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Polaris Bios Editing ( RX5xx / RX4xx ) - Page 179

post #1781 of 3315
Quote:
Originally Posted by Na1l View Post

@Loladinas

I have exact the same score with -54mV and memory set to 2080 with uber v2.1. Maybe you should switch to uber v2.1, you will have substential increse on memory at 2125 and it shouldn't impact power efficiency. Unfortunately may memory report some EDC errors on 2080+ probably due to overheating of memory. If i run benchmarks on cold i do not have any errors.

http://www.3dmark.com/3dm/19032666
555000000000000022CC1C00AD615B41C0570E152DCB74090068C7000B031420FA8900A0030000001B11333DC0303A17
Yeah, those are the ones I was using. 2125 is the highest I can go without EDC errors. Going over that does start to show a few errors per run, more as it heats up, like you said. Oddly memory bandwidth scaling in oclmembench seems to only go to 241GB/s. The ones with the asterix are with "Uber 2.1" timings.
Code:
198GB/s@2000MHz
226GB/s@2250MHz
234GB/s@2300MHz
231GB/s@2100MHz*
238GB/s@2125MHz*
241GB/s@2150MHz*
241GB/S@2175MHz*
240GB/S@2200MHz*

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post #1782 of 3315
Quote:
Originally Posted by adamvx View Post

Strange.,.. looks like hynix mixed with samsung 0.o
Did you try to mode by hex ?

https://anorak.tech/t/anoraks-amd-vbios-hex-modification-tutorial/126/7

Thanks for the link, I'll try this later.
post #1783 of 3315
Quote:
Originally Posted by ekoaja View Post

Can you share your bios. I'm interested to use it

Sure thing once attachment works, I keep on getting a error trying to upload it.

But basically what I changed from my stock bios is:
  1. Max Memory Freq (MHz) increased from 2250 to 2400
  2. TDP (W) Increased from 110 to 225
  3. TDA (A) Increased from 107 to 175
  4. Max Power Limit (W) increased from 115 to 225

Let me know if you want me to post the timings or anything else that polaris bios editor can change values of
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post #1784 of 3315
I haven't got enough cash for cpu-mobo . So I bought a i5 2400. I spent most of my money to RX 470. I am not planning to overclock gpu. Will this cpu bottleneck rx 470 at 1440p cause I have a 2k monitor. ? ( for example severe bottleneck I mean) or is it ok in most games ?

My purchases will arrive tomorrow smile.gif

I need to say I have 420 gb SSD already.
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post #1785 of 3315
Quote:
Originally Posted by kersoz2003 View Post

I haven't got enough cash for cpu-mobo . So I bought a i5 2400. I spent most of my money to RX 470. I am not planning to overclock gpu. Will this cpu bottleneck rx 470 at 1440p cause I have a 2k monitor. ? ( for example severe bottleneck I mean) or is it ok in most games ?

My purchases will arrive tomorrow smile.gif

I need to say I have 420 gb SSD already.

check here will tell you if cpu bottlenecks on any games. ekk must buy another 8 gb ram at some point for new mass effect
Edited by Mgrandy - 4/3/17 at 4:00pm
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post #1786 of 3315
Okay, i found soemthing weird. I am using a strap from the 1500mhz of a 480 Sapphire Hynix, onto a 470 XFX Hynix - on the 1750 and 2000Mhz (the one from the bitcointalk). Was doing 850h/s on Monero. Suddenly, today, after i went on my new 8320 and changed the CPU-NB from 2475 to 2700Mhz, and the h/s jumped from 850 to 870h/s. And the RX 480, which is a stock bios/clocks, went from 600h/s to 650h/s.
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post #1787 of 3315
So I just started messing with the ceramic substrate and results are not good to start but many other variables popped up.

Basically the vrm contact area bows in the center since the screws are so far apart. If there was 4 vrm screws it wouldn't bow in the center.

Meaning only the vrm near the screw is contacting properly. Performance is horrible at the moment. Will need to come up with a solution which I believe I have one.

