Which is better? New PC build or old

[Digitaldave18]

Hello and thanks for viewing my post, so first I would like to give you guys some background info. On my current PC I mainly play Arma 2, as you may or may not know Arma is heavily CPU based and is causing my current PC to lag now because I have been partaking in bigger operations or missions with my clan unit. heres my clan http://fridayplay.net/

So the main issue that I need help with would be if its worth it to buy this new hardware and would it improve my gameplay frames.

Current PC (old)
AMD 6-100 3.3 stock OC'd to 3.8
Radeon 6950 ice
16gb kingston hyper X
2 TB 7200 HDD WD
Some crappy coolermaster case

Upgraded build (soon to be upgraded)
Intel Core i5-2500K Sandy Bridge 3.3GHz (Plans to oc to at least 3.7)
ASUS GTX670-DC2-2GD5 GeForce GTX 670 2GB 256-bit
GIGABYTE GA-Z77X-UP4 TH LGA 1155 Intel Z77 HDMI SATA 6Gb/s
New Full tower case AZZA Solano 1000
RAM, HDD, and PSU remain the same.

Also feel free to suggest changes to the upgraded version as long as it cost around 800-900$ usd

Thanks in advance!

 

[ThatMoose]

I would go with the new build, everything is ok but for a z77 based computer I would go with the Gigabyte g1. Sniper 3 is it still fits your price range, and also have you looked in to the 4GB 670s?

 

[ThatMoose]

*if