Haswell Preview Benchmark - Page 28

db597 · 2013-09-13, 03:38

Quote:

Originally Posted by TheJudger

Please ignore voltage and power consumption, I'm currently running 4000MHz at 1250mV, 1200mV isn't stable for Linpack.

Oliver... just curious what memory are you using? With DDR3 2000, my setup is v28.1 stable at 4000MHz / 1250mV, same as yours. If I clock at 4200MHz, even 1265mV gave a BSOD twice a day (and at 1275mV, temps were > 80 degrees, so I did only limited testing).

If we use faster memory to relieve the memory bottleneck, the CPU may also be stressed more and in turn that may affect stability again.

TheMawn · 2013-09-13, 03:43

If you're having problems with the memory, look into increasing the memory controller's juice. For Ivy Bridge, anyway, that's the VCCSA, mostly, and also the VCCIO. Look them up for your particular hardware, first, as it's been known that there is a fine line.

Batalov · 2013-09-13, 04:02

I think I finally got my system stable with a (not so recommended) VCCSA=1.22v, and all 2400MHz XMP specs intact (10-12-12-31-2T), + CPU Freq 4200 + air cooling (CMaster TPC 612). But this is probably still not over.

Ken_g6 · 2013-09-13, 16:28

Look what's running on a Haswell-E prototype!

No idea what version, though. Probably not 28.1.

Mark Rose · 2013-09-13, 16:32

I have a Haswell (i7-4770 CPU @ 3.40GHz, hyperthreading enabled), but only 1600 MHz memory. I am considering running 28.1.

I realize I haven't got the memory bandwidth to even fully utilize the 4 cores. I've tried setting NumCPUs=3 in prime.txt, but mprime always queues work and runs 4 processes. Is there a proper way to get mprime to only use 3 cores? If I can keep a core free I'll turn off hyperthreading.

henryzz · 2013-09-13, 17:42

Quote:

Originally Posted by Ken_g6

Look what's running on a Haswell-E prototype!

No idea what version, though. Probably not 28.1.

27.9

Prime95 · 2013-09-13, 18:10

Quote:

Originally Posted by Mark Rose

I have a Haswell (i7-4770 CPU @ 3.40GHz, hyperthreading enabled), but only 1600 MHz memory. I am considering running 28.1.

I realize I haven't got the memory bandwidth to even fully utilize the 4 cores. I've tried setting NumCPUs=3 in prime.txt, but mprime always queues work and runs 4 processes. Is there a proper way to get mprime to only use 3 cores? If I can keep a core free I'll turn off hyperthreading.

Try setting NumWorkers=3? NumCPUs=3 should be in local.txt.

TheJudger · 2013-09-13, 18:59

Quote:

Originally Posted by ewmayer

Do your timings imply that you are able to run v28 stably?

Yes, so far no issues. The difference is too big for just 100 or 200MHz difference when you compare 27.9 to 28.1. This system isn't doing some real work, just testing, etc. so far. But my feeling (and the fact, that Linpack still crashes much faster than v28.1 on higher clocks) tells me, that 4000MHz is OK for my system.

Quote:

Originally Posted by db597

Oliver... just curious what memory are you using? With DDR3 2000, my setup is v28.1 stable at 4000MHz / 1250mV, same as yours. If I clock at 4200MHz, even 1265mV gave a BSOD twice a day (and at 1275mV, temps were > 80 degrees, so I did only limited testing).

If we use faster memory to relieve the memory bottleneck, the CPU may also be stressed more and in turn that may affect stability again.

2x 8GiB DDR3-2133 1.5V CL11 (some fancy Corsair memory)

Oliver

Mark Rose · 2013-09-13, 21:56

Quote:

Originally Posted by Prime95

Try setting NumWorkers=3? NumCPUs=3 should be in local.txt.

Putting NumCPUs in local.txt worked perfectly. Thanks!

I noticed that I only loose 15% performance per core when I go from 3 to 4 cores. So I still get a 13% improvement running four cores with 1600 MHz memory using 27. I'll test with 28 later. Maybe there will be no benefit to the 4th core then.

Mark Rose · 2013-09-13, 23:53

Okay, so I got a noticeable improvement from 28.1. And I've overclocked my RAM to 2000 MHz (and increased the timings from 9's to 10's) and I seem to be getting near the max output from all four cores now. Awesome.

