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Nas Nas Mar 08, 2011, 10:11am EST Reply - Quote - Report Abuse
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It appears my new entry level GPU needs more than the 305watts my Dell e521 can provide. I will be looking into PSU's tomorrow, anything I should take into consideration when picking one up? I assume they are all the same size and it's just a matter of picking one with the right amount of watts?

Is there anything elseI should consider when picking one up like compatibility with the motherboard, cpu, etc..

I have a Dell e521 AMD athlon 64 x2 dual core 3800 2gz 2 gb ram


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G. G. Mar 08, 2011, 10:49am EST Reply - Quote - Report Abuse
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>> Re: PSU questions
I tried to google some images of your Dell system...... and I have to say that you might have an issue getting a new psu for it..... it kinda looks like they are using a propriatry psu.... in otherwords.... the standard ATX format psu over the counter may not work..... but you need to check it out... it is the overall size/shape that matters along with the capacity and cables....



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john albrich Mar 08, 2011, 11:14am EST Reply - Quote - Report Abuse
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>> Re: PSU questions

A few other things to consider.

Check your motherboard power plugs. Make sure whatever PSU you get has the right connectors for the main power and CPU power sockets if needed. Most are backward compatible but you may find some that don't "break" apart (for example if you have a 20-pin mobo and the connector is a 24-pin non-separable connector, or the CPU plug is a non-separable 8-pin plug...that sort of thing).

Also, newer PSUs may have only SATA hard drive power plugs. So, you would likely either have to get plug adapters for the older 4-pin "molex" power sockets on older drives or new hard drives...which likely wouldn't be compatible with your IDE hard drive data sockets without an IDE/SATA adapter...and there might be physical limitations there.

And the PSU is a component on which you definitely don't want to be "cheap". Buy a quality PSU. A 500W PSU that normally sells for less than $50 is likely not a quality PSU and specific brand names can be important here. I think there's a list of recommended PSU brand-names somewhere on HWA. I do know you can find the occasional high-quality 700W PSU (with sale+rebate+promo code) for less than $40 and the occasional 500W PSU (with sale+rebate+promo) for less than $30, but you have to wait for and be lucky enough to "run-across" the special deal offer.

But, as was said earlier, your Dell case may require a proprietary/custom PSU to fit inside the computer case and match the mounting points. Of course, you can also obtain a new case in which to mount everything and thus be able to buy a "standard" PSU. Again, if you can wait for the right timing, you can find a fairly decent large and standard "ATX" case for as little as $20 (with sale+rebate+promo).




Nas Nas Mar 08, 2011, 12:51pm EST Reply - Quote - Report Abuse
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>> Re: PSU questions
This sucks. All this because of that cheap ass pos fan i bought for my 8400gs.

I actually looked at the Dell website to see if they sold PSU's and to check prices for computers and it turns out one PC they had which I was interested in has the same Radeon 5450 and the PC running a 250watt PSU. So maybe the 400watt thing isn't totally necessary after all?

Jon Bailey Mar 08, 2011, 01:13pm EST Reply - Quote - Report Abuse
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>> Re: PSU questions
You could always attempt to micro drill appropreate holds in the chassis if the new PSU doesnt line up, if youre feeling up to it.

http://support.dell.com/support/edocs/systems/dimE521/en/SM_EN/specs.htm

has the documentation regarding your machine (if you dont have it or cant be bothered to look for it) all of the relevant psu connectors are listed there as well as the current dimensions of the case if you decide to get a new one as John suggested above.

"The world is a temple to the self, and these days, there's alot of believers"
Dublin_Gunner Mar 08, 2011, 05:07pm EST Reply - Quote - Report Abuse
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Edited: Mar 08, 2011, 05:10pm EST

 
>> Re: PSU questions
Apparently your HD5450 states it 'requires' a 450W PSU in a system.

I call total and utter BS.

There is no way a low end system, with a HD5450 will draw anywhere near that. Unless you had 20 hard drives, a feww DVD burners constantly burning at high speeds and every component over-volted I'd say your Dell 305W PSU will supply MORE than enough current.

However, if it blows up, don't blame me :D:D

(but seriously, it wont)

http://www.guru3d.com/article/radeon-5450-review/6

Full stress, 177W and thats with Core i7 965 OC'd to 3.75Ghz

Lancool PC K62
Phenom II x3 @ 3.5Ghz
4GB DDR2-800
ASUS GTX570 DirectCU II
john albrich Mar 08, 2011, 06:21pm EST Reply - Quote - Report Abuse
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>> Re: PSU questions
Dublin_Gunner said:
...I call total and utter BS.
There is no way a low end system, with a HD5450 will draw anywhere near that. Unless you had 20 hard drives, a feww DVD burners constantly burning at high speeds and every component over-volted I'd say your Dell 305W PSU will supply MORE than enough current.

However, if it blows up, don't blame me :D:D

(but seriously, it wont)....


I think you used a little too much dynamite there, Butch. I can pretty much guarantee that Dell's 300W PSU will either crowbar or choke on trying to power-up 20 standard HDDs, let alone trying to add in multiple DVD burners, the mobo, the graphics card, etc. of a typical system. But I understand what you're saying. The entry-level HD5450 is relatively speaking (esp the low-memory/fanless versions) a tame power-consuming card.

Dublin_Gunner Mar 08, 2011, 07:25pm EST Reply - Quote - Report Abuse
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Edited: Mar 08, 2011, 07:26pm EST

 
>> Re: PSU questions
john albrich said:
Dublin_Gunner said:
...I call total and utter BS.
There is no way a low end system, with a HD5450 will draw anywhere near that. Unless you had 20 hard drives, a feww DVD burners constantly burning at high speeds and every component over-volted I'd say your Dell 305W PSU will supply MORE than enough current.

However, if it blows up, don't blame me :D:D

(but seriously, it wont)....


I think you used a little too much dynamite there, Butch. I can pretty much guarantee that Dell's 300W PSU will either crowbar or choke on trying to power-up 20 standard HDDs, let alone trying to add in multiple DVD burners, the mobo, the graphics card, etc. of a typical system. But I understand what you're saying. The entry-level HD5450 is relatively speaking (esp the low-memory/fanless versions) a tame power-consuming card.



I was stating you'd want 20 HDD's to nring it up to 400W! Not that the Dell PSU would handle it! (and I didn't calculate it, it was pure exageration).

The point I was making was, there is now way in hell any standard desktop system with a HD 5450 would require a 400W PSU.

And then provided a link showing it only using 177W, fully loaded, with an overclocked Core i7 965.

Lancool PC K62
Phenom II x3 @ 3.5Ghz
4GB DDR2-800
ASUS GTX570 DirectCU II
Nas Nas Mar 08, 2011, 09:57pm EST Reply - Quote - Report Abuse
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Edited: Mar 08, 2011, 09:57pm EST

 
>> Re: PSU questions
I don't buy into that crap either. I compared the power consumption from my old 8400gs and it was around 10-12watts higher than the 5450. I'm no electronics expert but there's no way something that consumes less power will require more juice to run. Even the Nvidia gt220 which is a gaming card only requires a 300watt psu.

@jon bailey - Me and powertools don't mix. I'm probably better off and less likely to end up in the ER if I buy a new computer rather than attempt to drill holes in it myself.



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