Help on choosing PSU.

[dmxdex2020]

Product Name Qty Price Line Total
Intel Core i7 920 D0 Stepping (SLBEJ) 2.66Ghz (Nehalem) (Socket LGA1366) - Retail + World In Conflict PC Game Intel Core i7 920 D0 Stepping (SLBEJ) 2.66Ghz (Nehalem) (Socket LGA1366) - Retail + World In Conflict PC Game £208.99
(£181.73) £208.99
(£181.73)
Gigabyte GA-EX58-UD3R Intel X58 (Socket 1366) PCI-Express DDR3 Motherboard Gigabyte GA-EX58-UD3R Intel X58 (Socket 1366) PCI-Express DDR3 Motherboard £143.99
(£125.21) £143.99
(£125.21)
Antec 1200 Twelve Hundred Ultimate Gaming Case - Black (No PSU) Antec 1200 Twelve Hundred Ultimate Gaming Case - Black (No PSU) £137.99
(£119.99) £137.99
(£119.99)
OcUK Value ATI Radeon HD 4890 1024MB GDDR5 PCI-Express Graphics Card - Retail OcUK Value ATI Radeon HD 4890 1024MB GDDR5 PCI-Express Graphics Card - Retail £135.99
(£118.25) £271.98
(£236.50)
Patriot Viper 6GB (3x2GB) DDR3 PC3-12800 (1600MHz) Low Latency Tri-Channel (PVT36G1600LLK) Patriot Viper 6GB (3x2GB) DDR3 PC3-12800 (1600MHz) Low Latency Tri-Channel (PVT36G1600LLK) £75.99
(£66.08) £75.99
(£66.08)
Western Digital Caviar Black 500GB SATA-II 32MB Cache - OEM (WD5001AALS) Western Digital Caviar Black 500GB SATA-II 32MB Cache - OEM (WD5001AALS) £44.99
(£39.12) £89.98
(£78.24)
Titan TTC-NK85TZ Fenrir CPU Cooler (Socket 754/939/940/AM2/LGA775/LGA1366) Titan TTC-NK85TZ Fenrir CPU Cooler (Socket 754/939/940/AM2/LGA775/LGA1366) £33.34
(£28.99) £33.34
(£28.99)
Sony Optiarc AD-7240S 24x DVD±RW SATA Dual Layer ReWriter (Black) - OEM Sony Optiarc AD-7240S 24x DVD±RW SATA Dual Layer ReWriter (Black) - OEM £18.99
(£16.51) £18.99
(£16.51)
Sub Total : £853.25
Shipping cost assumes delivery to UK Mainland with:
DPD Next Day Parcel
(This can be changed during checkout) Shipping : £12.50
VAT is being charged at 15% VAT : £129.86
Total : £995.61

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I am just not sure which PSU you buy for my system?

 

[dmxdex2020]

If i am using sli or crossfire would that psu be enough even for next gen cards? Also what is difference between the corsair HX and TX? below is a 850w corsair TX which is alittle cheaper.

 

[dmxdex2020]

The HX series are moduler
Also the HX 750s and 850s are a newer design and are much better then the pervious generation.

What does modular mean? lol not to sure im a noob with psu's. Will the 750 power the rig i posted without problems? i have 2 4890's in the list, and will no doubt use sli or crossfire in the future

 

[dmxdex2020]

So for spec i have listed a corsair hx 750 will be fine? even if i crossfire it up and maybe sli, and possibly quad crossfire and quad sli.