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66 posts

Master Geek

Topic # 229180 11-Feb-2018 13:58
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Hi all

I have been given 2 x 400w power supplies, one Zalman ZM400-le (dual 6 pin) and the other Cooler Master RS-400-PSAR-i3 (single 6 pin).

The brightest answer is to buy a new power supply but funds are limited and I was given most of this hardware and am trying to get the best value for a system for myself and one to sell to save up for future upgrades.

List of how the hardware is configured at the moment.

Keep system
Intel DH55TC motherboard
Maelstrom 120T AIO liquid cooler
14gb DDR3 ram
GTX 960 - single 6 pin
Samsung 840 evo SSD

Sell system
HP OEM - MSI MS-7613 motherboard
Stock cooler
6gb DDR3 ram
GTX 560ti - dual 6 pin
Toshiba MK6475GSX 640GB - laptop hard drive

My thoughts are
-The sell system (against all online advise) is to get 2 x molex to 6 pin adapter.
-Use the Zalman power supply on the sell system as it has the dual 6 pin and use the Cooler Master on the keep system as the power supply only has single 6 pin and the GTX 960 only requires single 6 pin

Use case for the keep system is generally light gaming, currently maybe 2 hours of Starcraft 2 per day but may get into GTA V in the near future. Very limited overclocking as restricted by the board unable to adjust V-Core.

Use case for the sell system, I want to advertise it as a beginners/light gaming PC.

Thanks in advance

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181 posts

Master Geek
+1 received by user: 23

  Reply # 1955495 12-Feb-2018 08:55
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Check out the outervision PSU calculator -


Even under heavy load your I7-870 pulls ~ 346W  max 


The I5, coz the 560TI is not as efficient pulls about 389W max (30A on +12V) .. so its very tight.


The Zalman claims to have 31A on +12V so I would avoid using that with the I5 (these are pretty low end units)


Cooler master looks like 32A on +12V, so again not great news for the I5 but should be OK on the I7 based on your load.




You may have more luck selling off the parts in the I5 system rather than getting it a better PSU and doing it as a complete unit.

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