Problems? See this thread at archive.org.
ok.. so im trying to install some new RAM (kingston acer RAM at 4GB...)
i have the latest BIOS (v 1.44) for my Aspire 5720Z.
when i try to start with the new RAM i get a PFN_LIST_CORRUPT BSOD.
anyone have any suggestions?
i know that 32 bit vista only supports about 3-3.5 GB of RAM, but someone told me that it would just ignore the excess. They also told me that i could not get a 1G stick and a 2G stick because it was dual channel.. or something like that.
anyways, any help would be greatly appreciated.
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Memory access mode in multi processor systems is a very technical area indeed and I last tuned an OS in the mid 80s when things were measured in bits and bytes and I was trying to optimise the multi user performance of 256k of core and a 4.8Mb overlay (swapfile) disc.
In my 5315 CPUZ reports that the chipset is running in Symmetric mode with 3Gb of RAM (according to CPUZ 1.46).
This may appear odd, but although some simple theory assumes that there is an equal probability of a memory request going to any part of the physical memory - this can't be true or cache memory wouldn't exist.
Intel got badly burned by the high performance of AMD's Athlon 64 architecture with its on die memory controller and until the fightback with the recent generations of multicores had to exist at the high end by clocking the P4 ever higher and adding lots of clever cache.
To make this approach work at all well, Intel must have done a lot of analysis of real world memory access so that it could optimise its cache designs and Intel has always had some very good engineers.
Once it analysed the real world memory access data, good cache design principles could be adopted by any of their products that need them and laptops in particular are quite likely to be user upgraded with dissimilar memory chips.
Sadly Intel engineers don't seem to buy Acer laptops so we may never know for sure.....
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The 2+1 GB ram will run in asynchronous dual channel mode. You'll probably see an extra 3% performance boost, not much
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Dual-Channel doesn't give much of a boost on intel systems, and since you have a 32-bit OS, there is no need to even think above 3GB. For a more noticeable performance increase, get RAM with lower latency.
(And btw, what is the STOP error code ? 0x4E ?) -
Hmmmm ... hey take this back ... or i will imagine , that you are a pathetic old fashion, AMD Athlon lover .
The Dual-Channel , are one technology that really works .
The benefit its not visible to the naked eye , TRUE .
By the same prospect , and one HD with 8MB cache looks alike with one with 16MB .
The question are ... Does the user do large file transfers to multiple sources by the same hard disk ???
If yes he will see the gain .
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These are theoretical figures, and there is alot more to memory performance such as Latency, Chip Size etc
RAM tranfsers data in "strobes". Just like a strobe light, it cycles on and off. Well, what dual channel does is offset each pipe so that one stick is strobing on, while the other is off.
Same is with the HDD cache, the difference b/w 8MB and 16MB cache is noted in the slight increase in R/W times in synthetic benchmarks with 16MB cache, and large file transfers over a sustained period of time. Again, there are other factors that contribute more to the performance of an HDD, i.e. spindle speed, areal density, effective partitioning, no. of platters vs size etc etc.
In both the cases, the advantages of D/C RAM and HDD Cache are not noted in real-world performance.
D/C Channel RAM is actually more efficient on AMD systems (I have never owned an AMD system in my life), and I despise Intel for that.
Pfn_list_corrupt
Discussion in 'Acer' started by psolms, Aug 12, 2008.
