Overclock.net › Forums › Intel › Intel CPUs › i7 HT ON vs OFF Benchmarks
New Posts  All Forums:Forum Nav:

i7 HT ON vs OFF Benchmarks

post #1 of 12
Thread Starter 
So I'm bored and don't have much to do the next couple of days. I was searching around lately to find some info about HT on vs off on the i7 processors. Lots of the info I found was right after release and I was curious how everything looked now, after updates and everything...

I'm looking to do tests on how all cores (physical, and logical) perform in different scenarios to find out out for myself and others what is better. HT on, or HT off and slightly higher clock.

Right now I am performing Fritz Chess Benchmarks on individual cores, then I will mix it up with combinations. Later I plan on doing some Vantage runs.

I use task manager to set affinity to cores of my choosing and make sure logical cores aren't being used when physical ones should be, etc.

I'm using Windows 7 as an os.

Any other tests or suggestions anyone thinks of I will be happy to do.

TESTS

Fritz Chess


Some quick results there.

For physical cores when HT is on or off it doesn't make much of a difference. It also makes no difference if a core has the PHYSICAL or LOGICAL core stressed.

However, if BOTH physical and logical cores are stressed neither performs nearly as well when the SAME data is being calculated. (This may change if each core runs a different type of program and different instruction sets)

Still, with HT on you see a TOTAL improvement of 25-30% on each core.

Started working on Crysis CPU test with HT OFF clocked at 4.33GHz.


I did the benchmark on 1,2,3 and all 4 cores and the FPS made a HUGE jump from when just one core could be used. (HUGE bottleneck) Then very small improvements after more than one core could be accessed.

Something to note here:
I used Orthos stress test to *simulate* an intensive program running on a core. I chose this because it uses a core to 100%, but it doesn't COMPLETELY steal all of its resources.

Note how when I had three instances of it running the FPS went UP. I was watching core usage during the test and noticed all 4 processors were utilized 100%. (the three Orthos and the one without a *dedicated* process)

BUT! Even though FPS went up there was a noticeable degradation in *playing experience*. Crysis was stealing cycles from cores with 100% utilization already, this made things slightly choppy. Most of all objects would jump to where they were supposed to end up without actually moving smoothly all the way.

This just proves that sometimes even though you see number improvements or shortfalls they don't always matter, playability went down even though FPS went up.

Starting with some game graphs...

L4D for starters.

First is the graph for FPS improvements for 1,2,3,4 cores used.

NOTE: Often people ran into big problems because as seen above, when a physical core and its logical core are used together the performance would be poor on both cores, but in TOTAL 25-30% higher. Its like this:

If [0 - 1] [2 - 3] [4 - 5] [6 - 7] is used it will use FOUR physical cores to full potential.

If [0 -1] [2 - 3] [ 4 - 5] [6 - 7] is used, performance will be only ~64% of what the above can achieve.

ANYWAY: L4D solves this problem! It WILL NOT use a logical core. It just won't. It will ALWAYS pick the physical cores to use. (this is why my graph only shows 1-4 cores even though HT is on, I couldn't use logical ones.)

Well here is the picture, look for yourself and see what you get...


Next we have a graph showing the effects of having other programs running while gaming. This could be converting files, encrypting, scanning for viruses, spyware, burning a DVD, playing a HD movie on another screen, WHATEVER. Check out how well an i7 with HT can handle MANY HEAVY processes running at once...

Note: I switched to using IBT for *other processes* because it was a little easier to use and provided a heavier processes not letting my tests interfere as much...


Edited by Finny - 8/25/09 at 9:51pm
The acrylic beast
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 920 C0 @ 4.2 GHZ 1.46v HT on Biostar T-Power x58 XFX 5850 coming 6GB micron (Cellshock) 
Hard DriveOptical DriveOSMonitor
Intel X25-M 120 & Samsung F3 1TB DVD+-RW Windows 7 Professional Dell 24" 1200*1920 
KeyboardPowerCaseMouse
Blue G15 (R1) Antec Quattro 850w Custom Acrylic Case Razer Deathadder 
Mouse Pad
Generic 
  hide details  
Reply
The acrylic beast
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 920 C0 @ 4.2 GHZ 1.46v HT on Biostar T-Power x58 XFX 5850 coming 6GB micron (Cellshock) 
Hard DriveOptical DriveOSMonitor
Intel X25-M 120 & Samsung F3 1TB DVD+-RW Windows 7 Professional Dell 24" 1200*1920 
KeyboardPowerCaseMouse
Blue G15 (R1) Antec Quattro 850w Custom Acrylic Case Razer Deathadder 
Mouse Pad
Generic 
  hide details  
Reply
post #2 of 12
Pick a suite of benchmarks similar to those used by testers on HardOCP or the like and try out the HT vs no HT situations and see what you get.
G3258 System
(11 items)
 
