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post #1591 of 4365
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Quote:
Originally Posted by SourCrepe View Post

Ahhh i forgot to mention that i used the standart Vram heatsink from the refference cooler

But...i guess you mean a taller heatsink?

Oh ok, yea I'd recommend a better vrm heatsink. The stock one 90c is pretty normal.
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post #1592 of 4365
Quote:
Originally Posted by Echoa View Post

Oh ok, yea I'd recommend a better vrm heatsink. The stock one 90c is pretty normal.

Ahhh i see, the standart one is not always at 92 degrees though it only getting that temps when i overclock it, my game run smooth all maxed out now at 65 fram rates 1440p after installing the cooler although it only runs at 1266 boost clock

I guessthe temps from standart cooler is the one holding it back.

By the way thank you for your assist sir
post #1593 of 4365
Thread Starter 
Quote:
Originally Posted by SourCrepe View Post

Ahhh i see, the standart one is not always at 92 degrees though it only getting that temps when i overclock it, my game run smooth all maxed out now at 65 fram rates 1440p after installing the cooler although it only runs at 1266 boost clock

I guessthe temps from standart cooler is the one holding it back.

By the way thank you for your assist sir

yea when you overclock itll heat up pretty quickly without good cooling, get a bit beefier VRM sink and youll be fine
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post #1594 of 4365
Hey boys. I see all of you enjoying your RX 480's and want a piece of the action.

How are they for VR? Anyone have RX 480's with a Rift or a Vive?

I'm looking into building VR rigs for people. However a GTX 1080 or Titan PLUS a VR Headset is around $2000 & $2500 respectively here (Canada). That's a pretty tall order for most people.

Driving 2 screens (each eye) should be prefect for CF and VR no? I would assume scaling would be pretty close to 100%?

Anyone care to enlighten me. Regardless I am going to be building an RX 480 system soon, opinions on the best one? Or at least the top three?

Appreciated.
post #1595 of 4365
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Quote:
Originally Posted by nexxusty View Post

Hey boys. I see all of you enjoying your RX 480's and want a piece of the action.

How are they for VR? Anyone have RX 480's with a Rift or a Vive?

I'm looking into building VR rigs for people. However a GTX 1080 or Titan PLUS a VR Headset is around $2000 & $2500 respectively here (Canada). That's a pretty tall order for most people.

Driving 2 screens (each eye) should be prefect for CF and VR no? I would assume scaling would be pretty close to 100%?

Anyone care to enlighten me. Regardless I am going to be building an RX 480 system soon, opinions on the best one? Or at least the top three?

Appreciated.

Personally I think Sapphire and MSI make the best rx 480s. They should do well for VR in Xfire as I think AMD wants them to be cheap and good for VR.
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post #1596 of 4365
Quote:
Originally Posted by SourCrepe View Post

Ahhh i see, the standart one is not always at 92 degrees though it only getting that temps when i overclock it, my game run smooth all maxed out now at 65 fram rates 1440p after installing the cooler although it only runs at 1266 boost clock

I guessthe temps from standart cooler is the one holding it back.

By the way thank you for your assist sir

The VRM mosfets (MDU1511 and MDU1514 on the reference board) are perfectly fine even at 100°C. They are only slightly less efficient at high temperatures. At some point there might be problems because the whole PCB heats up and not all components/ICs are fine with such high temperatures. So removing the heat at its source is the most efficient thing to do.
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post #1597 of 4365
Quote:
Originally Posted by Echoa View Post

Personally I think Sapphire and MSI make the best rx 480s. They should do well for VR in Xfire as I think AMD wants them to be cheap and good for VR.
To be honest i love Asus Strix RX 480 though it's beautiful but you know, asus being asus
Quote:
Originally Posted by BromoL View Post

The VRM mosfets (MDU1511 and MDU1514 on the reference board) are perfectly fine even at 100°C. They are only slightly less efficient at high temperatures. At some point there might be problems because the whole PCB heats up and not all components/ICs are fine with such high temperatures. So removing the heat at its source is the most efficient thing to do.

Thats' a very enlightning info sir.
post #1598 of 4365
Quote:
Originally Posted by BromoL View Post

The VRM mosfets (MDU1511 and MDU1514 on the reference board) are perfectly fine even at 100°C. They are only slightly less efficient at high temperatures. At some point there might be problems because the whole PCB heats up and not all components/ICs are fine with such high temperatures. So removing the heat at its source is the most efficient thing to do.

I freaked the first time I saw a VRM max temp at 95C , my space heater didn't even get that hot. Oh sorry, I meant to say Sapphire Dirt3 HD6950 on OC. haha but Fallout 4 gets 50-60 FPS out of my Sapphire Nitro 4708gb card paired with my a10 6800k maxed out with tons of graphics mods, I wish I had a VR headset, because I heard FO4 is gonna be doing a VR version soon. drool.gif
    
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post #1599 of 4365
Thread Starter 
Quote:
Originally Posted by BromoL View Post

The VRM mosfets (MDU1511 and MDU1514 on the reference board) are perfectly fine even at 100°C. They are only slightly less efficient at high temperatures. At some point there might be problems because the whole PCB heats up and not all components/ICs are fine with such high temperatures. So removing the heat at its source is the most efficient thing to do.

Well depending on your leakage and vrm count it could be way less. My 4 phase 470 assuming they're same as stock 480 VRMs can do 240a @25c, 215a @ 70c, and 180a @ 100c. This is a problem for my high Asic chip preventing me from running 1400mhz @ 1.2v daily without nuking my VRMs because current draw on mine skyrockets and puts my VRMs over 100c and trips current protection . It's going to depend on your leakage what is a safe overclock and VRM temp. In my case it's 1350mhz with 80c and under VRMs.

High Asic 480 chips could potentially pose a problem at 100c VRMs. Keeping them at 70c range gives you 320amps to play with which means higher likelihood you can hit 1400mhz+ assuming your chip can do it, but VRM temps get important

Scaling for reference VRMs is

60a @ 25c
54a @ 70c
40a @ 100c
Edited by Echoa - 9/27/16 at 10:03am
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post #1600 of 4365
Quote:
Originally Posted by Echoa View Post

Well depending on your leakage and vrm count it could be way less. My 4 phase 470 assuming they're same as stock 480 VRMs can do 240a @25c, 215a @ 70c, and 180a @ 100c. This is a problem for my high Asic chip preventing me from running 1400mhz @ 1.2v daily without nuking my VRMs because current draw on mine skyrockets and puts my VRMs over 100c and trips current protection . It's going to depend on your leakage what is a safe overclock and VRM temp. In my case it's 1350mhz with 80c and under VRMs.

High Asic 480 chips could potentially pose a problem at 100c VRMs. Keeping them at 70c range gives you 320amps to play with which means higher likelihood you can hit 1400mhz+ assuming your chip can do it, but VRM temps get important

Scaling for reference VRMs is

60a @ 25c
54a @ 70c
40a @ 100c

Thats for the MDU1514 high side which has a relatively low duty factor. The MDU1511 on the low side is rated for 94A at 100°C. On the 6 phase RX 480 (that @SourCrepe has) thats plenty of headroom. It's more than twice the TDP for the whole GPU.
Edited by BromoL - 9/27/16 at 11:33am
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