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Polaris Bios Editing ( RX5xx / RX4xx ) - Page 196

post #1951 of 3455
Holy **** 101°C? Dude I would back off the overvolt.
post #1952 of 3455
laughingsmiley.gifbiggrin.gif

Some say dial it back others say let it rip haha Meant to run 120C? sure maybe 120C yields 120 fps? biggrin.gif
post #1953 of 3455
Well, 100 degrees for the VRM is the maximum limit for me, but will decrease it. Now i am thinking to replace the stock VRM heatsink, but it looks massive compared to the Mono Plus VRM heatsinks. What do you think about this ?

P.S I will just put a 120mm cooler over the VRM`s and they should hover around 45-50 degrees.
Then i will squeeze everything from the GPU and hopefully i will be able to reach 1450mhz on a reasonable voltage, max to 1.2v.

My memory does not go over 2100mhz on stock timings and 2050/1750 timings .
I flashed the bios with Uber-Light timingsrunning at 2000 which gives me the same performance as 2100mhz/stock timings and more performance than 2050/1750 strap without adding an additional load over the memory controller keeping lower temps.
Edited by ziXs - 4/11/17 at 2:53pm
post #1954 of 3455
Yeah good luck ziXs... everyone has a different grasp on how to overclock these cards so if you have any questions or need help. Be sure to ask me or any of us to help.

As for my card... My stock 65288 limit (Being Stock 1.25V is stock max for all Polaris). Voltage depends on temperature and thermal properties of your specific GPU. The 65288 value remains the same across all Polaris, and it will behave differently on non-reference cards.

As for reference my 65288 as far as I believe so far not extensively tested all variables to rule out everything. Is core clock of 1,469Mhz. I am trying 2188Mhz memory as well so maybe the two are not happy together. Maybe 2000Mhz to 2110Mhz at 1469Mhz could work. I don't know. For in game, it's not putting up with 5k 1469Mhz core clock. Although 1466Mhz is perfectly stable. So I want to narrow down the exact issue. So far I believe I have reached the end of the 65288 offset of -350mv to usVddcOffset 900mv. I believe if 1000mv usVddcOffset, this clock and well beyond is totally do-able.

Anyway this is the screenshot of GPUz. I really like 47GPixel/s & 211.5GTexel/s @ 280GB/s.

I could run GPGPU benchmark at 1469Mhz though had 75C limits set. It did pull the full 6.75 GFlops though.



Edited by chris89 - 4/11/17 at 3:19pm
post #1955 of 3455
Why use 65288 when you can put voltages in the editor instead? Is it better somehow?
post #1956 of 3455
Quote:
Originally Posted by bardacuda View Post

Holy **** 101°C? Dude I would back off the overvolt.

100 degrees on VRM is still within the operational range for this chips. It may be a bit scary for you as water boils is such temperature but this chips have been designed to operate normal in such temperature. It's harmless.

@ziXs

if you would like to insert some screenshot in the posts it is better to use buil-in windows snipping tool than print screen button.
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Little facker
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post #1957 of 3455
If you do consider the lead-free nature of the tiny amount of solder on such chips, they will effortlessly melt and merge around this temperature over time. Cold solder joints etc, the super-heating and cooling doesn't strengthen the bond, it weakens it. I won't say it's not designed and meant to run at well above 100C. What I will say is it will not last continuous at this temperature. It will fail.

BTW - 65288. yes 65288 is ideal. It decides whats best in all conditions. Plus it's cooler.

This is 65288 the highest it will go pretty much... I could squeeze more out of it on another system PCIe most likely but it's not bad.


Edited by chris89 - 4/11/17 at 4:18pm
post #1958 of 3455
Edit, I meant 207,000

On 2050 mhz with ubermix timings I get around 207, 000 (fixed) memory copy. Which timings are you using?

"The lead-free solders melt at higher temperatures of about 217°C/422°F compared to 183°C/361°F for the lead-based option. The PCB materials and electronic components must therefore be able to withstand the higher temperatures."
Edited by robnitro - 4/11/17 at 6:29pm
post #1959 of 3455
I recently used a heat gun at 400F, within 1 second (before it had even reached optimal 400f probably high 200-300's) lead free of a small amount instantly melts. So with smaller quantity it melts at lower temperature. I guess we'd call it less dense mass of lead free solder. A thicker mound would take more heat. In computers less solder is used to keep resistance to a minimum.

That's cool man! 207,000 copy right on. I'm on PCIe 1.1 so I'm limited. I think I threw up a PCIe 2.0 score. Maybe it's faster by a bit...idk
post #1960 of 3455
I know the original lead free solders like on the xbox 360 were junk. I had reflowed a few of them only to get issues later.

But my trusty cheap gigabyte 7950, running at almost 300 watts never had a problem, even when the vrm's were solid 100+. I was trying to see how much it could take and ran occt overnight, lol.

There was a different bios that read higher vrm temps and would throttle me hard so I went back to the non boost bios because of that!
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