Thanks, Atari. That benchmark is useful.
I scored 1118
Average FPS 44.4, Min FPS 21.1, Max FPS 93.2
Processor: AMD-FX 6300 six core processor @ 3.5 Ghz (according to the manufacturer, it's supposed to boost up to 4.1Ghz, but I've not yet seen it do that. Perhaps I've just not stressed it enough yet)
GPU: Nvidia Geforce GTX 650 TI Boost 2GB (though the benchmark and DXDIAG say I have 3GB, so 1GB of system memory must be used for graphics)
8GB RAM.
I've been told it's a decent enough PC (though I suspect it could use more RAM and a better graphics card). I'm not 100% sure as I bought it on a whim as a replacement for my Xbox 360 because I didn't fancy Xbox One or PS4 (both of those consoles seem pretty desperate to me). I used to be a PC gamer about 8 years ago, but I've spent the time since then in the murky waters of console gaming and I'm trying to find my way back to some decent games... Got really sick of all the generic shooters on Xbox 360

. As a result I'm a bit out of the loop with PC hardware and what I should expect from this PC.
This PC was listed as a gaming PC, was in my price range, so I thought I'd give it a try. Mostly I've been messing around with indie titles downloaded from Steam. The most graphics intensive games I've ran on it so far are Batman Arkham City and it runs fine and X-Plane 10 and it runs fine too. I did try X-Rebirth and it ran really badly, but I've since learned that it runs badly on everything...