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Why is the 980X so expensive still? - Page 7

post #61 of 68
Quote:
You learn something new every day... Do you have a source for this? I'd like to read more on it.

I'm sure it has been written about somewhere in the public domain (since you could see the fuses if you were looking hard enough), but I can't find a source on google with some quick checking. It's probably in the past parts were actually laser defeatured to prevent overriding fuse/eeprom bits. No idea what AMD was doing that allowed mobos to re-enable the 4th core on 3 core chips. Probably passing out the fuse read values through to the chipset and then the bios was making a decision on what cores to use.

EDIT: I think "Polycrystalline silicon fuses" is what the technical name is, for further research
Edited by dr/owned - 4/10/13 at 11:26am
post #62 of 68
Electronics IC industry has always been relying on blowing silicon die fuses (I forgot what they are made of but surely Vincent Himpe knows, he lives in Silicon Valley tongue.gif) to disable features
Stuff was only lasered off if blowing fuses was not enough (Blown fuses can sometimes be reactivated or revived by some means)
In microcontrollers certain features like BOR (Brownout reset) is set by blowing fuses from the programmer
As for AMD on Deneb/Thuban that was a puzzling one biggrin.gif

I understand why both AMD and Intel wants to blow fuses on their desktop parts. ( Or any semiconductor manufacturer for that matter )
CAD Design software for microchips is very expensive. They go for probably about a million bucks a year rented if i'm not wrong tongue.gif and the only ones doing it is i think Cadence Synopsys and Mentor Graphics (I really hate their CAD software)
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post #63 of 68
^^ There are/were some 8 bit PIC's that you could hit with UV light at an angle that would reset the cells which controlled code protection (at an angle, because Microchip did put a shield on top of them to block light, but not enough of a shield).

Found the article: http://www.bunniestudios.com/blog/?page_id=40
Edited by dr/owned - 4/10/13 at 12:25pm
post #64 of 68
Quote:
Originally Posted by dr/owned View Post

^^ There are/were some 8 bit PIC's that you could hit with UV light at an angle that would reset the cells which controlled code protection (at an angle, because Microchip did put a shield on top of them to block light, but not enough of a shield).

Found the article: http://www.bunniestudios.com/blog/?page_id=40
Those are EPROM programmed PICs
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post #65 of 68
Thread Starter 
Lots of great info added. Thank you mods
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post #66 of 68
Yes, thank you everyone for all the really articulated information in this thread. Brought back some memories of why I came to this website. Hopefully after I finish my school for Network Administration I can build a PC in the name of the community

Its really too bad we cant give mods rep points sometimes lol
    
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post #67 of 68
Quote:
Originally Posted by xxbassplayerxx View Post

The reason your "proof" shows higher scores for the QX9650 over the Q9650 is largely because of the nature of the benchmark and the demographic that purchases each chip. First, you linked a benchmark that is largely more dependent on a GPU than a CPU, especially if the CPU's are within the same microarchitecture. The QX9650 released at $1,060 whereas the Q9650 released at $340. A user spending over $1K on a processor is much more likely to purchase higher end graphics solutions than a user spending just under $350.

The screenshot I posted refers to CPU PERFORMANCE only.

For your guidance, the 3D mark score is made out of two (2) parameters, one is CPU score and the other is GPU score. The graph I posted refers to CPU score only. So much for your argument.
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post #68 of 68
Quote:
Originally Posted by Arxontas View Post

The screenshot I posted refers to CPU PERFORMANCE only.

For your guidance, the 3D mark score is made out of two (2) parameters, one is CPU score and the other is GPU score. The graph I posted refers to CPU score only. So much for your argument.

I am very familiar with how 3DMark scores are determined. However, the graph you posted says nothing but "3DMark Score", which is usually representative of the combination of both scores. Additionally, in most cases it is much more sensitive to number and model of graphics cards than CPU frequency between the same models. If the numbers on that graph indeed represent only the CPU score, you've still proved nothing beyond the demographic that purchases those chips is more likely to overclock. There is nothing in that chart about operating frequencies.

Further, actual proof:

WPrime 32M - Short, Threaded Test
QX9650 @ 4000MHz - 9.625s | Best Air Submission: QX9650 @ 4653MHz - 8.330s (All air cooled QX9650 Results)
Q9650 @ 4005MHz - 9.620s | Best Air Submission: Q9650 @ 4806MHz - 7.970s (All air cooled Q9650 Results)
0.052% Difference | 4.42% Difference

WPrime 1024M - Long, Threaded Test
QX9650 @ 4000MHz - 309.265s | Best Air Submission: QX9650 @ 4454MHz - 263.20s (All air cooled QX9650 Results)
Q9650 @ 4005MHz - 306.820s | Best Air Submission: Q9650 @ 4725MHz - 258.383s (All air cooled Q9650 Results)
0.794% Difference | 1.85% Difference

3DMark Vantage CPU Score - Long, Threaded Test
QX9650 @ 4000MHz - 16325 | All air cooled QX9650 Results
Q9650 @ 4005MHz - 16081 | All air cooled Q9650 Results
1.51% Difference

(Best air results not provided for Vantage because it is more dependent on GPU than CPU and score is sorted by overall score)

There are always improvements to be made in efficiency of the benchmarks, which explains the small % difference when at the same clocks. I have no idea where you got your idea that the QX9650 performs better because it's an Extreme Edition, but it's completely false. The only thing that actual numbers show is that the Q9650 overclocks higher on air (most likely due to the C0 to E0 revision change) and that at the same clockspeeds, they perform the same (within margin of error).
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