T7700 vs T8100, which to keep?

Hi Guys... what do you think? right now I have both,

my notebook is dell vostro 1400
T7700 is used and taken from asus G2S ..been using this for weeks now.
T8100 is ES (Q8LB), used, taken from Toshiba Portege M800 (I can't believe they used ES on this).. just got it today.. it's in the vostro right now..

--Performance--
T7700 win of course,
wPrime 32M: T7700 = 36.672 sec; T8100 = 40.187 sec
Fritz chess: T7700 = 6.74 / 3236; T8100 = 6.10 / 2926

-- Heat --
T8100 win, of course
stock temperature (w/o undervolt), same system, same thermal paste (Tuniq TX-2):
T7700 idle = 43 C; max load = 75 C
T8100 idle = 25-30 C; max load = 47 C (both Orthos 10 minutes)

undervolted:
T7700 idle = 38-39 C; max load = 67 C
T8100 idle = 25-30 C; max load = 38-39 C (all FIDs have lowest VID)

-- battery life --
I haven't test this, since I'm using it mostly as Desktop replacement ..
it's not really important for me

I do programming (w/ compilers), daily browsing & office, casual musics and movies
and now I'm a bit confuse.. of which to keep.. the loser will be gone for sale..

anyway.. eventually I want to get T9500.. but only on really good deal..
now it's really not about performance upgrade,, it's just so fun when you get a good deal LOL

Thanks in advanced !!


========= UPDATE =============
Figured out! Got a great T9300 LOL
T9300 is used taken from Toshiba A300

--Performance--
wPrime 32M: T9300 = 33.562 sec
Fritz chess: T9300 = 7.34 / 3522

-- Heat --
stock temperature (w/o undervolt), same system, same thermal paste (Tuniq TX-2):
T9300 idle = 25-29 C; max load = 55 C (Orthos 10 minutes)

undervolted:
T9300 idle = 25-28 C; max load = 47 C

I think we have a winner

 

Cant you keep the other for backup?

I think you have pretty much summed up your choices, battery life or performance.

Personally id go for the T8100. Performance difference between the two is little to none for everyday programs. T7700 should fetch more money too.

 

It's a hard choice. Unless you can overclock your T8100.

When I took my T8100 to 2.6ghz it was about as hot as your T7700, but more powerfull according to Fritz.

 

Hi flipfire, thanks for the comment!
I'm not sure about keeping 1 for backup.. if sold I can use the money .. maybe for another "fun" upgrade lol

@all,
if I'm going from T7700 to T8100, would you say it's an upgrade or downgrade??

Thanks for the comment!
How I wish I can OC my system
I don't have the tools for h/w mod, and don't have enough knowledge about electronic components..
if someone has guide on h/w mod on Vostro or Inspiron maybe I can follow..

 

Depends on what inspiron you have:
http://forum.notebookreview.com/showthread.php?t=421279
http://forum.notebookreview.com/showthread.php?t=393027

I might be able to help you.

I have a T7300 that is stable @ 2.6ghz.
But I like my CPU to be cool, it's summer right now for me. So I don't ever run higher than 1.6ghz.

You can do the same if you keep the T7700. Run it at 2ghz and undervolt and you will have something similar to a T8100. But you will always have the option to run it at it's full speed when you need to.
http://forum.notebookreview.com/showthread.php?t=235824

I would sell the one that you think will make more money.

 

wow Greaatt ! if you see the thread, I wasn't able to see the picture nando4 posted.. but now I can !
but the picture doesn't show the Ground point
Vostro 1400 will be the same as Inspiron 1420..
I'll see if I can take it apart to see the PLL
btw, great thread moral hazard !

I do have my T7700 undervolted --Thanks for the great thread flipfire! --
it idles 38C and max 67 C (it's also hot here and I'm in non-air conditioned room)
I can't make it any lower.. guess bcause it's a hot merom

I'm planning to undervolt the T8100 tonight, will update the result

 

I was able to get my 10x multi to 0.9500V (for the T8100).
Didn't test the 10.5x.

You should get something similar, good luck

 

these numbers look surreal, even T4200 could hit 60C max...

