Hello,
Thank you very much for your e-mail.
Yes that all still holds true. Xeons are business oriented versions of i7 and indeed larger cache is important factor.
If your data can fit into cache it will be processed much faster. On i7 triple channel data access
L1 cache is 5...10 times faster than RAM
L2 cache is 3 times faster than RAM
L3 cache is 2.5 times faster than RAM
Yes two physical CPUs x 8 cores would be slower than one CPU with 16 cores because of
bus arbitration overhead on two cpu systems.
As for RAM it depends how much data you use. If your entire data set is smaller than 8GB then 8GB RAM is OK. If you need to process larger databases you may add more RAM.
Best regards,
Tomasz Janeczko
amibroker.com
Hi Tomasz
Thanks for the reply. The link there is a bit old (2011). Does the information contained therein still hold true? The Xeon chips available these days seems to have a good deal of onchip cache as well as multi threading, but can be more expensive than i7s. Do you have any opinion on these options for Ami? Also, how much RAM? The link there says 8GB. Is something like 32 or 64 overkill?
Thanks everyone else for opinions too. Sean, I like the idea of two cpus, but would two run slower than one? For example, two 8 cores (for total 32 multithreads), versus a single 16 core.
While I appreciate the replies about gaming rigs, I'm not interested in these.
Thanks
CK
Posted by: Tomasz Janeczko <groups@amibroker.com>
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