AMD FX-8770 and 9000 - 220W TDP, 5 GHz

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galego

Golden Member
Apr 10, 2013
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That is completely false. NO BODY has a stable 8350 5.0 GHZX overclock on air. ALL are using liquid coolers to obtain 5.0 GHZ stable. I repeat the word stable. You may boot at 5.0 GHZ in exceptional circumstances on air. You would NEVER be able to successfully complete any serious benchmarks or stress tests on air at that frequency. You are doing a disservice to spread such false information. I am registered on overclock.net and techpowerup.comboth in the Vishera Owners club. I know from both personal experience and reading thousands of posts that you are not being truthful.

First of all, please say me where you did read the word stable in my post. Next, say me why you are focusing on that whereas avoiding the main part of my post, which was about mobos.


One thing is for sure: 4.8/5Ghz "stock" Vishera even with that big TDP rating should be faster than 4770K in many workloads. ST is still not going to be AMD's domain but it will bridge the gap somewhat. Brute force 20% performance increase FTW LoL . I wonder whether they will bundle some serious WC kits with these things, Performance might be there but cooling this thing (and VRMs on these boards!) is going to be a challenge I bet!

As shown here at AT, using openbenchmarks the FX-8350 was a 10% behind the i7-3770k in average.

The i7-4770k is about a 8% faster than the 3770k. A 20% increase in performance would put the FX-9000 on pair with the 4770k.
 

Plimogz

Senior member
Oct 3, 2009
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Oh come on. One must infer stability for your post to make sense. Otherwise, what's the point of saying that people are already running 5GHz? Hell, at that point I'm sure that some people could be said to be running @ 5.5GHz or 6Ghz (*Using 1.8V, LN2 and only long enough to suicide run to a CPU-Z screenshot -- in other words: Useless)

And in order to attain any kind of reasonable stability @ 5GHz, (stability being a key word, despite it's conspicuous absence from your post) both temperature and voltage need to be addressed. os2wiz already pointed out the bit about cooling which you glossed over in your post. And as for voltage -- this is where the stability bit needed to be inferred -- it'll impact TDP exponentially and power draw, and hence what's needed in a motherboard. And once you take leakage into account, all three variables (i.e. cooling, vcore, TDP) will co-vary.

There's just no point in mentioning those boards out there already running vishera @5GHz unless you imply stability (and the higher Vcore needed) in those overclocks. Who needs a board that won't run your stock FX-Centurion stably, but at least won't blow up so long as you don't push the needed volts to make it stable?
 

galego

Golden Member
Apr 10, 2013
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Oh come on. One must infer stability for your post to make sense. Otherwise, what's the point of saying that people are already running 5GHz? Hell, at that point I'm sure that some people could be said to be running @ 5.5GHz or 6Ghz (*Using 1.8V, LN2 and only long enough to suicide run to a CPU-Z screenshot -- in other words: Useless)

And in order to attain any kind of reasonable stability @ 5GHz, (stability being a key word, despite it's conspicuous absence from your post) both temperature and voltage need to be addressed. os2wiz already pointed out the bit about cooling which you glossed over in your post. And as for voltage -- this is where the stability bit needed to be inferred -- it'll impact TDP exponentially and power draw, and hence what's needed in a motherboard. And once you take leakage into account, all three variables (i.e. cooling, vcore, TDP) will co-vary.

There's just no point in mentioning those boards out there already running vishera @5GHz unless you imply stability (and the higher Vcore needed) in those overclocks. Who needs a board that won't run your stock FX-Centurion stably, but at least won't blow up so long as you don't push the needed volts to make it stable?

Therefore you missed my point entirely. My point was that you don't need a super-innovative technology to design a mobo for those new chips (as someone believed), because the technology is available (some current mobos with minor design teawk will work). And you also avoid the part of my post where I wrote:

Maybe a series of Centurion-certified mobos could be released with those chips.

After I wrote that another poster leaked a new mobo certified for 5GHz centurion chip.
 

Plimogz

Senior member
Oct 3, 2009
678
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I really don't know how you could think that I missed your point entirely given my post basically stating that exact same thing. A post which you quoted in your reply, btw.

Now, if you don't think that the gist of what I said and what you said pretty much amount to the same, I won't argue semantics with you.
 

inf64

Diamond Member
Mar 11, 2011
3,765
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If only AMD had access to 22nm node from intel. These clocks would probably be achievable within 125W spec.
 

ShintaiDK

Lifer
Apr 22, 2012
20,378
145
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If only AMD had access to 22nm node from intel. These clocks would probably be achievable within 125W spec.

Very unlikely to put it mildly. FX8350 is already 140W+ Plus we already saw from IDC how things scale with 32nm vs 22nm.
 

ShintaiDK

Lifer
Apr 22, 2012
20,378
145
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Nope. It is not 140W+.

Asrock, MSI and IDC dont agree with you there. So sorry to dissapoint you.

