R9 295x quadfire issue

[nkd1990]

Hey everyone,

I recently bought another 295x2 to crossfire and when I go to play games or benchmark the second 295x2 core never goes above 300mhz and memory stays at 150mhz. The top card goes 1018 core during games and benchmarks. But the second card never seems to "fire" up

I have tried disabling ULPS
crossfire is enabled in CCC
all cores show in GPU-Z
running latest offical AMD driver (havent tried the beta driver yet)
System info

1600w PSU
x79 MSI big bang x power II
i7 4930k cpu
Two Sapphire R9 295x2 (power connected properly / in pci x16 express slots)

MSI afterburner

GPU1 core 300 mhz / 1018 mhz gaming
GPU2 core 300 mhz / 1018 mhz gaming
GPU3 core 300 mhz / 300mhz gaming
GPU4 core 300 mhz / 300 mhz gaming

any help will be greatly appreciative! Thanks in advance

 

[redgarl]

1. Quadfire is buggy and really few games actually draw a benefit from it (usually it even lower performances)
2. AMD is using a function to idle a card depending on the graphical needs. Might pretty well be what you are experiencing.
3. Try to bench actual games with one card and with both cards.

I honestly think you are just experiencing the plague of quadfire. Most games don't support it or underperform over Crossfire.

 

[nkd1990]

Thanks redgarl,

I have tried running 3d mark extreme(ultra) which would require the card to kick on but it doesnt, same with a select few games I have tried that I know scale well such as BF4.

 

[Marsh23]

Same boat as you performance is waaaay to low. U running win 7 or 8?

 

[nkd1990]

Same boat as you performance is waaaay to low. U running win 7 or 8?

Yes, you have to run both cards in a x16 PCI lane. I had the cards in the top two pci lanes and the second card didnt work as for it was x8 lane moved it to the third PCI lane and the card worked because it was X16. so make sure your mobo has two x16 PCI lanes. Also make sure your power supply is big enough for the system and the cards. The cards take about 1250 watts of power. I had a 1600w power supply. Hope this helps you as for it helped me!

 

[nkd1990]

also the cards suck benchmarks and games show 60-70 fps but it plays like you have 20-30fps. I sold mine bought a titan x and it beats the hell out of them. The benchmarks show the titan x to suck but everything I have played maxed out at 4k resolution (true 4k btw) I get 90-110 fps on bf4 and I forget the fps on other games. But the titan x kicks the hell outta those amd cards. They were horrible performers for myself at true 4k resolution 3860x2140 or whatever.