my cpu multiplier is set at 40x but shows 38x..please any help would be nice.

hussian · Mar 12, 2015

For Starters these are my specs:

Operating System
Microsoft Windows 7 Ultimate 64-bit SP1
CPU
Intel Core i5 3470 @ 3.20GHz
Ivy Bridge 22nm Technology
RAM
8.00 GB Dual-Channel DDR3 @ 977MHz (11-13-13-30)
Motherboard
ASRock Z77 Pro4 (CPUSocket)
Graphics
VA2231 Series (1920x1080@60Hz)
NVIDIA GeForce GTX 760
Intel HD Graphics

i have set my multeplier to 40x in the bios on all four cores but shows only at 38x in windows...

here is link to the pictures.

http://tinypic.com/3ia4d4k2

please any help would be nice.

thank you.

synphul · Mar 12, 2015

Was there a stress test active? It looked like windows was showing multiplier being 16-40 and current active was x38 so maybe it wasn't fully stressed when you were looking at it? What does it say if you drop your baseclock back to 100mhz rather than the 104.77 you have it pushed to. Being a locked cpu it may not be playing well at x40 multiplier with the bus speed hiked up since it's pushing close to 4ghz as it is.

Moonstick2 · Mar 12, 2015

I'm partly guessing here, but that 16-40 range for the multiplier includes both Speed Step and Turbo Boost. You've disabled Speed Step so that maximises that part of the multiplier. Turbo Boost on the other hand (which you've enabled) can't be applied all the time - it's dependent on the number of active cores as well as various thermal limits.

e.g. this CPU-Z shot of an i5 3550S gives x37 as the maximum, corresponding to the Turbo Boost maximum of that processor.

So in order to get the full x40, I'd say you need just one core working for a start and if you've got that but are still 'only' getting x38 then it's most likely a thermal issue for an overclock like that.

hussian · Mar 12, 2015

synphul :

if i drop my base clock back too 100 it will show 3.8 ghz still stuck at 38x wont go 40x
i have tried all sorts of stresses tests OCCT,prime 95 etc
still stuck at 38x
P.S i have see other with same cpus getting 4 ghz at 100 base clock with 40x
pic here http://tinypic.com/3ia4d4k2

hussian · Mar 12, 2015

Moonstick2 :

i have seen other ppl get x40 on all four cores
pic here http://tinypic.com/3ia4d4k2

and what do you mean my thermal issue??

Moonstick2 · Mar 13, 2015

I'm not sure how that screen shot shows you that all four cores are running at that speed? CPU-Z shows you only the highest core speed.

One way of thinking about Turbo Boost is that on top of the base frequency of 3.2 GHz the i5 3470 has four extra 100 MHz 'boosts' to play with, giving it a maximum turbo frequency of 3.6 GHz but these have to be shared among the cores. So if one core is doing a lot of work it can be boosted to 3.6 GHz, but if two are working hard they get 2x100 MHz each so run at 3.4 GHz. If all four cores are working hard, they get 100 MHz each.

And it's not just the workload but also the current and temperature that affect how much of a boost a core can receive. So even if only one core is doing lots of work, it might only get two boosts instead of four if the logic decides it's running too hot. Overclocking doesn't increase the amount of boost available, and it makes sense that the boost could be less likely to be applied to an overclocked (and thus hotter) chip. That's what I meant about thermal issues.

Have a read through of http://en.wikipedia.org/wiki/Intel_Turbo_Boost to understand Turbo Boost in more detail.

It's only a theory, mind, based on the idea that the x40 setting in the BIOS includes the turbo boost. Some CPU-Z screenshots of 3470s show x16-x32 (corresponding to the non-boosted top frequency) and some show x16-x36 (the full boosted). The simplest thing you could do right now is disable Turbo Boost in the BIOS and see what you get in CPU-Z.

synphul · Mar 13, 2015

I'm not sure you're guaranteed to hit any multiplier over stock. If the base clock is 100mhz with a max rating of 3.6ghz with turbo boost it sounds like you already have the multiplier pushed past stock levels. Essentially trying to overclock a locked cpu. Same goes for any overclocking, there are no guarantees. One cpu may hit 4.8 while another of the same model only hits 4.4ghz.

