Your GDDR5 didn't degrade and we've already discussed this in another thread. And for what it's worth, I fail to see how you can call it garbage as long as it's running the default clock speed without any issues. It wasn't selected by the ATI engineers so that you could overclock it to 1100MHz, that's overhead for the stock speed of 900MHz.Originally Posted by GAR
Qimonda dies, its been proven many times, with the 8800GT and now the 4800 cards, my memory is ok, at 1075 its fine, im going t leave it here and see if it gets any worse or not, well see in 2 weeks lol
I have 3 friends with 8800GT's all overclocked for over one year now and none of them have had issues. I really think your opinion about Qimonda is FUD. The fact that the memory is only required to run at 900MHz and is able to run FAR above that proves that there's no quality issue.
Do you even have a 4870? What bases are you speaking on that the memory can run "far" above the stock specs? As for memory frequency not having an effect, well it does because just like any chip more speed + more volts = more heat, which means that there is more risk to kill your ram. 10% OC is a big OC, and quite likely stable OC on the ram combined with a core OC will not be achieved using stock voltages on either. Just under 1100, possibly, over that no way.
Oh as an FYI, so far I have worked with about 4-5 4870s.
Umm overclocking doesn't volt mod your card....it uses a slight bit more power as someone in other 4870 overclocking thread her proved. Like .003 volts change both idle and load from 750/3600-790/4400.
Proper cooling/ fan speed fix to keep things cool as you overclock is needed to avoid overheating causeing degredation however. Granted thats just my take on it.
Ah forget it...
4870 OCs with no voltmods that go past 825/1075 are not going to be 100% stable in almost any case. That has been my experience so far with 5 cards, various brands. I think this qualifies as a pretty good sample of cards so I'm fairly confident in what I am saying. Hence the reason why I said more speed + more volts = more heat. I know that for every single OC I did on the 4870 past those figures I stated above some sort of volt mod was required to achieve rock solid stability in every tool.
The memory dying from "OC" conversation has died lets move on to something a bit more interesting.
Why are you speaking of volt mods? This most recent discussion was in regards to memory degradation at stock voltage, which there is none.
No, I sold my 4870 about two weeks ago to buy a 4870x2 which I have now. I had my 4870 for just over 2 weeks with no issues running 790/1100MHz. That was looping some benchmarks overnight as well.
FYI, stock specs are 900MHz for the 4870, if it can run anything above that, it's just a bonus, not a requirement.
Also FYI, when memory can't handle a certain speed, you get artifacts or lock-ups, either way, you'll bump the speed down to retain stability so no damage can be done regardless. It's VERY dfficult to kill memory unless you're increasing voltage considerably.
Last edited by Blkout; 08-19-2008 at 01:35 AM.
how does your X2 clock? can you clock the cores independently with Overdrive? is the second core a bad overclocker because of the extra heat?
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Haven't tried to be honest. From a few reviews I've seen on the 4870x2 overclocked, it doesn't overclock all that far, usually around 780 core and about 1000 memory. The framerate gain is so minimal that's it doesn't seem worth it for the increased the heat output. Since one core obviously runs hotter than the other, I'm going to hold off overclocking until I get my EK FC water block in the next week or so.
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