idiotSavant wrote:. . . there are only three definite advantages to the iMac in my way of thinking: 1) 32 gb RAM capability vs 16 gb limit in the Mini; 2) dedicated graphics processor in the iMac vs onboard graphics processing in the Mini. For most music applications, I don't really see this being an issue; and 3) the iMac comes with 7200 RPM hard drive rather than the 5400 in the Mini. This could be a significant concern for music production, but I plan on getting a Fusion drive in either machine, so the majority of the processing will be from the SSD portion of storage.
It is important to be able to have more than 16GB of memory, and I have observed the Mac Pro here in the sound isolation studio using more than 16GB of memory ocassionally, mostly when I do ReWire 2 with Digital Performer 8, NOTION 4, and Reason 6.5 and there are a lot of instruments both in NOTION 4 and Reason 6.5, as well as perhaps 50 tracks in the Digital Performer 8 . . .
I did a quick test with a 64-bit ReWire 2 session where Digital Performer 8.04 was the ReWire 2 host controller and NOTION 4 and Reason 7 were ReWire 2 slaves, which included running Screenflow 4.0.2 to capture real-time audio and video to increase the workload, and the Mac Pro was using only approximately 6GB of memory, but as noted I have seen memory usage a bit over 16GB, and in this quick test I was not recording anything in Digital Performer 8.04 or using NOTION 4 External MIDI staves to control Reason 7 synthesizers, but there are several instances of MachFive 3 with large in-memory sampled sounds . . .
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NOTE: The rectangular box with green vertical bars shows the percent utilization of the 8 cores . . . ]
Activity Monitor ~ Mac OS X 10.8.3 (Mountain Lion)It is obvious that all 8 cores are being utilized and that they are approaching 50 percent utilization, which is a bit disturbing but not yet troublesome, and as partially explained in my previous reply, this is what I expect to happen on a computer that has a bit of a throughput bottleneck due to a slow video card, where what happens is that with a slower video card which also has less video memory, the processors and main memory need to do a bit more work, as well as simply waiting every so often for the slower video card to finish its work, hence the percent utilization of the 8 cores has a few caveats, and I expect it to drop when I add the faster video card which has considerably more video memory . . .
This makes a nice segue to the importance of video processing when doing digital music production, where even though the focus is on audio, there is a lot of stuff happening visually, which is all the more the case when you are using certain types of effects plug-ins, with a metering section plug-in that has a real-time spectrum analyzer being an example . . .
Having a fast internal hard drive or an SSD drive is important, so the difference in a 5,400 RPM internal drive and a 7,200 RPM internal drive is significant, although perhaps more in terms of initial loading. recording, rendering, and bouncing to disk . . .
The importance of internal hard drive speed and performance also depends on the way the various VSTi virtual instruments handle and process their sampled sound libraries, where for example MachFIve 3 loads all the sampled sounds for a particular instrument into memory, which can take a while on the Mac Pro here in the sound isolation studio (perhaps a minute for an highly sampled instrument), but once the sampled sounds are loaded into memory, the relative speed and performance of the internal hard drive(s) becomes less important, but the general rule is that faster is better for internal hard drives . . .
Another advantage of getting a Mac Pro is that you can add a PCI Express SSD card, which currently is expensive for Mac users but is lightning fast, noting that these types of cards are less expensive for Windows machines and that the ones designed for Windows machines generally do not work on the Mac, so you need to get one that is designed to work on the Mac, although the prices h have dropped considerably over the past few months, where the 500GB card costs approximately $750 (US) and the 1TB card (960GB) costs approximately $1,300 (US), which is a lot of money here in the sound isolation studio, hence at present is nice to ponder but not practical . . .
OWC Mercury Accelsior_E2 PCI Express SSD (Other World Computing)There are other types of SSD drives for the Mac, and it is possible to use a smaller capacity OWC Mercury Accelsior_E2 PCI Express SSD for only the operating system and perhaps the three primary digital music production applications that I use (Digital Performer 8.04, NOTION 4, and Reason 7), which makes a difference in throughput and overall performance, plus maps to rapid application loading times and can make rendering and bouncing to disk significantly faster when the work is done on the SSD card but later copied to an internal hard drive . . .
