Which is most stable/reliable, DDR3 or GDDR5 ?

The card has a fan. It is not a low profile card.
I just saw the link and that is for a DDR3 card; mine is GDDR5
No, I am not monitoring temperatures; I don't figure temperatures should even be a factor with anything I am doing.
I edit a photo and when it looks to suit me I save it; if it overheats doing that, then something bad is wrong.
I can wake this machine up from a two hour sleep and the screen go black when I open a tab.
I might go through five days of editing photos and it not miss a beat, then black-out five times the next day.
I never had a single problem with the integrated graphics during normal use and the only reason I got the card is that a few of the programs just do not work with integrated graphics.
The only plus about the card is that I can at least use those programs that before I could not.

Card was bought new on Amazon; sold by EVGA and handled via Amazon; support was a joke; it was just a delaying action to make the 30-day grace period pass; after that, trying to submit a ticket always sent me to an EVGA "sorry this is not available at this time" page; talking to a real person on the phone was no better.
It must be nice to have so many customers that you can treat them like dogs and still have a never ending stream waiting to throw their money at you.

Why 1GB instead of 2GB ?

Thanks.

ThrashZone said:

Hi,
1gb might need less power for real time usage opposed to a 2bg card
Like I said I had a gt640 asus and saw no real issues using cc6 3d rendering engine which 1gb was the minimum requirement
I was using a 220w acer factory power supply at the time too.

None the less I doubt ddr3/ ddr5 has anything to do with the issue
You just got a defective card = it happens
asus support is no better might actually be worse fwiw

Thanks for the explanation about 1GB vs 2GB.

I do now have a bit better grasp on the mysteries of the video card world.

Thanks.