Overclocking GT650M to GTX670M levels?

I know it's easy to overclock the GT650M to GTX660m levels but is it possible to overclock it to GTX670M levels?

 

660M is still faster than the 650M since you can overclock that. And 670M still faster than 660M since you can overclock that. It just doesn't work the way you think it does.

 

Yes you can. Hell, even the MBP retina scratches stock GTX 580M (675M) levels

 

So I should be able to overclock my GPU in myCompal QAL-15-HD to GTX675M levels? What frequency would that be?

 

lol, that is ridiculous. I have a 650m in an m14x and mbp retina, I have a 670m in a precision m6600. Alll have similar quads.
The 670m is much faster in BF3, Shogun 2 and dirt 3. I have even clocked the 650m to 1150/2700 and it still doesn't beat a stock 670m let alone an over clocked 670m. The 675m is about 20-30% faster than a 670m so there is no way you will reach those levels

 

depends on what memory your 650 has, if its got DDR3, no way you can, but if its ddr5 you can probably do a mad overclock to 675 level, given you have enough cooling, though you might have stability issues. though you would need to overclock by 50% (based on 3dmark 11 scores)

 

What's the max I could get it to if I have DDR3?

 

i dont know since i dont have the card, but i would guess 15~20% for a stable overclock. i am able to do 15% on my 675 and its stable

 

Yes, yes you can. Although the MBPr uses GDDR5, DDR3 should perform very close to DDR5 variants.

Check my sig for a 650M OC tutorial

 

hey is there a tutorial on how to overclock the MBPRD's gt650m ? I'm a complete NOOB when it comes to this things . Is it hard to overclock ?

Thanks !

 

The above is false.

Stock out-of-the-box 675M get 3700ish 3dmark11 scores. I think perhaps you are quoting old scores. The MBP retina scores 2500 or so out of the box and ranges up around 3k. Some people have reported up to 3200. I have NEVER seen a MBP reach 3700.

Furthurmore, the MBP retina cannot maintain those OCs/scores due to inadequate cooling. (its not the 650m's fault, the cpu is to blame)


A stock 670m scores around 3300 with up-to-date drivers and pushes over 4k when OC'd.

So yeah... a 650m can almost reach stock 670m scores provided you are very lucky. Not that this is surprising at all given that the 670m is a rebrand.

 

One thing is benchmark scores, especially the lame Performance preset. Another thing is actually FPS gains from the overclock, where the games are usually played in 1080p, where you will see if the bandwidth plays a role etc etc

 

Well, let's be fair... the 650m 660m and 670m have similar memory bandwidth.

At stock:
The 670m is 192-bit @ 1500 for 72GB/sec
The 650m/660m is 128-bit @ 2000 for 64GB/sec (assuming the 650 has Gddr5)

Given the 12% difference, I think we can conclude that a little overclocking can cover that memory bandwidth difference.

Furthurmore, the 3dmark11 performance preset is actually a fairly decent measurement of these GPUs given their similar stats.

The texture fill rate between the 670m (33.5 Bil/sec) and the 650m (27.2 Bil/sec) is about 23%. It is actually completely believeable that an overclock can compensate for those differences.

3dmark11's 2500 and 3300 scores are 32% difference, which does come fairly close to the hardware differences between the two GPUs.


You are totally correct about more powerful GPUs like the 680m and 7970m, which really should use the extreme presets due to their potency.

 

/:
sorry about that, must've misinterpreted info on the rMBP OC thread


anyways hitman, have a go from the tutorial that's in my sig

 

Well a GTX 660m Yes you can NVIDIA GeForce GTX 660M video card benchmark result - Intel Core i7-3610QM Processor,ASUSTeK COMPUTER INC. G75VW score: P3734 3DMarks and that's not maxed out that's just a daily clock with a load temp of 72c


The GT 650m and GTX 660m use the same cores. However the GTX 660m cores are binned higher so most of the time they will over clock higher then the GT 650m's

 

Well, let's be fair here... the ASUS also has some of the best cooling around for a 660m. The 650m are usually not shipped with cooling at that level. Indeed most 660m don't have anywhere near that level either.