 

Thanks! now I have reference

I don't know if the thermal sensors are wrong, but I always took screenshot of the new processor:



doh, I forgot to put the max, it's 47 C not 45

 

== flash update ==

T8100 undervolt is very good.. I managed to get all FID @0.9500V (lowest VID here)
I also checked IDA to 0.9500V, will there be any problem with this?

now with undervolted T8100, the max load is the same with idle temp of undervolted T7700 = 39 C; idle temp of T8100 doesn't get much changed..

The only problem I found with this ES cpu is the minimum thermal for cpu#0 doesn't get lower than 30 C ... while cpu#1 changes between 25 - 27, the cpu#0 seems to stuck to 30C
but when on load it raises normally..

PS. I still can't decide ... is going from T7700 to T8100 an upgrade, or downgrade??

 

sell both and get T9500 FTW!

 

I would check the MSR 0x17 of the ES CPU to see if it's Unlocked Multiplier.

 

And

1) What will OP be doing in the mean time while waiting for the T9500 to arrive?
Stare at the possibly CPU-less computer?

2) And if that T9500 turns out to be a lemon?
Stare at the possibly CPU-less computer?

Out of curiosity, why a T9500 over a T9300? Last I checked, performance increase wasn't that high, and it was a fair bit pricier. Would seem that the T9300 would usually be a better deal than the T9500.

I actually like flipfire and moral hazard's suggestions. Sell the T7700 and keep the T8100. When you need extra performance, you can overclock the T8100 and otherwise, the lower temps and increased battery life will help too.

 

my t8100 runs at similar temperatures although i dont really want to overclock because it will mean more heat to my already hot gpu as they share the same cooling system.

you could sell both processors and get the T9500

 

I don't understand how to read the bit 15

@sean473 & wildman_33, good idea, but dtwn's comment also came to my mind..
the only deals for T9300 or T9500 are from ebay, and I don't think the prices are really good deal yet..
while my balanced cost of upgrading T5270 all the way to T7700 is $20,
I don't think I'll be able to handle the cost of upgrading to ebay's T9300/T9500
(all my cpus I got from local forum)

 

Just looked at Ebay, T9300 seems to going for about 175-200, while the T9500 seems to be going for 225 and above. For the extra 0.1 Ghz, I would go with the T9300. Which I did, actually, when I upgraded my old laptop's CPU.

How much are they going for locally?

 

CA23 = BIT 15 is Locked.

 

well it's true that the combined price of T7700 and T8100 will overcome the price of T9300/T9500.. but the deal just ain't right..
If I want that I would go straight to ebay without buying the "good deal" T8100.
meanwhile with this T8100 in my hand, it will be like a "zero cost" of switching the T7700 with T8100 .. or maybe get profit instead

well, since it's not an Extreme processor it will likely be locked

 

from this list, T7700 seems better than T8100:
http://www.notebookcheck.net/Intel-Core-2-Duo-Notebook-Processor.7322.0.html
http://www.notebookcheck.com/Mobile-Prozessoren-Benchmarkliste.1809.0.html

 

Thanks! I've seen the rating..
And it's true T7700 takes higher place than T8100, because of it's raw power alone.
As you can see in wPrime test, it's 4 seconds difference on the same system..
but T8100 is wayy cooler and it uses 45nm for advantage

so for the loss of 0.3 GHz and 1MB L2 cache, but gain new technology and efficiency, is it generally an upgrade, or downgrade ?? Comments are welcome

I'll see if I can live with that 0.3GHz difference in a few days..
(turning from T5270 to T7250 to T7700 does have advantages to me --faster compile time-- )

@vostro1400user, do you know Vostro 1400's PLL ??

 

SLG8LP550V

 

wow Thanks! rep is on the way..
have you tried to OC ? I guess we have h/w TME enabled right?

 

never tried in this PLL, many got failed(FSB can't be changed by software for this chip). here is details of this PLL:

 

Looks like pin 32 is the TME pin.

You can probably overclock (after a PLL pin mod).

Might be worth taking apart your notebook to check it out. If you could post a photo it would be great.

Full datasheet for the PLL can be found here:
http://www.silego.com/resources/pdf/xSLG8LP550r10_05152007.pdf

I think it would not be too hard to overclock if you have this PLL.

Let me know if you need some help. Also check out the setfsb website. You can email Abo (creator of setfsb) and give him a link to your PLL and he will probably add support for it.

