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What I found about 5775c EDRAM's impact on gaming performance.

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I found the option in bios to OC my EDRAM as well as disable it. I chose WatchDogs2 as my benchmark because of how CPU dependent that games is. Resolution is 2560x1440 but graphics settings are low to rule out GPU bottleneck. The results are staggering.

EDRAM @2GHz - 118 FPS


EDRAM disabled - 91 FPS

EDRAM @1800MHz is probably the sweet spot tho, it was only 1fps less than 2000MHz so basically the same, within margin of error.

The difference was 29,6%, which is huge. I encourage other 5675/5775c owners to try, as long as your boards supports disabling the L4. Remember, you have to choose a CPU heavy game, and eliminate the bottleneck of the graphics card in order for the results to be comprehensible. Use HWmonitor64 to check if the changes actually apply. It should show edram clock and temperature, while when EDRAM is disabled in bios those options are missing. XTU also can show you the current edram reading, but while I've seen it work for one review, it doesn't work for me or some other people I saw posting on intel's forum. It shows 0MHz regardless if disabled,stock or oc. Use an even multiplier like 16/18/20x, the odd ones don't apply.

:rockout:
 
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yeah that was always one of the best chips for gaming... intel nipped that one real quick.
 
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Don't know if I mentioned that, the test was done twice to make sure I'm not dreaming that. I mean, I knew 5775c was dope for gaming (see the review), about the same level of performance as 7700K at less power draw. But to see a 30% gain from L4 alone is making me ask why do people still buy 7700Ks for gaming rigs, while 5775c run significantly cooler,just as fast as KL and doesn't require a new platform.
 

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Don't know if I mentioned that, the test was done twice to make sure I'm not dreaming that. I mean, I knew 5775c was dope for gaming (see the review), about the same level of performance as 7700K at less power draw. But to see a 30% gain from L4 alone is making me ask why do people still buy 7700Ks for gaming rigs, while 5775c run significantly cooler,just as fast as KL and doesn't require a new platform.

If you already are on LGA1150 it doesn't, but it's also €100 more than the 7700K where I live. There never was a lot of them, and they always were very expensive.
 
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That's a lot. 25-30 euro difference where I live.
 
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and they always were very expensive.
I thought of swapping out the 4790K for a 5775c after the lastest firmware update for my ASUS Z97 mobo but the cost wasn't worth it to me.
 
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I have heard pretty little about these processors, also I don't remember them even being sold in my country, also didn't read anything on the internet about these odd processors.
Why?
 
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The power savings and heat reduction compared to 4790K is amazing. My 4790K was much warmer and louder.
 
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I have heard pretty little about these processors, also I don't remember them even being sold in my country, also didn't read anything on the internet about these odd processors.
Why?
There was reviews posted everywhere when the NDA? was lifted.
 
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There was reviews posted everywhere when the NDA? was lifted.

Guess I was hibernating at the time lol...:p:D


It seems they still sell them at my country:

Capture.JPG
 
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I have heard pretty little about these processors, also I don't remember them even being sold in my country, also didn't read anything on the internet about these odd processors.
Why?

because they were espensif to make... 128 MB l4 is kind of a dig peal.
 
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The CPU was running stock 3.7GHz when I tested the L4, oveclocking it to 4.2GHz only made a 2 fps difference once the EDRAM was already doing its wonders. Now I'll disable the edram and compare the performance gain form 14% core OC but EDRAM disabled vs stock with L4 cache.

Updated: got 104 fps with 4.2GHz oc L4 disabled

so let's sum up

91-95 fps @3.7GHz EDRAM disabled
102-104 fps @4.2GHz EDRAM disabled
117-118 fps @3.7GHz EDRAM @2GHz
119-120 fps @4.2GHz EDRAM @1.8GHz (probably hitting some sort of bottleneck. I wager the game itself. I closely monitor the TDP/Power limit and it's not that. So either the game or the gpu)


12% increase from 14% core oc. Power draw and temps increased significantly.
29% increase from using 2GHz EDRAM. No observable power draw or temperature increase.

wonder how much megahurtz and watts it'd actually take for core oc only to match the increase from edram alone. Intel must be wishing they never released this beauty.
 
