Tom's Hardware > Forum > CPU & Components > Power Supplies, PC Cases & Case Mods > [Solved] Help choose one of these two Corsair PSUs

[Solved] Help choose one of these two Corsair PSUs

Forum CPU & Components : Power Supplies, PC Cases & Case Mods - [Solved] Help choose one of these two Corsair PSUs

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Best answer from JohnnyLucky.

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xbonez   10-23-2009 at 09:10:09 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-CMPS [...] 276FD91BY3

AND

http://www.amazon.com/Corsair-CMPS [...] 276FD91BY3


Which one do you suggest?

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Best answer from JohnnyLucky
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.
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Silver CPUs badge JohnnyLucky   10-23-2009 at 10:06:40 PM
Best answer

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.


Message edited by JohnnyLucky on 10-23-2009 at 10:07:20 PM
Reply to JohnnyLucky
xbonez   10-23-2009 at 10:29:04 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

Reply to xbonez
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