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post #101 of 128
Ideally, it shouldn't fill half the half the memory while idling (the drop from 5258MB to ~2600MB), meaning you either have some heavy duty stuff running, or it's SuperFetch at work. See if disabling SuperFetch stabilises your RAM.
If you're not worried about temperatures, you could try running it Safe Mode which will almost always yield better performance.

But it's not too big an issue to worry about. The maximum you should ever use is the maximum free physical RAM you have, but ideally you want to be using every DIMM to ensure maximum stability. So I'd say anywhere between 4100MB and 6GB. The suggested memory of 4719MB seems perfectly fine.

I'm not aware of any particular sweet spot, though I've noticed that my GFlops output tends to be higher within a certain range of megabytes (I can't remember exactly, it's been too long since I've done it). It's just a matter of trial and error.
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post #102 of 128
Quote:
Originally Posted by [Adz] View Post
I'm not aware of any particular sweet spot, though I've noticed that my GFlops output tends to be higher within a certain range of megabytes (I can't remember exactly, it's been too long since I've done it). It's just a matter of trial and error.
Adz

Thanks. I think you have something there about the GFlops being an indication of where a memory might be slowing the performance of the system.

I'm going to have to do some testing now to see what kind of stable performance my machine has.

Thanks again.
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post #103 of 128
This might or might not belong here but being a LINPACK thread i said why not. I have noticed while stress testing with LINKPACK that my cpu usage is only 50% on all the cores any idea what would cause that? Because p95 does put 100% load across.

Thanks
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post #104 of 128
Quote:
Originally Posted by Knight2000 View Post
This might or might not belong here but being a LINPACK thread i said why not. I have noticed while stress testing with LINKPACK that my cpu usage is only 50% on all the cores any idea what would cause that? Because p95 does put 100% load across.

Thanks
Do you have HT enabled? If yes, see if disabling it makes a difference.
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post #105 of 128
Ok.. So my Specs is in the signature.

I ran LinX, while on safe mode. Haven't gone further to disable any services, but let the system idle for 15 minutes. Then ran LinX and CoreTemp. LinX shows me at 8.9+ Gflops!! By my calculations I should've had 24.

My suspicions are at my ram bottlenecking everything.
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post #106 of 128
I hope this thread is still alive...I was wondering why the first pass is so low, while 2-20 are so close? I'm oc'd to 3.8 with:
vcore:1.16875 (bios, not cpu-Z's reading)
Qpi/dram: 1.21250
IOH: 1.12
pll: 1.8
HT disabled
Pretty much I am tweaking from this http://www.overclock.net/intel-mothe...ml#post8440597

I restarted, stopped everything I could in task manager and ran Linx for 30-45sec. to free up more memory before starting. I previously ran prime95 for 24 hours w/o a hitch. I'm not sure what this indicates since there was no errors in Linx. Does this mean I'm good to go or do I need more tweaking?
LL
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post #107 of 128
Quote:
Originally Posted by Cykososhull View Post
I hope this thread is still alive...I was wondering why the first pass is so low, while 2-20 are so close? I'm oc'd to 3.8 with:
vcore:1.16875 (bios, not cpu-Z's reading)
Qpi/dram: 1.21250
IOH: 1.12
pll: 1.8
HT disabled
Pretty much I am tweaking from this http://www.overclock.net/intel-mothe...ml#post8440597

I restarted, stopped everything I could in task manager and ran Linx for 30-45sec. to free up more memory before starting. I previously ran prime95 for 24 hours w/o a hitch. I'm not sure what this indicates since there was no errors in Linx. Does this mean I'm good to go or do I need more tweaking?
It's strange you should mention this now. I was testing out a QX9650 yesterday and the same thing happened with that too - I gained about 10 GFlops after the first round.
I don't know what causes it, but you're not alone. I'm guessing it's normal.
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post #108 of 128
I kind of hate to bump an old thread, but this really helped me and I feel like it should be added to the i7 overclocking guides. +rep from me.
    
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post #109 of 128
It's not just an i7 guide though, it's a great guide regardless of chip.
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post #110 of 128
I got a lot of crap about preaching the GFLOPS gospel early in my posting career here. Nice to see some love for GFLOPS here at OCN. cool.gif

My testing methodology is very similar to what this guide outlines, and I wish I could have bumped or referred to this thread a little while back, because so many would argue that, as a benchmark, GFLOPS means nothing because "it's always different" (whatever that means, as if other benchmarks are NEVER different from test to test. rolleyes.gif ) The reality is GFLOPS are a SOLID benchmark and a very useful tool in determining stability. It's importance so often undervalued.

One of the primary tools I used in testing my OC was LinX and not only how many GFLOPS i was getting (61.5 @ 4.20 GHz HT off), but how tight the timings were in LinX runs when tweaking different voltages etc.) I found it absolutely true that the tighter your GFLOP timings were in 20 pass LinX the more stable the overclock. I have been folding 24/7 on this OC for the last month, it was very very tight on the GFLOP timings, and has turned out to be a beast folding -bigadv. It was sort of one of those moments when you are overclocking where you find the settings, and can't save the BIOS profile fast enough. biggrin.gif

I actually spent some serious time going through this thread. Good stuff in here. +1


-TG
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