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PC2100

 
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cptpike
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PostPosted: Mon Sep 12, 2005 3:28 pm    Post subject: PC2100 Reply with quote

I've got a Mac Mini currently running the stock 256mb. I've also got an extra stick of 512 pc2100 laying around. I'm wondering, could I run pc2100 on the mac mini and would it be better than the current 256mb pc2700?
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g5g5
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PostPosted: Mon Sep 12, 2005 5:08 pm    Post subject: Reply with quote

I could be wrong but I don't think PC2100 is backwards compatible with PC3200.
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ahh
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PostPosted: Tue Sep 13, 2005 7:41 am    Post subject: Reply with quote

From apple's website:

Technical Specifications
Processor and memory
1.25GHz or 1.42GHz PowerPC G4 processor with Velocity Engine
512K on-chip level 2 cache at full processor speed
167MHz system bus
512MB of PC2700 (333MHz) DDR SDRAM, expandable to up to 1GB5


pc3200 = 400Mhz
pc2700 = 333Mhz
pc2100 = 266Mhz

I'm guessing since the system bus is 167Mhz there is a multiplier on the memory bus. Therefore, atleast 333Mhz is required. pc3200 is backwards compatable, pc2100 is insufficient. Of course, unless you overclock the ram. But I don't think you're looking to do that.

Hope this helps.
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Susurrus
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PostPosted: Tue Sep 13, 2005 8:57 am    Post subject: Reply with quote

You can run that RAM in your Mini, though it will be "slower" than your previous stick. You shouldn't really notice the loss of speed because the speed gained from not thrashing the swap as well as the fact that any applications that will demonstrate the speed difference between PC2700 and PC2100 RAM would probably not work too well on a Mini to start with.
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cptpike
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PostPosted: Tue Sep 13, 2005 9:26 am    Post subject: Reply with quote

Thanks for the info guys.
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Susurrus
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PostPosted: Tue Sep 13, 2005 3:22 pm    Post subject: Reply with quote

So what you end up deciding on?
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cptpike
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PostPosted: Wed Sep 14, 2005 11:05 am    Post subject: Reply with quote

Ha, nothing yet. I might slap the 512mb pc2100 in there just to see what happens. I would like to buy a one gig stick, but can't allocate the dough yet. I'll let you know what happens if I put the 512 in.
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liquidiq
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PostPosted: Thu Sep 15, 2005 11:39 pm    Post subject: Reply with quote

My "revB" 1.42GHz Mini came with PC3200 CAS3 memory (512meg). I upgraded to PC3200 CAS2 and so far so good.
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cleekj
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PostPosted: Tue Sep 20, 2005 8:19 am    Post subject: Reply with quote

I went to my local PC Club and bought some generic "Buffalo was the brand" PC 3200 cl3 memory, so far no problems. It was $119 vs $188 the Apple dealer wanted for the cl3 PC 2700 memory.......... Rolling Eyes
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cptpike
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PostPosted: Fri Oct 28, 2005 10:23 am    Post subject: Reply with quote

Susurrus wrote:
So what you end up deciding on?


I Know I'm reviving a dead thread but..... I finally added a 512mb pc3200 stick to the mini. I yanked it out of one of my spare pcs. I can tell a great improvement from the original RAM.
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AndyMac
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PostPosted: Fri Oct 28, 2005 7:56 pm    Post subject: Reply with quote

I took out the stick of 512 pc3200 and put a stick of 2700 1 gb in. I dont think much people will notice the difference between 2700 and 3200 unless you are xbenching your system.
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topos
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PostPosted: Sat Oct 29, 2005 9:09 pm    Post subject: Reply with quote

AndyMac wrote:
I took out the stick of 512 pc3200 and put a stick of 2700 1 gb in. I dont think much people will notice the difference between 2700 and 3200 unless you are xbenching your system.

You won't notice any difference between pc3200 and pc2700 in a mini as the G4 cannot access the memory at DDR400 (PC3200). When you put PC3200, it downclock it to PC2700.
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AndyMac
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PostPosted: Sat Oct 29, 2005 10:15 pm    Post subject: Reply with quote

topos wrote:
AndyMac wrote:
I took out the stick of 512 pc3200 and put a stick of 2700 1 gb in. I dont think much people will notice the difference between 2700 and 3200 unless you are xbenching your system.

You won't notice any difference between pc3200 and pc2700 in a mini as the G4 cannot access the memory at DDR400 (PC3200). When you put PC3200, it downclock it to PC2700.


My machine did read it as pc3200. I wonder why apple put 3200 in if it would not take advanatage of it?
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Ranter
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PostPosted: Sun Oct 30, 2005 10:24 am    Post subject: Reply with quote

AndyMac wrote:
I wonder why apple put 3200 in if it would not take advanatage of it?


Perhaps because it was available at a time when PC2700 was not?
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