Two drives : same buffer on all hard drives ?

I just ordered a SATA Maxtor drive 300G 7200, Buffer 16Mo (model 6B300S0) to add onto the second bay of my G5 DP 1.8 Ghz.
The original drive (that will be kept in place) is also from Maxtor, 80G 7200, Buffer 8Mo.
I just went by this article from apple support "http://docs.info.apple.com/article.html?artnum=300355".
It says
"Storage :
Two Serial ATA controllers supporting up to 150-MBps data throughput per hard drive
Two 3.5-inch hard drive expansion bays with drive guides for a second drive
One 80GB or 160GB 7200-rpm Serial ATA drive installed in standard configurations(5)
Support for up to two internal Serial ATA drives; 500GB maximum system capacity(5)
8MB memory buffers on all hard drives"
Is this "8MB memory buffers on all drives" restrictive, meaning there might problematic to have two hard drives running with different buffers ?
Thank you for any suggestion, I still have time to cancel my order and order another drive with 8 MB buffer before tomorrow..
Luc

Thank you for your reply,
As a matter of fact, the Apple report is from october 2004, and my machine from April 2005, not much further away. I have found an happy report in XRL8yourmac from sept 2004 describing no problem with the same drive in a Dual 2.5 GHz Power Mac G5 .
The writer says it ran faster than the original 250GB Maxtor 7Y250M0 (8Mo buffer), but did not say if the two drives are running allong well or if he did replace the 250 by the 300. I understood that we cannot instal more than 500 Gig total in a G5 this generation ??
My specific question is :
Is it any reason to think that running two SATA drives with different size buffers would be problematic ?
Many thanks
Luc

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