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How to run LinPack stress test(LinX/IBT)properly-an explanation(maybe a guide) - Page 7

post #61 of 128
Quote:
Originally Posted by PERSPOLIS View Post
@ [Adz]

IF possible,run Everest Cache And Memory Benchmark & report your read & write values.
Also post a screenshot of motherboard-chipset page in Everest if you can.
My system is down at the moment for non-routine maintenance (read: i messed something up), so as I'll probably get that done tomorrow and post back.
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post #62 of 128
Perspolis,
I running a quad with nvidia 750i chipset. you mention in your second post that my combination can be causing me my performance issues.

My Cache and Mem Benchmark is
Memory:
Read:8145 MB/s
Write:5746
Copy:6021
Latency 65.9ns

L1 Cache:
Read:50772
Write:50649
Copy:6021
Latency .9ns

L2 Cache:
Read:22932
Write:18036
Copy:25517
Latency 4.4.ns

Here is my chipset info
North Bridge: nVIDIA nForce 750i SLI (C72P) ]

North Bridge Properties:
North Bridge nVIDIA nForce 750i SLI (C72P)
Supported FSB Speeds FSB533, FSB800, FSB1066, FSB1333
Supported Memory Types DDR2-400 SDRAM, DDR2-533 SDRAM, DDR2-667 SDRAM, DDR2-800 SDRAM
Revision A2
Package Type FC-PBGA
Package Size 3.3 cm x 3.3 cm
Process Technology 90 nm
Core Voltage 1.25 V
nVIDIA SLI Supported
nVIDIA Hybrid SLI Not Supported

Memory Controller:
Type Dual Channel (128-bit)
Active Mode Dual Channel (128-bit)

Memory Timings:
CAS Latency (CL) 5T
RAS To CAS Delay (tRCD) 5T
RAS Precharge (tRP) 5T
RAS Active Time (tRAS) 18T
Row Cycle Time (tRC) 22T
Row Refresh Cycle Time (tRFC) 43T
Command Rate (CR) 2T
RAS To RAS Delay (tRRD) 4T
Write Recovery Time (tWR) 6T
Read To Write Delay (tRTW) 5T
Write To Read Delay (tWTR) 10T
Read To Precharge Delay (tRTP) 4T
Write To Precharge Delay (tWTP) 12T
Read Delay (tRD) 7T
Write Delay (tWD) 4T
Four Activate Window Delay (tFAW) 18T
Additive Latency (tAL) 0T
CKE Min. Pulse Width (tCKE) 3T

Memory Slots:
DRAM Slot #1 2 GB (DDR2-800 DDR2 SDRAM)
DRAM Slot #2 2 GB (DDR2-800 DDR2 SDRAM)

PCI Express Controller:
PCI-E 1.0 x16 port #0 In Use @ x16 (nVIDIA nForce 200 (BR04) 24-Lane PCI Express 2.0 Switch --> nVIDIA nForce 200 (BR04) 24-Lane PCI Express 2.0 Switch, nVIDIA nForce 200 (BR04) 24-Lane PCI Express 2.0 Switch --> ATI Cypress - High Definition Audio Controller, ATI Radeon HD 5850 1GB GD)

Clock Generator:
CPU FSB 25.8 MHz
PCI Express 100.0 MHz

You mention Nvidia Tweaks. What may those be????
    
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post #63 of 128
Well, I linked and synced my ram vs unlinked and gained 3 Gflops. Still not the 18 I was looking for /
    
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post #64 of 128
Took my CPU up to 2.8GHz and changed FSB : DRAM to 3:5

Went from 35.25GFlops at 2.76GHz
to 34.44 GFlops at 2.8GHz

However, the old DRAM frequency was faster, does it affect GFlop that much?
     
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post #65 of 128
nm. sorry.
Edited by andydviking - 5/6/10 at 5:55pm
post #66 of 128
Greetings everybody,

first of all thank you Perspolis for the technical guidelines regarding LinX, very much needed & appreciated.

