9550 Samsung 5.0 ns RAM question

[marty]

I was looking at the MSI Radeon 9550 128MB (RX9550-TD128) and according to the specs it's a 128-bit card.

Now, I know that web pictures are often representative and not necessarily those of the actual product. But, if you look at the picture of this card, you can notice that the RAM chips are "K4D551638F-TC50" which the techPowerUp chart says are "256 MBit 'F' die / 5.0 ns / TSOP-II 66".

Is there any way to tell from the BIOS collection which Samsung 5.0ns BIOSes would be compatible with this card? Surely, BIOSes for a different Samsung 5.0ns chip, for example, the "K4D263238F-QC50 / 128 MBit 'F' die / 5.0 ns / TQFP 100", could be quite different, right?

[Dedodido]

I'd say it's best to wait until you actually get the card before you try to find a bios, the make of RAM you get on the card can vary greatly. for example, I recently got a Saphire 9550, expecting it to either have Samsung or Mezza RAM, and instead it had Hynix.

[marty]

I understand what you are saying about waiting to actually have the card.

Maybe I worded my question poorly. What I was trying to ask was, is there any way to distinguish from different implementations of the same make and speed of RAM chips in the BIOS Collection? That is, the BIOS Collection only details as far as manufacturer and speed, for example, "Samsung 5.0 ns".

But, according to W1zzard's video card memory chart "Samsung 5.0 ns" could come in any of the following packages:
Samsung K4D261638E-TC50 128 MBit 'E' die 5.0 ns TSOP-II 66
Samsung K4D551638D-TC50 256 MBit 'D' die 5.0 ns TSOP-II 66
Samsung K4D263238F-QC50 128 MBit 'F' die 5.0 ns TQFP 100

And wouldn't these different types of "Samsung 5.0 ns" chips be instructed differently in the BIOS? Or, are these chips identical as far as a BIOS would be concerned and that the only real differences between them would be their physical package - small outline package vs. quad flat package (and even others that come in ball grid array)?

Wouldn't BIOSes that are memory chip specific be more likely to be cross-vendor compatible than those that are simply manufacturer and speed specific? That is, if I want to flash a 9550 with Hynix HY5DU561622CT-33 3.3 ns chips (256 Mbit, TSOP-II 66), wouldn't a 9600 BIOS from a card with the same Hynix HY5DU561622CT-33 chips be a better match than a 9600 BIOS with Hynix HY5DU283222AF-33 3.3 ns chips (128 MBit 'PC' die, uBGA 144)?

And would there be any way to work that info into the current BIOS collection?

[Dedodido]

I don't think it matters about the different chips, because as long as you have the size, speed and make right, you should be ok.