3m double sided adhesive on all vrm in the shape of "balls" place on each vrm first. Then actually paste the heatsink vrm contact area and place ceramic substrate on the heatsink first, then tighten.

So far test 1 firestrike 63fps, from 74 I saw once before.

Only 11fps average but thats quite a few. Plus VRM hit 85C when core was 70C... 1400mhz core 2266mhz memory.. Im also using the ceramic substrate on each module, though I rushed the installation and will need to do over again... haha

Ceramic substrate squares on each memory module is proving to work well though at 0.63mm thickness.. some bowing is occuring.. require 0.40-0.5mm thickness... all in all 2266mhz at 75 errors through firestrike isn't bad... fps was said to hit 112 max.
Edited by chris89 - 4/3/17 at 11:41pm
post #1788 of 3315
update - vrm is cool on ceramic for sure but performance isn't there... so yeah need more testing and on 16.9.2 PCIe 2.0 with defaults tesseleation amd optimized and performance

1400mhz core on stock voltage and 2266mhz memory on stock voltage and timings

card runs good maybe need more clocks? its not holding 1400mhz and going all over so yeah i lost my touch over the last week haha


Edited by chris89 - 4/4/17 at 1:17am
post #1789 of 3315
@Loladinas

it seems that EDC Errors are killing the performance or some other factors are playing a role.

@chris89

i have simulated PCI-E 2.0 to check how big impact it has to the performance, below are the results:

Firestrike, default, validated scores, drivers 17.2.1 WHQL 1266 MHz core / 2080 MHz mem on Uber v2.1, it should be an equivalent of your 2266 MHz or a bit less

PCI-E 2.0 graphic score: 13 785 http://www.3dmark.com/3dm/19047315
PCI-E 3.0 graphic score: 13 953 http://www.3dmark.com/3dm/19032666

Your score at 1400/2266 MHz: 13469

As you can see the difference is very small, nearly 170 points so PCI-E 2.0 is not a huge bottle neck. Instead of increasing clocks i would do something with temperature and wattage. Your card has to throttle a lot if i can go higher on stock clocks than you on 1400 MHz. Less voltage, less clocks and more RPM tongue.gif
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post #1790 of 3315
The thing about it is you can't simulate the difference. It's the traces in the board that have to be rated max 2.0, vs 3.0.

The difference is 5 GT/s vs 8 GT/s which is 60% faster theoretical throughput, all in the traces of the board.

If your CPU is outputting at or beyond 8 GT/s then you will see that max slot throughput of 16GB/s or near it.

Only if the CPU can output a full 8 GT/s but it really comes down to slot throughput limitations. It's double basically on Memory Read/ Write from 6,000MB/s to 12,000MB/s.

PCIe 2.0 x16 is said to do 8GB/s through the slot obviously we see as much as 6.5, maybe more if slot frequency is increased.

PCIe 3.0 x16 is said to do 16GB/s through the slot yet we see as much as 13.5, maybe more if slot frequency is increased.

haha thumb.gif

*Side Note*

I went back and took off the Ceramic plate, it caused too much bowing in the VRM contact area and also board bowing. I decided to use only Laird Technologies Thermagon T-6100, among Bergquist stock on many other components. Which has proved to reduce loss as I have mentioned before. Along with an increase in ASIC by nearly 15%.

This means if you look at my previous HWInfo screenshot from max input power of 236 watts. We see now 192 watts. That's a loss decrease of 21.92%. I did not do it to all the caps, and VRM as I would need to cool the VRM and chips on the back of the PCB as well to generate near 0 loss input to output power.

Before input was 236.836 watts and output of 209.203 watts = loss of 13.208%. Now with Input of 192.369 watts and output of 182.746 watts = loss of 5.2657%.

Meaning ASIC improved by 7.454%. Meaning much higher efficiency, which means cooler VRM and cooler card.

By the way I also surpassed my 1400mhz core 2266mhz memory score while at 1333mhz core 2000mhz memory with this configuration.



Edited by chris89 - 4/4/17 at 12:03pm
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