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Interesting, I always though the eDRAM was largely just used by the iGPU and was pretty useless to CPU tasks.

Makes me seriously consider picking up a 5775C...
 

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Recent open-world games released by Ubisoft are really hard on the CPUs for some reason lol. You should try benchmarking GR: Wildlands if you have it, the game hammers my 4790K at 4.8GHz pretty hard.
 
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Interesting, I always though the eDRAM was largely just used by the iGPU and was pretty useless to CPU tasks.

Makes me seriously consider picking up a 5775C...
It's accessible for cpu and igpu both. Not much to be found as for its function, but from what I understand it's like a low latency buffer between L3 and DRAM. Whatever its purpose, the benefits for cpu limited scenarios are huge.

Recent open-world games released by Ubisoft are really hard on the CPUs for some reason lol. You should try benchmarking GR: Wildlands if you have it, the game hammers my 4790K at 4.8GHz pretty hard.

was gonna pick up wildlands when the price drops, it did drop but now it jumped back so no go, not gonna pay that much for what we in Poland call "a reheated pork chop".
That said, many new games need ridiculous CPU resources. WatchDogs2 is one I like benchmarking, I found certain parts of Dishonored 2 to be a CPU hog as well. Battlefield 1 is an obvious example,Deus Ex Mankind Divided also shows huge demand for cpu resources.


testing The Witcher 3 now, Novigrad (cpu heavy), 1080p, low

CPU 3.7GHz L4 disabled - 130 fps
CPU 4.2GHz L4 disabled - 141 fps

edram 1.8GHz tests coming in a while.

CPU 3.7 L4 enabled - a whooping 157 fps (+21% over 3.7 L4 disabled)
CPU 4.2 L4 enabled - an even more whooping 175 fps (+24% over 4.2 L4 disabled)
 
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It's accessible for cpu and igpu both. Not much to be found as for its function, but from what I understand it's like a low latency buffer between L3 and DRAM. Whatever its purpose, the benefits for cpu limited scenarios are huge.

Yeah, it seems like it is used as strickly an L4 when the iGPU is disabled. Interesting...
 
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That seriously makes me want to buy one even though I'd have to buy a board to go with it
 
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I never understood why they didn't include this in later chips. It certainly made a large performance improvement. Wonder if it hurt profit margins.
 
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I never understood why they didn't include this in later chips. It certainly made a large performance improvement. Wonder if it hurt profit margins.
The L4 cache was too expensive to manufacture and made the CPU too good
 
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The L4 cache was too expensive to manufacture and made the CPU too good
No way. There is no reason a profit oriented business would say it was too good if they could sell it for enough money. I could understand too expensive, but if it was truly that good they could charge that much extra for it.

There is something else going on here. Review sites are showing the edram has a minimal performance gain.

If anything I think the OP is showing how much watchdogs utilizes memory speeds. These are high task specific performance gains in memory intensive applications.
 
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No way. There is no reason a profit oriented business would say it was too good if they could sell it for enough money. I could understand too expensive, but if it was truly that good they could charge that much extra for it.

There is something else going on here. Review sites are showing the edram has a minimal performance gain.

If anything I think the OP is showing how much watchdogs utilizes memory speeds. These are high task specific performance gains in memory intensive applications.
read the review. 5775c 4.2GHz beats 7700K 5GHz consistently ( review in my second post) in Battlefield 1, Dishonored 2, Hitman, Deus Ex MD, Witcher 3, Watch Dogs 2, Warhammer and Tombraider. I posted my own witcher 3 results as well and L4 has a 25% improvement there as well. Memory speed has an impact on every game when the particular sequence relies on cpu, it's not the case I'm making though, edram runs at 1600/1800/2000MHz speed as I pointed out numerous times. It's the latency that matters.
 
