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Overclocking
So here is the situation: as we said, if you want to get the full potential of performance from the HD 5970, you will have to overclock it. This is more true in this case for this video card than perhaps any other reference design video card we've come across in a long time. With a card -- such as , for example -- the HD 4830, it is a good idea to overclock it, getting that extra step of performance. But with the HD 5970 you have to overclock it just to have it run at 100%, as the GPU's can certainly handle more than a 725 MHz clock without much trouble.
Also required for the overclocker: ATI's Voltage utility. Especially made for the HD 5970, the over-volt utility, supplied by AMD to us (and we presume, will come with available for all coming models of this video card) is almost required. Expect to flounder around the 790 MHz mark for the core clock without using the tool.
The over-volt tool could not be simplier. You load it up, and you have two options: regular voltage ( 1.05V for the core, 1.10V for the memory) or over-voltage (1.1625V / 1.15V). One thing to keep in mind: if you are running your HD 5970 overclocked, and you ever have a overclocking-related display driver failure, you'll have to re-open the voltage tool, set the speeds to default, apply, then set them back to over-volt mode. Your clock overclock will stay constant in a crash, but the voltage settings gets reset. We figured this out after some big-time head scratching when our once-stable OC's mysteriously started to fail.
Okay down to the numbers now then. So the very low default speed for the HD 5890 is 725 MHz for the core, and 1000 MHz for the memory. After a long-time testing, and running the fan at full speed, we found 935 MHz / 1235 MHz to be fully stable (we achieved higher speeds but nothing lasted more than 30 minutes in our stress tests). If you consider these overclocks from the distance from the default clocks, then they are quite exceptional. However if you figure the HD 5890 can easily handle HD 5870 speeds, then this overclock is 10% for the core, which is fairy average, and hardly over normal operating speeds for the memory (clocked as a HD 5870). So in conclusion, the overclocking here really isn't that exciting.
On the other hand it is possible we just didn't get a good flavor of chips passed our way. Pre-release rumors suggested that speeds up to 1000 MHz for the core clock might even be possible. In our case though, the HD 5970 performed as you'd expect considering what a HD 5870 can do.
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I think if you put it in a folding farm you could fill up the pci-e x16 slots but not crossfire them and have it work. At least that's what ive seen some pics with nvidia cards doing. not sure if ati will work that way.
The REAL question is....Will it be worth the extra cash? ATI cards will be cheaper to be sure.
Then I saw the price. Yeah, I don't think so. For that price they should personally customise my case to actually fit the damn card, and put my hard drives into drive bay caddies for me, as there's no way to leave those where they are right now and fit this monster.
What on earth were they thinking making it so long?
I COULD probably in theory manage to use this, but it would require the removal of my hard drive cage and the installation of three drive bay caddies.
I hope the Nvidia offering is SMALLER. My 8800GTX barely fits as it is.
but you could always wait for a few more months, and im sure the price will drop significantly. it is only that expensive because its the best ATI has to offer.
Various issues include BSODs, flickering texture surfaces in games like Oblivion, strange... lagging light trails in games like X3 Reunion (engine trails leave a ghost image)...
Weird lines on the screen unless you turn off the second processing core...
Bloody hell. >_<
Why does ATI suck so much at drivers?
But when I tried to get some info out of them about their GF100 cards, they didn't even reply to say no they couldn't tell me anything.
ATI at least replied and told me some confusing jargon when I asked if their cards had any kind of PhysX support or equivalent. I had no idea what they were on about, but they replied!
You can run games with physx and have it enabled on ati cards but it will seriously slow the card down. At least that was the case in cryostasis, but that games main selling point other than the ambiance was the amount of physx used in the game.
Ati does have a bit of driver issues but you usually never have to roll them back like you have to do with nvidia's drivers if something goes wrong.
And also this when I asked for clarificaton:
Seems ATI has some kind of equivalent to PhysX processing, but I have no idea if it really improves performance in any way compared to simply running PhysX on the CPU.
Any ideas what they meant?
AMD and Nvidia will continue battling for the top graphics card until one of them either stops making them or, and this part is from me, until it is no longer necessary to make gpu's more powerful as there's probably more potential power to be used than there is actual use. Like with the holodecks then holograms that are being developed, after those are out and can take any game imaginable at 100% realistic graphics there's really nowhere to go except for more power efficiency.
What I want to know now is wtf will sci fi books write about in the future? Other than jedi mind control we're eventually going to hit a brick wall.
As for the physx support they dont support it per card like nvidia has a dedicated card, at least that's what it sounds like. But you can still run it.
And if the PhysX in the game isn't being accelerated, then what the crap is this "stream processing" doing?
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