Power supply and graphics card for Dell Optiplex 755 Mini Tower

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yoosuf290

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Dec 7, 2011
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Hey guys!
So here are the specs for my Dell Optiplex 755 Mini Tower:
Intel Core2Quad 2.66GHz Q6700
8GB RAM
500GB HDD (MIGHT add another HDD!)
Windows 8.1
OEM 305W PSU
No graphics card
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So first is the graphics card. After much research, I'm deciding to buy the XFX AMD Radeon HD 7750 1GB GDDR5 graphics card. Does it even fit this system with no problems? it also requires at least a minimum of 450W of PSU.

I have bad really bad experiences with 'living on the edge' with PSU's before. So I want to get at least a hundred watts high for PSU. I came across this:
http://www.ebay.com/itm/321497662196

Brand is Enlight. What do you guys think of the PSU? How will it perform? Do you guys think it will truly deliver 600W as mentioned? Ever had any experiences with this brand?

Also, if you guys are wondering what I use this computer for - I use it for pretty much everything but gaming. I am not a big gamer.
I use it for multimedia stuffs like Photoshop and Adobe Flash, some HD video editing (I know, I know, this processor ain't that great compared to the core I processors but whatever!). To create some 3D designs (Its not funny anymore, stop laughing :/). Also web design and programming.
And occasionally and very rarely, some OLD games...like even MS-DOS old sometimes, LOL! Ah, can't take away that nostalgia yo!
 
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prit87
ha ha ....uchiha prit87 :D
yes you dont have to change anything your motherboard should have a 24 pin thats powers the board a 4 or 8 pin connector which powers the cpu and the rest you know the pcie cables that comes with it you can bundle them up because u are not going to use them.
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prit87

prit87

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okk i will recommend u a hd 7770 much better than 7750 and will fit your case ......and for psu get a decent psu increasing the wattage will not make your psu better so get a xfx 550 watt psu or seasonic 520 watt psu they are more than capable to handle hd 7770 .
 
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yoosuf290

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I heard from other people that HD 7770 doesn't fit the Dell Optiplex 755? :/ And does the XFX 500Watt PSU fit my computer?
 
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prit87

prit87

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use a measuring tape and check the gpu clearance hd 7770 is 7.6 inches in length so if your case have a 8 inch gpu clearance then the card will fir perfectly and xfx have 450 and 500 watt psu there is no 500 watt psu and yes the psu will fit the case .
 
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yoosuf290

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But read Kisianik's post here: http://www.tomshardware.com/answers/id-1765593/graphics-card-computer-optiplex-755.html

Thats why I'm concerned for the graphics card.
As for the psu, should I get this:
http://www.ebay.com/itm/301227659958

And these connectors to make the PSU compatible for my system: http://www.ebay.com/itm/260914144325
 
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prit87

prit87

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okk i see then get this one instead its 6.9 inches and have single bracket ....http://www.newegg.com/Product/Product.aspx?Item=N82E16814131559&cm_re=r7_250x-_-14-131-559-_-Product
the psu is fine u dont even need that much power for this card.
 
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yoosuf290

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It seems like it takes 95w (the card itself).
It seems like I need at least 426w PSU for my system according to http://www.extreme.outervision.com/PSUEngine.

So do I need these connector for that XFX PSU: http://www.ebay.com/itm/260914144325 ??

Or, do the built in connectors of the PSU work and fits the motherboard just fine?
 
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prit87

prit87

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the card doesn't need any external power connector just plug screw and play ......so u dont need any kind of extra cables with your new psu your psu comes with 1 x 24 pin connector 2x 4 pic connector few sata ports and 2 x pcie connectors which u wont need.
 
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yoosuf290

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I see. So the PSU cable's fits the built-in motherboard with no problems and I don't need any kind of converting cables?! Right on. Thanks Uchiha (prit87)!
 
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prit87

prit87

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Jun 16, 2014
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ha ha ....uchiha prit87 :D
yes you dont have to change anything your motherboard should have a 24 pin thats powers the board a 4 or 8 pin connector which powers the cpu and the rest you know the pcie cables that comes with it you can bundle them up because u are not going to use them.
 
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yoosuf290

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Dec 7, 2011
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What do you think of this card?
http://www.ebay.com/itm/321444010363

Would that fit? The dimensions of the card are 7.32 x 2.7 x 0.56 (inches). But the problem maybe the width.

http://imagizer.imageshack.us/a/img9/8392/05optiplex745singlebrac.jpg

But according to that picture of my motherboard, its not a problem right?
 
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yoosuf290

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Well, that card is DDR3, I want some DDR5. So the PowerColor card you showed is the best fit and in performance? Or is there anything better?
 
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