Yet another consideration involves considering the overall cost and benefits of (a) doing upgrades to an older computer versus (b) getting a new computer, and for the Mac Pro here in the sound isolation studio, it is possible to spend nearly as much doing performance upgrades as it is to get a new Mac Pro . . .
I would like to have a new 12-core Mac Pro, but the smart way to get one is to wait until Apple releases a new Mac Pro model, at which time the previous models usually are on sale at a good discount at Amazon.com, although typically no more than perhaps 8 percent (versus the usual 3 percent discount), which is not such a big discount since Amazon.com now charges sales tax in a lot of locations . . .
THOUGHTSCompared to your 2007 iMac, the Mac Pro here in the sound isolation studio is significantly more powerful, but it is five or six years-old, which is important to consider when making sense of all this information, although the Mac Pro here in the sound isolation studio runs everything I use with no problems, and it is very peppy . . .
The bus bandwidth and so forth is significant relative to the time when the Mac Pro here in the sound isolation was current, but I am not convinced that this is the case now when one is comparing the new 27" iMac with the Intel i7 processor to a new Mac Pro, since the current Mac Pro is a few years old and has not been upgraded in perhaps two or three years, although Apple has indicated that it is going to do a Mac Pro refresh this year . . .
The 27" iMac with the i7 processor is a factory upgrade, as is having one of the new hybrid SSD+internal hard drives installed, but you can save money by doing the memory upgrade yourself using memory from Other World Computing . . .
Especially with the new hybrid drive, the 27" iMac with the fastest i7 processor is a screamer, and there are ways to enhance it laster, although it mostly is a matter of using external SSD drives via the Thunderbolt interface, as I recall . . .
Yet another possibility is to consider getting a used Mac Pro from PowerMax, which includes a 90-day warranty, which is a sufficient amount of time to ensure that the used Mac Pro does not have problems, where for example you can get a 3.0-GHz 8-core Mac Pro similar to the one here in the sound isolation studio for approximately $1,300 to $1,500 (US) and then can upgrade the memory, since most of them do not have a lot of memory,where the drawback is that it can cost $500 (US) to upgrade the memory to 24GB or there about, if you know which type of memory to get at the lowest prices, where if you upgrade the video card for another $275 (US), this costs pretty much the same as a new quad-core Mac Pro, so it depends on a lot of factors, and at present I do not have enough information to do a comparison with an upgraded and enhance 2008-2009 8-core Mac Pro and the current quad-core Mac Pro, although it is obvious from Activity Monitor (
see above) that the software I use is fully capable of utilizing all 8 cores, which is important and includes the operating system, of course . . .
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NOTE: I recommend PowerMax, because I have purchased Mac stuff from them, including the display I use here in the sound isolation studio, and they are trustworthy and reliable, plus they know a lot about Apple computers, which is the case with Other World Computing, as well . . . ]
PowerMaxThe new 27" iMac with the i7 processor and hybrid drive (a.k.a., "Fusion") is a very fast machine, and as best as I can determine it is faster than the Mac Pro here in the sound isolation studio, but another important reality is that the Mac Pro here in the sound isolation studio is able to handle everything with plenty of available resources most of the time, and the only reason I am doing some upgrades is to be able to push the envelope for 64-bit applications, which I did by upgrading the memory to 20GB . . .
Upgrading the video card will make an improvement, but it is more of a curiosity type of thing at present, since with the original factory video card the Mac Pro here in the sound isolation studio continues to be peppy . . .
If your budget for a new Mac is in the range of $2,000 to $2,500 (US), then I think the new 27" iMac with the i7 processor and hybrid SSD+internal hard drive makes the most sense, if getting a pair of "computer glasses" solves the vision dilemma, and you get one year of AppleCare, which is useful, noting that you can extend the AppleCare anytime during the first 12 months, and you can save some money by upgrading the memory with memory from Other World Computing, which is fabulous . . .
Fabulous! 