4870 1GB Crossfire temps

[!TIMMY!]

I had a Sapphire 4870 1GB with a Akasa Vortexx Neo on it and when it was in my PC on it's own the temps were fine:

Idle - Fan 100%
50's C core
50's C shader
60's C memory

Load - Fan 100%
80's C core
80's C shader
90's C memory

But I have added in a Sapphire Toxic 4870 (left it's cooler on) below the original 4870 and the original 4870 temps have rose to:

Idle - Fan 100%
70's C core
70's C shader
80's C memory

Load - Fan 100%
90's C core
90's C shader
110's C memory

I can't play a game for more than 5 mins before the memory on the original 4870 reaches 115C.

The Toxic 4870 temps are fine, and my X-Fi sits right in front of the fan.

Idle - Fan @ 33%
50's C core
60's C shader
70's C memory


Can the Toxic really be heating up the original 4870 that much (20C)? Or can the Vortexx Neo just not cope with the higher case temp?

I have added in a extra 120mm intake fan at the front and have a side intake 120mm right over the 2 4870's.

 

[blaineoliver]

Swap them over so the original is on the bottom. What clocks are the sapphire at? Because they are obviously higher than the other 4870.

 

[dr4g0nf1y]

I'm having higher temps in crossfire with my stock fittings as was recommened the Akasa Vortexx Neo. On what you've seen would you say go for something else?

 

[!TIMMY!]

Swap them over so the original is on the bottom. What clocks are the sapphire at? Because they are obviously higher than the other 4870.

That's what I will try tonight. The Vortexx Neo's fan sticks out onto a 3rd slot, so I will have to move my lan card and sound card when I swap the 4870's over. I hope my sound card doesn't get too hot after the move. I am thinking that because the Toxic only sends half its heat out of the case so the vortexx neo is taking in air that is already 60C.

If that doesn't work I will put back the sapphire non toxic cooler on the original 4870.

Both cards are running at 780/4000.

 

[!TIMMY!]

Just to update, I have just swapped round the 2 cards and the original 4870 with vortexx neo is fine now it's at the bottom. The Toxic is getting a little hot - 100C on the memory after 15 mins of Crysis, so might have to up the fan speed from 33%.