 

I have seen MSI's and some Alienware M17xR4 with GTX 660's all break 3700 pretty easy. Soon as someone breaks my record i'll submit a 4k run on a GTX 660m volt modded tweaked memory timings in the bios but i don't expect anyone to get close to that unless they are heavy into benchmarking like i was " desk top benching for team 32" and on that run my temps were around 87c load but i was pushing some mhz on that core.



But my overclock is the higher end of the GTX 660m's. Can people get this clock? Yeah its pretty easy its only 1340 i did it without a volt mod or any tweaks . You just gotta know what your doing. For most people who don't know how to overclock kepler 1,100-1,200 is their max.


Now can a GT 650m be pushed to GTX 675m speeds? Yes and no. A small number of them should get close but it wont be a easy overclock. This is why people pay the premium for the GTX 660m because the cores a binned higher and with overclocking binning is everything.


Now another thing people fail to realize are the improvements made in Kepler vs fermi. There were some pretty decent improvements made to Kepler.


If you get 1,100 on the core of the GT 650m be happy. Its not that its not a good gpu it was just never meant to to be the card you want it to be. If i get my hands on a GT 650m i'll see what i can do with it and see how far i can push it. If anyone in South east Michigan has one and would let me hot rod your laptop for a few hours hit me up lol.

 

The improvements on paper are power efficiency, video encoding and HDMI output. (and artificially limiting gpgpu performance)
Unless you know somethinig Nvidia has not revealed...

I outlined the Nvidia hardware stats and differences. The 670m actually has better stats overall.

As for 660m reaching 675m scores, I think we can call those unusual results if they truly exist. The 675m has much better physical stats than the 660m.

660m
30.4 bil/sec texturte fill rate
64GB/sec memory bandwidth

675m
39.7 bil/sec texture fill rate (30+% better)
96GB/sec memory bandwidth. (50% better)

An overclock which truly bridges those gaps (as opposed to comparing apples to oranges) is impressive.

 

I can post the all mighty means everything as long as your right 3dmark 11 all day long of my little GTX 660m matching and beating GTX 675m's all day long. Because you know synthetic benches really do reflect real world performance. I ran the GTX 660m with a oc against a stock and a slightly overclocked 675m same drivers , cpu, ram, ssd, chipset etc and the gtx 660m matched and in some it was a few fps faster 2-4.

Then whos who admit that ok so you got one to preform on par with a GTX 675m thats the only card in the world to you cooled it with liquid helium and ran 750 volts to the core to stabilize it. I hit 1340 on the core pretty easy. I seen a lot of them hit 1200 on the core no problem. I seen quite a few hit over 1300. These areall without volt mods. Volt modded i can get some more out of that and the temps are still pretty good. And with the tighter timing in the bios i can crank out a few more points in 3d mark. My results were with a stock card and a stock bios I seen no reason why a GT 650m cant hit 1100-1200 pretty easy if it has the cooling system to cool it. Anything more is pushing it due to how they were binned.

People have matched GTX 675m's with 660m's in MSI's and Alienwares so its not just the G75's super cooling.


Personally i could care less whats faster. I use a Sager with a GTX 680m as my main notebook. But im one of the only few people here who have a GTX 660m and a GTX 675m and did some testing with the same hardware and drivers. Are my results average? No my card is on the higher side. Well currently the highest and if anyone takes that i got another run i'll submit with a volt mod and take that back. But there's a lot of cards that are close to it or close to stock GTX 675m's give or take a few fps.



Now all that said back on topic.


