How to find your real GDDR frequency

1. The official frequency is 950 MHz. The memory specified frequency is 1000 MHz. The 285M uses the same Samsung memories as the 280M both MXM 2.1 and MXM 3.0.

Unfortunately you don't have much OC headroom.

2. The best stuff for cleaning components is Isopropyl alcohol.

3. I should update the initial post...

 

I thought the gtx 285m had the vram at 1020mhz stock:
NVIDIA GeForce GTX 285M - Notebookcheck.net Tech
The NVIDIA GeForce GTX 285M GPU ? NVIDIA?s fastest mobile GPU.

Even the vbios I downloaded said 1020mhz.

 

Maybe I'm wrong then. But that's what I remember from the Clevo thread ... although it was a long time ago.

EDIT: I've check the old threads and overclocking performance as well as Soviet's attempts to overclock the card point towards 1000 MHz as the official frequency as well as memory specified frequency.

Aaand, found it: http://img842.imageshack.us/img842/17/285m.jpg Looks like 1A... 1000 MHz.

 

Damn, that photo could have spared me alot of trouble....

I opened it up and can confirm that it is 1A - 1000mhz.

Itæs is correct what you posted MH, nVidia states that it supports uptp 1020mhz

 

can some one help me oc my nvidia 8400m gt,thanks

 

There isn't much you can OC out of a 8400M. Besides most of the 8600M and 8400M series are defective and are prone failure so OC-ing them is like asking for a new laptop within 3-5 months.

If you are fine with all that... then sure. My first advice is the reapply the thermal paste, clean the vents and than run some benches while monitoring the temperature. After that we can get to the OC-ing part.

 

The GT seems to be better than the GS's in the 8400/8600M series in my opinion, you might be able to OC it a bit. The GS's were horrid though...

 

Please send that pic. 250M with GDDR5.... maybe you can also get a GPU-Z pic.

I am still a bit confused, but according to this, then the frequencies I have put on the first page of this post are correct. The 460M while actually clocked at 600 MHz has memories that can go up to 1250 MHz ...right ?

 

I've also OCed a 8400M is someone's laptop a long time ago. But I reapplied the paste and cleaned the vents. With a 20% OC the card was running 100% stable and slightly cooler than before. The laptop is still working fine to this day and this was 2 years ago, but there wasn't much of a performance gain.

 

Yeah, I did something like what you did and my dv6500t to this day still runs damn well OC'ed 4 years in. *Knocks on Wood*

 

Coz 6970M's memory runs at a lower voltage.

 

Comparing 625MHz(460m)/750MHz(470m/480m/485m) to 1250MHz..

Thus I suppose 460m/470m/480m/485m must have been set a even lower voltage for memory chips..

 

I found a card with Hynix t2 chips on a 256 bit bus!

its supposed to be rated at 625mhz

BTW those cards I had turned out to be Quadro fx 1800m gddr5 cards

 

That's fine. Depends on how you count it. It means the real clock is 625 MHz, but for comparison with GDDR3, it's more accurate to say they have a max clock of 1250 MHz. What brand are your cards?

 

Its a dell quadro 3000m

The thing is, according to notebookcheck the max clock is actually only 625mhz!
So the real clock would be 312.5.

Notebookcheck must be wrong, huh?
It is the only 75w TDP card with a 256 bit memory bus, its gf104 based, and worse than the gtx 460m which has less shaders. But the clocks are also very low. Somehow I don't see the performance being that good with ddr5 thats as slow as ddr3.

 

No,Q3000M's memory is set @1250MHz(625MHz real) stock. Those careless NBC guys wrote real frequency of Q3000M while GD3_Equivalent frequency of other fermi mobile cards with GD5 memory.

BTW: I got a hold of a unknown brand Q3000M vbios, version 70.04.25.00.03. What about your dell Q3000M's vbios?

 

Yea though so. Looks like all of the cards on the benchmark list just got doubled today

Don't supposed its supported by Nibitor yet (if ever)?
My 3000m is at the post office. I'll post the vBIOS version and upload it tomorrow if you want. I may be very interested in yours depending on how my card works and if it has a different vBIOS. Man I hate Clevos.
Actually I was wondering if anyone would know how to figure out vBIOS level overclocking based on 2 different vBIOS, if they have different clocks?

