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Could a Seasonic 300W TFX PSU run Powercolor's low-profile 5750?

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January 22, 2011 9:57:05 PM

The title basically sums up what I want to know. I looked up how many Amps the PSU can support on the 12v rail and the PSU had two rails each carrying 18A. I don't know how many amps the Powercolor Radeon 5750 would require but I think it might work. Any other opinions?
a c 1109 ) Power supply
January 22, 2011 10:09:05 PM

The ATI Radeon HD 5750 at stock clocks will draw a maximum of 7.2 Amps from the +12 Volt rail.

You will need at least one 75W 6-pin PCI Express power connector on the power supply unit.

That power supply should be able to handle it.
January 22, 2011 10:12:11 PM

I'm pretty sure a Molex-6-pin would work just fine, are you sure it's only 7.2 Amps? The competitor Palit Geforce 450 requires 22 Amps on the 12V rail.
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a c 243 ) Power supply
January 22, 2011 10:14:30 PM

12v combined is 21 amps, 5750 uses about 4 on average, shouldn't be a problem, whats the rest of the system ?
a c 1109 ) Power supply
January 22, 2011 10:16:39 PM

mister g said:
I'm pretty sure a Molex-6-pin would work just fine, are you sure it's only 7.2 Amps? The competitor Palit Geforce 450 requires 22 Amps on the 12V rail.

I'm quite sure. I got the specifications from AMD.
January 22, 2011 10:21:09 PM

The system is an Inspiron 530s, not that interested in upgrading right now just wanted to know my options. Why would Palit require 22A on the 12V rail on its low profile Geforce 450, does it really use that much power?
a c 1109 ) Power supply
January 22, 2011 10:28:37 PM

mister g said:
The system is an Inspiron 530s, not that interested in upgrading right now just wanted to know my options. Why would Palit require 22A on the 12V rail on its low profile Geforce 450, does it really use that much power?

According to NVIDIA the GeForce GTS 450 running at stock clock speeds will draw a maximum of 8.83 Amps from the +12 Volt rail(s). It only has one 6-pin PCI Express Supplementary Power Connector so there's no way that it draws anywhere near 22 Amps.
January 22, 2011 10:30:34 PM

So in theory the Seasonic can support either a 450 or 5750? Also is the Inspiron 546st essentially the same as the 530s except eith color options?

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a c 1109 ) Power supply
January 22, 2011 11:32:34 PM
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mister g said:
So in theory the Seasonic can support either a 450 or 5750? Also is the Inspiron 546st essentially the same as the 530s except eith color options?

In theory yes.

The Dell Inspiron 530s uses a slimline case so that limits your video card choices to Low Profile ones only.
January 23, 2011 10:23:39 AM

Best answer selected by mister g.
a b ) Power supply
January 23, 2011 10:33:02 AM

mister g said:
The title basically sums up what I want to know. I looked up how many Amps the PSU can support on the 12v rail and the PSU had two rails each carrying 18A. I don't know how many amps the Powercolor Radeon 5750 would require but I think it might work. Any other opinions?


What is the maximum output on the combined 12v rails. The 18A is considered peak amps not constant amps. Since each can peak at 18a, theoretically that means the 12v rails can provide up to 432w of peak power. However, both rails cannot peak at the same time so actual peak power will be lower. Peak power means for a split second or two.

The safest bet is to install a HD 5670 512MB since it uses very little power (under 30w).



Source: http://www.xbitlabs.com/articles/video/display/axle-rad...


The HD 5750 may be doable, but it depends on the rest of your system. I do not recommend the GTS 450 since it uses too much power for a 300w PSU. Seasonic manufactures high quality PSUs, but push it too hard and it will fail. A failed PSU can potentially damage every single component in your system; very rare, but it does happen. More common is maybe one or two components will be damaged.



Source: http://www.xbitlabs.com/articles/video/display/nvidia-g...
January 23, 2011 10:41:06 AM

Inspiron 530s running with
Intel Core 2 Duo E4300 (maybe E8600 in the future)
4GB of DDR2 RAM (PC2-6400)
Radeon 2400 XT low-profile card
Dell G33 mobo
48x DVD/CD combo drive (can't write DVDs
Original Seagate 160GB HDD
!