AMD Radeon R9 295X2 Owners Thread

tommybhoy · 18 Apr 2015 at 18:58

If you use some googlefu youtube should have carbide/kraken dual gpu setups.

Sobtanian · 19 Apr 2015 at 07:15

Hi all,

Really sorry if this has been addressed earlier, I tried a search, promise.

I have an MSI 295x2 and a gigabyte 290x trifire. Been playing GTAV using latest drivers.

Problem I have is, the 295 will suddenly drop to 300mhz 2D idle clocks then back up again, causing massive FPS spikes obviously. Memory speeds stay the same. With a bit of monitoring, I think this is happening when one of the 2 internal cards hits over 70 degrees.

Interestingly, the 290 is much warmer but keeps its 3D clocks.

Is there a way to prevent this?

Thanks.

EDIT: just confirmed it with Heaven. The moment the card hits 72 or so, it immediately drops to 2D clocks until it goes to less than 70 and goes back up again.

I should add the the 295x2 is set to 1040 GPU speed to match the 290x, with no increase in voltage or power limit percentage, because it has always been stable as such. Perhaps that's the mistake? Not sure if I can somehow manually control its pump speeds or set a curve like with fan-cooled GPUs.

Telecaster · 19 Apr 2015 at 10:53

Have I read somwhere that there is some undervolt potential if you plan to run stock clocks only? Anyone know if it makes much difference?

CaptainRAVE · 19 Apr 2015 at 11:24

Mine is undervolted and overclocked

Telecaster · 19 Apr 2015 at 11:42

Nice! I took the plunge Friday and bought one from a competitor at £470, should be a tight squeeze if I can get it in the case + PSU + rad, I haven't seen any pics of one fitted in an M1.

My only concern will be temps so if I can undervolt it and keep it stock I think I will be happy with that result.

LtMatt · 19 Apr 2015 at 11:43

Sobtanian said:
Hi all,

Really sorry if this has been addressed earlier, I tried a search, promise.

I have an MSI 295x2 and a gigabyte 290x trifire. Been playing GTAV using latest drivers.

Problem I have is, the 295 will suddenly drop to 300mhz 2D idle clocks then back up again, causing massive FPS spikes obviously. Memory speeds stay the same. With a bit of monitoring, I think this is happening when one of the 2 internal cards hits over 70 degrees.

Interestingly, the 290 is much warmer but keeps its 3D clocks.

Is there a way to prevent this?

Thanks.

EDIT: just confirmed it with Heaven. The moment the card hits 72 or so, it immediately drops to 2D clocks until it goes to less than 70 and goes back up again.

I should add the the 295x2 is set to 1040 GPU speed to match the 290x, with no increase in voltage or power limit percentage, because it has always been stable as such. Perhaps that's the mistake? Not sure if I can somehow manually control its pump speeds or set a curve like with fan-cooled GPUs.

I can field this one, the 295x2's vrms are throttling. Show us a picture of inside your case, we're going to need to improve your airflow.

Sobtanian · 20 Apr 2015 at 20:10

You are indeed right sir, and airflow will SUCK currently because I'm messy.

Solved it for now by keeping the case side open.

Any recommendations for a good case for this setup

LtMatt · 20 Apr 2015 at 20:46

Sobtanian said:
You are indeed right sir, and airflow will SUCK currently because I'm messy.

Solved it for now by keeping the case side open.

Any recommendations for a good case for this setup

Glad to hear that sir.

The Corsair 750D is perfect for the 295x2. Here's a picture from my Red Baron 295x2 QuadFire setup, featuring that case.

Watlinguk · 20 Apr 2015 at 21:43

Matt your rig is <3!!!!

Telecaster · 21 Apr 2015 at 18:01

Well it fits in an Ncase M1. Just...

CaptainRAVE · 21 Apr 2015 at 18:32

AMDMatt said:
I can field this one, the 295x2's vrms are throttling. Show us a picture of inside your case, we're going to need to improve your airflow.

I think mine are doing the same. Core is cool, but vram temps must be getting high with GTAV (combined with the warmer weather). Going to have to look at the airflow of my case.

LtMatt · 22 Apr 2015 at 19:05

I'm back in the club.

Kaapstad · 22 Apr 2015 at 19:08

AMDMatt said:
I'm back in the club.

I would be interested to see how a 295X2 + 290X + 290P run in quadfire.

LtMatt · 22 Apr 2015 at 19:10

Kaapstad said:
I would be interested to see how a 295X2 + 290X + 290P run in quadfire.

I don't have any 290P's left unfortunately.

TaKeN · 22 Apr 2015 at 19:12

Sell me a 290x Matt?

Kaapstad · 22 Apr 2015 at 19:12

AMDMatt said:
I don't have any 290P's left unfortunately.

Flash a bios onto a 290X.

I know, you don't have any 4gb 290Xs either.

LtMatt · 22 Apr 2015 at 19:13

TaKeN said:
Sell me a 290x Matt?

I've only got 8GB versions and as they were provided for me, i can't sell them. Not that i would anyway, the extra memory comes in handy at 4k.

TaKeN · 22 Apr 2015 at 19:14

AMDMatt said:
I've only got 8GB versions and as they were provided for me, i can't sell them. Not that i would anyway, the extra memory comes in handy at 4k.

It was worth a try

Please tell me you had something underneath the card in the photo? and that it wasn't laying directly on those paving slabs :eek:

LtMatt · 22 Apr 2015 at 19:17

TaKeN said:
It was worth a try

Please tell me you had something underneath the card in the photo? and that it wasn't laying directly on those paving slabs

It was, i was careful though.

It's yet to see any use at all, had it a few days now. Will give it a test on the weekend and see how it clocks.

It's going to live an easy life mostly, apart from the odd benching run.

Kaapstad · 22 Apr 2015 at 19:20

AMDMatt said:
It was, i was careful though.

It's yet to see any use at all, had it a few days now. Will give it a test on the weekend and see how it clocks.

It's going to live an easy life mostly, apart from the odd benching run.