The Evergreen MxPro (TM) is an "Upgrade for Pentium Processors (R)".  This upgrade replaces your current processor with a 180 MHz or 200 MHz processor, depending on the version you purchase.  The MxPro (TM) (seen at right) will fit in the Ziff socket of any socket 5 or socket 7 system.

These features give you increased performance and allow you to run the latest MMX (TM) enabled software on your system.

• is easy to install, takes 5 to 10 min;
• is a compact one-piece unit with fan and heatsink all attached;
• has twice the L2 cache of an Intel Overdrive;
• 95% of all 75 MHz and above systems are compatable with the MxPro;
• can process all MMX instructions;
• is socket 5 and socket 7 compatable;
• costs less than similar upgrade options;
• contains the IDT WinChip C6 processor, which is the first CPU designed to run specifically on Windows95.

I then ran Wintune and what I found was interesting.  Wintune was identifying the MxPro as a 486 running at 169 MHz.  I found that by setting my systems clock multiplier to 3.0X, the Wintune results then read 170.  "What is going on?" I asked myself.   Apparently the WinChip found in the MxPro is so new that the various benchmark programs do not know how to identify and test it properly.  This interesting fact can be seen in the chart below.
 

Also, Evergreen included a utility to benchmark your system before and after the upgrade.  For example, my boss's PB 600 motherboard, 100 MHz with no L2 cache, went from 67,303 Dhrystones to 127,268 Dhrystones with the 200 MHz Evergreen MxPro (TM).
 
 

To really tell how well the MxPro performed, I had to load Winbench on my system.   This is an extensive benchmark utility that tests the computer in real world examples of the most popular software titles available today.  The IDT Winchip in my Evergreen scored quite well, though unfortunately I do not have anything to compare it to other than my 233 MHz processor.  The MxPro I tried scored just behind the 233 MHz Processor, as I expected.
 

This Winbench test was done on the same standard PB 640 system, with 256k L2 cache, 48 MB RAM and a Stealth II S220 video card.  Performance will vary between systems.

From the testing and scores I could come up with, it shows the MxPro is competitive with the Intel chips.  A 200 MHz MxPro on a system with L2 cache can outperform a 233 MHz Intel processor with no L2 cache.  The MxPro should also score well on systems with no L2 cache, since the MxPro has more L2 cache than an Intel Pentium chip has.

Unfortunately my data and testing hardware are limited to what I have on hand.  I would, however, say the Evergreen MxPro (TM) performed quite well in all my testing, and the MxPro was just as stable and almost as fast as my Pentium 233 MMx processor.  The biggest advantage, however, is the MxPro is about $100 less than my 233 MHz processor and performed almost as well.