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System Built - Should I Upgrade Mobo / Proc?

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February 10, 2012 1:36:37 AM

I have the following system specs picked out for a buddy. What I'm wondering is should I wait until the processor comes in stock to get the better Sandy Bridge and motherboard with 2 PCI-e slots @ 16x, in case he wants to Xfire the 7970s a year or so down the road?

-How much better gaming performance will he see from the better processor?
-How much better gaming performance will he get out of the PCI-e slots both running @ 16x on the other mobo if he decides to xfire?
-Also any potential recommendations / suggestions about the build in general?

**He has a 1TB external HDD for storage.


Here are the current system specs:

Case:
COOLER MASTER HAF 932 Advanced RC-932-KKN5-GP Steel ATX Full Tower Computer Case with USB 3.0, Black - http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Vid Card:
XFX FX-797A-TNBC Radeon HD 7970 3GB 384-bit GDDR5 PCI Express 3.0 x16 HDCP Ready CrossFireX Support Video Card - http://www.newegg.com/Product/Product.aspx?Item=N82E168...

RAM:
G.SKILL Ripjaws Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-12800CL9D-8GBRL - http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Mobo:
ASUS Maximus IV Gene-Z/GEN3 LGA 1155 Intel Z68 HDMI SATA 6Gb/s USB 3.0 Micro ATX Intel Motherboard - http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Processor:
Intel Core i7-2600K Sandy Bridge 3.4GHz (3.8GHz Turbo Boost) LGA 1155 95W Quad-Core Desktop Processor Intel HD Graphics 3000 - http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Power Supply:
CORSAIR Professional Series HX1050 1050W ATX12V / EPS12V SLI Ready CrossFire Ready 80 PLUS SILVER Certified Modular Power ... - http://www.newegg.com/Product/Product.aspx?Item=N82E168...

SSD:
Intel 520 Series Cherryville SSDSC2CW120A3K5 2.5" 120GB SATA III MLC Internal Solid State Drive (SSD) - http://www.newegg.com/Product/Product.aspx?Item=N82E168...


And here are the 2 potential replacement candidates:

Processor:
Intel Core i7-3930K Sandy Bridge-E 3.2GHz (3.8GHz Turbo) LGA 2011 130W Six-Core Desktop Processor - http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Mobo:
ASUS Sabertooth X79 LGA 2011 Intel X79 SATA 6Gb/s USB 3.0 ATX Intel Motherboard - http://www.newegg.com/Product/Product.aspx?Item=N82E168...
a b B Homebuilt system
February 10, 2012 2:17:56 AM

the difference between the 2600K and the 3930K in actual performance is not worth the huge pricetag difference.
February 10, 2012 2:23:48 AM

That was my initial impression as well, thanks for the feedback!

Any opinions on the PCIe speeds in regard to possible xfire configuration later? The setup will only be running on a monitor at 1080p resolution.
a b B Homebuilt system
February 10, 2012 2:32:19 AM

on a single 1080p monitor, crossfire of HD 7970s is overkill in the extreme. everything you throw at a single card will exceed 60 FPS

the gen 3 in your existing board means it'll handle the crossfire at pretty much full speed.

Previous testing shows, at least under PCIe 2.1, the difference between 16x/16x and 8x/8x in Crossfire or SLI is about 2%.

This means if 16/16 gets 100 FPS, 8/8 gets 98 fps. it's not really noticeable.

that said, by the time you'd want to crossfire a 7970 for any actual practical reason, iit'll be smarter to build a whole PC instead.

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