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 Post subject: Has anyone done real memory mods - not overclocking?
PostPosted: Sat Dec 18, 2004 11:08 am 
8086
8086

Joined: Sat Dec 18, 2004 10:36 am
Posts: 1
Has anyone done real memory mods, not just overclocking?

For example:
. USB keys for disk storage using software striping
get 80 MB/second, 1 millisecond access over USB 2
. USB keys for disk storage using hardware striping in SCSI
get 640 MB/second, 2 millisecond access over SCSI adaptor
(the above 2 should throttle back so as to not cause
interference with other main memory access)
. cache memory using 64 MB or more of 10 ns memory

Why overclock by less than 1 factor of 2 when you can have
disks and memory that is 20 to 40 times faster?


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 Post subject: Re: Has anyone done real memory mods - not overclocking?
PostPosted: Sun Dec 19, 2004 8:27 pm 
King of All Voodoo2 Cards
King of All Voodoo2 Cards
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Joined: Tue Jun 22, 2004 10:41 am
Posts: 9316
mfineman3 wrote:
. USB keys for disk storage using software striping
get 80 MB/second, 1 millisecond access over USB 2


Someone has already done it and the results weren't all that impressive, quite far from 80MB/sec, which I see as an impossible number to reach unless you've got multiple USB2 Root Hubs (which would eat up valuable PCI slots), along with high speed flash memory.

Probably 4x cheaper just doing it with 2 external 7,200RPM notebook drives.

mfineman3 wrote:
. USB keys for disk storage using hardware striping in SCSI
get 640 MB/second, 2 millisecond access over SCSI adaptor
(the above 2 should throttle back so as to not cause
interference with other main memory access)


Building an Ultra640 to USB2 interface is impossible due to the signaling and electrical limitations of both devices, and because of the internal speed of the flash memory, you'd never come close to 640MB/s

mfineman3 wrote:
. cache memory using 64 MB or more of 10 ns memory


SRAM would be faster and the choice I would use but obscenely expensive. If you really want one, Cenatek will sell you one with between 256MB and 4GB of 7.5ns memory (ie, it's been done already)


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