Topic Title: AMD R9-295x2 heat and performance
Topic Summary: heat ceiling and performance
Created On: 07/02/2014 10:48 PM
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 07/04/2014 06:09 PM
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Earnhardt
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Originally posted by: TheOnlyDoor Yeah I opened up both side panels and ran the same tests. Still throttling at 74c.

 

 My thermostate sais my downstairs is at 76F (whatever that is celsius). It's summer time. That shouldn't matter though as far as QA for this card is concerned.

 

 I researched the model number of the Rad fan that came with the card at it pushes about 50 CFM.

 

 I ordered a 120mm fan from newegg that pushes 103 CFM...so we'll see if that makes a difference.

 

Make sure it's a "high pressure" fan.Which are designed for radiators,Like these Corsair  fans:

http://www.newegg.com/Product/Product.aspx?Item=N82E16835181040



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 07/04/2014 07:18 PM
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black_zion
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I still don't think the GPU temp is the problem, and that it is another component of the card such as the VRMs or VRAM chips. Either that or you have both a malfunctioning temperature sensor or a faulty component, neither of which will be helped by new fans.

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 07/04/2014 07:48 PM
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backFireX64
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Originally posted by: black_zion I still don't think the GPU temp is the problem, and that it is another component of the card such as the VRMs or VRAM chips. Either that or you have both a malfunctioning temperature sensor or a faulty component, neither of which will be helped by new fans.

 

Gpuz can come in handy for the vrms.

But, 15-20 frames lower on Crysis than the gtx 680 sli ?

That is not something to swallow with the 295x2.

That is not normal, even if we are to blame the drivers.



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amd catalyst 14.7 RC3 aug12

 07/04/2014 09:24 PM
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stumped
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I can't find it now, but I read something about the temperature not being read from the processor but by using the temp of the cooling liquid. I don't know what that has to do with the rice situation in China , but I thought I'd throw it in.



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 07/05/2014 01:50 AM
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HoneyBadger84
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Originally posted by: black_zion I still don't think the GPU temp is the problem, and that it is another component of the card such as the VRMs or VRAM chips. Either that or you have both a malfunctioning temperature sensor or a faulty component, neither of which will be helped by new fans.

... how can you say you don't think temps are the problem? I've said it twice now, 74-75C IS hot enough for this card to start throttling according to reviews and AMD's own throttle specs.  The temperature the GPUs are hitting is 100% the problem that needs fixing, be it the pumps on the blocks not working properly, the radiator needing better airflow, whichever.

Hopefully the second fan will help. 

Originally posted by: stumped I can't find it now, but I read something about the temperature not being read from the processor but by using the temp of the cooling liquid.

That would mean the situation is even worse as the actual liquid temperature in cooling systems can be up to 15-20C cooler than the component its cooling, so lets hope not lol



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GPUs: 3x HIS R9 290X Reference (Core) Editions in TriFire, Max Load Temps: 71C/70C/71C during OC testing :-P

 07/05/2014 04:52 AM
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Thanny
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Originally posted by: TheOnlyDoor My thermostate sais my downstairs is at 76F (whatever that is celsius). It's summer time. That shouldn't matter though as far as QA for this card is concerned.

 

 

It matters quite a lot.  If you're starting with warm room air, then heating it up further inside the case, you're severely limiting the ability of the radiator to remove heat. 

Putting another fan on the radiator (on the other side in pull configuration) is worth trying.  I'd put it on a controller so you can push it only as fast as you need to for the card-controlled fan to keep up.

 

 07/05/2014 10:36 AM
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TheOnlyDoor
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I understand about room ambient tempurature. However, my house isn't a hut in hottest Africa. If mild tempuratures in a house with AC is going to cause this card to throttle then that should have been discovered in testing. I shouldn't have to drop my house temp to 60F and wear a sweater for this card NOT to throttle.

 Im going to try the fan I ordered once it comes in 2-3 days. I dont have room where I have the current fan/rad setup to add a second fan as a second fan would be blocked by my ram. The other position I could use is taken up by my H80i cpu cooler.

 Fingers crossed the new fan drops the temps.