Example:
Originally Posted by MSI
According to RD engineers from our HQ,

1. AMD has claimed that the FX-8350 to be 125W. However, during our internal testing, when the usage of CPU reaches 100% through Prime 95 for a while, the power consumption can exceed 125W and reaches 140W. With such condition on the 970A-G46, the high amount of power draw also causes the MOSFET to exceed its spec and will overheat.

Thus, to prevent such any potential hazard to the MOSFET, 970A-G46’s BIOS will trick the processor that its temperature is 225 degrees which will then allow the CPU to throttle. This is aimed to make the system stable in this condition.

2. We had tested using 3DMark and it did not cause throttling. Throttling only happens when the loading on a 125W CPU usage is heavy by the use of heavy burn-in tools such as Prime 95/OCCT, and such testing methods are not standard usage scenario or practical.

Please also keep in mind that this throttling behavior keeps system stable under such heavy-loading condition.

This is more of AMD’s issue on the FX-8350 because the TDP was rated lower than its actual value.
 

inf64

Diamond Member
Mar 11, 2011
3,765
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I think the point is that AMD is targeting this thing at OCers. If you were to OC 8350 to 4.8/5Ghz with good cooling, in all likelihood you would hit similar power draw. So this way you don't need to thinker with anything, you just plug it in the supporting board (that can take it and survive without burning up ) , you turn the PC on and you are good to go. Plus I suppose these parts have at least a 5% headroom left so people will probably go overboard trying to eek out every last % of clock.

Now this is all nice and dandy for OCers, but boards have to be able to survive such a chip under full load. As Stilt at XS notices, these parts just have to be super cherry picked samples that actually cannot draw more than 180W under load. If they were drawing more than 180W there is no board commercially available that can handle the current levels and VRMs would likely burn up. We have to wait and see the real spec, how much this thing exactly pulls from socket and what boards will support it.
 
Aug 11, 2008
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I think the point is that AMD is targeting this thing at OCers. If you were to OC 8350 to 4.8/5Ghz with good cooling, in all likelihood you would hit similar power draw. So this way you don't need to thinker with anything, you just plug it in the supporting board (that can take it and survive without burning up ) , you turn the PC on and you are good to go. Plus I suppose these parts have at least a 5% headroom left so people will probably go overboard trying to eek out every last % of clock.

Now this is all nice and dandy for OCers, but boards have to be able to survive such a chip under full load. As Stilt at XS notices, these parts just have to be super cherry picked samples that actually cannot draw more than 180W under load. If they were drawing more than 180W there is no board commercially available that can handle the current levels and VRMs would likely burn up. We have to wait and see the real spec, how much this thing exactly pulls from socket and what boards will support it.

Price is key also. If it is around 250.00 it might be a viable alternative for certain scenarios. I thought however in the earlier thread about this the price was rumored to be 700.00.

If the price is close to 3970k, it makes no sense at all, except for someone who is a total AMD diehard fan. If it is close to 4770k, I could see a market for it.
 

inf64

Diamond Member
Mar 11, 2011
3,765
4,223
136
Price is key also. If it is around 250.00 it might be a viable alternative for certain scenarios. I thought however in the earlier thread about this the price was rumored to be 700.00.

If the price is close to 3970k, it makes no sense at all, except for someone who is a total AMD diehard fan. If it is close to 4770k, I could see a market for it.
That's correct. I'd go even further and say that price needs to be lower than 4770K, somewhere in between 4670K and 4770K (closer to the latter).
 

AtenRa

Lifer
Feb 2, 2009
14,003
3,361
136
I could see a 150W TDP CPU (Close to or equal to 5GHz) but not 220W.
 

Erenhardt

Diamond Member
Dec 1, 2012
3,251
105
101
Now this is all nice and dandy for OCers, but boards have to be able to survive such a chip under full load. As Stilt at XS notices, these parts just have to be super cherry picked samples that actually cannot draw more than 180W under load. If they were drawing more than 180W there is no board commercially available that can handle the current levels and VRMs would likely burn up. We have to wait and see the real spec, how much this thing exactly pulls from socket and what boards will support it.

Really? My cheap AM3+ MSI board with no MOSFET cooling is rated at 140W CPU. Putting any heatsink on it should give at least 25% more headroom.
 

inf64

Diamond Member
Mar 11, 2011
3,765
4,223
136
I wouldn't put 140W specced CPU in such a board if I were in your shoes .
 

Gikaseixas

Platinum Member
Jul 1, 2004
2,836
218
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150W cpu is not impossible given Vishera appetite for watts but i bet as soon as you touch the voltage on such a chip the numbers would explode. If AMD is serious about releasing it they better increase performance at similar rates
 

colonelciller

Senior member
Sep 29, 2012
915
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What I don't believe is that AMD would bother to do something like that given that the marketshare for such a CPU would surely be extremely limited in terms of total units the market would absorb globally on an annual basis.

the same reason that Honda & ford have/continue to build supercars... "top dog" marketing prowess



 
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