i7-7820X Reviews

[Curufinwe_wins]

Just now, VagabondWraith said:

I think once bios updates start coming out, and users start getting their hands on them, we'll get a clearer picture of the platform as a whole. 

 

Like Ryzen, it's a downside to day 1 reviews. It never shows the whole complete picture of a new platform.

I mean even now. High throughput, high power consumption, but perfectly acceptable power consumption when not going super hap on the throughput.

 

That is the sort of thing I'll always be ok with. Personally.

[Fonzie92]

3 hours ago, PCGuy_5960 said:

Meh, 4.7GHz at 1.2V is more than enough for me

4.7ghz i7 2600k is enough for me.. you know, after almost a decade later, I really wish I had the motivation / incentive to upgrade!  Poor me...

 

 

[OriAr]

1 minute ago, Fonzie92 said:

4.7ghz i7 2600k is enough for me.. you know, after almost a decade later, I really wish I had the motivation / incentive to upgrade!  Poor me...

 

 

Moar cores is a good incentive to upgrade, at least to me  

[Taf the Ghost]

26 minutes ago, VagabondWraith said:

I think once bios updates start coming out, and users start getting their hands on them, we'll get a clearer picture of the platform as a whole. 

 

Like Ryzen, it's a downside to day 1 reviews. It never shows the whole complete picture of a new platform.

That and Intel stopped giving out review samples.  Or didn't give them out to most European outlets.

 

Or that 1/2 of the Processors are still in paper-launch mode.

 

It's going to be December before we actually know the conclusion to the entire debate.

[Drak3]

1 hour ago, tom_w141 said:

Trust me

I don't.

[goodtofufriday]

58 minutes ago, Curufinwe_wins said:

But should it be? The card is rather well known for shitting the bed in small itx enclosures... 

 

I mean it really doesn't matter either way, but it isn't like Anandtech recommended the nano either...

If im not wrong that was the 480 taking too much power from the pcie slot. Which wasnt an issue in the 580.

 

Nano usually gets recommened for cases like the CM110. But in the past few years people have been wanting to do full length cards, so I could see if now a days the nano isnt recommended. 

[DXMember]

1 hour ago, Curufinwe_wins said:

Not a value buy, but arguably a very powerful one. And for cheaper than a 1800x, the 7800x looks to be a much better single threaded chip, and often beating it in heavily threaded loads. Still, not going to replaced my 5820k.

PCPer review shows problems with gaming workloads and thread to thread latency inherent to Skylake-X architecture going from ring-bus to mesh-bus and playing with the L3$, might prove interesting on MISD and cross validation workloads or the likes

[Noirgheos]

2 minutes ago, DXMember said:

PCPer review shows problems with gaming workloads and thread to thread latency inherent to Skylake-X architecture going from ring-bus to mesh-bus and playing with the L3$

Unless they fix this, I may be going for X99. CPUs are going damn cheap on the classifieds. 

[DXMember]

1 minute ago, Noirgheos said:

Unless they fix this, I may be going for X99. CPUs are going damn cheap on the classifieds. 

there's nothing to fix, that's a design decision

[Noirgheos]

Just now, DXMember said:

there's nothing to fix, that's a design decision

Better word would be "optimized". Will Intel be adopting this for future architectures? Doesn't bode well for Coffee, Cannon, and Ice.

[DXMember]

Just now, Noirgheos said:

Better word would be "optimized". Will Intel be adopting this for future architectures? Doesn't bode well for Coffee, Cannon, and Ice.

unless they go for cutting down production costs I don't think so, low core count doesn't benefit from the new design, high core count gets hit a bit, super-high core count is probably more efficient with the new design

[Noirgheos]

Just now, DXMember said:

unless they go for cutting down production costs I don't think so, low core count doesn't benefit from the new design, high core count gets hit a bit, super-high core count is probably more efficient with the new design

I was looking at the 7800X, but unless it overclocks nice enough to match the 7700K or beat it in games, I probably won't do that. How noticeable are the effects? What are some of the effects of this increased latency?

 

Probably wait for Coffeelake and the 8700K at this point. Hex-core mainstream sounds nice.

[DXMember]

5 minutes ago, Noirgheos said:

I was looking at the 7800X, but unless it overclocks nice enough to match the 7700K or beat it in games, I probably won't do that. How noticeable are the effects? What are some of the effects of this increased latency?

Varies from game to game, OS and game engine developers can optimize around it, but will they??

https://www.pcper.com/reviews/Processors/Intel-Core-i9-7900X-10-core-Skylake-X-Processor-Review/Thread-Thread-Latency-and-

 

5 minutes ago, Noirgheos said:

Probably wait for Coffeelake and the 8700K at this point. Hex-core mainstream sounds nice.

