Solved Help choose one of these two Corsair PSUs Tags: Power Supplies Components Last response: October 23, 2009 9:03 PM in Components Share xbonez October 23, 2009 7:10:09 PM Here are my system specs: Processor: Intel Core i7 920 2.66GHz Motherboard: EVGA 132-BL-E758-A1 X58 3-Way SLI Core i7 Motherboard RAM: Corsair XMS3 3x2GB Tri Channel 1600Mhz Graphics: HD 5850 Crossfire (if availability improves) or GTX 275 SLI HDD: 2 x 640GB WD Caviar Black (RAID 0) Chassis: Antec 1200 (comes with a whole bunch of fans) Apart from this, I have the usual peripherals: Blu ray drive, sidewinder X6 gaming keyboard, mouse, 1Tb external HDD etc etc. My PSU choices: http://www.amazon.com/Corsair-CMPSU-750TX-750-Watt-Cert... AND http://www.amazon.com/Corsair-CMPSU-850TX-850-Watt-Cert... Which one do you suggest? More about : choose corsair psus Best solution JohnnyLucky a c 248 ) Power supply October 23, 2009 8:06:40 PM Here are the official power requirements for the brand new ATI Radeon HD 5850 and HD 5870 video cards. ATI Radeon™ HD5850 System Requirements: PCI Express® based PC is required with one X16 lane graphics slot available on the motherboard 500 Watt or greater power supply with two 75W 6-pin PCI Express® power connectors recommended 600 Watt and four 6-pin connectors for ATI CrossFireX™ technology in dual mode ATI Radeon™ HD5870 System Requirements: PCI Express® based PC is required with one X16 lane graphics slot available on the motherboard 500 Watt or greater power supply with two 75W 6-pin PCI Express® power connectors recommended 600 Watt and four 6-pin connectors for ATI CrossFireX™ technology in • dual mode The power supply recommendations are for an entire pc system. Note - 40 amps for the 12 volt rail(s) and a grand total of four 75 watt, 6 pin PCI-e psu power cables for dual Crossfire. Share xbonez October 23, 2009 8:29:04 PM well, bot the Corsair PSUs seem to fulfill the requirements. Both come with 4 6-pin PCI-E power connectors. I dont' think I'll be needing 850W anytime soon, so I guess I'll go for the 750W PSU. Seems to be enough for now and with a certain amount of future proofing. Thanks JohnnyLucky m 0 l Can't find your answer ? Ask ! Get the answer JohnnyLucky a c 248 ) Power supply October 23, 2009 9:03:50 PM You're welcome! m 0 l Can't find your answer ? Ask ! Publish Related resources SolvedNeed to Choose One of 4 PSUs. Help Me Narrow it Down? Forum SolvedNeed Help Choosing Between Two PSUs! Forum SolvedAre these two PSUs the same? (i can't tell… and one is a lot more £s) Forum SolvedCan u run two PSUS in one motherboard Forum SolvedWhat's the difference between these two corsair PSUs? Forum NEED HELP, will my PSU power one of these two cards, and which card to choose!!! Forum SolvedTwo PSUs Burned Out in One Week Forum SolvedIssues with two new PSUs, old one works fine Forum Using two PSUs for one PC. Forum Help choose between two Corsair brands Forum SolvedUsing the Corsair 450D Mid Tower for my build, for the top should I just add one or two fans as another exhaust? Forum SolvedPlease Help: Deciding between two PSUs: Antec vs SilverStone Forum SolvedHelp choose between these PSUs Forum Using two PSUs in one PC- Is that possible? Forum Two PSUS? Is one enough? Forum SolvedTwo different Mini ITX builds. Which one should I choose? Forum SolvedOne fan vs. two fans with the Corsair H80i cpu liquid cooler Forum Solvedcan i mix two 2GB 1600 corsair with one 4GB 1600 Forum SolvedNeed help choosing between these 2 PSUs (other suggestions welcome) Forum SolvedPlease help me to choose between these two options Forum More resources Read discussions in other Components categories Power supplies Sound cards NICs Akasa Antec Cooler Master Cougar DeepCool Enermax !