quick gazelle-vs-alchemy graphics question

[chelseayr]

just have to wonder (and create a separate thread for that in case this one becomes less than very short you know) but..

in here

Post in thread 'Found the 50MHz bus switch on Alchemy (5400/6400)'

Jan 5, 2025

I think these Norton System Info v5 Benchmarks are pretty interesting:



All tests done in a Performa 6360/160 chassis (including with the 6500/225 board), same 64MB EDO DIMM installed on the logic boards and booted from the same Mac OS 8.6 install on a 160GB PATA HD.

My takeaways:

1. Going from a 160MHz 603ev on a 40MHz bus to a 150MHz 603ev on a 50MHz bus is overall a wash.
2. At the ~same CPU clock speed the main benefit of the 50MHz over 40MHz bus is video and disk performance.
   1. The benefit is there is greater if you have a G3 upgrade (20% improved video...

• Fizzbinn

is specifically mentioned "The 6500/Gazelle logic board's improved graphics aren't matched by Alchemy at 50MHz (not that surprising)", does that mean the stock gazelle and 'accelerated' alchemy graphic cores are very similar benchmarks by then or am I misreading that?

I know that stability seem to be an issue with the alchemy's overclocking but even then I simply had to wonder for now nevertheless

 

[obsolete]

My interpretation of those benchmarks is that the ATI graphics chip on the Gazelle board handily outperforms it's predecessor, Apple's Valkyrie chip on the Alchemy board, regardless of bus speed.

I did not experience any stability issues with my Alchemy board at 50MHz.

 

[Powerbase]

Did the Valkyrie even do 2d acceleration, wasnt it just a fancy frame buffer? The ole ATI Rages weren't the fanciest but I always found then to be pretty speedy 2d-wise.

 

[obsolete]

@Powerbase dunno. I did enough searching to get here https://68kmla.org/bb/index.php?thr...onto-quadra-630-motherboard.31632/post-523974
but don't have time to ingest that document at the moment.

 

[chelseayr]

I see the meaning now, thanks for your reply obsolete