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post #3031 of 4145
I am very happy with the core overclocking on my card (sapphire nitro rx480 1306 stock) that runs 1400mhz with only 1.124v (asic 84%)
Not so happy with the nitro cooler, but lets leave that out of the way for now.

However the samsung memory does not overclock at all, it reports errors even at stock speed (no stability issues though) and overclocks only up to 2050-2070mhz. With 2100 it crashes in a few minutes. Voltage through wattman does no seem to help either.... am I missing anything here?
post #3032 of 4145
Quote:
Originally Posted by Blinky7 View Post

I am very happy with the core overclocking on my card (sapphire nitro rx480 1306 stock) that runs 1400mhz with only 1.124v (asic 84%)
Not so happy with the nitro cooler, but lets leave that out of the way for now.

However the samsung memory does not overclock at all, it reports errors even at stock speed (no stability issues though) and overclocks only up to 2050-2070mhz. With 2100 it crashes in a few minutes. Voltage through wattman does no seem to help either.... am I missing anything here?
Keep it cool and it'll clock better. With normal cooling I can overclock mine to 2100 w/o errors, however when I ran a few benchmarks last week next to an open window (with the temperature outside being ~-15C) I got it to 2225 before any errors started registering.

You could also gain the same performance improvement by flashing tighter timings. At least in my case I can use 1625 timings just fine, and it doesn't seem to impact memory overclocking in any significant way.

EDIT:As it's been said before, the "memory voltage" we can control is actually the IMC voltage. Personally I haven't noticed any increase in stability with increased IMC voltage. You can undervolt it for lower temperatures under certain 2D load, but that's about it.
Edited by Loladinas - 1/16/17 at 5:21am
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post #3033 of 4145
the nitro cooler, as bad as it is for the core, at least it cools the memory directly (and not with an extra plate like msi etc). How much more cooling can you give to a ram chip (they generally dont get that hot, lots of time they dont even have passive cooling)?

Maybe your experience was due to something else? (for example better performance by the memory controller in colder enviroment?)
post #3034 of 4145
Quote:
Originally Posted by Blinky7 View Post

the nitro cooler, as bad as it is for the core, at least it cools the memory directly (and not with an extra plate like msi etc). How much more cooling can you give to a ram chip (they generally dont get that hot, lots of time they dont even have passive cooling)?

Maybe your experience was due to something else? (for example better performance by the memory controller in colder enviroment?)
Maybe it's something like heat from VRM and core raising memory IC temperature past a certain threshold.
If all goes well I'll try custom cooling this weekend and will know more on the subject.

Either way, keep it cool and it'll go faster.
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post #3035 of 4145
Whats the difference in FPS with 1400mhz vs the stock 1300mhz?

With stock 1300mhz 100fps in Overwatch, 1400mhz is 8% more, that means you get 108FPS?

And how can I test for memory errors?
post #3036 of 4145
Run HWiNFO64 that should show memory errors.
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post #3037 of 4145
Quote:
Originally Posted by neotarkilmar View Post

Whats the difference in FPS with 1400mhz vs the stock 1300mhz?

With stock 1300mhz 100fps in Overwatch, 1400mhz is 8% more, that means you get 108FPS?

And how can I test for memory errors?

Not really. It depends if memory bandwidth is bottleneck.
- perfect = 8%
- worst = 0% (almost impossible or unstable clocks)
- average = 4%

But even, if memory bandwidth is a problem higher clock should almost always give fps boost. AMD APUs are bandwidth bottlenecked yet when you overclock you gain some performance.

Power is always an issue, once you go over sweet spot ( usually stock clocks or lower) your card will drain +20-40% for 10% more performance.
Edited by IRobot23 - 1/16/17 at 11:02am
post #3038 of 4145
Quote:
Originally Posted by Hequaqua View Post

Run HWiNFO64 that should show memory errors.
how? i'm not seeing any option or settings
post #3039 of 4145
Click on the gear....go to layout....it may be listed under the "hidden" items. It will be listed in where all the GPU stats are though.

I have my nVidia card in here now...so I can't grab a screenshot to actually show you.

Maybe someone will chime in and show you a screenshot. It's listed in there though.

Here is one I found in this thread:



Hope this helps. smile.gif
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post #3040 of 4145
thanks a lot smile.gif
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