CPU-IDLE 2.52  (The test)
 CPU-IDLE:  
Software used for the test CPU-IDLE version Results Operating System CPU Ratio
Quake 1.01 cpuidle 2.52 16.71 fpm Win 95 P200 MMX 96.37%
Quake 1.01 Off 17.34 fpm Win 95 P200 MMX 100%
GL Quake 1.09/0.94 cpuidle 2.52 32.645 
27.77
Win 95 P200 MMX 99.27% 
99.4%
GL Quake 1.09/0.94 Off 32.889 
27.9
Win 95 P200 MMX 100% 
100%
Quake 1.01 DosIdle 2.00 17.614 Dos 7 P200 MMX 101.17%
Quake 1.01 Off 17.41 Dos 7 P200 MMX 100%
Dr Hard 4.0e DosIdle 2.00 214,696.6 
80,030
Dos 7 P200 MMX 98.04% 
101.34%
Dr Hard 4.0e Off 218,993.6 
78970
Dos 7 P200 MMX 100% 
100%
 
 
Software used for the test CPU-IDLE version Results Operating System CPU Ratio
Quake 1.01 CpuIdle 2.52 16.25 fpm Win 95 K6 200 97.3%
Quake 1.01 Off 16.70 fpm Win 95 K6 200 100%
Quake 1.01 Dos Idle 2.00 17.52 fpm Dos 7 K6 200 99.15%
Quake 1.01 Off 17.67 fpm Dos 7 K6 200 100%
Dr Hard 4.0e CpuIdle 2.52 222,667.0 
50846.5
Win 95 K6 200 95.71% 
96.63%
Dr Hard 4.0e Off 232,644.5 
52618.8
Win 95 K6 200 100%
Dr Hard 4.0e CpuIdle 2.52 214,027.0 
65455.0
Dos 7 K6 200 99% 
99.87%
Dr Hard 4.0e Off 216,202.0 
65543.0
Dos 7 K6 200 100%
 

P200 MMX:

K6 200: Quake 1.01 Test: GL Quake: Dr Hard 4.0e: The RESULTS:

Cpu-Idle uses the HLT command and some other options tu speed-up the CPU, but a P200MMX doesn't have all of this features.
The K6 has also some features but not all.

Under Win 95:

This software make the processor run a little bit slower (1% to 3% less) but it is not important compared to the gain of temperature. And if you use a 3dfx Voodoo you can lose only 0.6% (which is not important compared to the 33fpm given by the 3D accelerator). The 3D accelerator lets the CPU win lots of cycles compared to the non GL version, and it explains that the loss of CPU speed is less important.
In a normal office use CpuIdle is completely transparent to the user, and enables the central processor unit to run cooler.
I didn't notice particular bugs, but some people say that CpuIdle has problems when running with a VX chipset.
I use a VX motherboard and I have no problems (I use CpuIdle 2.52 for more than twenty hours).
I also used a TXpro motherboard: a conflict with the sound card appear, I don't know why !  (strange sounds)
Maybe I should try to disable some CpuIdle Options.
Conclusion: Use it with Win95 if it works (it must run!)

Under Dos (7.0):

CpuIdle 2.52 works only under W95, you must use DosIdle 2.00 under dos.
I tried it some hours (one or two) and I think it works without problems. You can also use CpuIdle at the same time but if you work only with Win95 you should only use CpuIdle.
It takes 4Ko in conventionnal memory and is placed in Autoexec.bat to run as the dos starts to run.
You can choose to add some option if you encounter problems.
As you can see DosIdle is very special under dos because it seems to slow the INT and speed-up the FPU with p200MMX !
Quake is a 3D game, so it uses the FPU most of the time. It is why DosIdle can give 1% more !
If you don't have a 3D accelerator and you want to play under Dos you must use DosIdle to increase both your rate of frames per seconde and the expectation of live of you processor.
Dr hardware 4 shows the same results: Better FPU results (+1.34%)
                                                           Worse INT results (-1.96%)
                                                           Maybe better MMX results because MMX unit is more like the FPU than the INT.
With the K6 200, DosIdle doesn't take more than 1% (or less 0.1%) of the performances.  I think it is because P200 MMx and K6 200 have different features. But the K6 still very powerfull under Dos with DosIdle.