 

wow I'm noob for this.

How do we check which pin is TME ?
and does re-routing the TME pin to ground disable the TME instantly?

Thanks

 

some already tried and failed to get 1400 bootup.

 

Yes, when you connect the TME pin to GND it will let you overclock.

As you can see in the photo, there is a dot on the top right corner.
That shows where pin 1 is. Just count anti-clockwise until you get to pin 32.
Check if there is a track from pin 32 to a resistor.

 

that's a bad news ..

 

Don't know why, are you sure that the connection to GND was good?
Was it checked with a DMM?

Because the first time I tried the mod I didn't solder the resistor properly so the notebook didn't boot. But after a second try (I added more solder) it booted up fine.

Make sure you disconnect the pin from Vdd before you connect it to GND.

 

another dumb question, how to find a GND point ??

 

according to the report, the tester connects 45pin to ground with 6.4k resistance, and CPU_0 and CPU_1 did generate 258-268MHz but the laptop just failed to boot up.

 

Nice Clock Generator, a quick look at the Datasheet leads me to think:

You'll want to check Bit 5 of Control Register 3 to make sure it's 0 = PCI_2 Output Disabled.

As that's the same as the TME PIN( 32 ), otherwise your system maybe using PCI_2 Output to drive some Devices, and won't boot or Crash soon after POST.

 

Ok, that's a completely different mod.
the reason it failed was because the ram couldn't handle the speed. Flashing the ram with thaiphoon burner before the mod would have made it work.

The mod I suggest will work. I am talking about setting TME = 0, then using setfsb to overclock.
This is more likely to work. Definatly worth a try.

Use a DMM and test against the chassis.
Or just look at the pinout of the PLL, you can see many GND pins.

Could you take a photo of the TME pin for me, that last photo was not at the right angle.

 

I'll see what I can do.. never had open the mobo though..

 

Really, when I want to change my CPU I have to take my notebook completely apart and flip the mobo over.

 

The vostro 1400 has bottom panel for cpu and heatsink direct access

but I know what you said, I got the T7250 into Toshiba Satellite L300,
and it's a complete disassemble .. (well, not the display though)

 

@moral hazard: I haven't got a chance to open up my vostro since I'm at work on it.

Anyway.. I found a local forum member that is selling his T9300..
can anyone recommend me a max price for used T9300??
I may ended up with that instead .. LOL

Thanks in advance!

 

For a non-ES T9300 i wouldnt pay more than $200.

Keep an eye in the Marketplace, ive seem better cpu's go for dirt cheap.

 

ok I got the T9300 LOL so for this topic, case is closed

I'm gonna post the results later for undervolt and wPrime/Fritz..
it's wayyy cooler than the hot merom ..

Thank You all for the help!

moral hazard & vostro1400user, I'll continue the vostro 1400 OC in PLL mod thread going to get a better camera for pictures first! Thanks!

 

first post updated with the result of undervolt and benchmark

really happy to have T9300! LOL make my day

here's the blurry picture

Left: T7700, Right: T9300

 

centre silvery part of T9300 looks smaller... i wonder why!

 

Keep in mind that the T9300 has a half multiplier that RMclock wont detect.

 

it's because T7700 is 65nm, and T9300 is 45nm

yes , I'm using the "check the IDA FID, but uncheck the Engange IDA in Advanced Setting" .. I'm running a smooth stable 12.5x on load
and there's no spikes in monitoring so I think I'm good to go?

here's my setting :

*but since I'm using it on power now, I don't use the superLFM so my idle is @1.2GHz
but it's still idle @25-26C yay!

when testing Orthos:


*the clock in cpuz got hidden not on purpose, but it's really 12.5x @2.5GHz

 

So what was your stock voltage for the 12.5 multi?

 

Thank goodness I always took screenshot of new processor.. because I forgot the stock Voltage LOL
*I got BSOD on 0.975V, so stable VID is 1.000V

here ya go:

 

So what is the max voltage you can set with RMclock?

I think you wont get much of a stable overclock unless you get to 1.2V.

But here is what you might get at 1.138V:
http://valid.canardpc.com/show_oc.php?id=651513

 

the max is 1.225 V !! dang I can't wait to get my hands on PLL mod
I took some pictures with my old camera the other day but the results are so blurry I can't see anything