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HD 4890X2 @ 1000MHz?

Since a single HD4890 doesn't go to 1GHz even in OC versions (although it can OC that far), I find it somewhat dubious that they would be able to get an X2 to that sort of clockspeed unless they are hugely cherry picking chips since it'll be a low production model, and only using the best of the best for it (and they've been saving up since production started).
 
A lot of speculation there from the source article:


"Radeon HD 4890X2 part, especially since there are reports indicating that partners could release dual-1GHz clocked cards"


I'm doubting they are going to combine two 4890s into 1 card and then clock it 150mhz higher than the standard 4890 without some shrinking involved. That would also be 100mhz faster than the the fastest overclocked card I can see on Newegg right now.


If they can get 2 of them to operate at that frequency, why wouldnt they release the single 4890s at higher clocks?


If it is going to be some special edition from a partner that is 1ghz, then you are saying that may beat a stock 295....meh. You can OC those as well.
 
Given even most review sites weren't able to replicate early "1 GHz on air" OC'ing results with the 4890, I'd say this is highly unlikely, especially on an X2 part. Maybe in another 10 months and another respin they'll be able to refine the 55nm process enough to make it a reality, but I expect 40nm RV8x0 to be out by then.
 
Ye, from my own experience I can tell that 1000MHz isn't easy, but it is possible. At 950MHz it still be cool though.

Btw, afaik they will be overclocked HD4890's coming out that we haven't heard of yet. The slight OC models from xfx don't count.
 
If you click the link through tomshardware to the original article at softpedia.com there is a video of Sas Marinkovic discussing the 4890. He mentions again and again the overclocking head room and that partners can design their own cooling solutions. Listening to the interview, I had the impression that we haven't seen the overclocking limits these cards are capable of. Also, he didn't dismiss the X2 option. He talked about the potential of the card to scale. That sounds promising too. Taken together, it sounds credible that AMD would be looking at a OCed dual gpu solution.
 
Originally posted by: chizow
Given even most review sites weren't able to replicate early "1 GHz on air" OC'ing results with the 4890, I'd say this is highly unlikely, especially on an X2 part. Maybe in another 10 months and another respin they'll be able to refine the 55nm process enough to make it a reality, but I expect 40nm RV8x0 to be out by then.
Click to expand...

Unless AMD has been binning their 4890 chips and saving the best for future cards. The fact that some 4890s can hit 1GHz at stock voltage says that the possibility exists.
 
My XFX 4890 (non-OCed version) was able to hit 1GHz core and 1100MHz memory on stock cooling and voltage. It's been running stable for about a week now.
 
Sounds possible according to the overclocking summary by expreview
With a little bump in the core voltage, this might be possible. The only thing that would hold back this card is the power consumption figures. It would be way over the top! Would be a hardware enthusiasts dream though ot have one of these in your rig.
 
Originally posted by: Cookie Monster
Sounds possible according to the overclocking summary by expreview
With a little bump in the core voltage, this might be possible. The only thing that would hold back this card is the power consumption figures. It would be way over the top! Would be a hardware enthusiasts dream though ot have one of these in your rig.
Click to expand...

With a bump in voltage it would be LESS possible due to the extra power.
No matter what (IMO) a prospective 1GHz core would have to be achieved at the same voltage level as current core clocks of 850MHz to keep within a feasible power envelope.
 
Originally posted by: Lonyo
With a bump in voltage it would be LESS possible due to the extra power.
No matter what (IMO) a prospective 1GHz core would have to be achieved at the same voltage level as current core clocks of 850MHz to keep within a feasible power envelope.
Click to expand...

Knowing that the HD4890 uses quality components for its power supply section and the possibility of using an 8pin PCI-e connector instead of the stock 6 pin, 1GHz core clock is being very conservative. Its just the power consumption holding this card back.

 
I think the 4870 X2 is perhaps the sexiest card of all time. Spare the whacked stickers, I love the tough industrial look.

A 4890 X2 4GB would be a great (final) DX10 powerhouse for ATI. Not sure it's needed, but damn nice regardless!
 
Originally posted by: chizow
Given even most review sites weren't able to replicate early "1 GHz on air" OC'ing results with the 4890, I'd say this is highly unlikely, especially on an X2 part. Maybe in another 10 months and another respin they'll be able to refine the 55nm process enough to make it a reality, but I expect 40nm RV8x0 to be out by then.
Click to expand...

Yea, but didn't you say that they wouldn't be able to squeeze any more clock speed out of the 55nm process before the RV790 specs were known to the public? 😉

I agree with you here though... I can't see them doubling up the heat on one card by having two GPU's and then adding another 150MHz on top of that. It would be a pretty interesting part if they could do it and priced it nicely though.
 
They must have one hell of a trick up their sleeves if this is going to be a reality. The power consumption and heat output doesn't even look feasible, nevermind good.
 
