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Core Duo Upgradable to Merom - Page 2

post #21 of 26
Mind you we've had no confirmation from Dell that they will release the Bios required to pop the Merom in...

However that said, Intel just dropped a Merom into a current Core duo laptop and booted up. They did not in the article I read say what machine that was. Given they are sharing pants with Dell, I'd take bets it was a Dell.

What you will have to deal with are the 2gb ram limit (maybe unless the bios fixes this - since the 945M chipset can technically manage 4gb in the whitepaper) and the 667 memory speed limit. Santa Rosa the next gen Centrino chipset (mid 2007) will get an 800 FSB for Merom. I would suspect that 667 speed upgrades of Merom will probably dry up after late 2007. That should be more than fine for a notebook you purchase now, but that's my $.02.

Speed ranges were 1.86 to 2.33, so don't expect to throw a 2.67 (which was in the demo that everyone is showing benchmarks on) into your laptop. However 2.67 beat a 2.8 X2, so it's reasonable to think that a 2.33 isn't exactly going to be a slouch. And if you see one or two grades above that through 2007, and you wait that long (good luck on that patience level) then you'll have a might fast machine that you got to use now.

Intel and Dell benefit by not having you wait till the Fall. You benefit from great tech now. Santa Rosa will also bring Robson tech (speeding up the hardrive via flash) which is a mighty nice perk so don't spend ALL your pennies on this first machine

Remember also that 5-7mo should bring the G80 which is Nvidia's real solid DX10 chip (aww DX9 lived so long too...) You'll probably want DX10 for Vista, but you can live with DX9 for a couple years probably with not a lot of issues. DX10 is supposed to be noticeably faster under Vista because DX9 will be "interpreted" by the OS into DX10 commands where DX10 will be native. Nvidia AND ATI driver writers have promised to try and rectify this. Since Vista doesn't let vid drivers get away with as much as in XP, it is uncertain if they will be able to overcome the slower DX9 interpretation.

Remember the memory limit. The footprint of Vista is 4x (800mb) what the footprint of XP is in memory. Couple that with Microsoft saying that a 2gb machine under Vista will perform like a 1gb machine today and you can begin to see how easily even a laptop (at least for gamers) could really want to have 4gb in it (BF2 anyone?) So bear in mind the penalties and then realize Intel is providing a way to have a machine now and then step up 20-30% in performance and get 64 bit just by a plug in upgrade. That is a very, very nice perk.

Food for thought!
post #22 of 26
The idea of upgrading CPUs and video cards is always appealing, but in reality, some other tech components will move forward and you'll want to buy a new machine after a year.

The Santa Rosa platform actually looks pretty good to me, so I'll probably dump my 9400 around 1H 2007 and get whatever looks good on the new platform at that time.

I've always wanted to boot from flash disk and have built-in MIMO WiFi. Looks like I'll finally get those features as part of Santa Rosa.
post #23 of 26
whats is a built-in MIMO WiFi?
post #24 of 26
Quote:
Originally Posted by TriX
whats is a built-in MIMO WiFi?
Intel's next mini PCI-express wireless card will be 802.11n (= MIMO = multiple input, multiple output = higher bandwidth and better range).
post #25 of 26
Thread Starter 
Quote:
Originally Posted by 21st Hermit
Okay smarty pants.

Now, help me to understand the difference between a simple instruction and a high instruction?

Hermit
High instructions sets are "MMX, SSE, SSE2, SSE3, and EM64T" while simple instructions are basic x86 16-bit and x86 32-bit instructions. This means that the additional high instructions are the basis for Merom providing 20% more performance in higher applications and games over Yonah.

Quote:
Originally Posted by Dellbert
Edit: OK, I found some stuff on Merom vs Yonah.

Yonah has a 12-stage pipeline 3 instructions wide.

Merom has a 14-stage pipeline 4 instructions wide.
Dellbert, Yonah actually has a 14-stage pipeline also.... but the Merom pipelines are "wider" to support the potential to process 4 full instructions per clock over the Yonah's 3 instructions per clock. The "thinner" pipelines of the Yonah can only handle 2 simple instructions and 1 high instruction per clock. The Merom will be "able" to process 4 high instructions per clock but in most scenario's will be processing 2 simple and 2 high instructions at any one time to allow background applications to run without holding back your foreground primary application at the time.

In a scenario where you load directly into a dedicated shell - let's say you create a WinPE partition for loading up your favorite game and just the needed drivers - you would have 1 primary application and no background processes asking for CPU cycles, and could open all 4 instructions per clock for high instructions sets like MMX and SSE2 to make gaming even faster.

Quote:
Originally Posted by stuckinasquare3
i'd like to hear about this demo b/c that would prove beyond a shadow of a doubt.
At IDF Intel demo'd the benefit of Merom over Yonah to the press by using an existing Yonah laptop on the market and just changing out the CPU and re-running the exact same benchmarks. This showed games @ 104fps jumping to 132fps, and CPU benchmarks showing about 20.3% higher scores.

So, if your BIOS shows support for Merom extensions (i.e. 64-bit and VT) then your BIOS is most likely the full featured BIOS that is being used for the ICM version of Merom.

Merom in SantaRosa will go by a different name than Centrino Duo 64 and Core Duo 64.


I hope everyone finds this thread to be useful and a good learning experience. =)
post #26 of 26
Quote:
Originally Posted by JaxChris
Dellbert, Yonah actually has a 14-stage pipeline also
Couldn't tell you for sure, but I read about the differences here:

http://www.anandtech.com/tradeshows/showdoc.aspx?i=2715

We'll dive into the architecture of Merom tomorrow, but until then here's what we do know. Merom, like Conroe, features a 14-stage integer pipeline, up from the 12-stages in Yonah.
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