everymac.com has all the answers!
Anyways, to clarify:
The original (WallStreet) came with several configurations, for screen and processor.
The 13 and 14" display models always had 4MB of VRAM and SVideo-out, regardless of whether they had the cheapest, cacheless 233MHz processor or the top-end 292MHz version.
The 12" STN was only available with 2MB of VRAM and no SVideo-out as further cost savings.
Also, all of these displays were incapable of resolution scaling (they were always fixed at 1024x768).
The second version (WallStreet II/PDQ) also had three display choices, but only three processor options.
The three displays were still 12, 13, and 14, but now the 12" was TFT and all models had 4MB VRAM and SVideo. The displays could also change resolution between 1024x768, 800x600, and 640x480.
The three processors were 233MHz, 266MHz, and 300MHz. All of them had L2 caches.
Hope I didn't induce any confusion...
BTW, the system bus frequency is determined by the MPC106 contained on the processor card, not anything on the system board. The PCI bus is always at 33.3MHz regardless of system bus speed. Thus, on the original versions anyway, a 292MHz/83MHz processor card can replace a 233/66MHz card with no issues. I've done it myself.
I have a 250/83 that I can swap into a second-version 233/66 to see if it can be done.
Anyways, to clarify:
The original (WallStreet) came with several configurations, for screen and processor.
The 13 and 14" display models always had 4MB of VRAM and SVideo-out, regardless of whether they had the cheapest, cacheless 233MHz processor or the top-end 292MHz version.
The 12" STN was only available with 2MB of VRAM and no SVideo-out as further cost savings.
Also, all of these displays were incapable of resolution scaling (they were always fixed at 1024x768).
The second version (WallStreet II/PDQ) also had three display choices, but only three processor options.
The three displays were still 12, 13, and 14, but now the 12" was TFT and all models had 4MB VRAM and SVideo. The displays could also change resolution between 1024x768, 800x600, and 640x480.
The three processors were 233MHz, 266MHz, and 300MHz. All of them had L2 caches.
Hope I didn't induce any confusion...
BTW, the system bus frequency is determined by the MPC106 contained on the processor card, not anything on the system board. The PCI bus is always at 33.3MHz regardless of system bus speed. Thus, on the original versions anyway, a 292MHz/83MHz processor card can replace a 233/66MHz card with no issues. I've done it myself.
I have a 250/83 that I can swap into a second-version 233/66 to see if it can be done.