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6950x or 7900x

2K views 8 replies 7 participants last post by  MrfingerIII 
#1 ·
Hello everybody!

I just need a few second opinions if y'all don't mind. I am deciding between both of these CPUs for my work computers.

I can get either CPU for around $700 due to some discounts.

The CPUs will be used for rendering and modeling only! These PCs will run basically all day.

I am leaning towards the 7900x because of AVX-512 but I am hesitant due to the temperatures under load. I can't afford to have my CPUs melt my motherboards and then miss around a week or two of work.

Is there anybody who has any experience with these two CPUs? I would appreciate some help deciding.

Thanks!
 
#2 ·
Welcome to the forums!!!

My recommendation is neither. Get an AMD R7 1800x, get virtually the same performance, and save a lot of money.

There have been many issues associated with the X299 platform as of late. The big one is that the motherboards don't have sufficient cooling for the Voltage Regulation Modules. Ryzen's X370 platform does not have this issue, and is a great product for High-End uses.
 
#3 ·
Without recommending anything, I'll mention that Skylake X's heating and VRM problems only happen with higher overclocks when you push into the 4.5+ GHz range or with improperly set AVX and AVX512 settings.

By comparison, Ryzen's hit a wall around 4.0 GHz and therefore don't have these problems since you can't go higher anyway.

If the choice is between the 6950X and 7900X. They both reach similar clock speeds with the same thermal limits. But the 7900X has better IPC, has AVX512, and has more memory OC headroom.
 
#4 ·
Quote:
Originally Posted by Mad Pistol View Post

Welcome to the forums!!!

My recommendation is neither. Get an AMD R7 1800x, get virtually the same performance, and save a lot of money.

There have been many issues associated with the X299 platform as of late. The big one is that the motherboards don't have sufficient cooling for the Voltage Regulation Modules. Ryzen's X370 platform does not have this issue, and is a great product for High-End uses.
Hi! Thank you for the kind words. I was thinking about Threadripper down the line, even though it lacks AVX512. The 1800x is out of the question for me right now. The store where I purchase my components from doesn't have any in stock and won't get any in the next weeks; I exclusively buy from them.
I have heard about the motherboard issues, that kinda puts me off.

Quote:
Originally Posted by Mysticial View Post

Without recommending anything, I'll mention that Skylake X's heating and VRM problems only happen with higher overclocks when you push into the 4.5+ GHz range or with improperly set AVX and AVX512 settings.

By comparison, Ryzen's hit a wall around 4.0 GHz and therefore don't have these problems since you can't go higher anyway.

If the choice is between the 6950X and 7900X. They both reach similar clock speeds with the same thermal limits. But the 7900X has better IPC, has AVX512, and has more memory OC headroom.
Oh, I thought they happened regardless of overclocks. Thanks for the information. At the moment, I need one of them. I might switch to threadripper if it is a good as promised.
 
#7 ·
Wait the 3 weeks or so for Threadripper. If you absolutely have to have something right now consider looking into a used X99 setup as the prices are dropping fast. Even an X79 setup with an unlocked Xeon like an E5-1650 could hold you over the few weeks until something better is available. Used dual socket 2011 Xeon systems are often cheap for the value they offer too. I just bought 2 identical complete systems this week each with a pair of E5-2680 v2's and 32GB RAM for $700 each. That's 20 cores and 40 threads at 3.1GHz for each machine. Not that something like that will always be listed the second you're looking for it but if you can find one that's a steal for the multi-threading value if your work takes advantage of all the cores.
 
#9 ·
To the Op a 6950x at that price is a good deal

I bought one myself for $800.00 was able to overclock it to 4.4Ghz stable at 1.28 volts all ten cores

Now I also ran intels XTU and it passed I am also using adaptive voltage so it didn't do the full overclock because it really didn't need too

Max temps are around 76-80c using a 115i by Corsair on Balance mode if I put on performance mode it might drop 3c at best

Also I might add I am starting to tighten up setting I am clocking my cache at 34 with 1.24 volts

I also upped my Ram speed to it's almost rated speed to 3400+ and it seems to be rolling right now I just need to do a little more testing before putting this overclock to bed
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