hussian · Mar 13, 2015

synphul :

the cpu fan i am using is DeepCool Frostwin CPU Cooler.

so your saying im just out of luck. :??:

and forget reaching 40x. :heink:

the speed might be different but the multiplier is the same on all cpus

http://i62.tinypic.com/2eczx4x.jpg

synphul · Mar 13, 2015

Here's an article about it.

http://hothardware.com/Reviews/Intel-Core-i53470-QuadCore-CPU-Review/?page=8

They managed to get 40x multiplier but with a voltage increase as well. It can be pushed a little higher than stock (even stock turbo) although I think it may depend on the chip, motherboard, fine tuned settings with vcore etc since it isn't officially an overclocking (unlocked) cpu. Even 'k' series make no promises or claims about what you're guaranteed to reach so I'm thinking the same applies to the locked editions as well. Even if they have quirks that allow them to be upped a little bit, since they're really not made to be overclocked. It's a bonus that the multiplier can be increased at all really. That's more or less reserved for unlocked cpu's.

At this point it may just be principle of the matter, trying to reach a goal. In reality, the difference between 3.8ghz and 4ghz is very slight. Granted the cpu's come with a turbo feature which ups the cores a little under load but reaching 3.8 with a locked cpu designed to run at 3.2 isn't bad really.

hussian · Mar 14, 2015

synphul :

THANK you VERY MUCH..your reply s have been helpful.

and i did manage to over clock my cpu to max 4.2 ghz on one core and 4.0 ghz on all cores at 105.5 BUS

and it looks stable.

please look at my voltage and temp..is that ok.
http://i62.tinypic.com/2rntxmf.jpg

synphul · Mar 14, 2015

Are those temps under load with a stress test or? If so, looks like you're ok. You're under 70c and the vcore looks ok. If it's a stress test like prime or something chances are your temps will be even a little lower under normal use like gaming or whatever tasks you're using it for.

hussian · Mar 14, 2015

synphul :

yes it was under load ..i was using prime 95..i even left it on occt for 2 hours straight. max temp on one core was 72c.
i happy with my results .

thank you .

synphul · Mar 14, 2015

That's great, glad you got it sorted out. What was it that finally allowed you to get past the 38x multiplier? I've noticed others having similar troubles, it might be able to help them out.

hussian · Mar 14, 2015

i simply enabled c1e,c3,c6 and package C State Support.
and this forum was really helpful.
http://www.overclock.net/t/1198504/complete-overclocking-guide-sandy-bridge-ivy-bridge-asrock-edition
please pass it on

synphul · Mar 14, 2015

Thanks for the update, I'll have to remember that.

hussian · Mar 15, 2015

synphul :

ahh mannn.. now i get random BSOD

what does this mean

BCCode: 124

synphul · Mar 15, 2015

Usually it's a hardware error. You can try reseating your ram, but I wonder if it isn't acting up from the overclock you have going. Try leaving your multiplier at 40x and taking your base clock back down to 100mhz instead of 105.4mhz. Bus speed altering doesn't take much to start causing the pc to brainfart. I'm thinking the bus speed increase on top of the higher multiplier just isn't agreeing with it.

hussian · Mar 15, 2015

synphul :

i just increased my vcore and its fine for now.

synphul · Mar 15, 2015

That's good, at least you didn't have to give up the o.c. Sometimes it can be a matter of trial and error fine tuning an oc.

hussian · Mar 15, 2015

synphul :

hmmm. im not sure ..i mean soo far i have not got any BSOD and i have done memtest all error free..
but still in some software and games are acting up..like in the middle off the game i get a "not responding"
and even in some apps too like progdvb.

you think its related some how.

my cpu multiplier is set at 40x but shows 38x..please any help would be nice.

Reputable

Champion

Distinguished

Reputable

Reputable

Distinguished

Champion

Reputable

Champion

Reputable

Champion

Reputable

Champion

Reputable

Champion

Reputable

Champion

Reputable

Champion

Reputable

Share this page