Haswell Rig

[TheMawn]

Originally Posted by kracker

The post you're confused about is me figuring out I was wrong after you pointed it out. I don't know what your uncertainty is about...

Originally Posted by ewmayer

Misling people is frowned upon around here, but as in this case it appears to have been unintentional, we'll let it slide.

What I meant was I've seen threads in other forums with people talking about the i5-4570k, and I drew the conclusion is that the 4570k was a thing, when in fact they were wrong as well.

[kladner]

Originally Posted by TheMawn

The post you're confused about is me figuring out I was wrong after you pointed it out. I don't know what your uncertainty is about...



What I meant was I've seen threads in other forums with people talking about the i5-4570k, and I drew the conclusion is that the 4570k was a thing, when in fact they were wrong as well.

Typos happen, too. We've seen a complaint from Xyzzy that GPU nomenclature is too confusing. I suspect that when you write about such stuff all the time, the alphanumeric soup sloshing around one's brain can generate some brain methane, aka brain farts.

[TheMawn]

Lol brain methane

[Batalov]

Brain methane is mostly harmless.
It is brain methanethiol that is dangerous (to others).

[henryzz]

I think the problem is the 25xx and 35xx were both i5 and 26xx, 27xx and 37xx were i7. Now they make 46xx an i5 and that confuses everyone.

[Mini-Geek]

Well, there were a few on-topic replies.

Originally Posted by kracker

Nope, looks quite good.

I have the same CPU and RAM(G.Skill) and still heavily memory bottlenecked.

EDIT: Also, that i5 4430 is mine, with slow dual 1600 memory. 4670k benchmark with dual 2400

Ok, 2400 sounds good then.

Originally Posted by TheMawn

The H80i is going to be very good for cooling. It performs similarly to a custom solution at a much lesser price (and a much lesser level of fun involved in assembly )

The H80i fans are garbage. Both of mine were obscenely loud. Buy a pair of http://www.newegg.ca/Product/Product...82E16835103061. You can even get some that light up!

Thanks for the suggestion, I wasn't even aware you could change out the fans.

Originally Posted by TheMawn

2400 MHz RAM is good. It's gotten more expensive since the Hynix fire and hasn't gone back down, and a lot of skeptics think that memory will never be that cheap ever again. On the other hand, they're wrong. Still, if you need the memory now, it's worth paying an extra $50 than to wait for a few months and use some other kit in the meantime (which most people would have to pay for anyway)

Eh, when you're upgrading the better portion of the whole computer (I have other upgrades that I didn't list here because they are simpler choices), $50 to make sure the RAM doesn't bottleneck me (much) isn't a big deal.

Originally Posted by chalsall

Just putting this out there...

I have found, with a great deal of experimentation, that bringing more (real) cores of a single CPU into a LL test can reduce the memory bandwidth issues and improve performance (thanks to the caches), so long as the affinity is done correctly.

I more than doubled my LL throughput by assigning a single LL to multiple (real) cores of a single CPU, thus lessening the memory bandwidth requirements. (This did, however, require I run two instances of mprime in a dual CPU environment -- mprime was unable to manage the situation appropriately itself.)

I'll be sure to set it up for best performance. The benchmarks in the newest versions of Prime95 seem to be very good at trying different things to tell you what'd be best. Takes much longer than the old days where you just had one test to run, but it's much more useful.

[ewmayer]

Originally Posted by TheMawn

What I meant was I've seen threads in other forums with people talking about the i5-4570k, and I drew the conclusion is that the 4570k was a thing, when in fact they were wrong as well.

I think I know you well enough from your posts around here to be sure you would never misle anyone deliberately ... was just making a mod-centric comment on forum etiquette in that regard.

No man is a mis-land, and all that.

[Mini-Geek]

Originally Posted by Mini-Geek

Haswell i5-4670K 3.4GHz CPU
CORSAIR H80i for cooling
2x8GB DDR3 2400 G.SKILL Trident X Series memory
ASRock Z87 Extreme4 motherboard

Due to a last-minute price hike on the H80i (+$15 overnight, on both Newegg and Amazon! they must've colluded just for me...), I went with the H75, which is largely the same but without Corsair Link (to monitor/change things via USB control). Also, G.SKILL's Ripjaws series was significantly cheaper ($143 after 10% off vs $189) with nearly the same stats, so I went with that.

