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

Forum CPU & Components : Power Supplies, Cases & Mods [Solved] Could a Seasonic 300W TFX PSU run Powercolor's low-profile 5750?

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?

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Reply to mister g

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.

Reply to ko888

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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Reply to mister g

12v combined is 21 amps, 5750 uses about 4 on average, shouldn't be a problem, whats the rest of the system ?

Reply to delluser1

mister g wrote :

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.

Reply to ko888

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?

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Reply to mister g

mister g wrote :

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.

Reply to ko888

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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Reply to mister g

Best answer

mister g wrote :

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.

Reply to ko888

Like these two : http://www.newegg.com/Product/Prod [...] -_-Product http://www.newegg.com/Product/Prod [...] -_-Product

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Reply to mister g

mister g wrote :

Like these two : http://www.newegg.com/Product/Prod [...] -_-Product http://www.newegg.com/Product/Prod [...] -_-Product

Yes.

Just make sure it comes with a low profile bracket and a 4-pin Molex to 6-pin PCI-E supplementary power cable.

Reply to ko888

Best answer selected by mister g.

Reply to mister g

mister g wrote :

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/v [...] html#sect0

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/v [...] html#sect0

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

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