Need build advice - i7 data cruncher for massive excel sheets

[makesumwake]

APPROXIMATE PURCHASE DATE: 1-2 weeks

BUDGET RANGE: $1000-$1500 AFTER rebates

SYSTEM USAGE FROM MOST TO LEAST IMPORTANT: running huge complex excel sheets

PARTS NOT REQUIRED: GPU, keyboard, mouse, monitor, speakers, OS, case

PREFERRED WEBSITE(S) FOR PARTS: newegg

COUNTRY OF ORIGIN: USA

PARTS PREFERENCES: none

OVERCLOCKING: YES!

SLI OR CROSSFIRE: no

MONITOR RESOLUTION: 1920X1080

ADDITIONAL COMMENTS: these excel sheets are massive, 500MB or more. they include macros and complex formulas. they need a lot of memory access, thus i need very fast memory read/write times. they current run very slow on my OC'd i3 system


CURRENT BUILD PLAN:

CPU: i7 920 D0, OC'd to 4.0ghz +
MOTHERBOARD: ASUS P6X58D-E
MEMORY: 3X2GB, DDR3 1600 / 1800 / 2000 ??
POWER SUPPLY: Corsair 750w

My biggest question is what speed of memory i need. i want to run the blck at 200+, and i want the memory read/write to be as fast as possible

Thanks

 

[gkay09]

^ Some changes -
1. CPU - Get the i7 950 - It has higher multiplier and a sure D0 stepping
http://www.newegg.com/Product/ComboDealDetails.aspx?ItemList=Combo.374114

2. Mobo
Check this out -
ASUS Rampage III Gene - though small in size, but big on features
http://www.newegg.com/Product/Product.aspx?Item=N82E16813131658
http://www.overclock3d.net/reviews/cpu_mainboard/asus_rampage_iii_gene_review/5
http://www.bit-tech.net/hardware/motherboards/2010/07/19/asus-rampage-3-gene-motherboard-review/3
http://www.tweaktown.com/reviews/3416/asus_rampage_iii_gene_x58_express_motherboard/index4.html
http://www.hardocp.com/article/2010/11/03/asus_rampage_iii_gene_microatx_motherboard_review/7

RAM - If you want very high overclocks, then get a faster RAM
http://www.newegg.com/Product/Product.aspx?Item=N82E16820145320

PSU - IMO even the 650TX would suffice
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139005