Yes it can be done with a GT 650m to match a GTX 670m however due to the binning only a small % of the GT 650m's will be able to reach the clocks needed. The card will need to be in the 1300+ range and you will also need to be able to power it since its going to be drawing much more power and you will also neeed to cool it. Keplers for me ran pretty cool till the 1,000 mhz range. After that they start to get toasty "depending on your cooling system"


Now another thing is more or less of the notebooks that came with the GT 650m dont have the option for a GTX 660m or GTX67XM. The GT 650m's TDP is 45w why the GTX 660m and GTX 670m is 75w why the GTX 675m is 100w. As you can see your looking at quite a bit of power consumption across them and also your looking at a fair bit of heat. Point is if you do have a GT 650m that will pull 1350 on the core chances are your not going to have the power and cooling system to support it for long. The big problem here is the power. If you stress the power system you can burn out components in it. Its just not as easy as i want it to be as fast as a GTX 670m so im going to click this button and presto its done. You need to consider some other things if you want your card and system to last long.


I had a samsung for a shot time. Had a GT 650m. I was able to match the GTX 670m with it. However i will tell you the thing got hot. 88c in games i wouldn't even run furmark on it because it would prob go over 100c. Also that laptop was never meant to have that kind of load on its power system. Nothing burned up on it and i got rid of it but for the short test i did on it i found out yes the card "chip as its soldered to the motherboard" was capable of matching it. However the rest of the notebook was not

 

My laptop maxed out at 1090/2500 #failcard

 

You probably could but... you dont pick a 660gtx for the speed but for everything else... price is much lower... temperature is also a lot better... and the speed is very good... with a medium overclock i can get 29xx on 3dmark11... but i dont use it at this speed... and i dont really need it...

Sure i the asus cooling system is way better... but also way more expensive...


And yes the 660 and the 650 ddr5 is the same chip...

 

You post a lot of text but end up agreeing with me in the end.

We should not assume a 660m will reach 675m speeds and we should not be giving advice that it will. It is altogether unprofessional to give advice pushing a 30+% performance overclock.

I did not say impossible, I said unusual/impressive. The 660ms I have tested (MSI/Lenovo) will not go above 3400-3500 3dmark11 and a bunch of retina mbps won't break 3100 on their best day.

We have a few 675ms. (MSI/Sager) Their stock out-of-box performance repeatedly beats every 650m/660m in the place.
Maybe we just didn't get as lucky as you did.

Furthurmore, we need to talk about the difference between a "I-ran-it-once" benchmark and one that you can count on for everyday performance. Maybe your 660m is insanely good. However, not every 650m/660m owner can count on the performance you are talking about. YOU might know the difference between an extreme benchmark and an everyday overclock. Not all of our readers do. The worst part is... most of the 650m/660m laptops are the "ultra-thin" variety and thus really do NOT have the cooling to maintain the performance you are talking about. (The ASUS being the notable exception.)

You seem to think I am attacking the 650m/660m. I am not. I am just trying to bring reason and numbers into what seems to be a very polarized and sensationalized topic.

 

What drivers are you using on the 670m? I only get around 2700ish GPU score with my Clevo P151EM at stock clocks with 306.23 and a clean (more or less) install of windows.

 

Stock every day driver is 1340mhz max stable is 1380. bsod at 1405 volt mod takes it to 1500+


I seen cards from MSI, Asus and Alienware "Dell" all break the 3700 mark. The problem is most people have no idea on how to overclock a kepler. Now lets look at some facts. 1/2 of the people with gaming laptops with the lower end GT/GTX6XX don't know anything about computers. Then out of the 1/2 that know 1/2 of them don't know anything about overclocking.

Also people just don't see that when you overclock a 75w gpu you are going to draw move power. This is why the mac book pros score so low. They just cant power the card with a 85w power supply.

I haven't looked into it yet but im going to get some numbers of the gpu's power consumption stock at 100% load then at 1,100 , 1,200, 1,300 and 1,350 mhz. See how much more current the card is drawing since those are the most common clocks people been getting without volt mods.

 

If you have the DDR3 model of the 650M, you should focus more on overclocking the memory as high as you can. The higher memory bandwidth will aid you greatly in games.

 

The DDR3 version of the GT650M I have craps out and starts bsod-ing when I hit anything more than 1100MHz. This was done on stock voltage though.

 

I got the GDDR5 version in my MSI 16GA barebones and i get like 1085/2500 on stock voltage, I need a vBIOS mod so I can get 1100/2600, if i can get GTX670M performance, I'll be happy