the screen (unfortunately, resolution is unknown).
This is likely a similar setup to the Asus Transformer AiO we saw at the MWC, which ran Windows 8 on an Intel Core processor and Android on a secondary Tegra 3 chipset inside.
The Toshiba tablet is labeled just AT10LE-A, presumably a 10” tablet. It ran Android 4.2.1 on a 1.8GHz Tegra 4 chipset and scored a little higher than its HP counterpart, 28,058.
Source 1 (in German) • Source 2 (in Japanese)