If I had £500 burning a hole in my pocket, I wouldn't be looking to spend it on tech. If someone gave my £500 on condition that I spent it on tech, I suppose I could find something to buy if I thought about it.
But it's a sum in that awkward zone of being too much to be a whim, but not enough that if I really wanted something, I wouldn't already have gone out and bought it.
I mean, my PC would do with updating, I suppose. It's some years old, after all. But, frankly, despite that it still works perfectly, copes with what I need it to do and replacing it would feel a bit like doing so for the sake of iy, not because I really need a new one, or even really want one.
Make it serious money (I.e. lottery jackpot scale) and I'm sure I could put a dent in it, but £500? I'd probably just stick it in a rainy day fund.