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AMD 7700/7900 Non X

almoststew1990

almoststew1990

almoststew1990

Soldato
Joined
12 May 2011
Posts
6,265
Location
Southampton
Hi everyone

I've been reading about the 7700 and 7900 Non X chips from AMD.

I watched a review from Linus Tech Tips (I don't know if he is good) and the 7900X offered frame rates in games around 5% lower than the non X version. The benefit however is that the max power consumption is 90 watts and it prime 95'd at 40c or so!

As someone who gets a bit fed up of the mega power draw and temperatures of modern CPUs this seems great and I even wondered if this means that you wouldn't need a 8pin ATX CPU power connector (I don't know if the 24 pin ATX connector delivery power to the CPU at all?) but anyway

I was getting all excited but then LTT did show a graph showing the power consumption of the CPU compared to the X variant when using a frame cap, and they were the same. So I thought that as long as the lower clocks of the nonX can deliver the capped frame rate, the X variant and non x will deliver the same frame rate at the same power. However the X version just offers headroom for harder tasks (or longlivity).

But then (I appreciate this is a bit of a rollercoaster) You can actually manually adjust the power profile in your bios to overclock the non-X to X levels of power consumption to deliver similar Cinebench scores! (within 1%) but I don't know if the overclocked clocks actually match the X version. They also didn't show any gaming OC frame rates so perhaps the gap between X and overclocked nonX is bigger than cinebench and handbrake.

With the non X chips being £40 cheaper, and the standard cooler is good enough for it, I would be quite tempted to get the nonX version for like an mATX build.

I've been eyeing up an upgrade from a 3700 and I'm tempted by this although the most sensible option would be to get a 5800X on my same X470 board.

Also here is the video link https://www.youtube.com/watch?v=CTiRNnSg0jA
 
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It all depends what you use your system for. If it’s just gaming 5800x3d job done. If it’s productivity then the 5900X or 5950x will do a job both have an eco mode.
 
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As said above, for gaming only, the X3D is the most effective option. From what I've seen of the reviews, the non-X have made the X CPUs rather redundant, so that's what I'd pick if I was changing.
 
almoststew1990 said:
I've been eyeing up an upgrade from a 3700 and I'm tempted by this although the most sensible option would be to get a 5800X on my same X470 board.

Put your wallet away and save a few quid for something more important. You are unlikely to notice the difference between your own processor and any of the 5000 series processors with your setup which is limited by your GPU as much as anything. Yes the fps may go up by 5 or 10 frames per second in some games - but you are unlikely to notice it in the real world.
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Cyber-Mav said:
Gamers nexus not happy with these cpus and say 13600k is best deal. I agree
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Maybe I watched a different Gamers Nexus review but he was quite positive about the 7900 but less so about the 7700. I would rather buy AM5 and have the choice of a drop in CPU upgrade down the line rather than pay the Intel tax of a new board every two years.
 
IPBA said:
Maybe I watched a different Gamers Nexus review but he was quite positive about the 7900 but less so about the 7700. I would rather buy AM5 and have the choice of a drop in CPU upgrade down the line rather than pay the Intel tax of a new board every two years.
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Lower end he said go 13600k. Gaming great and productivity it leaves the 7600 way behind.

The 7700 is in no man’s land.

The 7900 he liked. It’s in a good spot as the TPD limit doesn’t harm it and PBO gives it near enough x performance.
 
=XDC=FluphyBunny said:
Lower end he said go 13600k. Gaming great and productivity it leaves the 7600 way behind.

The 7700 is in no man’s land.

The 7900 he liked. It’s in a good spot as the TPD limit doesn’t harm it and PBO gives it near enough x performance.
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7700 is definitely not in no man's land for someone who wants a cool running gaming CPU on a platform with legs that likes the extra 2 cores for now or the future without feeling like upgrading could be forced on them sooner rather than later
 
IPBA said:
Maybe I watched a different Gamers Nexus review but he was quite positive about the 7900 but less so about the 7700. I would rather buy AM5 and have the choice of a drop in CPU upgrade down the line rather than pay the Intel tax of a new board every two years.
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My post was before 7900 review came out and was about the 7700 and 7600.
7900 is a decent offering but with 3d vcache on the horizon its gonna get interesting in the cpu world
 
almoststew1990 said:
With the non X chips being £40 cheaper, and the standard cooler is good enough for it, I would be quite tempted to get the nonX version for like an mATX build.
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I am in the same boat. I really fancy building mATX or even ITX, and a cpu that's a bit easier to cool but "good enough" would seem smart. If the cooler isn't obnoxious under gaming load, then the price gap is actually quite significant.

But I do want to see what the X3Ds come out like - especially how they respond if set to eco mode with 65 or 105W limits :D

=XDC=FluphyBunny said:
Lower end he said go 13600k. Gaming great and productivity it leaves the 7600 way behind.
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Tbh, it's barely fair to compare the 7600 to a 13600K, the latter has so many more threads. Even if most of them are E cores there's cases where you get one big thread that's the bottleneck and lots of threads that want like 20-30% of a core each, and those would happily sit on Es.
 
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