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Polaris Bios Editing ( RX5xx / RX4xx ) - Page 204

post #2031 of 3472
Quote:
Originally Posted by AngryWifeBeater View Post

hey, I just DDUd latest drivers 17.4 and without an tools like afterburner installed, I ran and by default I'm getting around 163 GB/s and only 2880 memory is being used.

Does this mean my card only has 2880 mb and rest of it is faulty?


All done. Press ENTER...
i think from memory them cards are 4x 1gb ram chips on the card, if so your have 1 of them chips that has failed or the solder ball bearings have got that hot that its shorted out the chip. if you have overclocked the card modded it in anyway shape or form this was bound to happen. if it worked before then it was defiantly not faulty, very rare to burn out 1 of the 4 chips and still have the card work so check drivers . software etc but its doubtful seen as how your in an overclocking thread. if you have a reflow work station you could replace or try a re ball of the broken chip. neither of which are easy if you dont know what your doing. trust me ive done a few crap box GPU's, sorry xbox. could be that theres 8x512 kb ram chips and 2 have blown but hard to tell without seen card


this is checking your last section of memory all give no response after a good 0.0487 secs
Chunk 27 3328 MB 48.7 ms 2.6 GB/s TRUE
Chunk 28 3456 MB 48.8 ms 2.6 GB/s TRUE
Chunk 29 3584 MB 48.8 ms 2.6 GB/s TRUE
Chunk 30 3712 MB 49.0 ms 2.6 GB/s TRUE
Chunk 31 3840 MB 49.2 ms 2.6 GB/s TRUE
Chunk 32 3968 MB 48.7 ms 2.6 GB/s TRUE

at this point it was already failing
Chunk 29 3584 MB 24.8 ms 5.2 GB/s TRUE
Chunk 30 3712 MB 24.9 ms 5.1 GB/s TRUE
Chunk 31 3840 MB 24.7 ms 5.2 GB/s TRUE
Chunk 32 3968 MB 25.0 ms 5.1 GB/s TRUE

just now you have lost an extra 2-4 chunks. if the chip was fine you would get the same response from all chunks. a good chunk would take 0.8ms to respond and it aint. Also 32 chunks divided by 4 or possibly 8 but looking from your stats its 8x chips on them cards so 2 have gone now (4 chunks per chip)

computer run on nano time so 0.8ms would be acceptable as a response time for the chip im guessing, 48.8 is obviously a lifetime in computer time. so a 2/8 chance of picking the right chip to reball/replace. you could follow the PCB to make locating the last chips easier. for the love of god and me dont reflow it in the cooker chip is there it just aint responding
Edited by Mgrandy - 4/13/17 at 8:13am
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my pride n joy
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post #2032 of 3472
Hello. I have asus rog strix rx 480 8gb with Samsung memory. But i can't go above 2030 MHz on memory without millions error in hwinfo, using uber xtreme timings. Maybe it's about voltage on memory? Could anyone measure this voltage on the reference card or sapphire nitro, I mean really on the card. Or maybe someone with similar card can help.
post #2033 of 3472
i have the sap nitro 4g 460 on stock ,
heres the hwinfo dont know if help ya thou
my pride n joy
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post #2034 of 3472
@AngryWifeBeater Try running 2 instances of 1900 each, or whatever to get past 35xx. I don't think the driver likes to use up all vmem on one opencl thread. If it says 2880, it's not faulty just how much the driver can allocate at one shot. You see that it went fast to almost 3600mb... Past that slow because I think it started swapping to ram, at bus speeds.
post #2035 of 3472
Still looking for help here I just want to know which value in the timing strap is responsible for memory bandwidth??
post #2036 of 3472
Quote:
Originally Posted by megax05 View Post

Still looking for help here I just want to know which value in the timing strap is responsible for memory bandwidth??

None. Timings are responsible for latency only. Bandwidth is changed by changing the frequency. A higher bus width also increases bandwidth but you can't change that.
post #2037 of 3472
Quote:
Originally Posted by Mgrandy View Post

i have the sap nitro 4g 460 on stock ,
heres the hwinfo dont know if help ya thou
No I mean on card using multimeter. I have 1.537 v.
post #2038 of 3472
Quote:
Originally Posted by bardacuda View Post

None. Timings are responsible for latency only. Bandwidth is changed by changing the frequency. A higher bus width also increases bandwidth but you can't change that.

Actually if you run stock timings on 2000 mhz, you get AIDA64 copy of around 195k. If you run the ubermix timings, you get 207k. Latency helps with the high speed memory copy and also oclmembench results. I'm not sure what the best combo is, a mild timing mod with better overclock or the best timing with little overclock. I haven't really had time to test it.

For mining timings always help more than ram speed because they do a lot of calculations. I think also on the first post by generalemon, he got increases in 3dmark/etc with the better timings!
post #2039 of 3472
How can I add custom timings to my bios?
I can edit the values of timings with Polaris but i can't change the timings.
Do I had to mod my bios manually with a hexeditor or is there any other way?
post #2040 of 3472
Quote:
Originally Posted by robnitro View Post

Actually if you run stock timings on 2000 mhz, you get AIDA64 copy of around 195k. If you run the ubermix timings, you get 207k. Latency helps with the high speed memory copy and also oclmembench results. I'm not sure what the best combo is, a mild timing mod with better overclock or the best timing with little overclock. I haven't really had time to test it.

For mining timings always help more than ram speed because they do a lot of calculations. I think also on the first post by generalemon, he got increases in 3dmark/etc with the better timings!

I never said tighter timings don't help performance. Only that they do not affect bandwidth. Bandwidth is purely a function of bus width and frequency.

Timings are actually one of the best ways to increase mining performance.
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