HTPC
(9 items)
 
HP dv6 laptop
(13 items)
 
CPUMotherboardGraphicsRAM
Pentium Dual Core G3258 ASRock Z97 Extreme4 XFX Radeon 7950 16 GB DDR3-1600 
Hard DriveOptical DriveCoolingOS
Intel 530 SSD LG HL-DT-ST BluRay Drive Cooler Master Hyper 212 EVO Windows 7 
MonitorPowerCase
ASUS PA248Q XFX 850W Black Edition XXX Fractal Design Arc Midi 2 
CPUMotherboardGraphicsRAM
Pentium Dual Core E6700 MSI G41M-P33 Combo ATI HD4350 Kingston ValueRAM DDR3-1333 
RAMHard DriveOSMonitor
Kingston ValueRAM DDR3-1333 WD Caviar Blue Windows 7 64-bit Sony 32" TV set 
Case
Apex TX-381 
CPUGraphicsRAMHard Drive
Core i5 430M GT230M (1 Gb dedicated) 8 GB DDR3-1066 640 GB 
OSMonitor
Windows 7 Home Premium (64-bit) 15.6" 
  hide details  
Reply
G3258 System
(11 items)
 
HTPC
(9 items)
 
HP dv6 laptop
(13 items)
 
CPUMotherboardGraphicsRAM
Pentium Dual Core G3258 ASRock Z97 Extreme4 XFX Radeon 7950 16 GB DDR3-1600 
Hard DriveOptical DriveCoolingOS
Intel 530 SSD LG HL-DT-ST BluRay Drive Cooler Master Hyper 212 EVO Windows 7 
MonitorPowerCase
ASUS PA248Q XFX 850W Black Edition XXX Fractal Design Arc Midi 2 
CPUMotherboardGraphicsRAM
Pentium Dual Core E6700 MSI G41M-P33 Combo ATI HD4350 Kingston ValueRAM DDR3-1333 
RAMHard DriveOSMonitor
Kingston ValueRAM DDR3-1333 WD Caviar Blue Windows 7 64-bit Sony 32" TV set 
Case
Apex TX-381 
CPUGraphicsRAMHard Drive
Core i5 430M GT230M (1 Gb dedicated) 8 GB DDR3-1066 640 GB 
OSMonitor
Windows 7 Home Premium (64-bit) 15.6" 
  hide details  
Reply
post #3 of 12
Umm, this is a GREAT idea, will be looking forward to your test results
Little Avenger
(16 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5 2500K Asus P8P67-M EVGA GTX 670 2GB  Corsair Vengeance 1600MHz (2x4GB) 
Hard DriveHard DriveCoolingOS
120GB Samsung 840 EVO WD Black 320GB Xigmatek Dark Knight Hawk Edition P/P Windows 8 Professional x64 
MonitorKeyboardPowerCase
Asus VS247H-P x2 Cooler Master Quickfire Stealth Corsair TX650W BitFenix Raider 
MouseMouse PadAudioOther
CoolerMaster Recon SteelSeries Qck Mini Creative Recon 3D Sennheiser PC350 
  hide details  
Reply
Little Avenger
(16 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5 2500K Asus P8P67-M EVGA GTX 670 2GB  Corsair Vengeance 1600MHz (2x4GB) 
Hard DriveHard DriveCoolingOS
120GB Samsung 840 EVO WD Black 320GB Xigmatek Dark Knight Hawk Edition P/P Windows 8 Professional x64 
MonitorKeyboardPowerCase
Asus VS247H-P x2 Cooler Master Quickfire Stealth Corsair TX650W BitFenix Raider 
MouseMouse PadAudioOther
CoolerMaster Recon SteelSeries Qck Mini Creative Recon 3D Sennheiser PC350 
  hide details  
Reply
post #4 of 12
Thread Starter 
Updated some... Done for the night though, will do some more tomorrow.
The acrylic beast
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 920 C0 @ 4.2 GHZ 1.46v HT on Biostar T-Power x58 XFX 5850 coming 6GB micron (Cellshock) 
Hard DriveOptical DriveOSMonitor
Intel X25-M 120 & Samsung F3 1TB DVD+-RW Windows 7 Professional Dell 24" 1200*1920 
KeyboardPowerCaseMouse
Blue G15 (R1) Antec Quattro 850w Custom Acrylic Case Razer Deathadder 
Mouse Pad
Generic 
  hide details  
Reply
The acrylic beast
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 920 C0 @ 4.2 GHZ 1.46v HT on Biostar T-Power x58 XFX 5850 coming 6GB micron (Cellshock) 
Hard DriveOptical DriveOSMonitor
Intel X25-M 120 & Samsung F3 1TB DVD+-RW Windows 7 Professional Dell 24" 1200*1920 
KeyboardPowerCaseMouse
Blue G15 (R1) Antec Quattro 850w Custom Acrylic Case Razer Deathadder 
Mouse Pad
Generic 
  hide details  
Reply
post #5 of 12
not bad, 25-30% pretty decent improvement.
Gets The Job Done
(14 items)
 
