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Old June 29, 2008, 03:02 PM
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Default 4870 deaths random or otherwise?

Just wondering what the situation is with reports of 4870's dying.

Is it a RAM quality issue?-wondering if I should cancel my order until the cause of these dead cards is pinpointed.

Hopefully its just bios flashes going wrong or the ATI overdrive tool killing them as maybe its not optimized for them yet???
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Old June 29, 2008, 03:10 PM
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All is well with the "Mysterious 4870 deaths"

People were corrupting their bios and then flashing with a corrupted bios.

W1zzard has made available a fix which seems to be bringing dead cards back to life
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Old June 29, 2008, 03:22 PM
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Thanks-I'm glad it can be attributed to people monkeying with their bios Sky's comments were also reassuring in his review thread.

I've heard people saying their stock cards went belly up without any tinkering and they think the DDR5 overheated or was bad..perhaps they just messed the card up and are covering for it.

Wonder who made the DDR5 modules anyway and what their thermal limits are?
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Old June 29, 2008, 03:45 PM
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Me thinks the gddr5 is gonna be a bit of a challenge for a time until the product
matures, more importantly the drivers mature.

The cards that apparently went down, without the bios corruption did so while in crossfire.
It may be necessary to have both cards memory at exactly the same speed in xfire, or problems might arise.

Also having the memory clocks too high might interfere with the controller
initializing the memory at a cold bootup.
There is a "training handshake" between the controller and the memory, as far as I can understand right now and it's sensitive

The whole thing could be crap and the victims were ly'ing, only time will tell

Qimonda, a subsiduary of Infineon makes the memory,

I don't think there's anything to worry about.
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Old June 29, 2008, 03:57 PM
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Here is what I think is happening:

GDDR5 is based on new technology and people are pushing it FAR beyond what these first production modules are capable of. I mean Christ, I was able to push it to 4400Mhz which is what? A 30% overclock? Try pushing standard GDDR3 to a 30% overclock without bumping the voltage and see where it gets you.

People jumped the gun with the overclocks they demanded of these cards and are blaming it on ATI. Not only is that pathetic, but it also shows us what alot of the overclocking community has become: zero caution and noobs trying to push their hardware past safe overclocks. You may say: "no guts no glory" but tell that to the people with dead $300 cards due to BIOS flashing.
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Old June 29, 2008, 04:06 PM
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I think its definitely best to let the hardcores sort out all the glitches before regular users start bios modding and whatnot. Some guys had their 4850's volt-modded on the day of release! Thats nuts!
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Old June 29, 2008, 07:44 PM
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Well I for one am not going to dare to overclock my 4870's. Because if anything goes wrong I am sure that OC is not allowed in the warranty. Also the cards are to hot for my liking.
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Old June 29, 2008, 08:40 PM
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I found some data sheets on the Qimonda memory!

GDDR5 - Qimonda AG

There's a nomenclature sheet in there to
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