Trashbytes wrote on 2026-06-30, 21:55:If the game/program can take advantage of the eDRAM cache itll be about an extra 10 - 15 percent, if its cache dumb then itll be […]
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Ozzuneoj wrote on 2026-06-30, 16:28:You overestimate my abilities and ambition. 😅 […]
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ElectroSoldier wrote on 2026-06-30, 09:12:
Why would you get two of them?
rmay635703 wrote on 2026-06-30, 15:21:
Yeah reverse modifying to a dual Xeon seems painful (unless there is a Chinese x99 that makes normal CPUs fit into dual mobo)
You overestimate my abilities and ambition. 😅
I got one for me to tinker with and one for a relative that is still basically happy with their Z97 system (currently equipped with an i7 4790 non-K). They play a variety of strategy\sim games and I'm curious how much of an effect the eDRAM cache will have on the ones that slow down a bit over time. Haven't had a chance to mess with either of them yet, but it's on the long list of projects.
If the game/program can take advantage of the eDRAM cache itll be about an extra 10 - 15 percent, if its cache dumb then itll be no better or worse than the 4790, the 4790 has the clock advantage with cache dumb software.
My own experience with the 5775c is that its not a great overclocker due to the extra cache and its hit and miss with games and their ability to use the extra cache, I would personally look for a cheap 4790k overclock it to 4.5Ghz and use that instead.
The eDRAM cache needed a few more years of development from Intel, its not as good as it looks on paper.
I got the chips specifically because of the eDRAM implementation and to see what impact it has in various scenarios. There is surprisingly little variety in the 5775C testing situations that people have recorded online. In some cases the performance difference can be massive (way more than 15%), but there is no way to know how it works in a specific situation without testing it. Memory speed can also be a factor, of course, since that can offset a lot of the gains that eDRAM would provide.
With regard to my relative (who does not live with me), I don't think an overclocked 4790K would make enough difference over the 4790 to be worth taking the time to mess with it, and to deal with the possible issues that could arise since the case and cooler may not be up to the task of keeping a 4790K happy at 4.5Ghz. It just isn't necessary for what he does with his machine. His GTX 1080 and 60Hz 1080P display aren't really used for anything too intensive outside of a handful of sims that are notorious for bringing all CPUs to their knees. A lot of those kinds of applications also benefit greatly from 3D V-cache, but no one has tested them on a 5775C. So, he and I are both curious as to whether a drop in CPU replacement could make a big difference for his specific needs.
What I told him was that I would like him to come over some time with his computer, I'll swap the chip and do a bunch of experimenting and benchmarking. If it makes an improvement in areas where he'd notice, then great! He can buy the chip off of me for what I paid (which was less than half of what they usually go for because I bought two!). If it doesn't make any difference, I'll take it back out and keep it for my own tinkering\collection. Either way, he gets his PC cleaned out and some fresh thermal paste at the very least. 🤣
I get to satisfy my curiosity and possibly extend the useful life of his computer.
I actually bought a pristine looking Z97 board recently that came in its box and was sold as "untested" but it was totally DOA with what seems like a bad\shorted PCH. So, my plans to tinker with one of these for myself have had to wait.
Anyway, enough about that...
Getting get back on the topic of RAM prices, I wonder how the law suit against the big memory manufacturers will go. My prediction is that it will take so long to be resolved (trial or not) that the consumer PC industry will be in shambles, or the bubble will have popped long ago and things will have already somewhat returned to normal (wishful thinking).
Now for some blitting from the back buffer.