As far as the heat sink goes, that shouldn't be a problem. As for the PSU, if you are lucky, you might get 350w. Depending on the graphics set up I would go to at least 500w and to give yourself some room 600w - 750w or more if your budget can handle it. OCing is trickey business whether it is OCing the CPU or the GPU. The PSU would have more of an effect on a major graphics upgrade or OCing than OCing the CPU. I went from 2.66 Ghz to 3.4 Ghz and 533 Mhz FSB to 800 Mhz FSB on this thing with no adverse effects. I had a 300w PSU. I did go to a 500w PSU after I went from the onboard graphics to a 7600 GS GeForce PCI-E card. The price sounds good. I checked it out but couldn't find out anything about the PSU. If all you are going to do is OC the CPU, I don't see a problem. If you want to upgrade the graphics down the road and you only have a 300w - 350w PSU in it, then you should go to at least a 500w PSU. You can't run SLI due only one PCI-E 16x slot. coastie65

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eMachines T5212.... Intel Pentium D 945 3.4Ghz..... evga 9800 GT 512 Mb PCI-E video card..... Realtec HD audio......2 Gb Crucial 667 Mhz DDR2 memory..... Lite on CD RW; DVD RW, DL,& Lightscribe optical drive...... Windows XP MCE 2005....... Antec Basiq 500w PSU......200 Gb Parallel ATA HDD.........Samsung 22" WS SyncMaster 2243BWX Monitor.

Hi GuardianFlash, Sli is running two PCI-E video cards in tandem. You need two PCI-E 16x slots in order to do this. No biggie, I'm getting along just fine with one GeForce 8600 Gt card. There are some who will disagree. These are the ones who have to have the biggest and baddest rig on the planet. I think you'll find that the Core 2 Quad will run just fine without OCing. If at sometime you want to go to 3.0 Ghz, then just buy a new processor at that speed. That is what I've done. This thing came with a Pentium D at 2.66 Ghz and I bought a Pentium D at 3.0 Ghz. I am considering going to a 3.4 Ghz Pentium D, but they are rather pricey ($200+ USD). I haven't checked the Core 2 Quads to see what is available. Again, I think you'll find that the Core 2 Quad Q6600 will do quite well. coastie65

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eMachines T5212.... Intel Pentium D 945 3.4Ghz..... evga 9800 GT 512 Mb PCI-E video card..... Realtec HD audio......2 Gb Crucial 667 Mhz DDR2 memory..... Lite on CD RW; DVD RW, DL,& Lightscribe optical drive...... Windows XP MCE 2005....... Antec Basiq 500w PSU......200 Gb Parallel ATA HDD.........Samsung 22" WS SyncMaster 2243BWX Monitor.

There are two schools of thought on OC'ing a CPU. There are those who adovocate it, but then since the CPU is not designed for the higher speeds you get into heat situation. The heatsink and fan are designed for the CPU speed that the PC was shipped at, and may need to be replaced.

The other school states basically - if you want a faster processor, buy a faster processor.

Many have what I call a "crippled BIOS" in that most of the tweaking adjustments seen on the BIOS on the after market boards are not present in the adjustments available in the BIOS on OEM boards. I have an HP Media Center machine with an ASUS board that is similar to the aftermarket version except for the BIOS adjustments (it has very few) and the clock speed and FSB frequency are not among them. I believe the same is true of the majority of Dell's, and would not be surprised if Acer is the same. They don't wan the customer OC'ing the machine, burning up the processor, and then calling tech support about fixing the problem under warranty.

Even upgrading the processor on the MB may not be possible as it may not recognize the new processor requirements. You would have to find out from someone with experience with this brand and model. Modifying a manufactured PC in this manner is more of a challenge than modifying an aftermarket board or a machine assembled by a niche or botique supplier who basically assembles a computer to order from aftermarket boards and other specified parts to the customers requirements.

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Thanks to Solar Wings for the special siggy.