(Image credit: Lenovo) Lenovo has just updated its current-gen Legion 7a 16-inch gaming laptop with a new GPU config: the 12GB version of the RTX 5070 mobile. Previously, the laptop 5070 was limited to just 8GB of VRAM, but Nvidia recently overhauled it , splitting the 5070 SKU into two distinct variants. Lenovo is one of the first vendors to feature the 12GB 5070 in a retail device, but it doesn't come cheap — this new Legion 7a is listed for a whopping $3,375 on Best Buy right now. (Image credit: Future) For that money, you're getting a flagship Ryzen AI 9 HX 470 CPU, 32GB of LPDDR5X-8000 memory, and a 1TB PCIe 4.0 SSD. Not to mention a gorgeous 2560 x 1600 OLED display with a 240 Hz refresh rate, solid build quality, and a plethora of cutting-edge I/O. This laptop is also the perfect recipient for the upgrade since its GPU topped out at a measly RTX 5060 before, making it less powerful than the last-gen Legion 7a devices.…