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RAW files on the D800 run about 50 meg or so. RAW files on a D7100 are probably, what? 15-17 meg? You're transferring across a pipe so if it's 3x the data, then it's about 3x the time.
That guy that went off about how you don't need new CPU and stuff... yeah... well... I upgraded my entire machine because the one I had before was being crushed by the D800 raw files. The SSD and the new WD Black spinning disk I got are most definitely the biggest contributor to performance improvements in my setup, but there is no question that the CPU upgrade and RAM speed improvement were also a big help. (which also required a faster motherboard...)
Can you work the images on the Corei5? Sure. It'll work fine. You'll just wait a bit between images. Not a HUGE deal unless you're going through hundreds of them, and I can tell you... even on the system I'm running now, going through hundreds of D800 raw images can be pretty annoying.
I'm really trying to mitigate the misinformation that the original poster is being provided with here regarding computer hardware... Remember, he is using an i5-3450, not an "i5" (it's not one overarching category).
"i5" is a line of processors by Intel. They tend to be built similarly to their i7 counterparts generation-to-generation, save for not having built-in hyperthreading. There's a bit more to it than that. But the best camera analogy based on you referring to all i5's as i5's is like putting a D80 and a D7100 on the same level because they're both crop sensor cameras. If you refer to benchmarks for the i5-3450 (specifically pertaining to relevant tasks, giving second measurements instead of referring to point-based benchmarks on non-related software), it handles processing in photoshop and lightroom at speeds that are at par with any other equivalent i7 processors. He'd have to spend an arm and a leg to get any worth-while performance increase by upgrading his computer. Essentially, what he has now is a practically brand-new computer with a good, current $200 processor.
Increasing RAM speed also won't make a significant difference. Whether he's running on 1600MHz RAM or 1333MHz RAM, it won't matter. There's actually a bigger difference in the configuration of your RAM (the RAM timings). That gets technical, and again it doesn't really matter all that much. He has 16GB of RAM, and that's more than sufficient and all that really matters in this case. He doesn't even need 16GB of RAM, although it's definitely useful (I run on 8GB and I don't like rebooting my computer all too often, so it gets bogged down & 16GB can be useful with all the applications I run at once).
I occasionally do some part-time professional work contracting out to build computers. I just really don't want people giving out misinformation. Don't refer to every i5 as "an i5". That's incorrect and absolutely misleading.
Oh so you occasionally do some part-time professional computer work, do you?
Well, I'm a FULL TIME IT consultant. I have been in the industry for about 20 years, and have used computers since I was 9. I serve as CIO for two companies, and also serve as architect and senior IT consultant for those two, and a couple more. I have been personally responsible for organizations consisting dozens of IT professionals, managing thousands of servers, tens of thousands of desktops, and several petabytes of enterprise-grade storage. I am also a software developer and can program in more languages than I can usefully articulate without sitting here for an hour trying to remember them all.
I'm pretty sure I know that the Corei5 is, and what the differences in processors are.
I'm gonna' go out on a limb and say that I'm pretty sure I know what I'm talking about, so please be aware of who you're addressing before you try to put someone in their place.
I stand by what I said previously... which, btw, was NOT that his i5 wouldn't do the job. In fact, I pretty pointedly stated that the SSD and very fast disk were the biggest contributors to the performance boost. Obviously, you need to make your purchases wisely. There are current generation Xeon procs that do not compete will against some of the current generation Corei5s.
Oh, and just for fun... there is a motherboard from Intel named after my Dad, who happens to have spent many years as a senior VP at Intel, most recently responsible for the motherboards division.
Thank you, and good night.
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