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read the review. 5775c 4.2GHz beats 7700K 5GHz consistently ( review in my second post) in Battlefield 1, Dishonored 2, Hitman, Deus Ex MD, Witcher 3, Watch Dogs 2, Warhammer and Tombraider. I posted my own witcher 3 results as well and L4 has a 25% improvement there as well. Memory speed has an impact on every game when the particular sequence relies on cpu, it's not the case I'm making though, edram runs at 1600/1800/2000MHz speed as I pointed out numerous times. It's the latency that matters.

+100 - So back in the FX days for AMD the only difference with the 4000+ CPUs and the FX were that the FX had 1mb L2 cache, and the rest 512kb... and the semprons had 256.... you would have to clock the sempron like 200Mhz-300Mhz above the FX (which back when 2.8 GHz was the top speed was alot...) to just get parity in SOME apps - Cache helps alot, memory latency is really core for games.

You can still run some benchmarks apps and see the old socket 754 Nforce 4 motherboards latency in the first 3 places - back when nvidia and AMD were friends.

also if you look at skylake X - the i9-7900 tends to beat/match the 7700k - the 7820x is more or less on par if not somewhat slower... and the 7800x is a bit of a joke - even in games that only use a few threads, having more cache is absolutely huge.

I think they realized if they didn't lock down clockspeed they would have another 2500K situation on their hands and shelved this design.
 
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Benchmark Scores A LOT
Shadow Warrior 2 (sorry about the OSD thing, it randomly changes to graph mode I used some time ago, dunno why)

4.2 L4 disabled 210 fps
4.2 L4 1.8GHz 240 fps (+14%)

http://imgur.com/a/24weB


4.2 L4 disabled 200 fps (framerate was freaking out, when L4 is disabled and CPU hits a bottleneck the stuttering is pretty bad, frametimes go nuts)
4.2 L4 1.8GHz 238 fps (+19%, smooth framerate, consistent frametimes)

http://imgur.com/a/UpQSn


Needs to be said that L4 helps a lot with preventing stuttering. Back when I was still running a 4790K hitting 90% or higher on all threads in watch dogs 2 equalled pretty obvious stuttering. Now even when I'm doing tests on low preset and the 5775c is pegged at 90% the effect ain't half as bad. There are some occasional hitches but the gameplay is much smoother.


Another WD2 location tested
4.2 Ghz L4 2Ghz - 110 fps (+32.5%)
4.2 Ghz L4. 1.8GHz - 109 fps (+31.3%)
4.2Ghz L4 1.6GHz - 101 fps (+21%)
4.2 Ghz L4 off - 83 fps

seems like a pattern. the higher the cpu usage, the bigger the impact of L4. +14-19% in shadow warrior 2 at 50-60% CPU usage, +30% in WD2 at all threads pegged at 90-100%.
 
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There is something else going on here. Review sites are showing the edram has a minimal performance gain.
When Tech Report posted their reviewed for the Skylake 6700K the Broadwell 5775C showed less drop off in Sandra cache and memory bandwidth at the 64MB block ( 128 MB L4 Cache.)


Higher bandwidth in AIDA64 memory copy.


Improved latency at the 64MB-128MB block size in Sandra cache and memory latency.


Ahead of the 4790K in AIDA64 PhotoWorxx


Project Cars, and so on for the gaming focused testing.

Higher frame rate

Less stuttering


Source link for the rest of the gaming benchmarks.
http://techreport.com/review/28751/intel-core-i7-6700k-skylake-processor-reviewed/6
 

newtekie1

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No way. There is no reason a profit oriented business would say it was too good if they could sell it for enough money. I could understand too expensive, but if it was truly that good they could charge that much extra for it.

It wasn't about it making the CPU too good, it was entirely because of cost. The eDRAM was a second die on the CPU package, and that die was about 50% of the size of the CPU die. Die space is what makes a CPU expensive to manufacture, and multiple dies on a package adds even more expense.
 
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