Microsoft Surface Book Performance Base (GTX 965M): What a Base-Only Unit Is Actually Good For

The Laptop That Unlocked Itself With a Hot Wire

In October 2015 Microsoft shipped a laptop whose screen came off — and locked that screen down with a piece of wire that had to be electrocuted before it would let go. The Surface Book hinge used a shape-memory alloy, the kind engineers nickname muscle wire, that physically contracts when current is passed through it. You held down the detach key, the wire heated, the latch pulled back, and the top half of your laptop became a tablet. No lever. No button you could bump in a bag. No spring to tire out after two years.

The stranger idea was what stayed behind on the desk. On almost every other 2-in-1 ever built, the keyboard half is a dumb accessory: some plastic, some key switches, maybe a trackpad. Microsoft made the bottom half the interesting half. It carried a second battery, the full-size USB ports and the SD reader, and — in the version that mattered to anyone doing real work — a discrete NVIDIA graphics chip. In October 2016 Microsoft put a GeForce GTX 965M down there and called it the Performance Base. For a couple of years, the fastest part of your laptop was the part you could walk away from.

What the Performance Base Actually Is

We have one on the shelf: a Microsoft Surface Book Performance Base with the GTX 965M — $89.99, base only, no tablet. Read that last part twice, because it is the whole story of this listing. This is the keyboard half. There is no screen, no Windows license, no tablet section. What you get is the silver aluminum lower body: keyboard, glass trackpad, the fulcrum hinge with its latch mechanism, the second battery pack, the port cluster and the GPU compartment.

A Surface Book base is not a spare part in the boring sense. It is roughly half the machine by weight and, on a Performance Base, arguably more than half by value — nobody parts out a $60 Chromebook keyboard, but a graphics-equipped Surface Book base is worth listing on its own.

Who Actually Buys a Base With No Tablet

Three kinds of people, in our experience:

• Someone whose base died and whose tablet is fine. This is the common one. The base takes the abuse — it gets the coffee, the drops, the port wear, the battery that finally stops holding a charge. The tablet half often outlives it. Buying a replacement base is dramatically cheaper than buying a whole machine.
• Someone upgrading from a plain base to a Performance Base. If you bought the entry Surface Book without the discrete GPU, the tablet is the same computer — the graphics live in the base. Swapping bases is the closest thing a laptop has ever had to a graphics card upgrade.
• Repair shops and parts sellers. Keyboards, trackpads, hinges and batteries all get harvested from bases like this one.

Before You Buy: Match the Generation

This is the part to get right before you click. Surface Book bases are not universally interchangeable across the line — the original Surface Book and Surface Book 2 are different machines with different connector arrangements and different sizes. Check your tablet's model number against the base you are buying, and if you are not certain what you own, look at the label under the kickstand-free bottom edge of your tablet before ordering rather than after. A base is a large, heavy thing to send back.

Also worth knowing: the second battery in any base of this age is a decade-old lithium pack. Treat extra runtime as a bonus, not a spec. The GPU, the ports, the keyboard and the hinge are the parts that hold their value.

What Goes in the Bag With It

Since you are already shopping the laptop aisle, the rest of the shelf: a 10-pack of Amazon Basics 17.3-inch laptop carrying cases with shoulder straps at $95.39 is the one to look at if you run an office, a classroom cart or a repair bench and need to hand out sleeves rather than buy one. For a single nicer bag, a brown leather anti-theft briefcase with a combination lock, sized for a 16-inch laptop, at $144.99.

On the parts side we have a lot of 12 Lenovo laptop batteries, Logitech headsets, keyboards, MOFT stands and a charger for $101.99 and a lot of 12 laptop chargers, batteries, RGB keyboards, Bluetooth headsets and a trackball for $111.99 — both aimed at repair shops and resellers who need volume rather than one specific SKU. There is also a lot of 9 computer accessories with laptop batteries, an ASUS charger, an iPad kiosk and a speaker at $78.99.

And if the reason you liked the Surface Book was the idea of typing on something that is also a trackpad, the MOKIBO INNOPRESSO wireless keyboard with a built-in touchpad, marked down to $47.99 does that trick on a desk instead of a hinge — it works with Mac, iPad and Windows.

The Honest Summary

If you own a matching Surface Book tablet with a dead or plain base, this is one of the few upgrades in laptop history that is genuinely a drop-in. If you do not own the tablet, it is a parts donor with a nice keyboard and an old gaming GPU in it. Both are legitimate reasons to buy it. Neither one is "a laptop," and we would rather say so on the way in than argue about it on the way back.