• Guest, The rules for the P & N subforum have been updated to prohibit "ad hominem" or personal attacks against other posters. See the full details in the post "Politics and News Rules & Guidelines."
  • Recovering from Halloween? Take part in our Spooky Giveaway to be in with a chance of replenishing your wardrobe. A simple riddle stands in your way. Visit the sweeptake thread over here.

Anyone have a 7920X yet?

IndyColtsFan

Lifer
Sep 22, 2007
33,269
458
126
i saw the 7920X was in stock and was wondering if anyone bought one or had seen any reviews yet, other than the article where it was delidded.
 

aigomorla

Cases and Cooling Mod PC Gaming Mod Elite Member
Super Moderator
Sep 28, 2005
17,437
589
126
7920 is a stupid cpu... really...

Everyone is waiting for the 2 bigger sisters which are suposed to come out.

But cost / usefulness the 7920 isnt much better then a 7900, unless you ABSOLUTELY need those 2 extra cores.
 
Mar 10, 2006
11,719
1,999
126
7920 is a stupid cpu... really...

Everyone is waiting for the 2 bigger sisters which are suposed to come out.

But cost / usefulness the 7920 isnt much better then a 7900, unless you ABSOLUTELY need those 2 extra cores.
Yep, I predict the middle 12, 14, 16 core parts won't be popular. Either people will go with the 10 core part or the big daddy 18 core part.
 

Timmah!

Senior member
Jul 24, 2010
734
62
91
7920 is a stupid cpu... really...

Everyone is waiting for the 2 bigger sisters which are suposed to come out.

But cost / usefulness the 7920 isnt much better then a 7900, unless you ABSOLUTELY need those 2 extra cores.
You could say the same about any other CPU from the line-up. Cost / usefulness of the 7980xe isnt much better then a 7960, unless you ABSOLUTELY need those 2 extra cores.

There you go and tell me its not true.
 
Mar 10, 2006
11,719
1,999
126
You could say the same about any other CPU from the line-up. Cost / usefulness the 7980xe isnt much better then a 7960, unless you ABSOLUTELY need those 2 extra cores. There you go and tell me its not true.
Proof by induction :)

If we assume as true that a CPU with K+2 cores is indistinguishable from a CPU with K cores, then:

(K+1) + 2 = (K+1)
K+3 = K+1
K+2 = K.

By this logic, any CPU with two additional cores than another CPU is indistinguishable from a CPU without those two additional cores.

Single core CPUs FTW!!!

You can avoid that last bit about CPU cores if you assume K >= 10, but at that point, one is just doing mental gymnastics :p

But in all seriousness, get a 10 core or get one of the 14+ core parts...the 12 core one is just a weirdo.
 
  • Like
Reactions: lightmanek

Timmah!

Senior member
Jul 24, 2010
734
62
91
Yep, I predict the middle 12, 14, 16 core parts won't be popular. Either people will go with the 10 core part or the big daddy 18 core part.
If be "people" you mean strictly hardware enthusiasts, who buy high-end hardware as their hobby, not because they really need it, you are probably right. Because obviously 7980xe is the best of the best, and 7900x is probably capable of highest clocks, while not having less cores than last year´s high end. And full fat chip on top of that.

However among the people, who can use all those cores for work, but for whichever reason they dont want to pay 2000 for 7980xe (or they simply cant afford it), those middle-core parts will find their buyers.
 
  • Like
Reactions: Arachnotronic

eddman

Senior member
Dec 28, 2010
232
79
101
Power hungry, overpriced, and mayonnaise TIM.. no surprise there is little interest.
Maybe it has something to do with it being made from worst HCC dies vs. 7900X made from the best LCC dies, presumably.

7940 and up would probably be much better.
 

Timmah!

Senior member
Jul 24, 2010
734
62
91
Proof by induction :)

If we assume as true that a CPU with K+2 cores is indistinguishable from a CPU with K cores, then:

(K+1) + 2 = (K+1)
K+3 = K+1
K+2 = K.

By this logic, any CPU with two additional cores than another CPU is indistinguishable from a CPU without those two additional cores.

Single core CPUs FTW!!!

You can avoid that last bit about CPU cores if you assume K >= 10, but at that point, one is just doing mental gymnastics :p

But in all seriousness, get a 10 core or get one of the 14+ core parts...the 12 core one is just a weirdo.

You cant really reduce this by some mathematical formula. I would prefer 7940x or 7960x over 7920x too, but saying its not really better than 7900x is just silly :) no offense

And while i guess you would certainly see a difference between 1-core and 3-core CPU, 10/12 and 16/18 are pretty similar ratios and if anything, you would see slightly bigger difference between 12 and 10, than between 18 and 16 (assuming same clocks).
 

Bouowmx

Senior member
Nov 13, 2016
916
336
116
Intel Core i9-7940X: same 100 USD/core as 7900 and 7920.

