Intel 4.5GHz & 5GHz LinX Stable Club

[Bullu$]

Creaking past 5400. I think this is it for me. Good fun tho

OOPS! I've just read the first post again. I hope this 4C/4T is alright.

crazy LinX speeds but why so low Gflops at that speed?

I'm at ~133GFlops at 4800 (4C 4T)

[SimpleTECH]

crazy LinX speeds but why so low Gflops at that speed?

I'm at ~133GFlops at 4800 (4C 4T)

Memory speed makes a huge difference.

[BranFB]

Yeah... memory increase HUGE Gflops in LinX!

[zoson]

Memory speed makes a huge difference.

If by 'huge' you mean 1-2 GFlops max, I agree 100%. I have run linx at 4.2GHz with memory speeds ranging from 1600 to 2000 and the difference is always very small. I have many screenshots to prove it, but I don't think this is the correct place for it. Maybe I'll make a new thread.

It certainly doesn't make 73GFlops worth of difference.

I think it's a myth that bad clockers use to excuse their poor performance.

[BranFB]

73 - not.
but a few to a dozen.

Mine in 4/8 has 17gflops difference between both!

[aznsniper911]

CPU: i7-2600k at 5.2ghz (1.53V and batch #3103B307)
Motherboard: Asus P8P67 Pro B3 (Firmware 1305)
RAM: Corsair Vengeance 2x4GB DDR3-1866
Cooling: Water

[newhit]

crazy LinX speeds but why so low Gflops at that speed?

I was just trying for my max clock. I didn't pay too much attention to my memory. I have much better memory clox at lower MHz. I asked "Zalbard" above if it was all right and he agreed so I'm good to go.

This is only an exercise into bios manipulation and cooling, not my everyday clock.

PS
Nearly forgot.........the rams in are Corsair Dominators rated at what the screen shows.

PPS
I'm not sure (yes, I'm really not sure....... as in don't know) why ppl are consentrating on the ram. I will say that the Corsair *seemed* to make the difference whether I got over 5.4 or not. Obvioiusly, the fact that I needed almost 1.7v is more the main difference although the cpu is still ok but maybe not in the long term.


Lower value..............

[Ace.]

I will test my Baby with Linx the next days

[Sanousie]

i7 970 es
Watercooled

[zoson]

Try again, this time using all of your memory channels... lol.
You should also be over 95GFlops with a config like that.

i7 970 es
Watercooled

[donmarkoni]

Try again, this time using all of your memory channels... lol.
You should also be over 95GFlops with a config like that.

Very hard with such a low UnCore speed...

[Sanousie]

Try again, this time using all of your memory channels... lol.
You should also be over 95GFlops with a config like that.

I would if i was running triple channel ram, but i dont have any 3 matched pair, i get 94gflops at 4.4ghz with a good uncore speed. Only have 2x2gb patriot 2000mhz Hypers, which do 2000mhz cas7 and to be honest, triple channel over dual channel has no performance gains when it comes to gaming (which is what i use this pc for).

But for some reason this ES has a very weak IMC, nothing like my 950 which needs 1.4v for 2000mhz Ram/ 4000mhz uncore.

[sniper_sung]

Update 3:
Can I be the first Gulftown to Join the: 5GHz Club <Over 100 GFlops> (Sandy Bridge and others)……

needforspeed| Core i7 990X [6C 6T] @ 5002.9MHz | 1.640 | ASUS Rampage III Extreme | Water | 3045B094

I have my eye on 5100Mhz.. but don’t know if I have the rocks.. to take the Vcore any higher.. although the temps are fantastic..

Good job!

[Shadow0001]

Any idea if there's going to be a category for EVGA SR-2 owners and using a pair of 6 core CPU's(12 cores/24 threads) and 24 GB of ram onboard?


I've started linx using a 48194 problem size and using 17.75 GB or ram and it's been nearly 20 minutes and hasn't finished the first pass yet....


So i'd kinda hate to need to run it like this for over 400 minutes( about 7 hours) to complete 21 passes...


Yay, first pass completed in just under 20 mins...

[zalbard]

Any idea if there's going to be a category for EVGA SR-2 owners and using a pair of 6 core CPU's(12 cores/24 threads) and 24 GB of ram onboard?


I've started linx using a 48194 problem size and using 17.75 GB or ram and it's been nearly 20 minutes and hasn't finished the first pass yet....


So i'd kinda hate to need to run it like this for over 400 minutes( about 7 hours) to complete 21 passes...


Yay, first pass completed in just under 20 mins...

This is odd. It should be way faster.
Have you tried switching CPU configs (NUMA and such) to see if it affects the performance?
It takes around 2H for a good Gulftown run with 12GB of RAM (link). You have twice more memory, but also twice more processing power. So I'm not sure what's up.
Mind posting your current run?
12GB LinX run could be an option in your case, I guess... Need more info!
You'd fit into "Over 100 GFlops" category, that's not too bad as is. I'll think about it, though.

[Shadow0001]

This is odd. It should be way faster.
Have you tried switching CPU configs (NUMA and such) to see if it affects the performance?
It takes around 2H for a good Gulftown run with 12GB of RAM (link). You have twice more memory, but also twice more processing power. So I'm not sure what's up.
Mind posting your current run?
12GB LinX run could be an option in your case, I guess... Need more info!
You'd fit into "Over 100 GFlops" category, that's not too bad as is. I'll think about it, though.

Keep in mind though that with larger memory amounts also comes options to calculate larger problem sizes too, wich aren't even available to other LinX users if they don't have 24GB of ram onboard in the first place, so that leaves pretty much everyone running a dual channel memory setup out....


