Reply 20 of 30, by Kinoli
Garrett W wrote on 2021-06-01, 13:28:Kinoli wrote on 2021-06-01, 13:03:megatron-uk wrote on 2021-06-01, 10:34:
With respect to the CL 5428, it's a really good Dos gaming chip - I don't know if your board has it connected via ISA or local bus; if it's ISA and you have a VLB/PCI slot free, then a VLB/PCI card would be a good upgrade (the ISA bus is a big bottleneck for games like Doom that push a lot of pixel data). If, however it's it's already a VLB connection (either in a slot or embedded on the motherboard itself) then you'll not gain much for changing to another card, certainly not for Dos games.
The video card is soldered onboard, so I imagine it is via local bus? I only have ISA-16 slots, that's where my Sound Blaster Network adapter goes. If I can squeeze a little bit of performance out of the machine changing the CPU, I'll definitely do that.
No, unfortunately that's not guaranteed. We'll have to take a look at the documentation and see how it is connected. My bet is that it is ISA, which would in turn make Doom run a lot worse and perhaps further explain your disappointment. I tried looking around with the model you provided, but I couldn't find it, are you sure it's the HP Vectra 486/25M? Could you take a couple of photos of the case as well as the internals, mainly the motherboard? That would help immensely.
For some reason, I got confused writing the vectra model, I will edit my op. It is a 486/25VL.
Here you have the photo. If this is not enough, I can do a close up on the graphics part.
About the overclocking, my father-in-law has a 486DX/33 and a 486DX2/66 for some reason, so I will be using the DX2 to upgrade the CPU. I will have to look up a heatsink that fits , and probably a fan too.