OK, so my 2nd SSD came in last night, and I moved the main system over.
Specs:
Mobo: ASRock extreme3gen3
CPU: 2600 (non-K) @ 4.3GHz (turbo and BLCK overclock)
RAM: 16GB 1333
GPU: GTX570
System Drive: Agiligy3 240GB x2 in RAID0
Project Drive: 1TB Seagate 7200rpm x2 in RAID1
Document Drive: 500GB Seagate
CD/DVD drive: Lite-ON BluRau plaer and DVD Burner
Important software: Win8 64bit, Office suite, Adobe Creative Suite CS1 and Premere Pro CS5.5, various games
As to be expected, everything runs pretty fluidly on the system as it has plenty of horsepower, so I will mostly be mentioning differences between this system and the others.
Ram use: idle it uses a whopping 2.5GB! talk about pre-loading software and having things sit in the background! On top of that task manager now shows the stuff that is cached in ram (win7 you had to go into resource monitor). Win7 only ever preloaded ~4-5GB of files, while win8 preloads some 8GB of information in the background. I have the Ram, so it may as well get used, but this is some very agressive ram usage, I am amazed that it can manage so much stuff in the background while still feeling so responsive.
Audio: I am using the xFi MB2 suite on top of the onboard audio chipset, and outputting via optical to a pretty nice amp (not as powerful as I would like, but very clean output). Everything works fine, and no major changes over win7. I feel like there is a little more clarity, but I think it is just in my head and I have no tools to really test this. My one annoyance is that every time I installed or updated an audio driver win8 always wants to default to the HDMI output to my monitor's craptastic speakers, it is not a huge issue to change it back, and I know that win7 defaulted to this as well during the initial install, but win7 at least remembered my preference and I only had to change it back once where win8 I ahve to change it back with every driver change. Again, not a huge issue, just a minor setup annoyance
USB3: USB3 worked out of the box with win8. Sadly my USB3 flash drive is out for RMA so I was not able to bench the interface before installing the mobo driver, but it seemed to work fine with my USB2 devices
Drivers: In fact, win8 picked up all my hardware right away, but there was an obvious performance difference between the default driver and the manufacture drivers for just about everything.
Loading and responsiveness: Sadly the time to load the RAID controller during POST negates any possible load time gains by the RAID0 as I was already getting a 10sec boot time before (after POST), and now I am getting 6-7sec boot time (after a 4sec longer POST) so the total load time is a wash if not slightly slower now. Before I was getting 160MB/s (uncompressed) and ~280MB/s (compressed) on a single drive. With RAID0 I am averaging ~250MB/s uncompressed and ~375MB/s compressed with the occasional dip down to 120MB/s and jump up to 550MB/s. Program loads were already near-instant pre-RAID0, so there is not a whole lot of practical difference there either. However, there are 2 areas where there is a huge difference:
1) In Skyrim and other games the loads are nearly instant (just time to put up the splash screen and then take it away), easily less than 1/2 the time from before RAID0, and with 480GB of space I have room to install all my programs and games with room to spare. Other large programs like Premiere load a little quicker, but as they have some initialization time that is not tied to the HDD performance it is not quite 1/2 the load time.
2) With the extra space I have enough room to use the SSD for holding video editing source material, which means that now when editing my HDDs idle (making my rig very nearly silent), and the short seek time lets me edit many more streams at once without the system so much as blinking (from the RAID1 HDDs it would hickup if I had too many streams, or switched through too many sources too quickly). It also means that my CPU gets pushed to 100% much easier, where before it mostly sat at ~60-80% utilization when editing because the HDDs simply could not read quickly enough.
Sadly this has little to with with win8, and much more to do with SSDs in raid0, which I think would be useless for most users, but for media work I have to say it is pretty awesome and unlocks a lot of potential.
Graphics: I love the new Metro interface, but there is one very annoying thing I have found with it; In the games app there is an avatar of my xBox character, and when it moves there is some extremely obvious frame studdering or dropping issues going on, almost like a ghosting behavior. Obviously this is an issue with their programming as I am not noticing any such issues in anything else, hopefully this is fixed down the line and not a limitation of the languages used in the metro design. Otherwise, everything runs just fine on my netbook, so on a real rig it all runs flawlessly.
Well, that is my first imrpession. No issues using keys and mouse on the rig like there were back with CP and RP versions, but I think it would be better with a touch-screen or leap motion interface. I get a little annoyed that the lack of drop-down menues when right-clicking things in metro and having to move all the way down to the pop-up menu at the bottom of the screen, but after the initial setup I am finding that I do not need to use it often so I don't see this being a long-term issue.
I am going to steal one of my 27" monitors from work for a few days to see how multi-monitor support is (I hear there are some great new features on that end). I am also going to poke arround the domain and business oriented features and see if anything has improved or changed from win7, and I will post back if I find anythng interesting on those ends.
In the end I am definitely going to upgrade. I have grown accustomed to the new UI and feel oddly limited going back to win7. Plus I want to upgrade from 16GB of 1333 to 32GB of 1600+ which was simply not fiscally sensible when I built the machine, but now something I am very interested in doing as I do more video work (and it is much more affordable to do now). Home edition caps out at 16GB of Ram, so I would have to pay $65 for anytime upgrade, or $40 for the win8 upgrade so that makes the decision very easy for me. On top of that I want to play more with pro-style networking which is not easily done with home edition.