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How should I know???

post #1 of 6
Thread Starter 
My lil brother is asking me to build him a hot gaming rig, so I'm out looking for the very best affordable GPU.

I stumble across the Radeon 7970 Ghz edition and think sweet, thats even better than the standard one, I'll have that.

But then the thought strikes me: isn't that just the same card as the normal 7970, just overclocked by the manufacturer?

Because I would not enjoy paying good dollars for stuff I can do for myself. But I really don't have a clue - hodor.

So I turn to you: please help me find my way through the maze of OC, Black, Ghz and whatnot/gargle my goolies-Editions!
POW
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POW
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post #2 of 6
Welcome to OCN smile.gif

Yes you're sort of right, you can overclock the card yourself, but most of them are voltage-locked, which means it won't reach its potential.

However, I've heard good things about the MSI TF cards which, so far don't seem to be locked....yet.

Or you could go for a 770 or the 7950.

Here's how to put your rig in your sig:
http://www.overclock.net/t/1258253/how-to-put-your-rig-in-your-sig/0_20
TheSadFlute
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TheSadFlute
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DyingHeart
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post #3 of 6
Thread Starter 
Quote:
However, I've heard good things about the MSI TF cards which, so far don't seem to be locked....yet.

Thanks for the warm welcome and the sig-rig-guide thumb.gif

Thats exactly what I'm talking about: The GPU looks great, but it says ''OC'' at the end - does that mean its already overclocked,
or just suitable for overclocking?
POW
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POW
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post #4 of 6
Quote:
Originally Posted by Sandwell View Post

Thanks for the warm welcome and the sig-rig-guide thumb.gif

Thats exactly what I'm talking about: The GPU looks great, but it says ''OC'' at the end - does that mean its already overclocked,
or just suitable for overclocking?
Welcome to the forums.

The OC means both, I suppose. It is a factory overclocked card and is suitable for overclock. The HD7970 GHz has a "reference" stock clock: 1GHz Engine Clock (up to 1.05GHz with boost). Every card that leaves AIB factories with a clock higher than that is an "OC" card.

eXXon touched a good point. There are HD7970 that are "voltage locked". They can and will overclock but, not as high as the cards with the right VRM chips to digitally overvolt the card. Chips like Coiltronics or Volterra. In this cards, the owner can change the voltages digitally, via software, in apps like Afterburner or PrecisionX

The only way to overvolt the cards that lack the digital VRMs is modding the hardware itself.

So, if you are into overclocking, before you buy a card, do your research; read the reviews; search the forums. In some place, there's an reviewer or an owner saying if the card accepts or not the voltages in Afterburner or PrecisionX.
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Kandalf, The Grey
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post #5 of 6
Quote:
Originally Posted by Sandwell View Post

Thanks for the warm welcome and the sig-rig-guide thumb.gif

Thats exactly what I'm talking about: The GPU looks great, but it says ''OC'' at the end - does that mean its already overclocked,
or just suitable for overclocking?

- Std. 7970 is @ 925MHz speed (Most of them have the blower-type reference cooler) and are usually unlocked.
- OC 7970 is @ 1000MHz (or 950MHz with Boost to 1000MHz) and are most likely voltage locked except for a few here & there. (Gigabyte OC W3 cards do not go past 1045MHz stable...avoid)
- GHz edition 7970 is @ 1050MHz (some @ 1100MHz) which many can overclock but not all (kind of the reverse of OC cards in terms of overclocking).
- Black is @ 1000MHz & I think is used by XFX which is like the OC model to other Manufacturers.......I think.
TheSadFlute
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TheSadFlute
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DyingHeart
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CaseMouseMouse PadAudio
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CPUMotherboardGraphicsRAM
Phenom II X4 965BE  Sapphire 790X Zotac GTX650  4GB Corsair 1066 DDR2 (1GBx4) 
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G.Skill Phoenix Pro 120GB WD 2TB Green Stock 3x120mm UQ fans 
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post #6 of 6
Also, OCing disables the boost function, making the premium for ghz edition pointless.
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