So I think the "smart" products are i7-7820X, i9-7940X, and 7980XE (by virtue of being the best).
 
  • Like
Reactions: IEC
Mar 10, 2006
11,719
1,999
126
You cant really reduce this by some mathematical formula. I would prefer 7940x or 7960x over 7920x too, but saying its not really better than 7900x is just silly :) no offense

And while i guess you would certainly see a difference between 1-core and 3-core CPU, 10/12 and 16/18 are pretty similar ratios and if anything, you would see slightly bigger difference between 12 and 10, than between 18 and 16 (assuming same clocks).
Oh, my post was highly tongue-in-cheek. For entertainment purposes only!
 
  • Like
Reactions: Timmah!

pantsaregood

Senior member
Feb 13, 2011
993
37
91
Proof by induction :)

If we assume as true that a CPU with K+2 cores is indistinguishable from a CPU with K cores, then:

(K+1) + 2 = (K+1)
K+3 = K+1
K+2 = K.

By this logic, any CPU with two additional cores than another CPU is indistinguishable from a CPU without those two additional cores.

Single core CPUs FTW!!!

You can avoid that last bit about CPU cores if you assume K >= 10, but at that point, one is just doing mental gymnastics :p

But in all seriousness, get a 10 core or get one of the 14+ core parts...the 12 core one is just a weirdo.
Almost, but not quite. We have failed to demonstrate a base case, so we can't really make use of this attempt at proof.

Perhaps we should attempt proof by contradiction?

Assume 12 cores are indistinguishable from 10 cores. This implies that $1199 = $999, which implies that 199 = 0. This is a contradiction, therefore our initial assumption must be flawed.

Q.E.D.

The only issue is that I proved the negation of what you were attempting to prove.
 
  • Like
Reactions: Timmah!

Timmah!

Senior member
Jul 24, 2010
734
62
91
Oh, my post was highly tongue-in-cheek. For entertainment purposes only!
Ok :-D My humor detector failed me. Damn interwebz!

2 more weeks for the big boys to show up! I cant wait. Still undecided on the motherboard. Taichi would be my choice, as it seems to get nothing but praise, but for whatever reason it has only single 8-pin - despite apparently having great power cascade and even more or less acceptable VRM heatsink. Bottom line, although i am looking only at slight overclock, i fear in case of 14-core chip single 8-pin might not be enough even then....

So it seems ultimately i will have to decide between the triplet of Asus boards (Strix, Prime-A or TUF1) or MSI Pro Carbon AC.

There always needs to be some "but" i guess.
 
Last edited:
Mar 10, 2006
11,719
1,999
126
Almost, but not quite. We have failed to demonstrate a base case, so we can't really make use of this attempt at proof.

Perhaps we should attempt proof by contradiction?

Assume 12 cores are indistinguishable from 10 cores. This implies that $1199 = $999, which implies that 199 = 0. This is a contradiction, therefore our initial assumption must be flawed.

Q.E.D.

The only issue is that I proved the negation of what you were attempting to prove.
The base case would be 7900X is indistinguishable from 7920X :p
 

pantsaregood

Senior member
Feb 13, 2011
993
37
91
The base case would be 7900X is indistinguishable from 7920X :p
Correct, but are we simply accepting that the base case is true? Is there a reason we are considering 7900X vs. 7920X rather than 7800X/7820X? Or maybe 7740X/7800X?

If we really push it, we may be able to prove 28 cores = 0 cores by induction!
 

Bouowmx

Senior member
Nov 13, 2016
916
336
116
Ok :-D My humor detector failed me. Damn interwebz!

2 more weeks for the big boys to show up! I cant wait. Still undecided on the motherboard. Taichi would be my choice, as it seems to get nothing but praise, but for whatever reason it has only single 8-pin - despite apparently having great power cascade and even more or less acceptable VRM heatsink. Bottom line, although i am looking only at slight overclock, i fear in case of 14-core chip single 8-pin might not be enough even then....

So it seems ultimately i will have to decide between the triplet of Asus boards (Strix, Prime-A or TUF1) or MSI Pro Carbon AC.

There always needs to be some "but" i guess.
ASRock X299 OC Formula product page went up: http://www.asrock.com/mb/Intel/X299 OC Formula/index.asp

8+4-pin, 1 DIMM/channel for memory frequency optimization, 4-way CF/SLI.
 
  • Like
Reactions: Timmah!
Mar 10, 2006
11,719
1,999
126
Correct, but are we simply accepting that the base case is true? Is there a reason we are considering 7900X vs. 7920X rather than 7800X/7820X? Or maybe 7740X/7800X?

If we really push it, we may be able to prove 28 cores = 0 cores by induction!
The point of my "proof" was to show how absurd it is to say that an incremental two cores doesn't matter, because by that logic, any number of incremental cores doesn't matter because it's always two more than some previous value.
 

ASK THE COMMUNITY