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Accelero Xtreme III (and IV) + 5700XT tips

Hey everyone, I do a lot of reading but don't post much on this forum.  I figured I would share my experience with installing an Arctic Accelero III (or IV) on an RX 5700/5700XT.  Let me start by saying I purchased a Sapphire branded 5700XT along with an R5 3600 on launch day.  I was disappointed to find my card was unstable and would heavily throttle even on stock settings.  It was doing this because the junction temperature would quickly reach 110 degrees +.  I did try Gamer's Nexus' thermal paste and washer trick but that did not help even with a very aggressive fan curve.  I figured I was unlucky and received a card that had a slight manufacturing defect in the stock cooler or possibly a bad component running hot.  Since I planned to eventually use an aftermarket cooling solution anyways I decided to give it a go.  I went with the Accelero III as the IV's backplate would not fit in my application.  Below are pictures accompanied by tips of each step.

 

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This was my solution for heat sink placement.  Due to the large mounting bracket you need to get creative on where you mount the VRAM heatsinks.  Use the 4 "skinny" heatsinks mounted almost to the far edge from the GPU for the chips along the side.  You can use 2 "square" heatsinks for the top chips but they need to be mounted almost halfway off of each chip to clear the heatsink.

 

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I HIGHLY recommend using the factory back plate.  I originally mounted everything up without and the card just isn't sturdy enough on it's own.  Use the 6 factory backplate screws and size M2.5 nuts with plastic or fiber washers between the board and the nut.  I would recommend washers around 1mm or so thick.  If you go too large the factory screws aren't long enough.  Also, the rear mounting bracket won't quite clear the back plate.  Instead of using the 4 black spacers the Accelero instructions call for use the 4 white 4.5mm spacers included with the kit (they're the ones intended for the front mount on older GTX 4 and 5 series cards).

 

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Everything mounted and ready for installation.

 

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I am truly amazed at the difference.  I now have a quiet card that runs properly and has a good amount of overclocking headroom.  I was playing around with the soft power play table mod running at 1.25 volt on the core with a +50% power limit and I never went beyond a junction temp of 84 degrees and the GPU temp stays in the 60's.  For daily driving with a 1.2v core and +50% power limit I am 10-15 degrees less.  VERY HAPPY!

 

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Maybe it's time to get in bed with team red.

 

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What is the average core clock you get after the mod? I watched HardwareUnboxed overclocking video and it seem like this card is somewhat memory limited, did you overclock yours?

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Thanks for this, I'm also going to be doing this when my card arrives on Saturday, My problem is

 

Did you use the included glue ?

I was reading not to use it if you plan to reuse the small heatsink in the future or sell the card etc.

 

So to anyone that knows a bit more about this issue should i buy thermal tape ? 

https://www.amazon.com/gp/product/B075FR45DV/ref=ox_sc_act_title_1?smid=A2UPOYF43ISB1E&psc=1

0.15mm or 0.25mm?

 

anything else i should know about?

 

I've done something like this in the past with a amd 6850 my lord over 7 years ago, my fan died on that card so i ordered a accelero dont remember which one.

fun fact the card still works gave it to one of my friends .

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1 minute ago, xAcid9 said:

What is the average core clock you get after the mod? I watched HardwareUnboxed overclocking video and it seem like this card is somewhat memory limited, did you overclock yours?

Yes, I can get the card to run 2100-21teens at all times with a 1.25v core and 50% power limit.  My card hits a wall at anything above this.  On my daily driver settings I'm 40-50mhz less.  I also noted what Steve found in the video that overclocking the memory slightly hurt performance.  It is true in actual gameplay scenarios but curiously enough my 3Dmark scores increased when OCing the memory.  My VRAM would max out at 925mhz and was only partially stable.  I could run it stable at 920mhz.

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16 minutes ago, JustSum said:

Thanks for this, I'm also am going to be doing this when my card arrives on saturday, My problem is

 

Did you use the included glue ?

