Looking to replace GTX660 with GTX1070

[evensteven93]

Hello, I currently have an ASUS CG8480 (prebuilt - I know I was dumb back then) that I bought a long time ago. Its current specification can be found here: https://www.asus.com/ca-en/Tower-PCs/ROG_CG8480/specifications/
But in summary here is what I have -> Motherboard - Intel Z77, Video card - GTX 660, CPU - Intel I7 3770K, PSU - 500W. I want to repalce my video card with GTX 1070. However, I do not know if my motherboard and my case support this card. My back I/O port looks nothing like the I/O port found in GTX 1070. I have included a picture of my I/O port above. If you want, I can take a picture inside of my case as well.

 

[Tradesman1]

Mobo and CPU should be fine will want a better PSU, not sure I' trust the 500 that came with the prebuilt rig. Those ports are part of the current GPU and will be replaced bty those on the 1070

 

[jtk2515]

the GTX 660 is a 140watt card with one 6 pin. The nvidia 1070 is 150watts single 8 pin. If you need a new PSU is up for Debate sense you did not provide +12 rail specs. Please post PSU Nameplate so we can see.

 

[jtk2515]

Looks good to me. You will need a 8 pin adapter.

 

[evensteven93]

Looks good to me. You will need a 8 pin adapter.

So I can use the 6 pin (from the GTX 660) to 8 pin power adapter to power my GTX 1070? Wouldn't it require more power?

 

[Tradesman1]

a 6 pin carries far less power than an 8 pin - I wouldn't try it. I suggested a new PSU as prebuilts are notorious for not having any more power than needed as the rig is sold and often a PSU of lower quality. It may be shown as a 500 but will guess there are 430 or fewer watts on the 12 volt rail

 

[evensteven93]

a 6 pin carries far less power than an 8 pin - I wouldn't try it. I suggested a new PSU as prebuilts are notorious for not having any more power than needed as the rig is sold and often a PSU of lower quality. It may be shown as a 500 but will guess there are 430 or fewer watts on the 12 volt rail

Would it matter in this case? Since both GTX 660 and GTX 1070 require similar power, the 6 pin should give enough power to run GTX 1070 if it can run GTX 660. Am I right on that?

 

[Tradesman1]

6 pin carries 75 watts, 8 pin carries 150....we don't know the specs on the PSU, so can it run it, probably and might well need to be pushing towards the current PSUs peak power all while running which is never good, also keep in mind if PSU does the old Snap, Crackle, Pop it often takes GPU, mobo, CPU and whatever else with it....which is the biggest reason not to skimp on a cheap or questionable PSU

 

[jtk2515]

I thought Delta was a Good brand. it's only a 10watts difference in cards. But anything can happen.

 

[Tradesman1]

a new 1070 (what about $450) and use a PSU with 432 Watts on a split 12 volt rail for a card calling for a good 500 watt PSU? a PSU that's 3-4 years old? All we can do here is offer advise. I've offered mine 😉

 

[ddferrari]

Agree 100% with Tradesman1, why risk a $450 card (and everything else) by using a low grade and surely underpowered PSU? Newegg has the Corsair CX600 600 watt PSU on sale for 36.99 (after mail-in rebate). Not the best power supply out there but miles ahead of what you have now.