I'll have to see if NUMA is posing a problem performance wise, but the only way i get well above 100GF/sec is by calculating small problem sizes and using much lower memory amounts too...Here the picture using a 48194 problem size at 17.7 GB of ram:




CPU cores floored to 100% at nearly 4.2 Ghz, with each CPU using only 1.35 volts and the temps have a hard time exceeding 60*C with the fans set at 60%, so the system is actually pretty silent, but that's to be expected with water cooling....

[zalbard]

Yeah, as you see, GFlops is way too low. Not sure what's causing this...
By the way, just use PrintScreen the next time, much easier, IMO.

[Shadow0001]

Yeah, as you see, GFlops is way too low. Not sure what's causing this...
By the way, just use PrintScreen the next time, much easier, IMO.

I made 2 more runs, with numa disabled using the largest problem size and maxed memory amount, and a second run using a more standard problem size and about 5 GB of memory and the results were surprising to say the least:





This is the large problem size with maxed memory usage and the overall performance fell another 50% with numa disabled compared to my last run with it enabled, so i thought that numa is a requirement for best performance and should not be disabled in the bios at all....Until i did the smaller run that is:





The last time i ran this at those exact settings, i had about aa 90 GF/sec result, and with only numa being disabled, it shot up to 106 GF/sec, so it seems that at least for dual socket systems and when using large memory amounts,Numa is mandatory, but when using LinX with smaller problem sizes and much less memory, disabling numa actually improves performance overall...Weird, but there you have it.


The thing that i noticed when running the large problem/maxed memory size amount though, was that the CPU's were running at lower temperatures for most of the 30 minute run(think 15~20*C lower here), and only occasionally having peaks every few minutes, while running the smaller problem size and less memory, the temperatures were consistently higher for the duration of that entire pass as there's obviously less memory accessing going on...


It gives the impression like the CPU's are spending most of the time in that large problem/max memory scenario accessing memory, rather than spending it on the actual problem calculations(where the CPU temperatures also peak), hence the much lower GF values overall....Just something curious i noticed.

[Shadow0001]

Made another run with numa enabled using the same settings as the second picture in my previous post:






There it is 90 Gflop with numa enabled and 106 GFlop with it disabled for these specific settings....The more the application uses memory along with an O/S that recognizes Numa, the more usefull Numa becomes performance wise, at least in dual socket systems.


Wich brings up a good question, is windows 7 64 bit professional a Numa aware O/S?...

[R37ribution]

I get inconsistent performance in Linx (read as lower GF and less core temps) when I have a problem with low vtt voltage, bad memory timings, a bad RTL setting for one of the memory channels, too low of PCIe freq, incorrect IOH voltage, or even wrong CPU PLL among many other things...

you my friend, are dealing with the sole reason I haven't submitted my 4.5Ghz+ run.... Cuz I wasn't happy with the gigaflop performance. The highest I've seen with my W3520 is 68GF and I'm fairly certain I can get higher and hit it more consistently. The problem is, just when, I'm almost there, Asus will release a new BIOS for my R3G and all my settings won't carry over or I'll learn something new about tweaking a setting in the BIOS like memory RTL or CPU differential amplitude and I'll have to start the benching process all over again. Its fun to me and I'm in no rush to post a result in this thread for that reason.

[Shadow0001]

I get inconsistent performance in Linx (read as lower GF and less core temps) when I have a problem with low vtt voltage, bad memory timings, a bad RTL setting for one of the memory channels, too low of PCIe freq, incorrect IOH voltage, or even wrong CPU PLL among many other things...

you my friend, are dealing with the sole reason I haven't submitted my 4.5Ghz+ run.... Cuz I wasn't happy with the gigaflop performance. The highest I've seen with my W3520 is 68GF and I'm fairly certain I can get higher and hit it more consistently. The problem is, just when, I'm almost there, Asus will release a new BIOS for my R3G and all my settings won't carry over or I'll learn something new about tweaking a setting in the BIOS like memory RTL or CPU differential amplitude and I'll have to start the benching process all over again. Its fun to me and I'm in no rush to post a result in this thread for that reason.

I suppose it's possible considering that in my case,pretty much everything gets doubled up, from the extra CPU to 6 more memory slots for that CPU and all the Bios settings relevant to that CPU and memory, so there's more chances for strange stuff to happen....


On the bright side, i've had Gflops results using settings seen in this thread, wich the majority use smaller problem sizes and memory amounts, where it reaches over 150 Gflops, so slow it isn't....

[aznsniper911]

Today I switched out my memory from 8GB to 4GB but they had tighter timmings but I got a lower Gflop, any reason for this?

[zalbard]

Just a couple of reminders...

zalbard, can you move my listing to the "Over 100 GFlops" section. Thanks!

Just noticed your LinX test is finished on the screenshot, had to pull it.
Please sort this out, mate!

i7 970 es
Watercooled

Nice job!
Need your motherboard info, you forgot to list that. Then I can add you right away.
By the way, amazing job on that Thuban in your sig! Clearly a golden chip!

[zoson]

Today I switched out my memory from 8GB to 4GB but they had tighter timmings but I got a lower Gflop, any reason for this?

Larger problem size usually means more gflops if everything else is equal.
For example, my 12gb kit at 9-9-9-25 gets ~86GFlops at 2GHz with cpu at 4.2, while my 6gb kit at 7-9-7-20 gets ~83GFlops at 2GHz with cpu at 4.2. The difference is the problem size with 12gb is ~9GB, and the problem size with 6gb is only ~5GB.

[-R8-]

hi all ..
this is my a new z68x ud7 board and 2600k



Are there any comments about the voltage ?
thanx .