So I got my 2080 Ti plugged in. It's an EVGA Black Edition, so it came out of the box completely stock. It's basically the TU102 lottery. You get a GPU with a back plate and a decent cooler and it's on you to find what the boost OC for that chip is. When you buy a video card with an OC you are effectively paying for two services: a) that your chip WILL run at some level of offset, and that b) it may have been binned for much higher but NVidia has maximums that AIB partners can ship cards at, even if the chip will go much beyond that. If you're willing to play the lottery on the silicon you can save 300-400 bucks at the very top end. Given that most TU102's will overlock to something reasonable, I spun the wheel.
So far it hasn't been bad. I got +280mhz on the core and +800mhz on the memory stable. Oddly enough I was able to get +325/+850 in Time Spy Extreme (DX12), but in Fire Strike Extreme (DX11) it failed at that core and in Fire Strike Ultra it failed at that memory frequency. So I had to back it down to the eventual stable 280/800. I could probably get more out of it by playing with power stuff but I have no desire.
By the numbers I was able to get ~10% more out of the card with a very light OC session. Core clocks in the 1900mhz range under load with temps at 74C is decent silicon. It's not the best TU102 I've seen, but it's not the worst.
So taking my stock numbers from my 1080 Ti above, the 2080 Ti with this OC is almost exactly 30% faster at the top end. It also scales better at higher resolution. All as advertised.
2080 Ti (OC +280/800):
Time Spy Extreme: 6105
https://www.3dmark.com/3dm/32410427?
Time Spy: 13083
https://www.3dmark.com/3dm/32410515?
Fire Strike Ultra: 8626
https://www.3dmark.com/3dm/32410603?
Fire Strike Extreme: 16603
https://www.3dmark.com/3dm/32410715?
Fire Strike: 27407
https://www.3dmark.com/3dm/32410808?
I didn't have an FE Time Spy Extreme value but I was able to look at 3DMark's card list and see most FE's doing something around 4225, so we'll use that.
Time Spy Extreme: old 4225, new 6105 = 30.8%
Time Spy: old 9332, new 13083 = 28.6%
Fire Strike Ultra: old 6833, new 8626 = 20.8%
Fire Strike Extreme: old 12783, new 16603 = 23%
Fire Strike: old 22351, new 27407 = 18.5%
So we can extrapolate a few things here. First off the RTX cards scale best at higher resolutions in DX12. Not a huge shocker there. Interestingly Fire Strike Ultra and Extreme are weird outliers. I would expect those to be reversed.
For funsies I ran the RTX benchmark as well, stock and OC:
Port Royal (RTX - Stock): 7477
https://www.3dmark.com/3dm/32411065?
Port Royal (RTX - OC): 8348
https://www.3dmark.com/3dm/32411148?
Nothing to really compare them to, but OC'ing does effect RTX performance!
So overall, worth 1000 bucks? For most people, absolutely not. If you were already the type to buy 700+ dollar video cards though and you're right on that razor edge of performance (e.g. 4K and VR) than it all comes down to how easily you can part with 1000+USD. I happen to be in the former extremely thin category (willing to spend, doing 4K and VR) and so for me it's a nice boost to 4K which I play quite a few games at on my TV. We'll see how much of a boost I get in VR later tonight.