Originally posted by: Creig
Originally posted by: chizow
Given even most review sites weren't able to replicate early "1 GHz on air" OC'ing results with the 4890, I'd say this is highly unlikely, especially on an X2 part. Maybe in another 10 months and another respin they'll be able to refine the 55nm process enough to make it a reality, but I expect 40nm RV8x0 to be out by then.
Click to expand...

Unless AMD has been binning their 4890 chips and saving the best for future cards. The fact that some 4890s can hit 1GHz at stock voltage says that the possibility exists.
Click to expand...

Links to 1ghz stable 4890s @ stock volts?
 
Originally posted by: OCguy
Originally posted by: Creig
Originally posted by: chizow
Given even most review sites weren't able to replicate early "1 GHz on air" OC'ing results with the 4890, I'd say this is highly unlikely, especially on an X2 part. Maybe in another 10 months and another respin they'll be able to refine the 55nm process enough to make it a reality, but I expect 40nm RV8x0 to be out by then.
Click to expand...

Unless AMD has been binning their 4890 chips and saving the best for future cards. The fact that some 4890s can hit 1GHz at stock voltage says that the possibility exists.
Click to expand...

Links to 1ghz stable 4890s @ stock volts?
Click to expand...

Heres one

Heres another

 
Originally posted by: Creig
Unless AMD has been binning their 4890 chips and saving the best for future cards. The fact that some 4890s can hit 1GHz at stock voltage says that the possibility exists.
Click to expand...
Again, highly doubtful given the rumors AMD is not planning a reference part and is leaving designs and execution to board partners (think 4850X2 level of design and execution). That means that AMD most likely is not binning any chips unless it was already doing so for highly overclocked versions, which would directly eat into supply for any potential overclocked parts. That, along with other concerns already mentioned such as total TDP, power draw, and the additional difficulties dissipating heat in an X2 package make the likelihood of a higher-than-stock-clocked X2 part optimistic at best. Historically this has never happened either, if anything the X2 parts are clocked the same or lower than the single-GPU parts they're derived from.

Originally posted by: SlowSpyder
Yea, but didn't you say that they wouldn't be able to squeeze any more clock speed out of the 55nm process before the RV790 specs were known to the public? 😉
Click to expand...
Nope, I questioned the expectations of a 30% increase in performance from a reported 13% increase in clockspeed. Looks like I was spot-on in that regard. 😉 I also said I thought it was highly unlikely RV770 on a 55nm process would be able to achieve both a clockspeed increase AND additional functional units from yields and clearly stated I thought 850MHz was achievable with a voltage increase. The respin to RV790 allowed for a bit more overhead but I think overall 4890 is as expected, a linear 13% increase in performance scaling with clockspeed increases.
 
Originally posted by: chizow
Originally posted by: Creig
Unless AMD has been binning their 4890 chips and saving the best for future cards. The fact that some 4890s can hit 1GHz at stock voltage says that the possibility exists.
Click to expand...
Again, highly doubtful given the rumors AMD is not planning a reference part and is leaving designs and execution to board partners (think 4850X2 level of design and execution). That means that AMD most likely is not binning any chips unless it was already doing so for highly overclocked versions, which would directly eat into supply for any potential overclocked parts. That, along with other concerns already mentioned such as total TDP, power draw, and the additional difficulties dissipating heat in an X2 package make the likelihood of a higher-than-stock-clocked X2 part optimistic at best. Historically this has never happened either, if anything the X2 parts are clocked the same or lower than the single-GPU parts they're derived from.
Click to expand...
It all depends on whether or not AMD wishes to support the efforts of their AIB partners in creating such a card. There's absolutely nothing stopping AMD from binning the chips themselves and selling them according to their OC potential.
 
Originally posted by: Creig
Originally posted by: OCguy
Links to 1ghz stable 4890s @ stock volts?
Click to expand...
I'm guessing you didn't see Red Storm's comment seven posts above yours.
Click to expand...

Ah, random anecdotal evidence. How can I be such an idiot?


Marc says it is possible, and I dont have that card, so I was genuinely asking for links to a review, or a AT thread where someone with a 4890 posted results.

Thanks Cookie, i'll take a look at those.
 
Originally posted by: OCguy
Originally posted by: Creig
Originally posted by: OCguy
Links to 1ghz stable 4890s @ stock volts?
Click to expand...
I'm guessing you didn't see Red Storm's comment seven posts above yours.
Click to expand...

Ah, random anecdotal evidence. How can I be such an idiot?


Marc says it is possible, and I dont have that card, so I was genuinely asking for links to a review, or a AT thread where someone with a 4890 posted results.

Thanks Cookie, i'll take a look at those.
Click to expand...

😕


This is an AT thread and somebody with a 4890 did post their results regarding a stock voltage 1GHz overclock.

 
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