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[Poll] Which 7970 ghz is best? - Page 4

Poll Results: Which 7970 ghz is best for price/perf and ocing ability

 
  • 5% (3)
    £330 - VTX3D HD 7970 GHZ X-Edition 3GB
  • 9% (5)
    £335 - 3GB XFX Radeon HD 7970 GHz DD Edition
  • 74% (41)
    £360 - 3GB Sapphire Radeon HD 7970 Vapor-X GHZ
  • 10% (6)
    £380 - Gigabyte 7970 GHz Edition Windforce 3X
55 Total Votes  
post #31 of 50
The Ghz editions use a Tahiti XT2 chip while the original HD7970's use the earlier Tahiti XT chip.

There are quite clear indications that the XT2 chip, while being more power friendly, overclocks a lot worse then the original XT chips.

http://www.xbitlabs.com/news/graphics/display/20120615235137_AMD_Preps_New_Revision_of_Tahiti_Chip_for_Improved_Radeon_HD_7970.html
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post #32 of 50
Thread Starter 
Hmm well you learn something new everyday, i thought the ghz cards were actually faster cards as apposed to just being factory clocked 7970s.

So, im looking for a good clocker, voltage unlocked, ref pcb for watercooling. Which 7970 should i look at now? tongue.gif
post #33 of 50
Any card with the stock AMD cooler? lol.

Just check if the card clocks in at less then 1Ghz stock. If it does, it uses the older chip as the XT2 chips have stock clocks of 1Ghz with 1.05Ghz boost.

Since you're from the UK I checked Scan for a second and the cheapest 100% reference one was the VTX3D.
http://www.scan.co.uk/products/3gb-vtx3d-radeon-hd-7970-1375mhz-gddr5-28nm-gpu-925mhz-2048-cores-mdport-dl-dvi-hdmi-pluscrossfire-o
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post #34 of 50
Thread Starter 
Are all ref 7970 clocked below 1ghz voltage unlocked?
post #35 of 50
Quote:
Originally Posted by IBYCFOTA View Post

I think what he's getting at is that the only significant difference between the GHz editions are the boosted stock clocks, that's it. It doesn't have anything to do with overclocking capabilities or whether a card is voltage locked.

That might be true, but most of all the good air cooling 7970's seem to be Ghz Editions. I would only recommend going reference if you plan to watercool ASAP, just because its a little easier to find reference GPU blocks rather than non. Also it seems just harder to find non Ghz Editions and I don't even think the price is THAT much higher to even worry about it really.
Quote:
Originally Posted by $ilent View Post

Are all ref 7970 clocked below 1ghz voltage unlocked?

Not always,this is a reference 7970 but is clocked at 1Ghz and has unlocked voltage. (Also yes this is a black edition, it might not have the DD cooler but the Part# links it as a black edition.)
Edited by Chucklez - 4/28/13 at 9:05am
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post #36 of 50
Thread Starter 
What about the Sapphire 7970?

Would this gpu be voltage unlocked and a good clocker?
post #37 of 50
Quote:
Originally Posted by Imprezzion View Post

The Ghz editions use a Tahiti XT2 chip while the original HD7970's use the earlier Tahiti XT chip.

There are quite clear indications that the XT2 chip, while being more power friendly, overclocks a lot worse then the original XT chips.

http://www.xbitlabs.com/news/graphics/display/20120615235137_AMD_Preps_New_Revision_of_Tahiti_Chip_for_Improved_Radeon_HD_7970.html

I'm doubtful the GHZ edition uses Tahiti XT2 as XT2 was designed for lower voltage.

7970 ghz run at 1.256 volts out of the box. That's more than the original 7970 did.
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post #38 of 50
Quote:
Originally Posted by SLK View Post

If you buy XFX then that would apply. MSI and Sapphire make excellent cards for AMD. I wouldn't trust an XFX running in a shed 100 feet from my house.

Please do tell why you wouldn't trust an XFX?

My XFX DD ghz model is sitting at 1200/1600 at 1.18v on stock DD air cooling in a cramped case with meh airflow.... Can push higher but have no need to - besides air can only go so far for 24/7 use.

However - I've got no personal experience with other ones. I will admit, it can get toasty (but well within spec) so the fans aren't exactly quite. I've heard Sapphire seems to be the number one choice, round here atleast.
Edited by SoloCamo - 4/28/13 at 4:37pm
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post #39 of 50
As some others have stated, the Sapphire uses a non-reference pcb.



Mine was warped within two weeks. I've never had that happen before. My 8800gt, gtx260, 5850, gtx480, gtx580, gtx670 and Titan did nothing of the sort.
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post #40 of 50
Quote:
Originally Posted by $ilent View Post

What about the Sapphire 7970?

Would this gpu be voltage unlocked and a good clocker?

That's what I've been suggesting all along tongue.gif

Since I own it, yes, it's voltage unlocked and overclocks like crazy biggrin.gif
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