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Amiga computer related discussion => Amiga Marketplace => Topic started by: kronuz on June 15, 2013, 11:34:09 PM
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I'm looking to buy the Doubler 4000, or compatible to double a3640 from 25mhz to 50 mhz or more.
The CPU board is commonly found in Macintosh Centris, Quadra or WGS 60
http://amiga.resource.cx/exp/quaddoubler
I am also interested in more info on it and want to find out what this retail-included extraction tool looks like.
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Gosh, I wish I had known sooner. I just pitched my old Mac with one last week.
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The last one I saw for sale was going for about $400.
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Gosh, I wish I had known sooner. I just pitched my old Mac with one last week.
Darn it :/
The last one I saw for sale was going for about $400.
The last I saw went for 70USD...
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There is nothing special about QuadDoubler.It is a simple case
of replacing 25 Mhz 040 that came with most Quadras with 40 Mhz
one usually clocked at 2 x 25 Mhz = 50 Mhz .At 040 Macs CPU would
run at system clock externally (fastest system clock is Quadra AV I think
it was 33 Mhz) and at 2 x system clock internally so because of
that some stores would advertise 50 Mhz QuadDoubler as 100 Mhz.
It has fast(er?) memory on the card though and you can add CPU
cache memory to it.
I only noticed some improvement when adding cache myself ;)
Best way to get one is to buy whole Quadra that has one inside.
Somehow you will get it cheaper this way :)
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The last one I saw for sale was going for about $400.
Really?? Are they that rare?
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Really?? Are they that rare?
This was the plus version with an extra cache, and yeah, they're rare.
Also, an '060 would outperform it in the same system (at the same speed) while running cooler.
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yeah I could go with another card, but the quaddoubler is all about ( maybe) cheap performance....and also it is fun to test something that many people might never heard about at all .