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Not up to speed. My i7 920?

post #1 of 7
Thread Starter 
ok so i looked on the GFLOPS Data thread here on OCN. People with an i7 920 @ 4GHz are all hitting around 57 GFOPS with Intel IBT, Auto, High settings. I only hit between 45-48GFOPS. Is it anything to do with my memory timings?
999 20.

I've tried tightening the timings. I can't even hit 998 20 so there is no chance. That's with the RAM underclocked to 1100mhz.

Thank you
Edit: My CPU is at 4GHz.
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post #2 of 7
You have HT turned on. With HT on, you will only get the figures you are seeing. Turn HT off to get around 60Gflops.
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Weedy
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post #3 of 7
The memory has a small impact. But with my system it was less than 1 GFlop.
From 9-9-9-24@1333MHz to 9-8-8-23@1470MHz i couldn`t get even a single GFlop out of it.
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/* Redemption*/
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post #4 of 7
Thread Starter 
Quote:
Originally Posted by weidass View Post
You have HT turned on. With HT on, you will only get the figures you are seeing. Turn HT off to get around 60Gflops.
That is with people Using HT. (the result on the thread)
Why would no HT increase speed?
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X79-GCN
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post #5 of 7
The documentation from intels linepack says this:

"Intel Optimized LINPACK Benchmark is threaded to effectively use multiple processors. So, in multi-processor systems, best performance will be obtained with Hyper-Threading technology turned off, which ensures that the operating system assigns threads to physical processors only."
(From section 11 of the user's guide)
If the documentation say so we have to obey
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/* Redemption*/
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post #6 of 7
Thread Starter 
Quote:
Originally Posted by Mr.Eiht View Post
The documentation from intels linepack says this:

"Intel Optimized LINPACK Benchmark is threaded to effectively use multiple processors. So, in multi-processor systems, best performance will be obtained with Hyper-Threading technology turned off, which ensures that the operating system assigns threads to physical processors only."
(From section 11 of the user's guide)
If the documentation say so we have to obey
rep+
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X79-GCN
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Hard DriveCoolingCoolingCooling
Samsung 840 Pro 120GB EK Supremacy (CPU) NF F12's P/P (360 Rad)  NF A14's (420 Rad)  
CoolingCoolingCoolingCooling
XSPC Chrome Compression Fittings EK RES X3 150 Primochill PremoFlex Advanced LRT Clear 1/2 ID EK-FC (R9 290X) 
CoolingCoolingCoolingOS
EK D5 Vario Top-X  Phobya G-Changer V2 360mm Phobya G-Changer V2 420mm Win 10 x64 Pro 
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post #7 of 7
Thx for reping me up
A free-give away found after creeping and crawling in the docu:
Hyper-Threading Technology (HT Technology) is especially effective when each thread performs different types of operations and when there are under-utilized resources on the processor. However, Intel MKL fits neither of these criteria because the threaded portions of the library execute at high efficiencies using most of the available resources and perform identical operations on each thread. You may obtain higher performance by disabling HT Technology.

If you run with HT enabled, performance may be especially impacted if you run on fewer threads than physical cores. Moreover, if, for example, there are two threads to every physical core, the thread scheduler may assign two threads to some cores and ignore the other cores altogether
__________________________________________________ _

It funny! If you are bored (which i`m not) look in the docu. They wrote so much.
I`m really happy that i just have to click on the IBT.exe and don`t have to understand all the wicked stuff that is going on under the hood
Plus considering all the things going on that are explained in the docu it`s no wonder that the CPU gets hot.
/* Redemption*/
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I7 3930K Asus Sabertooth Asus GTX 680 8x4GB G.Skill@1337MHz 
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2xM4 64GB/ / F3 - 1TB / 2x2TB Baracudas some LG Modified EK 360 HFX 2x(Win7 x64) 
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SyncMaster P2770HD and SyncMaster 940NW Roccat Isku Corsair Gold AX750 NZXT 810 Switch 
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Rocat Kone[+] Razer exactmat X 
  hide details  
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/* Redemption*/
(14 items)
 
  
CPUMotherboardGraphicsRAM
I7 3930K Asus Sabertooth Asus GTX 680 8x4GB G.Skill@1337MHz 
Hard DriveOptical DriveCoolingOS
2xM4 64GB/ / F3 - 1TB / 2x2TB Baracudas some LG Modified EK 360 HFX 2x(Win7 x64) 
MonitorKeyboardPowerCase
SyncMaster P2770HD and SyncMaster 940NW Roccat Isku Corsair Gold AX750 NZXT 810 Switch 
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Rocat Kone[+] Razer exactmat X 
  hide details  
Reply
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