M18x R1/R2 Sandy Bridge and Ivy Bridge CPU Overclocking Thread

[electrosoft]

interesting, whats your flex in the bios? level 3 oc puts it to 25.

Also from your runs all my Cine results were still higher as well the wprime32.

My 1024 score is lower (203.585 vs. 207.559)
Your 32m is lower (6.458 vs. 6.73)

Cinebench R10 Single = 7395 vs 7426
Cinebench R10 Multi = 25776 vs 26039
+ you using better memory (Which Cinebench takes advantage of)

I know you know these chips are equal in our given criteria (A03 Stock, Level 3 normal day to day use).

Flex is what it defaults to, so I would say it is 25.

I'm going to start working on the Bclk later to see how high I can get that stable for day to day use.

[Aikimox]

My flex is 0. Ok will try your setting s later on. BTW, what's your superpi score at those settings?

[residualvoltage]

Guys one thing remember when comparing... dual channel and single channel ram make some differences as well as amount of GB of ram and plus 1600mgz vs 1866... Even ram volts can make differences. I have 1333 ram rated at 1600mhz at 1.65v ram that's natively 1600mhz will do better and higher even better. Especially if a ram is rated high in MHz and rated at low volts like 1.5v... that would be the best scenario. So its still hard to compare Aikimox even if you set 1600mhz your ram will have an edge.

[mharidas]

How much of a loss is there with the ES 2920XM compared to the retail 2920XM? I ask this because such stepping differences can affect many cache, variances in set associativity of the cache, prefetch, TBL, pipeline stall level sensitive simulations and similar tools. Might not be apparent in some common day to day tasks. But in some specialized applications the differences between an old ES and the retail chips can be significant.

[residualvoltage]

All presets are editable with the + and - buttons of the keyboard. So for comparison you both can enter same values so flex, short limit, long limit, time limit, and the 4 multipliers are set the same. So both of you can take pic of bios set the same way... So nothing is different and even if Aiki your ram is faster programming it to same XMP 2 @ 1600mhz for both of you would be better comparison except Electrosoft has 8gb and you have 16gb... But for comparison in the least you should set 1600mhz not 1866 or its definitely in no way an even playing field.

Its a shame two members don't have identical ram, HD, and parts except only difference being 2920xm and 2960xm since that would give non skewed results.

[residualvoltage]

How much of a loss is there with the ES 2920XM compared to the retail 2920XM? I ask this because such stepping differences can affect many cache, variances in set associativity of the cache, prefetch, TBL, pipeline stall level sensitive simulations and similar tools. Might not be apparent in some common day to day tasks. But in some specialized applications the differences between an old ES and the retail chips can be significant.

well at first it was seeming ES was limited but if you take my OEM and Johns ES we can see a great comparison and the results are they are nearly matched so if John would jump in and elaborate I think it will be clear that we both thrashed these chips and reached about the same plateau. John mentioned he noticed just a small difference I think so if there was one I'll let John elaborate on that right now. For 200-$300 vs $900 its a clear choice to save money as most people won't see a big difference.

[electrosoft]

True, I'm running 4GB of HyperX 1600mhz RAM. I think I noted in a previous post the ram discrepancy.

I'm going to lower the flex in increments and run some tests later to see if it will help raise the multi's/scores.

[residualvoltage]

True, I'm running 4GB of HyperX 1600mhz RAM. I think I noted in a previous post the ram discrepancy.

I'm going to lower the flex in increments and run some tests later to see if it will help raise the multi's/scores.

cool
reference: 4.6ghz ~ wprime 1024m ~ 14flex
4638mhz ~ wprime 1024m ~15flex (personal experience)
0flex = coolest chip but needs to be raised as higher quad speeds are used. Over 4.5ghz single will need a Voltage bump too but the Quad speeds require it faster.

[johnksss]

well at first it was seeming ES was limited but if you take my OEM and Johns ES we can see a great comparison and the results are they are nearly matched so if John would jump in and elaborate I think it will be clear that we both thrashed these chips and reached about the same plateau. John mentioned he noticed just a small difference I think so if there was one I'll let John elaborate on that right now. For 200-$300 vs $900 its a clear choice to save money as most people won't see a big difference.

(not directed at you...just answering from here...)


for 300 bucks, the chip is worth that and more! hands down. it can run with the big dawgs! and it can crawl with the pup's (4.5 to 7.5 watts).
what i found to be different.
max voltage 1.351V
max watts on anything but prime95 85 watts. (prime95 about 90 watts it would touch every now and then)
oem has a .150V increase over it along with pulling more watts.
but yet it's still faster than every single other mobile chip out.(other than 2920xm/2960xm oem's)

[Aikimox]

Looks like I'm not even close to the limit @ stock BIOS. Managed to get 6.3sec in Wprime32 (4.1Ghz through the whole run). The 1024 test is screwed at the end because of the cooling limitation. I have 25.5c in the room and all sensors get past 85C, so it throttles. But the beginning of the run was good (4.1-4.0ghz for 20%, then 3.9Ghz for the rest till the temps get out of whack.
Flex is still 0 BTW