need help with my computer gpu and psu

Kaitlin Kaschak · Jul 16, 2013

hello i need up upgrade my graphics card but i have a problem im stuck with a 250 watt proprietary power supply in an HPdc5850 small form factor pc so i cant upgrade the psu i need a decent low profile gpu that can run resident evil 5 at a steady 65+ frames per second right now i get around 50 frames with my current 8600GT 512 med on medium settings also my cpu is an athlon 64 X2 5800+ heres the info from my psu sticker

+12volt 7.5 amps
+5.08volt 17 amps
+3.33volt 15 amps
+12volt cpu 11.5 amps

i was thinking the HD7750 but idk i need a card that will help me achieve 65 to 75 frames per second in resident evil 5 i also have 4 gigs of ram and 800x600 screen res thanks so my question is if i run say a 9800GTX which requires a 6 pin pci off of both my pcie X16 slot as well as a second motherboard will everything be ok assuming the second psu has enough amps on the 12 volt rails i cant afford a new pc or a psu upgrade as my current psu is proprietary thanks

smeezekitty · Jul 16, 2013

The 7750 is better then both of those cards. I suggest not bothering with the old geforce four digit model cards cards.

They are quite old by now.

Kaitlin Kaschak · Jul 16, 2013

but my pc is a small form factor with a 250 watt psu will the 7750 work

Kaitlin Kaschak · Jul 16, 2013

also will using a secondary psu top power the 6 pin conection on a graphics card work even tho my main psu doesnt have that many amps on the 12 volt rails

smeezekitty · Jul 16, 2013

I don't recommend using a secondary power supply.
This is low profile: http://www.newegg.com/Product/Product.aspx?Item=N82E16814202002

Kaitlin Kaschak · Jul 16, 2013

why dont you recoment a secondary psu

smeezekitty · Jul 16, 2013

When you say secondary power supply, do you mean replace the PSU or have two PSUs?

Kaitlin Kaschak · Jul 16, 2013

what i mean is use the proprietary psu in my pc to power the cpu mobo and pciexpress slot and then use a second psu to power the gpu's on board pcie 6 pin conector so what i wanna do is use one psu to power the pc and one psu to power the GPU

smeezekitty · Jul 16, 2013

Thats what I thought. I have heard of problems with that.
You normally want all the rails to be common to one negative. If you split the supply, that isn't true.

http://www.tomshardware.com/answers/id-1653115/detecting-asus-radeon-7770-graphics-card.html

Kaitlin Kaschak · Jul 16, 2013

well will an AMD HD7750 run on a power supply with these specs

+12volt 7.5 amps
+5.08volt 17 amps
+3.33volt 15 amps
+12volt cpu 11.5 amps

smeezekitty · Jul 16, 2013

Oh yikes. I thought it was 17 amps on +12. That is not good at all. Honestly it is amazing that it powers your system as it is.

I am not sure what to do at this point.

Maybe someone will come in with better suggestions.

nerrawg · Jul 16, 2013

Hrmmm, knowing the GTX 9800 and the 7750, the 7750 is much closer to what is possible for you than the 9800 which is a lot more power hungry. The 8600 gt is rated around 45W and I think the 7750 is about 75W although you could try undervolting it and underclocking it, which might help. I think some of the software also lets you set a max powerdraw? I could be wrong though. At idle it will be using less than your 8600 gt at least:
http://www.anandtech.com/show/5541/amd-radeon-hd-7750-radeon-hd-7770-ghz-edition-review/23

As smeeze stated, I would be most worried about the amps on that 12V rail

If you are considering a 7750, what is you budget and what is your mobo? AMD AM2+? THe 5800 is a powerhungry CPU from what I remember, you might be able to find an equally fast athlon x2 nowadays that uses less, but it would have to fit your mobo I guess. That might be one way to reduce system power

Guest · Jul 16, 2013

You can always get an inexpensive case, move your hardware over to it and upgrade the power supply and GPU.

arrpee

Kaitlin Kaschak · Jul 16, 2013

i cant upgrade the power supply its a proprietary hp custom built psu to fit my small form factor pc from what i was told by hp tech support the psu is custome wired to fit my specific motherboard

Guest · Jul 16, 2013

Kaitlin Kaschak :

To me it sounds like they have built the PSU to fit your case, so a new PSU will not fit.That doesn't mean it wont work. Check to see if there are any unusual connectors that are not found with regular PSUs. Also talk with people who work with computers. The people at HP and other companies don't think outside the box and would prefer to sell you a new computer.

arrpee

Kaitlin Kaschak · Jul 16, 2013

Kaitlin Kaschak :

a new psu will fit as i have modded the case to fit a new psu how ever the new psu i bought isnt giving the board the right amount of power it needs

Guest · Jul 16, 2013

http://www.tomshardware.com/forum/375142-33-compaq-dc5850-graphics-card-upgrade

SR-71 Blackbird
Moderator
abU
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

This will get the job done in your SFF ^

I found this by SR-71 Blackbird, if you don't want to bother with the PSU it should help

arrpee

Kaitlin Kaschak · Jul 16, 2013

the link takes me to there main page

Guest · Jul 16, 2013

Kaitlin Kaschak :

Use the top link.

arrpee

Kaitlin Kaschak · Jul 16, 2013

the 6670 isnt a decent gaming card i need a card that will allow me to play resident evil 5 at minimal 60 frames per second

smeezekitty · Jul 16, 2013

The 6670 takes more power then the 7750.

Kaitlin Kaschak · Jul 16, 2013

is the 7750 a good gamers card

smeezekitty · Jul 16, 2013

It is a decent card. It will atleast double your framerate.

The 8600 is a 43 watt card so the 55 watt 7750 card should do ok although it is at the very limit.

Kaitlin Kaschak · Jul 16, 2013

so if i get 50 frames on medium settings at 800x600 how well will i ho on high settings with a 7750

smeezekitty · Jul 16, 2013

Hard to say for sure but I would you should be able to hit 120 FPS on those settings.

need help with my computer gpu and psu

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