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AMD FX 8350 @ 4.7, M5A99x EVO R2.0 motherboard, Corsair H80i cpu cooler, Radeon R9-295x2 , 32 gig Corsair Dominator Ram, Corsair HX 1050w psu, Samsung 840 pro SSD, Thermaltake armour revo case, 4 intake fans and 2 top exhaust.

 07/05/2014 11:14 AM
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HoneyBadger84
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Have we by chance taken a peak at your VRM Temps via GPUz yet? It'd be nice to see them readout from during a benchmark or something, and see how badly you're throttling and if you're hitting 75C before the throttling happens, which is what would cause it first & foremost.

I said as soon as I saw the 295x2 that having it on a single-fan radiator was a horrible idea, you're the third person I've seen talking about this exact issue with it that it sounds like the radiator is just incapable of handling the amount of heat this thing puts out.



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CPU: i7 3930k @ 4.6GHz 1.29V (Corsair H110-cooled) ~ Motherboard: Asus RoG Rampage IV Extreme 
RAM: G.Skill Sniper Gaming Series (4x4GB 2133MHz, CL9) ~ PSU: Corsair AX 1200W ~ Case: Enermax Fulmo GT
GPUs: 3x HIS R9 290X Reference (Core) Editions in TriFire, Max Load Temps: 71C/70C/71C during OC testing :-P

 07/05/2014 11:18 AM
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black_zion
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... how can you say you don't think temps are the problem? I've said it twice now, 74-75C IS hot enough for this card to start throttling according to reviews and AMD's own throttle specs. The temperature the GPUs are hitting is 100% the problem that needs fixing, be it the pumps on the blocks not working properly, the radiator needing better airflow, whichever.


Because numerous reputable review sites using the stock configuration have not been able to get the card to 75°C except under power virus situations? Changing the fans is not addressing the problem.

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 07/05/2014 01:22 PM
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TheOnlyDoor
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Well when I first got the card I hadn't researched what stock fan amd was using for the Rad. So i had a an extra corsair AF120 quiet edition laying around and replaced it with the stock 295x2 fan. At load the temps went close to 80c at that point so I immidiatley put the stock fan back on the Rad.

  The reason was that the corsair fan only puts out 39.88 CFM where the stock 295x2 fans put out close to 60 CFM.

Logical deduction suggests that if I put a 120mm fan that puts out 103 CFM that I would see a DECREASE in temps as I saw an INCREASE in temps with the much weaker fan.



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AMD FX 8350 @ 4.7, M5A99x EVO R2.0 motherboard, Corsair H80i cpu cooler, Radeon R9-295x2 , 32 gig Corsair Dominator Ram, Corsair HX 1050w psu, Samsung 840 pro SSD, Thermaltake armour revo case, 4 intake fans and 2 top exhaust.

 07/05/2014 01:43 PM
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TheOnlyDoor
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GPUz, dosent show my vram temps only usage.



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AMD FX 8350 @ 4.7, M5A99x EVO R2.0 motherboard, Corsair H80i cpu cooler, Radeon R9-295x2 , 32 gig Corsair Dominator Ram, Corsair HX 1050w psu, Samsung 840 pro SSD, Thermaltake armour revo case, 4 intake fans and 2 top exhaust.

 07/05/2014 02:46 PM
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black_zion
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Not necessarily true. The CFM rating for a fan is only useful if you are moving unobstructed air, such as a ceiling fan or one of those turbo room ventilation fans. When you are moving air through an obstruction, such as a dust filter or a radiator, then you need to look at its static pressure rating. The higher the static pressure, the higher its capability to move air through that obstruction. 38mm thickness fans are the best at this, but 25mm fans with special design features (with a higher price tag) are starting to become more common.

If you want the absolute best you can get, it's this Delta fan with a static pressure rating of 27.48 mm H2O. It also sounds like a 747 taking off in your case, and will cause all of your other fans to spin backwards...I used mine on my Xigmatek HDT-D1283 before I got this H60, now I use it with a modified funnel as a wonderful duster.