Prime95 · 2013-09-14, 01:12

I'm upgrading my i7-860 computer by replacing the motherboard, CPU, and memory. The CPU is the Haswell 4670K, memory is DDR3-2400.

I recycled the i7-860 CPU cooler: http://www.newegg.com/Product/Produc...82E16835103064

Right now, with CPU at 3.6GHz, voltage at 1.08 (I can't turn off adaptive voltage, so this should mean 1.18V running AVX instructions), and memory at DDR3-2400, I'm getting temps of 90C running prime95 (up to 100C running the small torture test).

Does this sound right?

Tomorrow, I'll try either 1) reapplying the thermal compound, or 2) using the stock CPU cooler, or both to see if temperatures get any better. I had hoped to get this running at least somewhat close to my first Haswell box running at 4.1GHz, 1.2V (adaptive voltage off), DDR3-2400 and temps of around 80C.

2013-09-14, 01:12	#308
Prime95 P90 years forever! Aug 2002 Yeehaw, FL 19×397 Posts	Damn, this is HOT! I'm upgrading my i7-860 computer by replacing the motherboard, CPU, and memory. The CPU is the Haswell 4670K, memory is DDR3-2400. I recycled the i7-860 CPU cooler: http://www.newegg.com/Product/Produc...82E16835103064 Right now, with CPU at 3.6GHz, voltage at 1.08 (I can't turn off adaptive voltage, so this should mean 1.18V running AVX instructions), and memory at DDR3-2400, I'm getting temps of 90C running prime95 (up to 100C running the small torture test). Does this sound right? Tomorrow, I'll try either 1) reapplying the thermal compound, or 2) using the stock CPU cooler, or both to see if temperatures get any better. I had hoped to get this running at least somewhat close to my first Haswell box running at 4.1GHz, 1.2V (adaptive voltage off), DDR3-2400 and temps of around 80C.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Haswell-E Prelim. Benchmark	sdbardwick	Hardware	37	2015-02-10 18:49
Prime95 and Haswell	Pleco	Information & Answers	22	2014-07-13 16:03
Haswell Rig	Mini-Geek	Hardware	64	2014-05-27 13:22
Prime95 version 27.1 early preview, not-even-close-to-beta release	Prime95	Software	126	2012-02-09 16:17
Missing mouse-over preview text	retina	Forum Feedback	1	2011-09-12 15:32

2013-09-13, 03:43	#299
TheMawn May 2013 East. Always East. 11·157 Posts	If you're having problems with the memory, look into increasing the memory controller's juice. For Ivy Bridge, anyway, that's the VCCSA, mostly, and also the VCCIO. Look them up for your particular hardware, first, as it's been known that there is a fine line.

2013-09-13, 04:02	#300
Batalov "Serge" Mar 2008 Phi(4,2^7658614+1)/2 2519₁₆ Posts	I think I finally got my system stable with a (not so recommended) VCCSA=1.22v, and all 2400MHz XMP specs intact (10-12-12-31-2T), + CPU Freq 4200 + air cooling (CMaster TPC 612). But this is probably still not over.

2013-09-13, 16:28	#301
Ken_g6 Jan 2005 Caught in a sieve 18B₁₆ Posts	Look what's running on a Haswell-E prototype! No idea what version, though. Probably not 28.1.

2013-09-13, 16:32	#302
Mark Rose "/X\(‘-‘)/X\" Jan 2013 2·5·293 Posts	I have a Haswell (i7-4770 CPU @ 3.40GHz, hyperthreading enabled), but only 1600 MHz memory. I am considering running 28.1. I realize I haven't got the memory bandwidth to even fully utilize the 4 cores. I've tried setting NumCPUs=3 in prime.txt, but mprime always queues work and runs 4 processes. Is there a proper way to get mprime to only use 3 cores? If I can keep a core free I'll turn off hyperthreading.

2013-09-13, 23:53	#307
Mark Rose "/X\(‘-‘)/X\" Jan 2013 2·5·293 Posts	Okay, so I got a noticeable improvement from 28.1. And I've overclocked my RAM to 2000 MHz (and increased the timings from 9's to 10's) and I seem to be getting near the max output from all four cores now. Awesome.