i5-3570K 4Core 4Thread 6MB L3, 3.4GHz $230
http://www.newegg.com/Product/Product.aspx?Item=N82E16819116504
i7-3770K 4Core 8Thread 8MB L3, 3.5GHz $320
http://www.newegg.com/Product/Product.aspx?Item=N82E16819116501
The difference there, is one has Hyperthreading turned on,
the other has it turned off. Price diff is $90.
http://www.cpubenchmark.net/high_end_cpus.html
Intel Core i5-3570K @ 3.40GHz 7,128
Intel Core i7-3770K @ 3.50GHz 9,641
Double the execution threads, gives 1.35x in that benchmark. In
the first generation when Hyperthreading came out, it was good
for about 1.05x on average.
*******
There are a ton of LGA1155 motherboards out there. Just get one
with the peripheral chips on it you really want. (Gigabit NIC
for sure, USB3 is good to have for the future, ESATA if you
had a lot of ESATA external drives, Firewire if you had some
kind of camcorder and needed video transfers, and so on.) There
are some features that only seem to be of interest to the
manufacturer, as they never seem to come up in conversation.
http://www.newegg.com/Product/Product.aspx?Item=N82E16813157293
*******
Q3 Arena shouldn't need much of a graphics card. Some of the Intel
processors have built-in graphics. You can use
ark.intel.com
to check for that.
http://ark.intel.com/products/65520/Intel-Core-i5-3570K-Processor-6M-Cache-up-to-3_80-GHz
"HD4000 graphics".
If the motherboard has the graphics connectors on the back,
and you're not ready to purchase a video card yet, you
can test and bring up the system using the processor
built-in graphics.
*******
The OS choice, depends on your taste in memory. If you're the
kind of person who buys a 4x4GB kit for your new computer,
then a 64 bit OS will make best usage of the 16GB total memory.
If you buy a 2x2GB kit of memory, then a 32 bit OS will be
a good fit for that.
W7 x64 does not support 16-bit stuff, like some older installers.
Whereas, the x32 version, does support x16 installers and more of
your older programs.
I haven't looked lately, but in the past Microsoft had compatibility checkers
or web pages with lists of known-to-work products. You could try that
route. It'll be a bit harder to find some of that stuff, because
Microsoft generally pitches everything when they move to their new OS.
Sometimes, I have to use
www.archive.org to find older reference
material.
Some Adobe products now, are 64 bit only. If you have gazillions of dollars
to spend on things like Photoshop or the Adobe movie editor, then you
should give more serious consideration to the 64 bit OS.
A 4GB address space used on the 32 bit OS, will be a bit restrictive for
gaming. Especially if you buy a video card which has a lot of
onboard memory. This might be an issue for something like Microsoft
Flight Simulator, or some other program which is resource intensive
just so it can be resource intensive.
But if Q3 Arena was your only objective, then the 32 bit OS should
handle it.
I have W7 x64 on my laptop, and so far that hasn't provided me
any additional functionality. So in terms of "happy surprises", I
can't say it's done anything for me. But, I don't use older
programs with 16 bit installers on there, and I also don't
have a gazillion dollars for Adobe products. So I hardly qualify
as a "discerning user" :-) YMMV.
Paul