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andboom

macrumors member
Aug 8, 2007
40
23
London
Which Core 2 Extreme?

Whilst I'm aware others have speculated on what the exact processor id is of the Core 2 Extreme, there seems to be some conflicting information. I see Intel make a quad-core Core 2 Extreme QX6800, a mobile-class Core 2 Extreme X7800 and a desktop-class Core 2 Extreme which I can't find the model number for.

Firstly, is the Extreme chip used in the new iMac a desktop or a mobile processor?

Secondly, is this a dual core or a quad core processor?

Thirdly, can some of the early adopters of the new Core 2 Extreme and Core 2 Duo iMacs please give us some performance benchmarks showing the difference between this and the Core 2 Duo model with identical RAM, GPU and device setup? Perhaps timing how long it takes to encode an identical video clip for Apple TV or iPod, for example?

As many people have rightly pointed out, it's important to specify what applications the user wishes to run when asking if the upgrade to an Extreme processor will make a significant difference. I intend to use the iMac for music recording and sequencing using Ableton Live 6 (which is written to take advantage of multiple Intel processors) and possibly Logic Pro 7. Like all musicians, I am looking for lower latency and being able to play back more tracks at once (using processor-hungry software synths such as Native Instruments Kore, Absynth, Massive etc). How significant are the performance benefits likely to be in terms of recording latency and number of tracks if I went for the Core 2 Extreme 2.8Ghz model over the Core 2 Duo model?

Failing that, what about performance benefits for render times in Final Cut Pro 6? Thanks for any help :apple:
 

Mollemand

macrumors regular
Aug 1, 2007
147
0
I see Intel make a quad-core Core 2 Extreme QX6800, a mobile-class Core 2 Extreme X7800 and a desktop-class Core 2 Extreme which I can't find the model number for.

Firstly, is the Extreme chip used in the new iMac a desktop or a mobile processor?

Secondly, is this a dual core or a quad core processor?

I think I can manage your first two questions at least :)

1) The iMac uses intel mobile technology processors. While people are speculating about the correct ID for the Core 2 Extreme, it is in the 7000 series.

2) The processor is a dual core. I am quite sure Apples fantastic marketing-member would have let you know if it was a quad core...

Apple does not use the Intel core 2 desktop series, also known as the 6000 series, whether it be the quads, extremes or the duo. They would not fit in a iMac due to their heat output, and Apples noise tolerances.

Sorry, I can't help you with the rest
 

andboom

macrumors member
Aug 8, 2007
40
23
London
Thanks for your help!

Don't know if anyone has compared them yet, but can anyone quantify the difference in performance between the mobile 2.8GHz Core 2 Extreme used in the new iMac and the 2x 3.0GHz Xeon processors used in the 4 core (as well as 8 core) Mac Pro when say, encoding H264 video for Apple TV / iPod using Quicktime Pro?

It would be great to see a direct comparison for H264 encoding (for iPod) on all the latest Apple iMac, Macbook, Macbook Pro & Mac Pro machines. Could be a bit of a mission though... wish Apple could provide these stats.


If anyone can help my other questions (see above) too I'd be very interested... Thanks.:)
 

Eidorian

macrumors Penryn
Mar 23, 2005
29,190
386
Indianapolis
Thanks for your help!

Don't know if anyone has compared them yet, but can anyone quantify the difference in performance between the mobile 2.8GHz Core 2 Extreme used in the new iMac and the 2x 3.0GHz Xeon processors used in the 4 core (as well as 8 core) Mac Pro when say, encoding H264 video for Apple TV / iPod using Quicktime Pro?

It would be great to see a direct comparison for H264 encoding (for iPod) on all the latest Apple iMac, Macbook, Macbook Pro & Mac Pro machines. Could be a bit of a mission though... wish Apple could provide these stats.


If anyone can help my other questions (see above) too I'd be very interested... Thanks.:)
More cores are going to easily win. You have more CPU time to work with.
 

jfpoole

macrumors newbie
Oct 27, 2003
16
0
How would the iMac Core 2 Duo or Extreme stack up against, say, an Intel Quad 6600 or an AMD X2 5600+?

You can use these PC Performance and Mac Performance to see how Macs stack up against various Intel and AMD processors (the charts are generated using Geekbench 2 scores).

So, taking a look at the processors you mentioned, you'll get the following scores (higher is better):

Intel Core 2 Quad Q6600: 3771
iMac Core 2 Duo @ 2.4GHz: 3243 ([from here](http://browse.geekbench.ca/geekbench2/view/13404))
AMD Athlon 64 X2 5600+: 2906

So it looks like the iMac @ 2.4GHz is faster than the 5600+, but slower than the Q6600.
 

oduinnin

macrumors regular
Aug 3, 2007
139
0
Planet Earth
I'm getting the 2.8GHz - here's why ...

I do a lot video editing for family and friends. Coding, compressing and writing to DVD on my tired old PM G4 with upgraded 1.4GHz CPU and 32MB ATI Radeon video card is painfully slow. I hit the button before retiring for the night. So, I figure the more speed I can squeeze out the better. Please don't think I'm some kind of elitist (which I was called on another forum site), but, at my age and good employment $250 won't bankrupt me. Also, the Apple Specialist store I'm buying through, is going to pull out the the two 1GB RAM modules and install two 2GB RAM modules for me for $144. :cool:

I'm expecting a huge increase in productivity.

I've looked around the net a bit myself for information about this CPU and found nothing of note that hasn't already been mentioned. I'm disappointed that Intel doesn't have anything on their own web site. I've also noted that some early reviewers are calling this an overclocked X7800 2.6GHz Extreme, yet others are saying it's an entirely new X7900 running at 2.8GHz without overclocking! We aren't likely to know until someone gets there hands on one of these and checks it out.
 

flopticalcube

macrumors G4
Ok now somebody explain this thing about the graphics card. Apple lists it as ATI 2600 Pro 256MB with GDDR3, right? But all of the bad statistics that are showing up are for the 2600 pro with DDR2. Is this another unreleased component or what?

There's a rumor going round that the iMacs use a special version of the HD2600 that is closer to the XT.https://forums.macrumors.com/threads/339616/
 

Lazy Cat

macrumors newbie
Aug 6, 2007
5
0
South East England
I've been delving into this whole issue about the 2.8GHz vs 2.4GHz, is it worth it? :confused: I was a bit stuck at first, but decided to go with 2.8GHz as its going to make quite a difference in speed - people are saying 16.7%.

I chose 2GB RAM for my 24", more than 2GBs doesn't really do a whole lot I'm told, especially for the extra cost! So i chose the better chip over excessive amounts of RAM is what I'm saying.

Also, just to say I've heard alot it is the X7900, which isn't even out yet, but to be released soon.

BLOODY RUMOURS!! :rolleyes:
It's a bit annoying :apple: did'nt make it clearer about the two chips, guess we just got to work these things out ourselves!:(
 
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