New CFG for 1500eur, advice

Hello everybody,
I would like to buy a new pc, my budget is 1500eur for the pc case only, a have different budget for the monitor.
I would like to use it to play the latest games on ultra high and for about a year or 2 in the future also, but i also happen to work with some calculating and coding programms like matlab , and coding in C++, while editing under Latex, listening to music , but no havy video editing or what so ever.
How i dont want to neglect the CPU power and i would like to be able to perform some heavy multitasking and not just gaming

I came up with 2 configs that i post below.
i already have keyboard , mouse and OS, the monitor that i would be gettinf is an 24'' (some maybe some advices here 2) my budget for the monitor is around 400 eur

here are the configs

CPU
Intel Core i7 930 (2.8 GHz) 283eur
Or
Intel Core i7 875K (2.93 GHz) 356eur

Mother board
MSI X58 Pro-E 153eur
Or
ASUS P6X58D-E (Intel X58 Express) 215eur


Graphics card

Sapphire Radeon™ HD 5870 1Go, DirectX® 11, ATI Eyefinity 390eur

RAM
Corsair 3 x 2 Go DDR3 PC12800 CAS 9 (Xms3) 215eur

Hard disk
Samsung SpinPoint F3 - HD502HJ - 500 Go 7200 RPM 16 Mo Serial ATA II (bulk) 42eur

CPU Cooler
Zalman CNPS9900A LED 55eur

Alim
Enermax Liberty ELT720AWT-ECOII - Alimentation ATX 720W ATX12V Ver 2.3 (1 ventilateur 120mm) - 80PLUS 150eur

PC CASE 100eur


I would also like to know what is the difference between i7 930 and i7 875K?

Would it be better to take i7930 and MSI X58 Pro-E motherboard which are cheaper then the i7 875K and ASUS P6X58D-E (Intel X58 Express) and to invest in a Radeon 5970 which is at 580 eur?


second config

CPU+motherboard
AMD Phenom II X6 1090T (3.2 GHz) - 6-Core et carte mère ASUS M4A89GTD PRO/USB3 (AMD 890GX) 420eur

Graphics card
Sapphire Radeon™ HD 5870 1Go, DirectX® 11, ATI Eyefinity 390eur

or
Sapphire Radeon HD 5970 - 2 Go Dual DVI/Mini DisplayPort - PCI Express (ATI Radeon HD 5970) 580eur

RAM
Corsair 3 x 2 Go DDR3 PC12800 CAS 9 (Xms3) 215eur

Hard disk
Samsung SpinPoint F3 - HD502HJ - 500 Go 7200 RPM 16 Mo Serial ATA II (bulk) 42eur

CPU Cooler
Zalman CNPS9900A LED 55eur

Alim
Enermax Liberty ELT720AWT-ECOII - Alimentation ATX 720W ATX12V Ver 2.3 (1 ventilateur 120mm) - 80PLUS 150eur

PC CASE 100eur

I thant every one who will take the trouble of reading my post

Ps: sorry for my not so awesome english ;)
 
Both systems look very formidable to me, however, if you want to go Intel route, and want to OC like hell, I think i7 875K is a better choice, although you need an LGA1155 (P55 chipset) board for that processor not X58 (LGA 1366) board. Therefore, you may consider ASRock P55 Pro for that build. That will also result in reduction of your cost estimate given above.

In addition to that, if you are not planning to play games at very high resolution (e.g. 2560x1600) as such, you'll be pretty much alright with either nVidia 460 GTX (1GB) or ATI Radeon HD 5850, which also reduce your cost further. However, if you want to have an higher end card i'd stick with ATI Radeon 5870. Having said that, we'll be in much better position to give suggestions if you give us what is your target resolution.

I think you forgot to add casing/and its cost for the above systems. I suggest you to have a look at Cooler Master HAF 922. For roughly 140$ (which is only 50$ more than HAF 922), you can get the newer HAF 932 casing. Regards
 
I'll probably stick with 1920 x 1080, and i dont want having any trouble if i would like to go whqtbeyond that so ill stick with HD 5870,
Sorry for my poor knowledge but what does OC means :p

About the sockets, is LGA1155 an older version? and all of the i7 920, 930 and above are runing on LGA 1366? because i would also try to keep update solutions for the years to come, would be sad if in 2 years if i go with a higher i7, i would have to change the mother board too.

Ps : yes about the casing, i didnt forget about it , it is the last line of my configs : i got about 100 eur for the case, thx for your advices btw ;)
 
Well OC = Over Clocking.

Secondly, whether its LGA 1155 or LGA 1366, both of these will be at End of Life (EOL) in a year or so, once Intel's new processor (Sandy Bridge) will arrive, in LGA 1155 and (probably) LGA 2011 sockets. Hence, there is no chance of 'future' proofing what you are building today.

Having said that, whatever system you may choose from these, should last you easily for about 4-5 years of very good performance, provided 2-3 years down the road you replace your graphic card, I did exactly the same but in two areas, i.e. graphic card and processor, and my system was built in the early days of Core 2 Duo launch.
 
I like the look of the Phenom II X6 build a little more. Also, I would look at 2x GTX 460 (SLI) for the GPU. Same cost as the HD 5870 but should give you better performance.
 
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