I'm relatively new to the i7 platform (72 hours) and besides all the benchmarks & reviews I've seen here or anywhere else, I find JimmyHart84's to be quite remarkable (in terms of temperature, temperature delta, etc..).

I'm talking about this :

I've a similar configuration (4.2 GHz) but with totally different temps.

In other words Jimmy, care to share with me & others the data behind that configuration of yours ?

I'd personally first be interested in ambient temperature at the time of that particular result, number of fans and their RPMs.

Thank you in advance,

K
post #67 of 128
Up ?

P.S.

Was HyperThreading enabled during your test ?
post #68 of 128
Hi Kargeras. HT was not enabled and it still isn't now after the overclock. I basically followed this guide to do the OC - http://www.overclock.net/intel-cpus/...920-930-a.html

I took me quite some time, as I was increasing the various voltages 1 step at a time, to be as accurate as possible.

After I finished, I re-enabled EIST and C1E.

Case fans I have 2 120mm intakes on the front, 1 120mm intake on the side, 1 120mm out on the rear and 1 140mm out on the top. The 3 ins are running at full speed (as they are low noise fans) and the 2 outs came with the case and have a switch for low, medium or high speed. These are running at low, whatever speed that is, as medium or high is far too loud.

For the heatsink, I have a 120mm fan either side, both moving the air in the same direction so the air flow goes right through the heatsink. As the heatsink is obviously horizontal when the case is upright, the fans move the air upwards, so the air pretty much goes through the heatsink and out through the 140mm top fan.

Also, not sure what the ambient temps were, but today it's pretty sunny, but I have the windows open and they are 4 degrees higher than those. So in a warm room, maybe add 5 or 6 more possibly?
Edited by JimmyHart84 - 5/9/10 at 7:54am
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post #69 of 128
Greetings Jimmy and thank you for answer.

I'm still in testing momentarily.

From your description our setups are quite similar which very much helps me into determining the right parameters (as people ALWAYS forget to mention ambient temperature, humidity, number of fans, average RPM per fan, window(s) opened, case closed/open, air conditioning etc...) for a stable config, Ghz & Temperature wise.

I had already figured that HT was OFF in your configuration, judging after your LinX results and therefore turned it off myself in order to see/check the severe temperature drop (10 degrees celsius) and of course the added performance (around 9-10 Gigaflops, screens will come soon).

I see you're using Megahalems with 2x120 fans in Push-Pull configuration, "fueled" by MX2 thermal compound.This makes another useful coincidence for me, the only difference being that I'm using MX3

You're previous post was written on the 13th of February so I reckon the temps were a bit different, especially with a window open.
Hence summer is here, would you be so kind as to redo a LinX simulation for me in exactly the same conditions you use your computer for daily use ?
The data I'd look after would be : ambient temperature (+- humidity), voltages (taken from BIOS CPU, PLL, QPI), RPMs on both fans sitting on the CPU cooler @ LinX - 8 threads - 10 passes and a note about the PageFile (enabled/disabled).A screen with RealTemp & CPUz would also count.

I know I'm asking for much but it would very much help me into starting to use my rig instead of blindingly walking in ... shade

I will of course also publish my results (Prime95, LinX, MemTest) with extensive details as soon as I'm done (in about 3 days or so, depending on how soon your reply comes).

Thank you for your understanding,

K


P.S.

I noticed your delta between min.temp core and max. temp core is 5(idle) to 6 (full load) degrees, yet another perfect fit with what I'm having.
Could you please tell if that delta increased or decreased over time ?
I myself am annoyed of this gap and I'm seriously thinking of reapplying my TIM in order to obtain a max. of 2-3 delta between any 2 cores but this all depends on your answer.
A 8-10 degrees Celsius delta in 6 months would seriously piss me off
post #70 of 128
Well when I run linx to obtain that screenshot, I had C1E and EIST switched off, so when testing my overclock, I didn't have the exact settings that I currently have in my day to day running of the computer. So if I run linx now, the results would be different even if the environment conditions were exactly the same, so I'm not sure how much use this would be to you?

Also, what do you mean by delta changes?
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