I also got a pair of the fans that TheMawn suggested. One review I read showed they had terrible cooling performance, but I think that must've been due to faulty fans or installation, since others have reported better results.

Thanks to all who read and/or answered this. Now to wait for my parts and hope I don't need to return any of them...

[kracker]

Originally Posted by Mini-Geek

Due to a last-minute price hike on the H80i (+$15 overnight, on both Newegg and Amazon! they must've colluded just for me...), I went with the H75, which is largely the same but without Corsair Link (to monitor/change things via USB control). Also, G.SKILL's Ripjaws series was significantly cheaper ($143 after 10% off vs $189) with nearly the same stats, so I went with that.

I also got a pair of the fans that TheMawn suggested. One review I read showed they had terrible cooling performance, but I think that must've been due to faulty fans or installation, since others have reported better results.

Thanks to all who read and/or answered this. Now to wait for my parts and hope I don't need to return any of them...

Good luck!

[TheMawn]

Looks good! The H75 has a thinner radiator, which may end up playing in your favour depending on your case layout. A thick radiator plus two fans takes up a surprising amount of space.

The good news is that it will take a lot less pressure to get the air to flow through the thinner radiator so you will get more air flow for the same noise level, at the expense of some cooling performance. More flow over less area vs less flow over more area.

My experience with the Sickle Flow fans is pretty good. I'm impressed with the flow through my own thick radiators. The "terrible" cooling performance is probably on the user's end.

I have actually seen a self-proclaimed 5/5 super expert complaining about a fan being crap because two of them overheated his CPU within seconds. He said he knew more about fans than anyone else because he had tested dozens of different pairs of fans on this heatsink. As it turned out, the know-it-all couldn't tell which direction the air flow went on a fan and because this one wasn't labelled, he ended up having the fans pointed at each other.

(Hint: fold your hand to make a cup shape like the fan blades; air flows in the direction outward from your palm)


I personally have eight Sickle Flows. Two of them have a whining sound above 8 volts or so but the noise from the other six is purely air whooshing.

[Mini-Geek]

I got everything running over the weekend, and it's looking very good so far! The CPU is running at 4GHz (at 4.2GHz I got a BSOD after a few minutes of Prime95's stress test), using the motherboard's built-in OC settings, and the RAM is at 2400Mhz with the default XMP profile.

Compare your results to other computers at http://www.mersenne.org/report_benchmarks
Intel(R) Core(TM) i5-4670K CPU @ 3.40GHz
CPU speed: 3988.43 MHz, 4 cores
CPU features: Prefetch, SSE, SSE2, SSE4, AVX, AVX2, FMA
L1 cache size: 32 KB
L2 cache size: 256 KB, L3 cache size: 6 MB
L1 cache line size: 64 bytes
L2 cache line size: 64 bytes
TLBS: 64
Prime95 64-bit version 28.5, RdtscTiming=1
Best time for 1024K FFT length: 3.823 ms., avg: 4.109 ms.
Best time for 1280K FFT length: 4.808 ms., avg: 5.130 ms.
Best time for 1536K FFT length: 5.860 ms., avg: 5.946 ms.
Best time for 1792K FFT length: 6.991 ms., avg: 8.769 ms.
Best time for 2048K FFT length: 7.901 ms., avg: 8.053 ms.
Best time for 2560K FFT length: 10.125 ms., avg: 10.228 ms.
Best time for 3072K FFT length: 12.196 ms., avg: 12.271 ms.
Best time for 3584K FFT length: 14.447 ms., avg: 14.589 ms.
Best time for 4096K FFT length: 16.517 ms., avg: 16.658 ms.
Best time for 5120K FFT length: 20.992 ms., avg: 21.127 ms.
Best time for 6144K FFT length: 25.359 ms., avg: 25.502 ms.
Best time for 7168K FFT length: 30.196 ms., avg: 30.334 ms.
Best time for 8192K FFT length: 34.975 ms., avg: 35.111 ms.

With my 84K FFT LLR work, the speed dropped from 1.16 ms (225/day) to 0.27 ms (965/day). Impressive!

At 4GHz, the cooler keeps the CPU at about 80C (ambient is 25C) on 84K FFTs or about 70C on DC-sized (2M) FFTs.