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post #71 of 78
Not sure, but I think that test still reflected your correct score


Quote:
Originally Posted by ryan w View Post


uh oh what the heck does that mean
    
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post #72 of 78
Quote:
Originally Posted by SeanWebster View Post
Try it if you like, I don't think you can beat my 35,964.80MB/s
Also try to not go over 1.65v
There's no way I can beat those scores, that's a 75% increase in performance.

EDIT: I lol'd at the letters in a word thing in your sig, and it was pretty easy to read, that's interesting.
    
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post #73 of 78
Quote:
Originally Posted by snelan View Post
Not sure, but I think that test still reflected your correct score
well i reckon its all about # of cores and time stamps but thats the first my computer has told me WARNING! ha...found this in a google search nothing else really comes up....

The RDTSC instruction has, until recently, been an excellent high-resolution, low-overhead way of getting CPU timing information. With the advent of multi-core/hyperthreaded CPUs, systems with multiple CPUs, and "hibernating" operating systems, RDTSC often no longer provides reliable results. The issue has two components: rate of tick and whether all cores (processors) have identical values in their time-keeping registers. There is no longer any promise that the timestamp counters of multiple CPUs on a single motherboard will be synchronized. So, you can no longer get reliable timestamp values unless you lock your program to using a single CPU. Even then, the CPU speed may change due to power-saving measures taken by the OS or BIOS, or the system may be hibernated and later resumed (resetting the time stamp counter).

I might be understanding this wrong but... Basically both RDTSC and QPC are used to time code in time-sensitive programs. However, RDTSC might be inaccurate in above described situations. I also might be wrong about this but I believe QPC has something to do with the HPET high precision event timer. Which is a more accurate timer.

Reliance on the time stamp counter also reduces portability, as other processors may not have a similar feature. Recent Intel processors include a constant rate TSC (identified by the constant_tsc flag in Linux's /proc/cpuinfo). With these processors the TSC reads at the processor's maximum rate regardless of the actual CPU running rate. While this makes time keeping more consistent, it can skew benchmarks, where a certain amount of spin-up time is spent at a lower clock rate before the OS switches the processor to the higher rate. This has the effect of making things seem like they require more processor cycles than they normally would.

Under Windows platforms, Microsoft strongly discourages using the TSC for high-resolution timing for exactly these reasons, providing instead the Windows APIs QueryPerformanceCounter and QueryPerformanceFrequency.[2] Even when using these functions, Microsoft recommends the code to be locked to a single CPU. Under Linux, similar functionality is provided by reading the value of CLOCK_MONOTONIC clock using POSIX clock_gettime function.

Starting with the Pentium Pro, Intel processors have supported out-of-order execution, where instructions are not necessarily performed in the order they appear in the executable. This can cause RDTSC to be executed later than expected, producing a misleading cycle count.[3] This problem can be solved by executing a serializing instruction, such as CPUID, to force every preceding instruction to complete before allowing the program to continue or by using RDTSCP instruction, which is a serializing variant of the RDTSC instruction (starting from Core i7)

hummmmmmmmmmm
Edited by ryan w - 6/11/11 at 9:56pm
 
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post #74 of 78
Quote:
Originally Posted by snelan View Post
I can bring my RAM to 1700 partially stable, but the OS gets pretty buggy, gonna try it. Maybe I will take the crown then.
I can bring mine to 9-11-10-27-2n@1980, and stable enough to run winsat, but I cant boot anything at 2000 or over regardless of timings but even with higher speed I still dont get much better score, so I'm at a loss as I havent messed much with ram other than setting them to stock speeds and timings so not really sure what would be a good way to get it higher:/
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post #75 of 78
Quote:
Originally Posted by smoket4279` View Post
I can bring mine to 9-11-10-27-2n@1980, and stable enough to run winsat, but I cant boot anything at 2000 or over regardless of timings but even with higher speed I still dont get much better score, so I'm at a loss as I havent messed much with ram other than setting them to stock speeds and timings so not really sure what would be a good way to get it higher:/
Pump the voltage
Pump the speed
Unpump the timings

I really miss how on my CHIV and the trusty 1090t I didn't have to worry about this 1.5V memory controller crap. I mean seriously, why can't memory controllers just be better:

2500k/2600k - The memory controller doesn't like high voltage
AMD PH II - The memory controller doesn't like lots of RAM or multiple sticks
980x/990x - the memory controller has a hard time with overclocking
    
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post #76 of 78
I tweaked it a little from the last runs. Nothing serious, just dropped my tRAS, running at 6-6-6-17-37 (1T). Bumped my NB to it's lame max of 2616 Mhz...can't wait to get a board with a better nb. :/

Good enough to crack 20K.



I'll toy around with tRC, later and see what I can pull out of her.
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post #77 of 78
Thread Starter 
My new RAM doesn't perform anywhere near as well as I'd expected/hoped. It seems to run better slightly under-clocked (1434MHz 9-9-9-24-2T) I'm only getting a little over 16000 running winsat mem which is frustrating and disappointing.



Maybe my poor little CPU is holding things back
post #78 of 78
ok i seem to get low numbers having 16gb of DDR3.. new to all this... right now i am running at 668MHZ but even at 800MHZ i only jump up to around 8800 in tests...any ideas...


Edited by Monster212 - 10/16/12 at 9:46am
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