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Gigabyte X58A-OC vs. Gigabyte X58A-UD7 - Page 12

post #111 of 135
So you managed to get two sets of 1333 MGH-E Hypers... that's pretty sweet... means you didn't pay the Hyper price for them (still not 8-7-8, though).

Regardless, the claim about 87 TDP is ridiculous. The 950 is a 130W TDP chip, and that's at 3.06GHz. Kick that up to almost 4.2GHz and you're looking at closer to 200W.
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post #112 of 135
Thread Starter 
Quote:
Originally Posted by xxbassplayerxx View Post
So you managed to get two sets of 1333 MGH-E Hypers... that's pretty sweet... means you didn't pay the Hyper price for them (still not 8-7-8, though).

Regardless, the claim about 87 TDP is ridiculous. The 950 is a 130W TDP chip, and that's at 3.06GHz. Kick that up to almost 4.2GHz and you're looking at closer to 200W.
Actually it is 1066 Kingston Hyper X 12 GB
And they are 6x2GB Dimms
Here picture of my older rig but with the same RAM:

Also I have screens of 8-7-8-20-1 also but I couldn´t find my USB stick.

And yes I am telling you the truth on the UD7 my 4.1 GHZ I had a very low TDP of approxmiately 90-87 TDP.
I will buy the board shortly anyway ..then I can show you some screens
Or if you really don´t believe me I can get my buddy to bring his UD7 again^^

I have consulted Gigabyte and Intel about this unusal Vcore requirements and TDP´s both say the other one is responsible.

Gigabyte claims that not every Intel chip is identical which is of course true , there can be fluctuations of performance or stability or acceptance of higher clocks because these events are residing in the error relevance.

Intel says it is the doing of Gigabyte and that the UD5´s core building and structure is responsible for the full exhaustion of the chips ability and performance.

I am not sure of either and I think it is a little of both.
But I have always been able to run my 950 at very low Vcore and TDP´s
Frankly I managed to cool it at 34C Idle and 45C Load in summer with a simple Noctua UD12 because of the low heat development which was reduced by the low TDP

I am sure there are lot´s of people out there with those results

But I personally think it is a little more Gigabytes fault because I am also able to clock 1066 Memory to 1950 and 2000MHZ + with very low timings 8-8-8-20-1 as you have seen with a Vdimm of 1.50 with absolutely no problems.
And additionally it is 12 GB which normally doesn´t clock well at all.
So I am not sure I may be just lucky^^

And look at the screen I have posted all over ...I am running 4.1 GHZ now and seeing 130W of TDP...200Watt not even closely in sight
Edited by Kung Pow - 5/6/11 at 12:53am
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post #113 of 135
It sounds like you dont understand TDP...

Overclocked TDP = stock TDP * (OC freq/Stock freq) * (vOC/vStock)^2
130 * (4100/3060) * (1.14/1.10)^2 = ~187W

Whatever reading you're getting is wrong.

Also, memory clocks have almost nothing to do with the motherboard. That's almost 100% reliant on which IC's the memory uses. For example, your sticks clock so well because they Elpida MGH-E Hypers, not because of either board. I knew this because Hypers are the only IC's that can do ~2000 8-8-8 with 1.65V or less.
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post #114 of 135
Thread Starter 
Quote:
Originally Posted by xxbassplayerxx View Post
It sounds like you dont understand TDP...

Overclocked TDP = stock TDP * (OC freq/Stock freq) * (vOC/vStock)^2
130 * (4100/3060) * (1.14/1.10)^2 = ~187W

Whatever reading you're getting is wrong.

Also, memory clocks have almost nothing to do with the motherboard. That's almost 100% reliant on which IC's the memory uses. For example, your sticks clock so well because they Elpida MGH-E Hypers, not because of either board. I knew this because Hypers are the only IC's that can do ~2000 8-8-8 with 1.65V or less.
I know how TDP is established.
Still the readings came from CPU Z and the cooling ability proves the readings were correct.
With a Noctua UD12 in summer 45C at full load with a 4 GHZ 950?
That can only happen if there is onl a little amount of Watts creating heat to dissipate.
I am telling you man I really get those values.

As in terms of Memory.
12 GB of RAM is normally a reeeeal pain to overclock and it impedes the CPU overclock as well.
In my case that is even 1066 stock Memory and 12 GB of it ergo ...XMP disabled.

That is normally unclockable but in my case I get 2000MHZ + easily with 1.50 Vdimm and 8-8-8-20-1 ?
That has something to do with the motherboard => Memory Controller.
Also considering the still good CPU oc with very little Vcore ..again =>Motherboard.

That is why I think the employees at Gigabyte giving me the information about the OC is becoming more and more relevant.
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post #115 of 135
CPU-Z is often wrong. From displaying incorrect voltages for certain chips to always being off on voltages. If you measure vcore with a DMM you will most certainly get a different value.

