Hello,
Help guys.
I just bought a new MSI 7770 OC PE 1gb GDDR5 128bit card to match my Sapphire 7770 OC ed 1gb GDDR5 128bit card.
Now here's the thing, I tried to run both cards on my Gigabyte 970A-DS3 motherboard (local store and website states that it's crossfire ready)... but it wont post or go the the boot screen. I tried using each card as a solo card and yes they work perfectly fine.
Also, i noticed that I have both cards on the board connected with the bridge and the 2nd card is running without the 6pin power connector and the system will boot... BUT! if I connect the 6pin connector, the system wont boot at all. It will just power the LEDs and fans on the system.
my theory is that it's either the motherboard or the powersupply that's giving me a hard time. but hear me out, i know it's not the PSU as the new 28nm chips are very power efficient (about ~80w max TDP each + fx4100 = ~240w)... but it could still be a possiblity. Need help! I feel I wasted money on something I can't use
to make it more clear, heres my whole specs:
FX4100 3.6ghz @ 4.0ghz
Gigabyte 970A-DS3 motherboard
G.Skill Trident 8GB DDR3 RAM 1600mhz
-MSI 7770 OC PE 1gb GDDR5 128bit << connected to PCIE 16x
-Sapphire 7770 OC ed 1gb GDDR5 128bit << connected to PCIE 4x
HEC Cougar ST 600w
---additional info
I have an extra 400w PSU from my old build and tried using that to power my second card but still the same. still no boot screen or no post screen. I can tell because i have a corsair m60 mouse and if the system is going boot/post, the lights on my mouse will flash.
The method i used to power the second card was using a jumper to boot the 400w PSU by itself w/o another motherboard.
Help guys.
I just bought a new MSI 7770 OC PE 1gb GDDR5 128bit card to match my Sapphire 7770 OC ed 1gb GDDR5 128bit card.
Now here's the thing, I tried to run both cards on my Gigabyte 970A-DS3 motherboard (local store and website states that it's crossfire ready)... but it wont post or go the the boot screen. I tried using each card as a solo card and yes they work perfectly fine.
Also, i noticed that I have both cards on the board connected with the bridge and the 2nd card is running without the 6pin power connector and the system will boot... BUT! if I connect the 6pin connector, the system wont boot at all. It will just power the LEDs and fans on the system.
my theory is that it's either the motherboard or the powersupply that's giving me a hard time. but hear me out, i know it's not the PSU as the new 28nm chips are very power efficient (about ~80w max TDP each + fx4100 = ~240w)... but it could still be a possiblity. Need help! I feel I wasted money on something I can't use
to make it more clear, heres my whole specs:
FX4100 3.6ghz @ 4.0ghz
Gigabyte 970A-DS3 motherboard
G.Skill Trident 8GB DDR3 RAM 1600mhz
-MSI 7770 OC PE 1gb GDDR5 128bit << connected to PCIE 16x
-Sapphire 7770 OC ed 1gb GDDR5 128bit << connected to PCIE 4x
HEC Cougar ST 600w
---additional info
I have an extra 400w PSU from my old build and tried using that to power my second card but still the same. still no boot screen or no post screen. I can tell because i have a corsair m60 mouse and if the system is going boot/post, the lights on my mouse will flash.
The method i used to power the second card was using a jumper to boot the 400w PSU by itself w/o another motherboard.