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Drop of Gflops(even at stock speeds!) in 2500k under linx/ibt

post #1 of 17
Thread Starter 
spec:
Asrock P67 Pro3
i5 2500k
2Gx2 Kingston KVR1333D3S8N9
Air cooler:212 plus
Bios: all default
windows 7 service pack1

I am trying to run Linx at stock speed. The Gflops starts at 85Gflops, after a few runs it drops steady and then stable at about 69flops.
I have tried to disable the speedstep/ C1E, thermal protection, also running it at safe mode but it doesn't help!mad.gif
And I find out that my Gflops will drop to 69ish no matter what my clock is (e.g.4.5Ghz)
I can also see the max temperature during the low Gflops is a few degree(about 3-5) lower than the normal Gflops.
According to cpuz my clock speed didn't go down during the Gflops drop.
Is there any problem with my cpu/motherboard?
Thank you very much:)
Edited by cakemush - 7/31/11 at 8:22pm
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CPUMotherboardGraphicsRAM
i5 2500k AsRock P67 Pro3 GTX560 2Gx2 Kingston KVR1333D3S8N9 
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post #2 of 17
This has happened to me before. I was able to solve it by upping my vcore a small amount. But this was with an i7 970 on an EVGA X58 board. But it's worth a shot
post #3 of 17
Thread Starter 
Quote:
Originally Posted by willdearborn;14419723 
This has happened to me before. I was able to solve it by upping my vcore a small amount. But this was with an i7 970 on an EVGA X58 board. But it's worth a shot

Thanks for reply. Unfortunately, wither lower or raising the vcore solves my problem. frown.gif
do you think i could call the warranty for this matter?(since it can't mantain the Gflops at stock speed
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
i5 2500k AsRock P67 Pro3 GTX560 2Gx2 Kingston KVR1333D3S8N9 
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Seagate 500GB Windows 7 Sp1 Cosair GS600 
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CPUMotherboardGraphicsRAM
i5 2500k AsRock P67 Pro3 GTX560 2Gx2 Kingston KVR1333D3S8N9 
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Seagate 500GB Windows 7 Sp1 Cosair GS600 
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post #4 of 17
Are you positive no other services or programs are using the resources? I had the same issue so I completely killed everything from starting up when entering the OS. What is you cinebench 11.5 cpu score?
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Samsung 840 Plextor Windows 8.1 Asus PB287q 4K 
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post #5 of 17
Why is everybody stressing about GFLOPS? It makes very little sense. It is not a very good representation of how fast your CPU really is because most of a CPU's workload is integer based math not floating point.

TLDR; It doesn't matter!
Main Rig
(21 items)
 
Home Theater PC
(12 items)
 
 
CPUMotherboardGraphicsGraphics
i7 3930k Asus P9X79 Pro XFX Radeon HD 6870 XFX Radeon HD 6870 
RAMHard DriveHard DriveOptical Drive
4x4GB DDR3 1600 Corsair Vengeance Series Seagate 1.5TB 7200rpm Western Digital Caviar Blue 500GB 7200rpm Asus Optical Drive 
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XSPC Raystorm Waterblock Black Primochill Tubing 1/2" ID / 3/4" OD XSPC RX240 XSPC Dual Bay Reservoir 
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Swiftech MCP655 Windows 7 Ultimate 64 bit Dell U2410 Das Model S Cherry MX Blue 
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Corsair TX850 NZXT Phantom Gigabyte M8000X Razer Goliathus 
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Logitech X540 
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AMD Athlon 64 X2 5200+ GA-MA78LM-S2H AMD 760G (Microsoft Corporation WDDM 1.1)  PNY Electronics  
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Main Rig
(21 items)
 
Home Theater PC
(12 items)
 
 
CPUMotherboardGraphicsGraphics
i7 3930k Asus P9X79 Pro XFX Radeon HD 6870 XFX Radeon HD 6870 
RAMHard DriveHard DriveOptical Drive
4x4GB DDR3 1600 Corsair Vengeance Series Seagate 1.5TB 7200rpm Western Digital Caviar Blue 500GB 7200rpm Asus Optical Drive 
CoolingCoolingCoolingCooling
XSPC Raystorm Waterblock Black Primochill Tubing 1/2" ID / 3/4" OD XSPC RX240 XSPC Dual Bay Reservoir 
CoolingOSMonitorKeyboard
Swiftech MCP655 Windows 7 Ultimate 64 bit Dell U2410 Das Model S Cherry MX Blue 
PowerCaseMouseMouse Pad
Corsair TX850 NZXT Phantom Gigabyte M8000X Razer Goliathus 
Audio
Logitech X540 
CPUMotherboardGraphicsRAM
AMD Athlon 64 X2 5200+ GA-MA78LM-S2H AMD 760G (Microsoft Corporation WDDM 1.1)  PNY Electronics  
RAMHard DriveOptical DriveCooling
PNY Electronics  Western Digital Caviar Blue Basic DVD Multi Recorder Stock 
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post #6 of 17
Thread Starter 
Quote:
Originally Posted by dbxuau;14421054 
Are you positive no other services or programs are using the resources? I had the same issue so I completely killed everything from starting up when entering the OS. What is you cinebench 11.5 cpu score?

