Would is make much sense (speedwise) to upgrade memory chips on ISA video card from 80ns to let's say 10ns? Any opinions or experiences in that matter?
Thank you.
upgrade memory chips on ISA video card from 80ns to let's say 10ns?
Impossible. If memory chips are marked as "10" - that's actually 100ns.
Would is make much sense (speedwise)
Without card BIOS editing or some utility to change parameters online - no.
I must be some kind of standard: the anonymous gangbanger of the 21st century.
Impossible. If memory chips are marked as "10" - that's actually 100ns.
I did not know that. Thanks.
If is says "20" that's 200ns?
Without card BIOS editing or some utility to change parameters online - no.
Then switching 80ns chips to 70ns would make absolutely no difference?
Well to qualify that, the type of chips you'll find that fit your sockets will be coded 10 for 100 ns, 12 for 120, 8 for 80, 7 for 70, 6 for 60... Chips on SDRAM DIMMs will be way different density and pinout and on those 10 will mean 10ns. Personally, I don't like to see a card with worse than 70ns on, but really gotta be pushing an ISA card hard for it to make much difference, and older ISA cards just won't take advantage of faster RAM. Now on VLB cards where you're running upwards of 40 or 50 Mhz on the bus it starts to show.
Unicorn herding operations are proceeding, but all the totes of hens teeth and barrels of rocking horse poop give them plenty of hiding spots.
mat919 wrote on 2021-05-30, 02:11:Then switching 80ns chips to 70ns would make absolutely no difference?
The graphics chip has no idea about the speed the ram chips can handle. It's made to run at a certain speed and using faster memory will have no effect.
Personally, I don't like to see a card with worse than 70ns
That's pretty much useless for many ISA cards, because memory speed is clocked with ISA bus. I've experimented with Trident 8900D and 100ns memory and it worked just fine even on 20 Mhz ISA bus. Switch to 70ns or 60ns could benefit some VLB cards without independently clocked RAM, i.e. make it work stable at 40 or 50 Mhz VESA bus.
I must be some kind of standard: the anonymous gangbanger of the 21st century.
Well yah, that why I said "like".. if I know they got 100ns on they feel slower, it's like audiophile stuff, the tone of the pixels is warmer and fuller with 70ns 😜
Unicorn herding operations are proceeding, but all the totes of hens teeth and barrels of rocking horse poop give them plenty of hiding spots.
DRAM speed rating is just like a processor's speed rating in the sense that:
1) they very often work fine overclocked with no drawbacks compared to using an appropriately rated part
2) the rest of the system CANNOT detect the speed rating, changing a 200ns memory IC for a 70ns one will not do jack shit unless you physically alter the circuit to change the timing (same as if you swapped a 25MHz 386 for a 33MHz one without changing jumpers or crystals)
Yes true, you can't make it faster when it's hardwired to use what it's got.
Unicorn herding operations are proceeding, but all the totes of hens teeth and barrels of rocking horse poop give them plenty of hiding spots.
if I know they got 100ns on they feel slower
Go GDDR6x or go home!
I must be some kind of standard: the anonymous gangbanger of the 21st century.
Thank you. I got the point. I saved about $20, cause I was going to get the chips.