Unless it's on X299 platform with half the memory banks disabled, 3/4 of the PCIe cut off and on $350 motherboards

[Noirgheos]

4 minutes ago, DXMember said:

Varies from game to game, OS and game engine developers can optimize around it, but will they??

https://www.pcper.com/reviews/Processors/Intel-Core-i9-7900X-10-core-Skylake-X-Processor-Review/Thread-Thread-Latency-and

Probably not, which really turns me off from Skylake-X now. I wonder how the 7800X and 7820X are affected? Probably to a lesser degree, but Broadwell-E may still just be overall better performing in games than Skylake-X while both are at matching clocks. 

[Taf the Ghost]

9 minutes ago, Noirgheos said:

I was looking at the 7800X, but unless it overclocks nice enough to match the 7700K or beat it in games, I probably won't do that. How noticeable are the effects? What are some of the effects of this increased latency?

 

Probably wait for Coffeelake and the 8700K at this point. Hex-core mainstream sounds nice.

Wait for Coffeelake. Unless you need all of the I/O, there's no reason to get it for gaming.

[PCGuy_5960]

Just now, Noirgheos said:

Probably not, which really turns me off from Skylake-X now. I wonder how the 7800X and 7820X are affected? Probably to a lesser degree, but Broadwell-E may still just be overall better performing in games than Skylake-X while both are at matching clocks. 

Yeah, but the 7800X/7820X can get 4.5-4.7Ghz at 1.25V! If you delid them, you can probably get 5GHZ

[Noirgheos]

Just now, PCGuy_5960 said:

Yeah, but the 7800X/7820X can get 4.5-4.7Ghz at 1.25V! If you delid them, you can probably get 5GHZ

True, but the 6800K has a much larger L3 cache, which I guess would help quite a bit with multitasking. Its weird what Intel's done.

[Taf the Ghost]

1 minute ago, Noirgheos said:

Probably not, which really turns me off from Skylake-X now. I wonder how the 7800X and 7820X are affected? Probably to a lesser degree, but Broadwell-E may still just be overall better performing in games than Skylake-X while both are at matching clocks. 

Some games are effected.  Apparently Hitman in DX12 sees an uplift at 1440p, which still doesn't make much sense.  It must simply be an interaction between the 1080/Ti class and the platform in that game/API, as it hasn't shown up any where else.

 

For gaming? Either a 7700k or wait for Coffeelake in a few months.  And that's only if you're buying a 1080/Ti. 1070 and below, there's almost no difference from anything from an i3 up to a 7700k.

[PCGuy_5960]

Just now, Noirgheos said:

True, but the 6800K has a much larger L3 cache, which I guess would help quite a bit with multitasking. Its weird what Intel's done.

Yeah the 7800X/7820X have a 4x larger L2 cache tho  This is why the L3 cache is smaller

[Noirgheos]

Just now, Taf the Ghost said:

Some games are effected.  Apparently Hitman in DX12 sees an uplift at 1440p, which still doesn't make much sense.  It must simply be an interaction between the 1080/Ti class and the platform in that game/API, as it hasn't shown up any where else.

 

For gaming? Either a 7700k or wait for Coffeelake in a few months.  And that's only if you're buying a 1080/Ti. 1070 and below, there's almost no difference from anything from an i3 up to a 7700k.

Definitely not "upgrading" to a quad-core again, so I just hope the Coffeelake i7 is a nicely clocked hex-core.

[Noirgheos]

Just now, PCGuy_5960 said:

Yeah the 7800X/7820X have a 4x larger L2 cache tho  This is why the L3 cache is smaller

Isn't L2 largely used for registers and the like? L3 is closer to system RAM iirc.

[PCGuy_5960]

Just now, Noirgheos said:

Isn't L2 largely used for registers and the like? L3 is closer to system RAM iirc.

AFAIK, a larger L2 cache is (usually) better than a larger L3 cache.....

[Taf the Ghost]

Just now, Noirgheos said:

True, but the 6800K has a much larger L3 cache, which I guess would help quite a bit with multitasking. Its weird what Intel's done.

The Mesh system scales to a LOT of cores.  They use it in their 72 core Xeon Phi products.  The Ring Bus gets really expensive/large with more cores.

 

It's simply a different approach that's not aimed at Gaming. IPC is actually down by a few % in a number of directions on SK-X vs Skylake normal. It's up in a few types of tasks (which hit pretty much all of the reviews), but it's mostly sideways.  So they're lower clocked 7700ks, pretty much.

[Noirgheos]

1 minute ago, PCGuy_5960 said:

AFAIK, a larger L2 cache is (usually) better than a larger L3 cache.....

Probably just not paying attention in my engineering classes. I tend to much prefer the programming courses we do to compliment the hardware. Oh well, we'll see how the 7800X performs clock for clock to the 6800K.

[Enderman]

5 hours ago, tom_w141 said:

The 7820X is at around 400W and yes OC results are valid because the 1800X was oc'd too.

393 - 307 = 86W

Where are you getting 180 from...