Thanks for reply. I have tried killing everything and monitor the test with task manager. However, the Gflops still drops with nothing weird in the task manager.
My cinebench score is like 5.28 to 5.41.
I wonder if the cinebench stress the cpu enough since after a run cinebench then the linx Gflops becomes 85Gflops again. (if course drop again after few runs!)
Note: My linx Gflops will jump back to normal 85Gflops if i did not stress the cpu for a few minutes(e.g. idle/surfing the web)
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
i5 2500k AsRock P67 Pro3 GTX560 2Gx2 Kingston KVR1333D3S8N9 
Hard DriveOSPower
Seagate 500GB Windows 7 Sp1 Cosair GS600 
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
i5 2500k AsRock P67 Pro3 GTX560 2Gx2 Kingston KVR1333D3S8N9 
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post #7 of 17
Thread Starter 
Quote:
Originally Posted by Airolden;14421494 
Why is everybody stressing about GFLOPS? It makes very little sense. It is not a very good representation of how fast your CPU really is because most of a CPU's workload is integer based math not floating point.

TLDR; It doesn't matter!

The crux is everyone could run the Linx in stable Gflops and I have invested quite a bit more for the 2500k alone! (cpu, p67 instead of h61, cpu cooler)
I can't accept that it perform worse than a normal i5 2400.
I mean i5 2400 since when running at all default bios I can see my cpu clock is just 3392mhz instead of 3700mhz.
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
i5 2500k AsRock P67 Pro3 GTX560 2Gx2 Kingston KVR1333D3S8N9 
Hard DriveOSPower
Seagate 500GB Windows 7 Sp1 Cosair GS600 
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
i5 2500k AsRock P67 Pro3 GTX560 2Gx2 Kingston KVR1333D3S8N9 
Hard DriveOSPower
Seagate 500GB Windows 7 Sp1 Cosair GS600 
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post #8 of 17
At stock speeds with turboboost, my 2600k was getting 80-90 something Gflops at 3.8 ghz... so if you're getting 69+, thats satisfactory. Mine drops too some times, some times it goes up, some times I bsod... lol.

5.28-5.41 in cinebench. well crud, imagine that...

chart11.jpg

Get some sleep mang.
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2600K Gigabyte Z68X-UD3H-B3 GIGABYTE 970 GTX 16GB DDR3 1600 Corsair Vengeance 9-9-9-24 
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Samsung 840 Plextor Windows 8.1 Asus PB287q 4K 
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post #9 of 17
Set core current limit and turbo boost limits higher. CPU-Z may not show throttling because multiplier may drop for so little time that the program doesn't notice it.
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Core i7-2600K @ 4.5 GHz w/ 1.4 V Gigabyte GA-P67A-UD3P-B3 MSI GTX 570 Twin Frozr III PE TeamGroup 1333 Mhz CL9 2x4 
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post #10 of 17
Quote:
Originally Posted by Alepale;14422833 
Set core current limit and turbo boost limits higher. CPU-Z may not show throttling because multiplier may drop for so little time that the program doesn't notice it.

Yes. Manually put the value of "255" to all 3 current limits.
Also when you see the GFlops moves around, or decrease especially when you test higher RAM value, it either needs more vcore, more VCCIO(VTT), or the RAM is not working right. (May need more dram voltage even at stock timings)
Have you tested your all RAM with memtest before?
Or runPrime95 with 90+% of available RAM?
i5 2500K GTX570HD
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i5 2500K @ 4.8GHz 1.384V AsRock P67 Extreme4 (B3) UEFI3.19 EVGA GTX 570HD SC 930/1950 G.Skill RipjawsX DDR3 PC12800 2x4GB@1866 9-10-9-28 
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i5 2500K GTX570HD
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Crucial M4 SSD 128GB, 1x 500GB WD, 2x1TB WD Samsung DL DVD Writer Noctua NH-D14 Windows 7 Ultimate 64Bit SP1 
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