Also, I hate to burst your bubble, but the memory controller hasn't been on the motherboard since socket 775. Newer Intel chips (your 950 included) have an IMC (integrated memory controller). This is part of the Uncore (QPI/VTT voltages control this).

CPU temperatures are often a factor of the "leakage" of the chip. Heat out of the chip is a loss of energy. A cooler chip is a more efficient, lower leakage chip.

This means the fact that you're getting high memory speeds with low voltages has nothing to do with the motherboard but is, in fact, a result of your strong memory IC's and IMC.

Basically, you have a great CPU and memory. The motherboard, however, has little to nothing to do with these results.
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post #116 of 135
Thread Starter 
Quote:
Originally Posted by xxbassplayerxx View Post
CPU-Z is often wrong. From displaying incorrect voltages for certain chips to always being off on voltages. If you measure vcore with a DMM you will most certainly get a different value.

Also, I hate to burst your bubble, but the memory controller hasn't been on the motherboard since socket 775. Newer Intel chips (your 950 included) have an IMC (integrated memory controller). This is part of the Uncore (QPI/VTT voltages control this).

CPU temperatures are often a factor of the "leakage" of the chip. Heat out of the chip is a loss of energy. A cooler chip is a more efficient, lower leakage chip.

This means the fact that you're getting high memory speeds with low voltages has nothing to do with the motherboard but is, in fact, a result of your strong memory IC's and IMC.

Basically, you have a great CPU and memory. The motherboard, however, has little to nothing to do with these results.
Ok I give up obviously I am not as knowledgeable as you considering this matter
Let´s see if you have better taste too^^

Here a dying thread of mine which is still unsolved.
http://www.overclock.net/water-cooli...tion-help.html

It is bascially about my Little Devil V8 and my absolute inability to find fitting and good looking fans for it to go with my Hardware/Watercooling theme.

I have narrowed it down to two choices now and just need some ending advice on the matter, maybe you can help
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post #117 of 135
Bassplayer got it pretty much right, but to be even more accurate you gotta take into account thermal capacitance and current ratings which are hard to measure. Yes a linear increase in frequency should result in a linear increase in current, but in reality its not that simple as voltage doesn't increase linearly and neither does current. Thermal capacitance of the cpu itself as well as efficiency also need to be taken into consideration.

The best and easiest way to actually know how much your CPU is pulling is by buying a current meter built to measure the 12v inputs to the CPU. Then you can see how much wattage and current is being pulled, THEN you got fin the specs on your MOSFETs on your CPU powersupply on the board and find their rated efficiency at that certain current output divide by the number of phases, and you then multiply the input wattage by the efficiency, and you finally have a rough estimate of input power to the CPU.

The proper equation is this: P=aCV^2f, A=the activity factor which for a CPu at full load =1 since all of its transistor gates are on.


you should be aware that TDP is thermal output, and for intel its only 80% of the true thermal output, but that shoudl help deal with the efficiency of the CPU itself.

Anyways there is nothing odd about your CPU. You just got a nice piece of silicon.


The bottom line is that the X58A-OC has better motherboard power supplies to every aspect of the board. Your required voltages would decrease, the board will run cooler, and finally be more efficient. X58A-OC also has more current output than the UD7 rev 2.0.
Edited by Sin0822 - 5/6/11 at 12:29pm
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post #118 of 135
Thread Starter 
Power delivery has nothing to do with performance or stability though.
The OC is a great board and so is the UD7.
A direct comparison in terms of overclocking ability doesn´t make sense since both boards are more than capable of achieving brilliant results.
The OC may have more features to make overclocking more conveniant for both the CPU and User but the end result will not differ from a UD7.

Only in the Nitro 5.2+ GHZ with 1.85 Vcore areas can you see the 5% higher efficiency of the OC but since almost nobody uses or does it ..that fact is irrelevant and draws this comparision at once.
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post #119 of 135
no dude, voltage regulation has everything to do with stability. it also has to do with how high your CPU can OC, and while you wont be limited by the UD7, the OC can give you more potential by allowing a lower vcore to be used thus saving you room with heat. LLC will really determine how much voltage you use and how high your temps will be.

Its cool tho, but i wouldn't side grade from a UD5 to a UD7, id do it to the OC board tho. I have owned a lot of GB boards, and to be honest the X58A-OC is one that i would buy two of.

No phase change, dry ice, LN2, i even saw results on air as did others, OCing ability is all in the hands of the OCer, and when you really know how to OC you will know how to take advantage of the many features the OC board has to offer. Yuo can OC the same with the UD7 rev 2.0 as you can with the G1.assassin and UD5 rev 2.0 as electronically they have the same OCing ability in terms of power delivery to the different components. The max BLCK of those boards will vary, but my G1 Assassin can do 232blck on air.
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post #120 of 135
As long as the board delivers stable clean power delivery with no ripple or high/low spikes, your OC will be solid, if not higher. You need both high current and stable voltage for extreme OC to work. Simple as that.
Edited by ezveedub - 5/10/11 at 7:02am
     
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