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Help me get my memory stable at 2000mhz on my 7970 on air

post #1 of 12
Thread Starter 
I can get up to around 1950 and run some mining with it stable for a while and even furmark for a bit but it seems when I load up 3dmark It all goes south from there.
the longest I have been able to keep it running is just past the first demo but once the actual benchmark started running it went kaput on me.

Any ideas on how to get this memory up there and get it clocked at 2000mhz or higher? How high does the ram on these things normally go and so what should I expect on this?
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compy jr
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post #2 of 12
i think you wont be able to. by the sounds you have hit the limit that too much data is being sent to your vRAM. You might be fine at 1800 - 1900 i would expect.
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post #3 of 12
1950MHz is already very high for a 7970, most 7970s top out at 1800-1850 MHz on water.
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post #4 of 12
Quote:
Originally Posted by rx7speed View Post

I can get up to around 1950 and run some mining with it stable for a while and even furmark for a bit but it seems when I load up 3dmark It all goes south from there.
the longest I have been able to keep it running is just past the first demo but once the actual benchmark started running it went kaput on me.

Any ideas on how to get this memory up there and get it clocked at 2000mhz or higher? How high does the ram on these things normally go and so what should I expect on this?

Pray? biggrin.gif

Your taking your memory OC too far. ECC is probably pulling out your cards hair. That said, you probably have a golden card if it's able to get to 1950 and work without getting a striped screen instantly. Dial it back to 1500-1600 if you're mining non stop and call it a day.

What core OC do you get?
    
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post #5 of 12
Generally speaking, upping ram clocks don't really improve performance once you surpass 1800 or so, however if you really need that extra clock, either up the memory voltage, and if thats maxed out or locked, go to bios. I have heard that the 7970 ghz bios improve memory timings and allows you to clock higher. If your memory voltage is locked, you could find a different bios to flash it with to see if it can unlock that voltage. Flashing is risky and can brick the card, so proceed with caution. anyways, good luck with the OCing.
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post #6 of 12
Quote:
Originally Posted by ThriftyPo View Post

Generally speaking, upping ram clocks don't really improve performance once you surpass 1800 or so, however if you really need that extra clock, either up the memory voltage, and if thats maxed out or locked, go to bios. I have heard that the 7970 ghz bios improve memory timings and allows you to clock higher. If your memory voltage is locked, you could find a different bios to flash it with to see if it can unlock that voltage. Flashing is risky and can brick the card, so proceed with caution. anyways, good luck with the OCing.

Nope, don't counsel him to flash a ghz BIOS when his default BIOS is probably worlds better. Your card doesn't need a Ghz BIOS. You just need to dial back your OC to make it stable. If you flash a Ghz BIOS into that probably GOLDEN 7970, you're gonna regret it. That is, until you reflash your old BIOS, if you back it up first wink.gif
    
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post #7 of 12
Thread Starter 
tried the GHZ bios and it's bunk for me. I can boot up and get the computer to run but the problem is it doesn't seem to want to run the drivers right and instead gives me a code 43 error.
Edited by rx7speed - 6/4/13 at 8:04am
compy jr
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compy jr
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post #8 of 12
hmmm..... it seems the bios trick doesn't work....
As for nonehxc does have a point, I mean if it ain't broke, why fix it? tongue.gif
Try upping memory voltage and see if that allows you to increase your memory. If your memory voltage is locked, try finding a bios of a default 7970 (no ghz) that has the voltage unlocked. Again, backup your original bios, just in case.
One more thing to add, I'm only really helping you because you want to up your memory clock. However, many of the other people pose a very logical point, I mean your 7970 is pretty much as good as it can get. I personally wouldn't go any further as it seems you have hit your maximum ceiling. I'm only posing ideas for you to surpass the ceiling just because you want it, but not because its a good idea.
Edited by ThriftyPo - 6/4/13 at 8:11am
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post #9 of 12
Thread Starter 
I understand and this isn't an everyday thing. Just more of a I want to push it to it's peak see where it stands and then chances are I'll take it down from there.

You guys are right it doesn't make huge difference in most benchmarks and about the only thing I can see the difference in is when doing litecoin mining and the difference is from going between 400kh/s vs 600kh/s. otherwise you guys are easily right it doesn't make much sense to push it like that. Plus if most are only hitting 1800 or so on water guess want to see if I can get up a little higher then most anyone else on just air.


here is a screenshot of the most current furmark run with it at 1949mhz. Core was clocked down just to prevent any issues with the core locking up. Voltage on the core is a bit higher right now then stock because I was running the core at 1225. When I dropped the core I forgot to drop the core voltage. The memory though is at stock voltage. If I was to up the memory voltage what is the safe limit on these things?




Also any idea why my VRM temp doesn't show up?
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post #10 of 12
upto 1.7V is fine for a 7970, tho try for around 1.65V. a possible cause for VRM temps not showing up is the card doesnt have any sensors. if you know it does then try a later version of GPU-z or hwinfo.
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