  
CPUMotherboardGraphicsRAM
i7 950 Asus SabreTooth GTX 760 6gb Ripjaw 
Hard DriveCoolingOSMonitor
m4 128GB RAID 0, Spinpoint F3 1TB Raid 0 Megahalems(Lapped) w/ Xigmatek Push/Pull Windows 7 x64 SAMSUNG P2770HD 
KeyboardPowerCaseMouse
Steelseries 6gv2 Antec High Current Pro 750 Lian-li Lancool PC-k62 Steelseries Xai, Logitech g5 
Mouse PadAudio
Steelseries Qck Mass Xonar DX, AD700s, HA-RX900s, Logitech g930 
  hide details  
Reply
Gets The Job Done
(14 items)
 
  
CPUMotherboardGraphicsRAM
i7 950 Asus SabreTooth GTX 760 6gb Ripjaw 
Hard DriveCoolingOSMonitor
m4 128GB RAID 0, Spinpoint F3 1TB Raid 0 Megahalems(Lapped) w/ Xigmatek Push/Pull Windows 7 x64 SAMSUNG P2770HD 
KeyboardPowerCaseMouse
Steelseries 6gv2 Antec High Current Pro 750 Lian-li Lancool PC-k62 Steelseries Xai, Logitech g5 
Mouse PadAudio
Steelseries Qck Mass Xonar DX, AD700s, HA-RX900s, Logitech g930 
  hide details  
Reply
post #6 of 12
Thanks for the work. I know these things can be tedious to do, and you've obviously spent some time doing it. Thanks for sharing. +REP.
My Setups
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7-920(2), i7-950, i7-875K, i3-540(3), 1055T Asus, Gigabyte GTX460(4), 5770(4), GTX260, 9800GT(2) 48GB DDR3 1600s 
Hard DriveOSMonitorPower
20TB SATA2 Windows 7 64Bit Ultimate LG 32"(2), Acer 24"(2) Dell 30", LG 47" 6500W Antec, CoolerMaster, Silverstone, Corsair 
Case
CM(2), Antec(3), Corsair, LianLi 
  hide details  
Reply
My Setups
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7-920(2), i7-950, i7-875K, i3-540(3), 1055T Asus, Gigabyte GTX460(4), 5770(4), GTX260, 9800GT(2) 48GB DDR3 1600s 
Hard DriveOSMonitorPower
20TB SATA2 Windows 7 64Bit Ultimate LG 32"(2), Acer 24"(2) Dell 30", LG 47" 6500W Antec, CoolerMaster, Silverstone, Corsair 
Case
CM(2), Antec(3), Corsair, LianLi 
  hide details  
Reply
post #7 of 12
Thread Starter 
Meh, its not taking much time.

From now on tests will be done with max overclocks on both HT and none. AND with clock for clock comparisons.

Max clocks will be:

4.16GHz HT on
4.35GHz HT off

I'll see if I can get some Vantage runs done this afternoon.

They will be run on entry settings to bring out CPU limitation because I only have an 8800gt at the moment.
The acrylic beast
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 920 C0 @ 4.2 GHZ 1.46v HT on Biostar T-Power x58 XFX 5850 coming 6GB micron (Cellshock) 
Hard DriveOptical DriveOSMonitor
Intel X25-M 120 & Samsung F3 1TB DVD+-RW Windows 7 Professional Dell 24" 1200*1920 
KeyboardPowerCaseMouse
Blue G15 (R1) Antec Quattro 850w Custom Acrylic Case Razer Deathadder 
Mouse Pad
Generic 
  hide details  
Reply
The acrylic beast
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 920 C0 @ 4.2 GHZ 1.46v HT on Biostar T-Power x58 XFX 5850 coming 6GB micron (Cellshock) 
Hard DriveOptical DriveOSMonitor
Intel X25-M 120 & Samsung F3 1TB DVD+-RW Windows 7 Professional Dell 24" 1200*1920 
KeyboardPowerCaseMouse
Blue G15 (R1) Antec Quattro 850w Custom Acrylic Case Razer Deathadder 
Mouse Pad
Generic 
  hide details  
Reply
post #8 of 12
Thread Starter 
Updated with a little bit of Crysis. I will do more this evening.