I was reading not to use it if you plan to reuse the small heatsink in the future or sell the card etc.

 

So to anyone that knows a bit more about this issue should i buy thermal tape ? 

https://www.amazon.com/gp/product/B075FR45DV/ref=ox_sc_act_title_1?smid=A2UPOYF43ISB1E&psc=1

0.15mm or 0.25mm?

 

anything else i should know about?

 

I've done something like this in the past with a amd 6850 my lord over 7 years ago, my fan died on that card so i ordered a accelero dont remember which one.

fun fact the card still works gave it to one of my friends .

I personally didn't have any issue using the included glue.  I had to remove and move heatsinks after I had glued them and let them cure overnight.  As long as you don't get crazy with the amount of glue you should be fine. 

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2 minutes ago, Desh14 said:

I personally didn;t have any issue using the included glue.  I had to remove and move heatsinks after I had glued them and let them cure overnight.  As long as you don't get crazy with the amount of glue you should be fine. 

ok lets just say i dont want to deal with this in the future .

 

I'll try the thermal tape 0.15mm if that works i'll stick with it , if not i'll use the included glue .

 

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Quick tip Not even lower vrm heatsink will work my idle temp did drop to around 45c but my memory temp went upto 100c so i guess i did something wrong i just decided to return the card and the cooler back. I'll just wait for aftermarket or wait for a waterblock under 120$. I was going to try the way @Desh14 did it with the stock vrm heatsink that came with the accelero. But i had some small heatsink laying around that i used those instead.

 

Also I Dont know if i received a bad batch of grizzly kryonaut paste but that is just hard to spread , So while i am spreading it also picks it up.

I guess i'll keep using artic silver paste has not failed me with spreading .

 

If anyone is going to try to use the accelero, use the original back plate like Desh recommended . I used these 2 nuts/washer

https://www.amazon.com/gp/product/B06Y3TTJ4Q/ref=ppx_yo_dt_b_asin_title_o00_s02?ie=UTF8&psc=1

https://www.amazon.com/gp/product/B07H3WGLJN/ref=ppx_yo_dt_b_asin_title_o00_s02?ie=UTF8&psc=1

those worked out. or just go to homedepot & buy a few for cheap .

One thing that came out positive i finally cleaned my pc after a year.

 

Enjoy the mess. 

 

 

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One thing i noticed the accelero doesn't cover the Full Square around the Gpu, Well it does cover it , Theirs just some gaps which i can guess    dust can go in??   Since it looks to me that the gpu is higher then the surface around the square .

if that makes any sense .

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highest Time spy Score 8962 with an i5 8600k @5ghz

Graphics score
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Graphics test 1
66.79 FPS
Graphics test 2
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CPU score
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CPU test
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This was a keeper gpu, but not going to be dealing with all this just to fix the ram temp.
Max oc was 2120 @ 60% power limit , only got my ram to 900 didn't try any higher .
 
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  • 2 months later...

I miss some photos. How did you use the original back plate? I have the artic IV and the backplate of the IV is too thick. I would know your trick to use the oginal backplate.

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  • 6 months later...

Anyone got any tips. Just installed a extreme III on my RX5700 but I'm getting a junction temp of 100C. Voltage is 1.1mV core is 2000mhz. Have changed the OC via morepowertools. 

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  • 3 months later...

I did the same mod (placed the heatsinks as you did) to my reference Sapphire 5700 XT today but the temperatures worry me.
 

While using Furmark I get the following results using 2x Noctua NF-A12x25 at 1200RPM

GPU: 71°C

GPU Junction: 98°C

Memory Junction: 106°C

VRM1: 81°C

VRM2: 71°C

 

The temps look okay to me except the memory, should I buy other VRAM heatsinks? What about thermal pads on the backplate, would they help? What would you recommend?

@Desh14 How are your vram temps?

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