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8700k availability - Page 2

post #11 of 16
Quote:
Originally Posted by HOPELESSLYFAITH View Post

whats what people say when they dont understand the importance of single thread and stability with better RAM with better IMCs
Not to mention chipset improvement assuming you dont need the CPU lanes
post #12 of 16
Quote:
Originally Posted by pantsaregood View Post

Jumping from 4.5 GHz (typical for Haswell) to 5.0 GHz (likely typical for Coffee Lake) is only an 11% increase in clock speeds. Haswell-Skylake IPC increase is typically around 5%, so you have a total increase of 16% or less - that's very much a sidegrade, considering my i5-2500K to i7-7820X upgrade yielded over a 300% increase in raw compute power.

Haswell to broadwell was 5%. Skylake from Broadwell was another 5%.

If he has a 5820k at 4.5ghz (pretty high, most people who didn't get a binned chip are only running 4.4), and he gets an SL chip that gets 5.1gHz, that's more like 25-29% improvement along with all the goodies involved with the Z370 chipset over X99.

If he built X99 near launch, he probably has 2666 CL16 RAM at best as well. Now you can buy 3200 CL15 RAM no big deal for another high single digit improvement. Overall gaming performance of the system in CPU limiting situations would be a solid 30% or more improved.

Pretty lean tbh, considering I'd expect a 5.1GHz SL 8700k to be a solid $500, plus the motherboard, plus the RAM you're talking a nearly $1000 upgrade for 30% improvement, but his X99 RAM+Mobo+5820k should sell for $375 or so no problem. So maybe a $450-500 upgrade for 30% plus the 'fun' of a new toy to play with. Seems fine by me.
post #13 of 16
Quote:
Originally Posted by Shandl4r View Post

Haswell to broadwell was 5%. Skylake from Broadwell was another 5%.

If he has a 5820k at 4.5ghz (pretty high, most people who didn't get a binned chip are only running 4.4), and he gets an SL chip that gets 5.1gHz, that's more like 25-29% improvement along with all the goodies involved with the Z370 chipset over X99.

If he built X99 near launch, he probably has 2666 CL16 RAM at best as well. Now you can buy 3200 CL15 RAM no big deal for another high single digit improvement. Overall gaming performance of the system in CPU limiting situations would be a solid 30% or more improved.

Pretty lean tbh, considering I'd expect a 5.1GHz SL 8700k to be a solid $500, plus the motherboard, plus the RAM you're talking a nearly $1000 upgrade for 30% improvement, but his X99 RAM+Mobo+5820k should sell for $375 or so no problem. So maybe a $450-500 upgrade for 30% plus the 'fun' of a new toy to play with. Seems fine by me.
it was 1.5-3% from each one definitely not 5%. Go read anandtechs IPC review
post #14 of 16
Quote:
Originally Posted by HOPELESSLYFAITH View Post

it was 1.5-3% from each one definitely not 5%. Go read anandtechs IPC review

The LGA 1150 Broadwell CPUs exaggerated the difference in IPC because of the L4 cache.
post #15 of 16
Quote:
Originally Posted by HOPELESSLYFAITH View Post

it was 1.5-3% from each one definitely not 5%. Go read anandtechs IPC review

If you are referring to Anandtechs Skylake launch revieve from August 5th, 2015, that has been proven to be false at this point. They had issues with their RAM that was causing the IPC measurements to appear so poor. They were literally showing the lowest performance delta of any of the ~35+ tech junkie launch day posts on the web.

I personally went from Haswell to Skylake and did my own testing. There is a 4-19% IPC improvement based on which benchmark, with the average being around 11-13% overall. We are getting ~1640-1650 cinebench scores from 5.0ghz 8700ks now. Showing a solid ~15% IPC improvement in that test from Haswell to Coffeelake.

So regardless of the dispute of Haswell to Broadwell to Skylake, we are seeing solid double digits from Haswell to Coffeelake. So a 4.4ghz 5820k to a 5.1ghz 8700k should be a rock solid 30%, upwards of 35% performance improvement that is *all* thread performance, which is extremely valuable, given how few things leverage more than 12 threads nowadays anyway.
post #16 of 16
any links because i never thought i felt double digits IPC gains from a 4.8 SL HW- 4.8 SL SKL. I felt like it was only a 5 ish percent boost and a lot from RAM boost.

I went top 2400mhz DDR3 RAM to top 3200MHz DDR4 RAM ( note there are better ones now but these were the best available when i bought and i paid out the ass for these lol)

2400 10-12-12-31
to
3200 14-14-14-32/34?

worst case
MT........MHz.....ns..........CL.....1st word....4th word..........8th word
3200.....1600....0.625.....14......8.75...........9.6875...........10.9375....ns

worst case
MT........MHz.....ns..........CL.....1st word....4th word..........8th word
2400.....1200....0.833.....12......10..............11.25..............12.91667....ns


note a CL 10 when everything else is 12 is really pointless so i assume the worst.

@silicon lottery if you have problem with me posting this PM please PM me/report and i will gladly edit/delete. This was far simpler than paraphrasing with links. Sorry *bows in forgiveness*

The ? quote was to tag/notify SL because i somehow cant remember how to tag him with the @ way lol....1:30am and like 2 hourrs of sleep in 48 hours so .....bugg off hahaha
Quote:
Originally Posted by Silicon Lottery View Post

?

SL PMed me. I delted quote. If i remember/get time i'll try to paraphrase our like 30 PM message but the difference in web browsing like kraken which i care about is not double ditgits IIRC in IPC but phase change to 5.5-5.7GHz is really epic and really depends on RAM. AI relies on lower latency which i had but he had higher BW and high latency and killed me in every other metric. I have posted those links in other pages but if you PM me or haggle me I'll get around to posting those again but wine, anime, NS2, war thunder, and X rated things (hehe) are calling me at 2 am lol
Edited by HOPELESSLYFAITH - 10/11/17 at 11:56pm
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