Date: Fri, 29 Dec 1995 14:43:38 -0500 (EST) From: Rashid Karimov <rashid@rk.ios.com> To: davidg@Root.COM Cc: techadm@elvisti.kiev.ua, hackers@freebsd.org Subject: Re: ASUS P6/Pro MB and P6-200 Message-ID: <199512291943.OAA10908@rk.ios.com> In-Reply-To: <199512291627.IAA02730@corbin.Root.COM> from "David Greenman" at Dec 29, 95 08:26:46 am
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Hi there folx, > > > After jkh@ posted here about his intentions to get > > latest ASUS Ppro motherboard and 200Mhz CPU I decided > > to get one here too and well, here it is now :) > > > > Runs just fantastic ! - in full accordance with expectations, > > but the problem is I can't find 200 Mhz CPU. > > The motherboard is shipped from ASUS with 150Mhz CPU and it's > > not clear who carries the 200Mhz one ? > > > The biggest problem with the ASUS P6 motherboard is the poor PCI > performance. DMA writes to memory are very slow because the PCI write buffer > is disabled. It's disabled to work around a bug in the Intel Orion chipset > that causes the data to get corrupted if it is enabled. With it disabled, the > top performance of PCI DMA writes to memory is about 4.4MB/sec. This is too > slow for fast (100Mbit) ethernet, for example, and causes half of the packets > to get dropped. Hmmm ... interesting ... does it mean that those ppl from ASUS will come up with some workaround for it later - when the problem will be fixed , or I will have to live with this sad limit ? :) Personally I didnt mention that the PCI is _that slow ... At least the AHA 2940 I have here work pretty fast - I run some pretty simple tests , like cp'ing ~40Mb file into /dev/null and saw the read speeds ~ 7 - 8 Mb sec off the Seagate Barracuda 2 Gb. Too bad for ASUS ... doesn't make any sense to me - I mean buying these MBs , now that I know about this :(( Rashid
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