In relation to this question, will my PSU support 2x4870's in CF? I believe the wattage would be alright, but it only has 2x6pin PCIE connectors when a 4870 says it requires 2 itself, which means I would need 4. I've heard of people running them without 4 though, is that possible? Why would it state that it supports SLI and Crossfire? Any input would be great.
Your link doesn't work so I can't tell which one it is. However, there are cards which only require 1 PCI-E plug each, so its crossfire/SLI certified for those types most likely. Also- you can use 2x4 pin Molex connector to 6pin PCI-e connector adapters and get the other 2 plugs you need.
Yes I am interested about the adapter idea, since I know that is my only other option other than buying a new power supply. If I have to buy another power supply I might as well just buy a 5870 and I don't want to do that. I figure adding another 4870(if possible) is a better deal.
So, how reliable are these molex-PCIE adapters? Also, is this the right one?
Yup- that PSU should do you as long as you aren't OCing a ton, or running tons of HDD's etc. That adapter is fine, but you may get some with whatever 4870 you buy to crossfire with it, and did you not already get one with the 4870 you have?
Also- don't run both Prime95 and Furmark at the same time- that puts a stress and power load on your CPU and GPU that you will never see in the real world of running your PC and it could be too much.
I don't have anything else hooked up to it, it's a pretty bare system overall, with just the basic components. So I would be set to buy another XFX 4870 1GB then you think? I will check to see if I got a cable with the 4870 when I get home, never thought of that.
How was your experience with the 4870's omgitzfatal? Why do you have a 5850 now?
That is correct. The other adapter did the same thing, it just had the option for a 6pin OR 8pin PCI-E connection. you would have needed to use 4 Molex connectors for it too. A single molex connector does not provide enough power for a PCI-E connector.
I'm a little worried about heat too since the cards are going to be pretty close, but then again, the 4870's are hot in general. My card is about 63c right now. I wonder what it will be like when I throw the other one in haha.