OK so I cleared my head and did some maths.
1800 cinebench 4000mhz.
So, for our 1800 CB score we are basically scoring 225 points per 1c/1t. So, 8 cores x 225 points = 1800.
So, if this were a 12 core CPU we would times the single core and thread score by 12, instead of 8. This, theoretically gives us a score of 2,700. Now we need to increase the clock speed to figure out what we would score at example, 5ghz. Remember, I am doing this linearly, meaning due to the linear way Cinebench scores I can add or remove cores and clock speeds to manipulate the end result.
So, at 4ghz or 4000mhz we score 1800 points. Our score at 1000mhz should be 1800 divided by four, so 450 cinebench points per 1000mhz. So 450CB x 4 (or 4ghz or 4000mhz) is 1800.
So, if we do this linearly we can now calculate what the 1800x would score at 5ghz. This should be an extra 1000mhz of CB points, so 450. So, theoretically at 5ghz we would score 2250 with a 8/16 1800x. Now to make it a 12 core we need to divide the score by 4 which would be 562.5. We then add that to the 5ghz theoretical CB score and we get score of 2812CB with 12 Ryzen cores running at 5ghz.
AMD are saying 70% or so faster than the 1800x which scores 1800 points. For a 100% gain we would need to double that score to 3600 for example. However, 2812 is right around 70%.
OK, so if that got a little confusing I apologise. Just remember I said it here first, If these rumours are true I predict the 12/24 @ 5ghz will score 2812 points in Cinebench.