Decided to upgrade my graphics card and now i can't run games without pc failing

SheppyNaught · Nov 16, 2014

I recently got a new graphics card called SAPPHIRE 7950 3G BOOST

I plugged it in correctly and now every time I try to play a game it just crashes instantly and
i have to manually plug in my power cable in and out wait a minute or 2 then restart the pc for me to be able to get back on to it

I have 650W power supply, I don't understand where i have gone wrong. Could anyone please help me as this is for a present for my son and well he is really dissapointed with me

13thmonkey · Nov 16, 2014

Did you install the drivers?

SheppyNaught · Nov 16, 2014

13thmonkey :

Yes I had installed the correct drivers and uninstalled my old drivers

13thmonkey · Nov 16, 2014

What PSU is it? Make and Model if you can? I assume you have plugged in the extra power cables? Sorry having to cover all of the bases.

SheppyNaught · Nov 16, 2014

13thmonkey :

I am intirely sure what the make and model of the PSU is, and yes I plugged in all the cables and what not except the crossfire one as i am only using 1 graphics card.

13thmonkey · Nov 16, 2014

Cool, you need to have a look at the PSU, not all 650W PSU's are equal. It's the most likely cause given what we know at the moment.

SheppyNaught · Nov 16, 2014

13thmonkey :

Where can I find the make and model, On the side of the PSU or?

13thmonkey · Nov 16, 2014

just on the side of the PSU, you'll see a rating plate let us know what that says about Amps at 12V

SheppyNaught · Nov 16, 2014

I am not sure, struggling to find it as I can't move the pc at the moment give me a minute

SheppyNaught · Nov 16, 2014

Don't have a clue mate sorry.

13thmonkey · Nov 16, 2014

let me know when you find out.

SheppyNaught · Nov 16, 2014

It says 40A I think

13thmonkey · Nov 16, 2014

Make and model? It's important as cheapo ones will claim 40A, and not be able to deliver it, giving you the symptoms you have.

SheppyNaught · Nov 16, 2014

So I see your point, the make and model i am not sure off I know it was a cheep power supply though

SheppyNaught · Nov 16, 2014

Lets say it was the PSU, What PSU that is relativly cheap do you think will be able to sustain the card as well as a FX-6100 3.9 ghz and 16GB of ram?

13thmonkey · Nov 16, 2014

Most power is on the 12V rail (a good enough assumption for now), so with 40A (although I'm not sure you've got this right) that's 480W to play with. Now one guage of a PSu's quality is how much of its power it can deliver on the 12V rails compared to it's total wattage, 480/650 is not good, good PSU's will be up at 630/650.

You card could be pulling 200W, your CPU is a 95W unit. So that's nearly 300W of your 480W (the 480W is probably overstated. Also given your other symptom of having to pull the PSU cord before you can restart it points to the PSU failing safe (which is lucky as it could have failed unsafe).

So you are looking for a 500-600W PSU, with most of its power at 12V.

http://www.tomshardware.co.uk/forum/id-1804779/power-supply-unit-tier-list.html
Try and stay in Tiers 1&2. I'd suggest you look at shops you're happy to use ( I don't know what country you are from) newegg in the states, ebuyer, scan, overclockers, aria, amazon in the UK, what fits your budget and see where they sit on the list, it's the easiest way around to do it.

sora · Nov 16, 2014

I think your power supply cannot hold the power of the graphics card.

SheppyNaught · Nov 17, 2014

13thmonkey :

Most power is on the 12V rail (a good enough assumption for now), so with 40A (although I'm not sure you've got this right) that's 480W to play with. Now one guage of a PSu's quality is how much of its power it can deliver on the 12V rails compared to it's total wattage, 480/650 is not good, good PSU's will be up at 630/650.

You card could be pulling 200W, your CPU is a 95W unit. So that's nearly 300W of your 480W (the 480W is probably overstated. Also given your other symptom of having to pull the PSU cord before you can restart it points to the PSU failing safe (which is lucky as it could have failed unsafe).

So you are looking for a 500-600W PSU, with most of its power at 12V.

http://www.tomshardware.co.uk/forum/id-1804779/power-supply-unit-tier-list.html
Try and stay in Tiers 1&2. I'd suggest you look at shops you're happy to use ( I don't know what country you are from) newegg in the states, ebuyer, scan, overclockers, aria, amazon in the UK, what fits your budget and see where they sit on the list, it's the easiest way around to do it.

I can give you a more accurate Answer soon, and i also noticed that it gets really hot where my ram is?

13thmonkey · Nov 17, 2014

what ventilation do you have in your case? how many fans front and rear, sounds like none to me.

Decided to upgrade my graphics card and now i can't run games without pc failing

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