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There may not be support on the Xeon 3500 integrated memory controller for anything above 4GB, but the Xeon 5500 does support 8GB and 16GB DIMMs so it would be an artificial limitation imposed by Intel.
 
Not true... if you have 4x2GB sticks (8GB), the first 6GB or memory is split across three channels and will provide full memory bandwidth. The last 2GB is attached to one of the channels and doesn't gain the benefit of multi-channel bandwidth (access is effectively single channel on the last 2GB).

Thank you! Finally someone posting with sense!!

Sets of 3 chips will be linked together in tri-channel mode, while an extra chip or two (before the next set of three) will operate with a slightly slower throughput. But, it's just that extra chip -- any sets of three will always be in the faster tri-channel mode.
 
Thank you! Finally someone posting with sense!!

Sets of 3 chips will be linked together in tri-channel mode, while an extra chip or two (before the next set of three) will operate with a slightly slower throughput. But, it's just that extra chip -- any sets of three will always be in the faster tri-channel mode.

I said this earlier today and nanofrog commented that he had looked at documentation and it may be that all memory is accessed in tri-channel, it will just switch between the first and second DIMMs on the first channel as needed adding latency.
 
You could get a Quad with 32GB RAM. And now you can only get 8GB with 4 slots.



Really strange downgrade.

Doesn't really effect me, I've only got 2GB in my 8Core but thats cause I'm poor. :p

But still WTF?!

Its simple logic if you need more then 8 gigs of ram then you are most likely going to be doing something that can take advantage of more processors.

Why do you say this is a downgrade?
 
Its simple logic if you need more then 8 gigs of ram then you are most likely going to be doing something that can take advantage of more processors.

Why do you say this is a downgrade?
Previously there was an option for quad-core + >8 GB RAM. Now there isn't.
 
Its simple logic if you need more then 8 gigs of ram then you are most likely going to be doing something that can take advantage of more processors.

Why do you say this is a downgrade?

While that may be the case for some it certainly isn't for others. In the end more memory won't do any harm and as unbuffered ECC DDR3 is $25/GB it is a cheap way to improve performance, but Apple are limiting that path.
 
Its simple logic if you need more then 8 gigs of ram then you are most likely going to be doing something that can take advantage of more processors.

Why do you say this is a downgrade?

Ah... base model went from:

8x cores and MAX 32GB ram to 4x cores and max 8GB ram.

That to me qualifies as a downgrade.

There is no way 4x cores will be faster than 8x cores.

Same as the base 24" imac that now comes with integrated video like a cheap pc.

Apple really dropped the ball. :(
 
That is incorrect if your App that only spawns one thread it won't matter if you have 4 cores or 1000 it won't make the App any faster.

Sure because people that buy a mac pro use it to browse the web!

Any professional video, audio, scientific or 3D rendering uses all cores to the max. That is the reason people get a mac pro instead of an imac or an mpb.

If I had the cash now I would get a new 2008 mac pro 8x core at 2.8Ghz unfortunately I don't so I guess I'll have to get by with my Imac for a while longer.
 
??? Thats why I am getting mine... Well that and watch adobe flash movies, I just hope it is enough.

Yeah I know what you mean with the flash stuff. The cr@ppiest technology ever invented sucks CPU cycles and battery on an mpb like there is no tomorrow.
 
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