Thanks for the rep GoHigh.
The acrylic beast
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 920 C0 @ 4.2 GHZ 1.46v HT on Biostar T-Power x58 XFX 5850 coming 6GB micron (Cellshock) 
Hard DriveOptical DriveOSMonitor
Intel X25-M 120 & Samsung F3 1TB DVD+-RW Windows 7 Professional Dell 24" 1200*1920 
KeyboardPowerCaseMouse
Blue G15 (R1) Antec Quattro 850w Custom Acrylic Case Razer Deathadder 
Mouse Pad
Generic 
  hide details  
Reply
The acrylic beast
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 920 C0 @ 4.2 GHZ 1.46v HT on Biostar T-Power x58 XFX 5850 coming 6GB micron (Cellshock) 
Hard DriveOptical DriveOSMonitor
Intel X25-M 120 & Samsung F3 1TB DVD+-RW Windows 7 Professional Dell 24" 1200*1920 
KeyboardPowerCaseMouse
Blue G15 (R1) Antec Quattro 850w Custom Acrylic Case Razer Deathadder 
Mouse Pad
Generic 
  hide details  
Reply
post #9 of 12
Thread Starter 
Updated!!! I've been working on L4D, Crysis, a little Far Cry 2, and Vantage for 5 hours...

I got L4D completely done though! Hopefully more tomorrow night. (school starts to that ruins EVERYTHING)
The acrylic beast
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 920 C0 @ 4.2 GHZ 1.46v HT on Biostar T-Power x58 XFX 5850 coming 6GB micron (Cellshock) 
Hard DriveOptical DriveOSMonitor
Intel X25-M 120 & Samsung F3 1TB DVD+-RW Windows 7 Professional Dell 24" 1200*1920 
KeyboardPowerCaseMouse
Blue G15 (R1) Antec Quattro 850w Custom Acrylic Case Razer Deathadder 
Mouse Pad
Generic 
  hide details  
Reply
The acrylic beast
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 920 C0 @ 4.2 GHZ 1.46v HT on Biostar T-Power x58 XFX 5850 coming 6GB micron (Cellshock) 
Hard DriveOptical DriveOSMonitor
Intel X25-M 120 & Samsung F3 1TB DVD+-RW Windows 7 Professional Dell 24" 1200*1920 
KeyboardPowerCaseMouse
Blue G15 (R1) Antec Quattro 850w Custom Acrylic Case Razer Deathadder 
Mouse Pad
Generic 
  hide details  
Reply
post #10 of 12
Looking good so far.

Results seem to support what I've been seeing myself. HT helps a lot more than it hurts.
Primary
(15 items)
 
  
CPUMotherboardGraphicsRAM
5820k @ 4.2/4.1GHz core/uncore, 1.245v Gigabyte X99 SOC Champion (F4j) Sapphire R9 290X Tri-X UEFI @ 1100/1500 4x4GiB Crucial @ 2667, 12-12-12-28-T1, 1.35v 
Hard DriveHard DriveHard DriveCooling
Plextor M6e 128GB (fw 1.05) M.2 (PCI-E 2.0 2x) 2x Crucial M4 256GB 4x WD Scorpio Black 500GB Cooler Master Nepton 280L 
OSMonitorKeyboardPower
Windows Server 2008 R2 SP1 BenQ BL3200PT Filco Majestouch Tenkeyless (MX Brown) Seasonic SS-860XP2 
CaseMouseAudio
Fractal Design Define R4 CM Storm Spawn Realtek ALC1150 + M-Audio AV40 
  hide details  
Reply
Primary
(15 items)
 
  
CPUMotherboardGraphicsRAM
5820k @ 4.2/4.1GHz core/uncore, 1.245v Gigabyte X99 SOC Champion (F4j) Sapphire R9 290X Tri-X UEFI @ 1100/1500 4x4GiB Crucial @ 2667, 12-12-12-28-T1, 1.35v 
Hard DriveHard DriveHard DriveCooling
Plextor M6e 128GB (fw 1.05) M.2 (PCI-E 2.0 2x) 2x Crucial M4 256GB 4x WD Scorpio Black 500GB Cooler Master Nepton 280L 
OSMonitorKeyboardPower
Windows Server 2008 R2 SP1 BenQ BL3200PT Filco Majestouch Tenkeyless (MX Brown) Seasonic SS-860XP2 
CaseMouseAudio
Fractal Design Define R4 CM Storm Spawn Realtek ALC1150 + M-Audio AV40 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Intel CPUs
Overclock.net › Forums › Intel › Intel CPUs › i7 HT ON vs OFF Benchmarks