Juko ST OEM motherboard @12MHz and 8087-1 @12MHz - Has anyone else had success?

[jasa1063]

I just posted on this computer from Bulgaria here:

https://forum.vcfed.org/index.php?threads/pravetz-16es-from-bulgaria-i-wanted-it-original-but-it-turned-out-better-with-upgrades.1244097/

I have a 8087-1 successfully running on this motherboard with heat sinks attached to it. My question is has anyone else had success running an 8087-1 on these 12MHz Super Turbo XT motherboards given how hot the 8087-1 runs to begin with.

 

[jasa1063]

CheckIt 3.0 reports 320.8K Whetstones for the 8087-1 in this system. For comparison my Juko Nest N3 NEC V30@10MHz w/8087-1@10MHz reports 331.6K Whetstones. I don't know if the 16-bit bus makes that much difference, but I would have thought that a 8087-1@12MHz would have the higher score.

 

[Chuck(G)]

Remember that the 8087 has to issue 2 fetches per 16 bits on a V20 setup, where only 1 on a V30. The V30 vs. V20 difference is enough to skew that. A good logic analyzer should show that.