BTW nice SLI! thinking about trying some 4870? I'll reball you 2 gddr5 cards but I can't guarantee they'll work.

 

I checked my 9800MGTX and find the suffix ends in HC12.
1.25ns 800MHz Samsung memory.

Its part number shows 6-71-D90CL-D21. It was pulled from one D901C.

So there are two kinds of clevo 9800MGTX. Both are with Samsung memory, 1.0ns or 1.25ns.

And Quadro FX3700M. Two kinds memory chips as far as I know.
Clevo / Lenovo early / HP early version: 1.1ns 900MHz Qimonda.
Lenovo later / HP later version: 1.25ns 800MHz Samsung.

 

Thanx, I've added them to the table from the first post. I've also updated the table with some new GDDR5 codes.

 

Thought so, so that's the real order, thank you very much Blacky

 

fyi, here is the picture of the VRAM chips in SONY VAIO SA ( original post). the chips say K4W1G1646G-BC11 on them. according to this data sheet by Samsung, they have an access time of 1.07ns and run at 933MHz. the datasheet specefically says "Graphic high speed binning was unified to EDP binning (1800Mbps→1866Mbps)".

my question: i have overclocked my GPU (Radeon HD 6630m) from 485MHz core/800MHz memory/900mV voltage to 725MHz/945MHz/904mV. given the information above, it seems i'm running the memory chips out of their designed frequency range (by 12MHz). i get occasional driver crashes or hangs while playing Battlefield 3; they are rare and happen once every 5 or 6 times i run the game. do you think they're related to the OC'd memory? also, is running the chips faster than their designed frequency going to damage them?

 

A good practice is to first just OC the core, see if it's stable. Then OC the memory and see if it's stable. If it becomes unstable, keep the memory OC and downclock the core to see what happens.

Getting a stable OC requires some time and patience.

 

anyone know what the chips on the 485m are rated for?

 

As far as I know, they are the same as for the 470M and the 460M.

 

ok, so just a theoretical question, if one were to solder on faster memory, would that even work?

 

Theoretically.... yes...

 

oh, the OC is very stable, from playing games to watching videos to editing photos. it's only Battlefield 3 that crashes from time to time (and there are many reports of the same happening to other people with different GPUs and with or without overclocks). my guess is that it's a combination of the drivers + Battlefield 3's buggy code, and here is my reason. i once updated my drivers from the ones i'm currently using (Catalyst 11.6) to a newer version provided by SONY (mix of Catalyst 11.6 and Catalyst 11.8), and BF3 kept crashing over and over and over, every five minutes. i reverted back to the older ones, and the stability returned.

i also have to mention that the GPU temperatures is always below 86C when playing BF3, and that is the highest it's ever getting. of course, there is no VRAM temperature sensor in my laptop, but my notebook cooler is blowing cool air directly to the memory chips through the air-intake grills at the bottom of the laptop.

so, my question: considering that the memory chip is designed to run at 933MHz and that its default clock is 800MHz in this laptop, is there a danger in running the chips at a higher clock than 933MHz?

PS: i lowered the memory OC from 945MHz to 933MHz and increased the core from 725MHz to 745MHz on 904mV core voltage (so my new OC values are 745MHz core/933MHz memory/904mV voltage; i.e., ~ 54% increase in core frequency, ~17% increase in memory frequency, ~0.4% increase in core voltage over the default values). playing BF3 for about two hours was rock solid.

 

I can't say for each memory what will happen if you go above manufacturer specified clocks. But I can assure you that as long as you keep within the manufacturer's specified clocks, your OC should be stable.

 

ATI 3870 (alienware? MXM 2.1) = 11 = 900Mhz.
H5RS5223CFR-11c

ATI Asus 4870 (MXM 2.1) = N0 = 1Ghz
H5RS5223CFR-N0C

 

4870m MXM Type III Alienware 11 900 Mhz Qimonda.

 

Usually on nvidia cards it is the memory controller/PCB holding the speeds back rather than the memory chips.