Graphic Cards these days such as the high-end those based on the ATI HD3870X2 requires power from 2x PCI-E power source. As if that wasn’t difficult enough, ATI made it in such a way that one of the power connector has to be an PCI-E connector has to be an 8-pin version in order to enable their Catalyst Control Center’s OVERDRIVE feature for temperature monitoring and overclocking.
To make things worse, quite many power supply units (PSU) don’t come with 8-pin (some call it 6+2 pin) PCI-E connector. So, are you going to have to change your power supply unit to one that has an 8-pin PCI-E just to get that feature?
The good news is – YOU DON’T HAVE TO! Hence the purpose of this article…….
2. This guide applies to ATI’s range of products. The modification shown in this article was tested and worked fine with the ASUS EAH3870X2 1G
3. I cannot guarantee that this guide can be used in the near future. Aww heck, I think by then most PSU would come with 6+2pin PCI-E connectors already. 🙂
Update : Modification for the 9800GX2. Conditions above still apply.
How It Started
Early this year, I got my hands on the ASUS EAH3870X2 1G. My old 450w power-supply couldn’t take the load, so I upgraded my power supply unit to the Gigabyte Odin GT 550w version. I was disappointed that it didn’t come with the 8pin PCI-E connector as found in the higher range.
The thought of getting another PSU came to mind but it’s really pointless. Getting a new PCI-E connector that comes with 8pin? Possible but it’s going to take quite some time to order and have it delievered so forget it, off I went to spend more time with Uncle Google.
With a little bit of research and some experiment – VOILA! I managed to DIY my own 8pin PCI-E connector!
How To Do It
Here’s what you need……
Yes, the usual PCI-E cable AND a piece of wire. I got this one by hacking one of my spare parts 🙂 It doesn’t matter if the wire you have doesn’t look like what I have, it’ll do the trick as long as there’s contact points from both ends.
Now, here’s what the graphic card power connection point look like. Notice that this one allows you to place 8 pins.
Fit the 6pin PCI-E connector unto the card as depicted in the picture below. Secure it of course.
Next up, just the wire you have to join the 2 other un-used points.
Here’s how it looks like from another angle.
The 9800GX2 mod from Goran
For this to make it work you need: 2 cables as mentioned above by Goldfries.
1.Connect pcie connector so it fits nicely, now you have 2 empty pin’s left.
2. Take the 1st cable put it in the 1st empty pin from above and push it into the 1st pcie empty pin connector (which you already connected) so it touches the source of electricity.(1st line , 1st pin)
3. Take the 2nd cable put it in the last empty pin and push it into the pcie connector (1st line , 2nd pin)
Don’t forget to put some electricity insulate glue around the both wires, just in case if they touch each other, your graphic card won’t blow up.
Hope it works, mine works 🙂 if wanted I can make it with pictures 🙂
It’s better to use the 6pin adapter which comes with graphic card, As you don’t wan’t to mess the power supply 🙂
And Now It’s Done
Yup, just fire up the machine and there you’ll see the option for OVERDRIVE enabled.
I hope you like this guide.
It’s a sure way to gain access to ATI Catalyst Control Center’s Overdrive feature without the hassle of getting new PCI-E connectors or changing of power supply unit.
This mod was tested on
– ASUS HD3870x2
– Gainward HD4850 Golden Sample
– ASUS GTX280
– ASUS HD4870x2
– ASUS GTX295
😀 Yes, ASUS is very kind to me.