PSU FSP SAGA 450 good for AMD radeon 270x ?

Ardit-OC · Aug 31, 2014

Hello, i was wondering could i run a Sapphire radeon 270x on the psu saga 450 ?
Or i have to buy a new psu ?
Link: http://www.newegg.com/Product/Product.aspx?Item=N82E16817104954
Thanks.

clutchc · Aug 31, 2014

I wouldn't no. If this is your PSU, it only has a 13a and 14a +12V rails rated for 324W, and only has one 6 pin PCIe power connector for a card that needs 2.
http://www.newegg.com/Product/Product.aspx?Item=N82E16817104954

Ardit-OC · Sep 1, 2014

Thank you!
I just posted to make sure i was not wasting money on the psu, but looks like it is needed
Probably a Corsair 500w 80+ will do the job.

Ardit-OC · Sep 1, 2014

What about this one ? It has 18A on 12+
http://tinypic.com/view.php?pic=333ux6v&s=6#.VARiG8NPexo

CPU: i5 3450

GPU: Shapphire R9 270X

Ram: 8 GB

HDD: 2
No DVD

Ardit-OC · Sep 1, 2014

Radeon R9 270x needs only 24A
FSP Group SAGA+ 450R 450W has: +12V1@14A, +12V2@13A
Can i combin 2 +12 together in 1 ? That would be +12 27A ?!
Using somthing like this: http://www.amazon.com/StarTech-com-PCIEXSPLIT6-6-Inch-Express-Splitter/dp/B004NNTVT6

jimthenagual · Sep 1, 2014

No, you can't just add them together to see how many amps you have. You have to know how many watts it puts out on the +12v line(s) in total which for the FSP Group SAGA+ 450R is 324W, then divide it by 12v to get 27Amps. In this case, adding the two 12v line's amps up works out to be the same, but that's not always the case.

clutchc · Sep 1, 2014

Ardit-OC :

I would consider that one marginal for the R9-270X. Does it even have 2 x 6 pin PCIe power connectors?

The R9-270X is a 180W card: http://www.hwcompare.com/15657/radeon-r9-270x/
At +12V, that will draw 15A when it reaches its TDP. Where did you come up with 24A?

Ardit-OC · Sep 1, 2014

24A when V1 and V2 are combined in 1!

What about this one ?
Its again FSP saga but 500watt and gives 18A on +12V1 and 18A on +12V2
http://tinypic.com/view.php?pic=333ux6v&s=6#.VATK6sNPexo

clutchc · Sep 1, 2014

Ardit-OC :

Again... does it have 2 x 6 pin connectors for the card?
That "500W" PSU has the same +12V ratings as my little Seasonic 300W! So it is not anything I'd consider for a R9-270X. You need a +12V rail that is at least 40+ amps and 480W to be able to run the card and the rest of your system w/o problems.

Ardit-OC · Sep 2, 2014

Here are the full specs of FSP Saga II 500 500W

Features
Compliant for Intel Core 2 & AMD Athlon 64 series
ATX 12V V2.3 Ready
High Efficiency > 80%
Supports PCI-Express Connector
Energy Saving Standby Power Mode < 1W
120mm Variable Speed Fan with Ultra Low Noise
Eco-Friendly PSU with Active PFC
Thermal Coated Protection of White Casing
230V Input with Complete Protection (OVP / OCP / SCP)
Specifications
Efficiency: 80%
Input Voltage: 200 - 240 VAC
Frequency: 50Hz - 60Hz
PFC: Active
Power Provided: 500W
Over-Current Protection: Yes
Over-Voltage Protection: Yes
Short-Circuit Protection: Yes
Case Colour: White
Chassis Fan: 120 mm
Noise: < 21 dBA
Form Factor: ATX 12V V2.3
Safety Approval: CE, CB, Nemko, TUV
Dimensions: 140 x 150 x 86 mm (L x W x H)
Connections
20+4 Pin Main Connector:1
CPU 4-Pin 12V Connector:1
SATA Connector:4
4-Pin Molex Peripheral Connectors:4
6-Pin PCIe Connectors:1
6+2 Pin PCIe Connectors:1
Floppy Drive Connectors:1

clutchc · Sep 2, 2014

Well, it does appear to have the necessary PCIe power connections the card requires. But with that small +12V capacity, I don't think it will be a good PSU for the R9-270X. At 408W on the +12V rail, that is only 34A capacity. Personally, I wouldn't use it.

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