Looking for a lower price/performance PSU (~80/90€)

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xxxarkexxx

xxxarkexxx

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Aug 29, 2013
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CPU: Intel Core i5-4670K
CPU Cooler: /
Motherboard: Gigabyte G1.Sniper Z87
Memory: Kingston HyperX blu 8GB (2x4GB) 1600MHz - KHX1600C9D3B1K2/8GX
Storage: Seagate Barracuda 1TB SATA3 7200 - ST1000DM003
Video Card: PALIT GeForce GT 640 1024MB DDR3
Case: Raidmax Super Viper (black-orange)


Which on from this offer is the best solution?

Raidmax RX-600AF
Chieftec CTG-650C
Seasonic SS-520GB


?

If there is some better PSU, just recommend me. Thanks in advance!
 
Solution
ko888


You can. That really isn't a solution, it's just a workaround.

If you can avoid the problem altogether then that is what you should do, since you haven't purchased the PSU yet.
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ko888

ko888

Titan
Feb 18, 2009
16,708
41
84,990
For a system using a single GeForce GTX 640 graphics card NVIDIA specifies a minimum of a 350 Watt or greater system power supply that has a maximum combined +12 Volt continuous current rating of 20 Amps or greater.

Total Power Supply Wattage is NOT the crucial factor in power supply selection!!! Sufficient Total Combined Continuous Power/Current Available on the +12V Rail(s) is the most critical factor.

Overclocking of the CPU and/or GPU(s) may require an additional increase to the maximum combined +12 Volt continuous current ratings, recommended above, to meet the increase in power required for the overclock. The additional amount required will depend on the magnitude of the overclock being attempted.

Preferably you should be looking for a PSU that is Intel Haswell compatible. None of the three in your list are.

What country are you in? Is there any preferred vendor sites that you like to deal with?
 
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ko888

ko888

Titan
Feb 18, 2009
16,708
41
84,990
For a system using a single NVIDIA Reference Design GeForce GTX 760 graphics card NVIDIA specifies a minimum of a 500 Watt or greater system power supply that has a maximum combined +12 Volt continuous current rating of 30 Amps or greater and that has at least two 6-pin PCI Express supplementary power connectors. Some of the non-Reference Design GeForce GTX 760 cards have a single 8-pin (e.g. ASUS GTX 760 DirectCU II OC) or two 8-pin (e.g. MSI GTX 760 HAWK) or one 6-pin and one 8-pin (e.g. Gigabyte GTX 760 WindForce OC, EVGA GTX 760 SC w/ACX Cooler, MSI GTX 760 TwinFrozr Gaming) PCI Express supplementary power connectors.

Seasonic M12II Bronze EVO EDITION 520W (SS-520GM² Active PFC F3)
• maximum combined +12 Volt continuous current rating of 40 Amps
• two (6+2)-pin PCI Express supplementary power connectors
• Haswell Compatible: Yes
• 80 PLUS BRONZE Efficiency Certification
• 3 Year Limited Warranty
• Link: http://www.compumsa.eu/article-4843-design-SS_520GM2_F2_Seasonic_M12II_Bronze_Evo_520W.html?id_art=4843

OCZ ZT Series 550W (OCZ-ZT550W-EU)
• OEM: Great Wall
• maximum combined +12 Volt continuous current rating of 45 Amps
• two (6+2)-pin PCI Express supplementary power connectors
• Haswell Compatible: Yes
• 80 PLUS BRONZE Efficiency Certification
• 5 Year Limited Warranty

OCZ Fatal1ty (New) 550W (OCZ-FTY550W-EU)
• OEM: Sirtec
• maximum combined +12 Volt continuous current rating of 41.3 Amps
• two (6+2)-pin PCI Express supplementary power connectors
• Haswell Compatible: Yes
• 80 PLUS BRONZE Efficiency Certification
• 3 Year Limited Warranty
 
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xxxarkexxx

xxxarkexxx

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Aug 29, 2013
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This OCX Fatal1ty 550W one is amazing but I can't buy it because I'm from Serbia.

One question: 1x6+2 connector works the same as 1x8 connector? (2x6+2 = 2x8 aswell)?





 
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ko888

ko888

Titan
Feb 18, 2009
16,708
41
84,990


A (6+2) PCI Express supplementary power connector means that the connector can be used as a 6-pin PCI Express supplementary power connector or an 8-pin PCI Express supplementary power connector.

pcie-connectors.jpg

6-pin only PCI-E connector on the left and a (6+2)-pin PCI-E connector on the right.
 
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xxxarkexxx

xxxarkexxx

Honorable
Aug 29, 2013
37
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10,530
So I can't have MSI GeForce GTX 760 HAWK with Seasonic SS-520GB because it has only 1x 6pin PCI-E, 1x 6+2pin PCI-e (and GPU need 2x 8)? Or there is any solution to pair these things?

How good is LC Power Pro-line LC7600 V2.3 (2x 6+2pin PCI-E)?
 
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ko888

ko888

Titan
Feb 18, 2009
16,708
41
84,990
The Seasonic SS-520GB isn't Haswell compatible because the +12V rail will go out of spec with the very light load on the +12V rail as would happen with Haswell's C6/C7 power states.

LC-POWER Pro-Line Series 550W (LC7600 V2.3 X_Type)
• OEM: Andyson (based on the Andyson F Series 550W AD-580A2-yy)
• maximum combined +12 Volt continuous current rating of 34 Amps
• two (6+2)-pin PCI Express supplementary power connectors
• Haswell Compatible: Yes
• 80 PLUS BRONZE Efficiency Certification
• 3 Year Limited Warranty

Notice that its combined +12V continuous current rating is much weaker than a 520W Seasonic PSU.

Andyson made power supplies are nowhere near as good as Seasonic made power supplies. Andyson manufactures 94% of Raidmax's PSU models and they have a horrible reputation because they have been known to explode and damage components that are attached to them.
 
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ko888

ko888

Titan
Feb 18, 2009
16,708
41
84,990


Your Intel Core i5-4670K CPU is an Intel Haswell micro-architecture processor.

Intel’s new 4th generation Intel Core processor, code-named "Haswell", have the ability to go into a lower power sleep state.

When an Intel Core (i3, i5, i7) Haswell processor is idle, it enters a sleep state that requires less power than when the CPU is active with a minimum current of 0.05 Amps at 95W and 65W. Since the motherboard voltage regulation modules that provide power to the CPU gets their power from the power supply's +12V rail, these sleep states can dramatically reduce the load on the power supply's +12V rail.

According to Intel's presentation at IDF, the new Haswell processors enter a sleep state called C6/C7 that can drop processor power usage as low as 0.05A. Certain legacy PSUs may become unstable at the new minimum load of 0.05 Amps and trigger the PSU’s under/overvoltage protection circuit causing the PSU to shut down. This will require the user to cycle the power on their power supply using the power switch on the back of the unit.

Power supplies that use a +12V design that allows for a minimum of 0A will not have an issue with the new low power sleep states allowing the CPU to enter deep sleep mode and wake without any problems.
 
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ko888

ko888

Titan
Feb 18, 2009
16,708
41
84,990


When the CPU enters its C6 or C7 sleep state the system won't wake up because the motherboard will detect that one or more of the rails on the power supply has gone out of spec.

To recover, you will have to cycle the power on the PSU using the power switch on the back of the PSU.
 
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ko888

ko888

Titan
Feb 18, 2009
16,708
41
84,990


You can. That really isn't a solution, it's just a workaround.

If you can avoid the problem altogether then that is what you should do, since you haven't purchased the PSU yet.
 
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