Need explanation of the CPU and FPU technology on turbo boards

[derringer3]

@amidude

About a few month ago I played Oblivion game on pc, its got about 25-30fps avarage on the highest settings. Then I accelerate a little more my pc (ddr2 800MHz/Core2 CPU etc.)
I didn't notice the difference in most way, but fraps program show: now its about 35-40 fps.)

In amiga I try many fpu, with differend oscillators. I learnt that some programs wich use "3d" effect often speed up. (Try ambermoon, I tried with an 68000, 68010, 68030 with different MHz FPU-s. 20MHZ-24MHz-27MHz-32MHz Now its clocked at 40MHz, but my 68030 still 14MHz. You will see the difference.

That's true, that running assyncronously from the CPU, you got to checked, it's worth the effort. I think its depends mainly, which turbo board you use.

Anyway If You don't use any 3d game, or 3d rendering, sound converting application, you will not notice the difference, because its only 1-2%

[derringer3]

@kidkoala

I've got an a500 with m-tec 68030/68882 board
By "factory" default it contains a 68030/16Mhz which is clocked at 14,2MHz and a 68882/16MHz which have got a separet oscillator. This is clocked at 20MHz
So about the performance:
 
68882 at 20Mhz: 0.48Mflops
68882 at 24Mhz: 0.51Mflops
68882 at 27Mhz: 0.58Mflops
68882 at 32Mhz: 0.68Mflops
68882 at 40Mhz: 0.79Mflops

You should look at, that sometime you got smaller advantage, when the estimated performance at higher MHz is indicated that. So there is no linear advantage compared to MHz. The best output of course is that the two proccessor  working syncronously. (For example in my system 42MHz would be more effective than 40MHz, and maybe 43-44-45MHz. But a 50MHz 68882 will be faster than an optimalised syncronouly 42MHz.

Anyway a guy told that, in an other forum post, that his A1200 with Blizzard 1230-IV got an 50MHz FPU, and its got 1,33 MFlops.
If I'am able to overclock my 68882 to 50Mhz, I don't think its got 1,33 Mflops, probably 0,9Mflops.

Of course the bandwith of A500 bus and A1200 bus different a little bit.