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 07/05/2014 07:24 PM
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TheOnlyDoor
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Well I already ordered this one...it's on the way:  http://www.newegg.com/Product/Product.aspx?Item=N82E16835132022

 It's only 10 bucks lost if it dosen't lower the temps. Might try yours next.



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AMD FX 8350 @ 4.7, M5A99x EVO R2.0 motherboard, Corsair H80i cpu cooler, Radeon R9-295x2 , 32 gig Corsair Dominator Ram, Corsair HX 1050w psu, Samsung 840 pro SSD, Thermaltake armour revo case, 4 intake fans and 2 top exhaust.

 07/05/2014 07:32 PM
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black_zion
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3mm H2O static pressure rating...

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 07/05/2014 09:20 PM
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TheOnlyDoor
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Right, thing is I dont know the static pressure of the stock Radiator fan for the 295x2....this will be an experiment.

 Temps will cooler or they wont.



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AMD FX 8350 @ 4.7, M5A99x EVO R2.0 motherboard, Corsair H80i cpu cooler, Radeon R9-295x2 , 32 gig Corsair Dominator Ram, Corsair HX 1050w psu, Samsung 840 pro SSD, Thermaltake armour revo case, 4 intake fans and 2 top exhaust.

 07/06/2014 10:56 PM
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Thanny
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What case do you have?  Why couldn't you put the pull fan on the outside?

 

 07/07/2014 11:18 PM
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TheOnlyDoor
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I have this case: https://www.thermaltakeusa.com/products-model.aspx?id=C_00001915

I'm not sure what you mean by "outside"? Do you mean literally installing the fan, blades spinning, outside of the case itself?



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AMD FX 8350 @ 4.7, M5A99x EVO R2.0 motherboard, Corsair H80i cpu cooler, Radeon R9-295x2 , 32 gig Corsair Dominator Ram, Corsair HX 1050w psu, Samsung 840 pro SSD, Thermaltake armour revo case, 4 intake fans and 2 top exhaust.

 07/08/2014 12:21 AM
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HoneyBadger84
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Originally posted by: TheOnlyDoor I have this case: https://www.thermaltakeusa.com/products-model.aspx?id=C_00001915

 

I'm not sure what you mean by "outside"? Do you mean literally installing the fan, blades spinning, outside of the case itself?

 

Yeah, he means having it like this air flow wise:

Fan < Case Wall < Radiator < Fan

I ran a loop a long while ago like this for my ol' Q9650, didn't cause any issues, you just have to make sure that the exterior fan won't be messed with by the case's wall at all, most cases nowadays have flat grilles so it's not an issue on fan ports.



-------------------------

CPU: i7 3930k @ 4.6GHz 1.29V (Corsair H110-cooled) ~ Motherboard: Asus RoG Rampage IV Extreme 
RAM: G.Skill Sniper Gaming Series (4x4GB 2133MHz, CL9) ~ PSU: Corsair AX 1200W ~ Case: Enermax Fulmo GT
GPUs: 3x HIS R9 290X Reference (Core) Editions in TriFire, Max Load Temps: 71C/70C/71C during OC testing :-P

 07/08/2014 12:43 AM
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black_zion
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Just flipping the fan over so it pulls in instead of exhausting out. Shouldn't cause an issue since you have a top exhaust fan.

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 07/08/2014 09:49 AM
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HoneyBadger84
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He pretty much said he doesn't wanna do that if I remember right, and I don't blame him since that radiator spits hot fire-air from cooling those 2 GPUs all by itself.  If I were him I'd try ghetto rigging it completely outside of the PC, but that depends on the case how difficult it would be to set that up.



-------------------------

CPU: i7 3930k @ 4.6GHz 1.29V (Corsair H110-cooled) ~ Motherboard: Asus RoG Rampage IV Extreme 
RAM: G.Skill Sniper Gaming Series (4x4GB 2133MHz, CL9) ~ PSU: Corsair AX 1200W ~ Case: Enermax Fulmo GT
GPUs: 3x HIS R9 290X Reference (Core) Editions in TriFire, Max Load Temps: 71C/70C/71C during OC testing :-P

AMD Support and Game » AMD Radeon™ Graphics » AMD R9-295x2 heat and performance

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