First of all, it's not a problem
. It's rather an option
to have, but keep on reading.
You're in the right place, and you're also lucky, because fortunately I was researching PAT with Snod Blatter
long enough... heh.
Performance mode, this PAT stuff
is a very sensitive
part of Intel's, and it was/is/ always will be. Why? Because it boosts performance, and it was technically introduced with the i875 chipset, but the issue was that certain developers (ASUS) also included an option in BIOS which would enabled PAT even with
i865 BIOS. Then a lot of people were intrigued, what the heck is the difference between i865/i875 chipsets, why was incorporated in i865 PAT, but disabled, and then having the same architecture, also incorporated, and enabled with the i875, but then released officially. I'm still sure that it was a bit of marketing technique used by Intel, and maybe even a few more secrets of about which I am not aware of, obviously.
Well, let's start with the basics. What is PAT, and why IS
is so important?!
First of all, there are 3 types of Performance Mode, one is disabled
, second is partially enabled
, and the third one is the fully enabled
. Now, the thing is that CPU-Z's identification is not perfect, it detects partially enabled and also fully enabled, just as enabled
, even though there is a huge difference between partially and fully enabled - having PAT. So, now you may ask, how to find out which of that setting have you got, the answer is CTIAW
(google for it, it's a little, freeware tool, which detects and reports disabled, partially enabled, fully enabled PATs).
Second, as it is obvious, having PAT fully enabled is better than partially, but of course, partial one is also better than having it disabled.
Third, having PAT partially enabled gives you around 3% performance boost, having fully enabled gives you around 8-10%, but of course results will
vary. It is nice to have of course fully enabled PAT, when possible, there will be a performance gain anyway.
Analyzing and comparing i875 chipset with the i865, we'd tell that the difference in i875 chipset, when PAT is enabled or not is that the 533MHZ FSB bootstrap is forced, timings are at 2-2-2-5, FSB is 200MHz (quad pumped 800MHz), and also TURBO is enabled. If all of these 4 (bootstrap, timings, fsb, turbo) attributes were matched, FULL PAT was activated. This happened with all i875 chipsets, and it WAS officially included by every motherboard manufacturer in BIOS, the Performance MODE
option. If one of these attributes weren't matched, then Partial PAT was enabled. Crystal clear, right? One of these i875 boards is the Asus P4C800. All was nice and beautiful, but then ASUS (yay!) figured out that it is possible to include PAT even with the bit older i865 chipsets, by forcing the bootstrap to the 533MHz; so what they've done is, set these options in BIOS, and then released a newer revisions for those i865's. I'm absolutely sure you all have heard about the mighty, P4P800 boards, good old overclocker board, hehe-- actually these are socket 478 based boards, made by ASUS with these new revisions, including PAT option in BIOS, with i865 chipset. So it was
possible, having full PAT with i865 chipsets also.
I'm sure that you've also heard about overclockers, who always ran their systems on the bleedin' edge, nah-- these people found out, that having PAT enabled with 200MHz FSB, 2-2-2-5, TURBO enabled and 533MHz bootstrap WAS faster than PAT enabled with 210MHz FSB (for example), 2-2-2-5, TURBO. Why?! This is when they've actually found out the difference between FULL and PARTIAL PAT. FULL PAT, is ONLY when there is the 533MHZ bootstrap, and that is ONLY when FSB is 200MHz, timings are 2-2-2-5 and TURBO is enabled. But, then they've been even more intrigued, what the heck-- we run our systems overclocked, at insanely high FSB's, how can we still ENJOY having PAT FULLY ENABLED. This is when certain people (props to TONY aka Bigtoe) found out, that with easy
bios modding, you could mod your BIOS, to force the 533MHz bootstrap when booting, to enabled PAT FULLY, and then setting back your overclocked settings. This was possible with a P4P8X bios modded and mixed with the original P4P800 one, of course, with a lot of hard work. But then again, having PAT FULLY enabled on stock settings (200MHz, 2-2-2-5, Turbo - are stock settings) already increased the northbridge's temps to their peak values. So, having an overclocked system @ 250MHz, 2-2-2-5, Turbo and also forcing PAT FULLY enabled with that Bigtoe BIOS modding absolutely raised a northbridge's temps to extreme values, so extreme cooling was needed- of course.
Now, as you'd imagine, Intel didn't really enjoyed
watching all these happening with their old i865 chipsets, and a lot of people were rather buying newer revisions of p4p800 asus boards than newer i875's based boards (like p4c800). Anyway, you've understood the basics about PAT, hopefully.
Sorry, for explaining PAT in so many details, and too many technical stuff, and history, but simply I couldn't stop myself.
Let's analyze your situation now. What motherboard you've got, give us your EXACT details, specifications. Are you overclocking? Are you running on stock? If on stock, then whatever your chipset you've got you CAN enabled Performance Mode in BIOS. Just enabled it, and you'll gain performance boost-- like 8-10%. If you're overclocking, and want to have fun-- like bios-modding, and such, check out the following articles: Bigtoe's Trick
, PAT over 200MHz
, same hack
. Bios modding IS
dangerous, so be careful, if you intend to do it.
To answer your questions:
a.> You can enable it, while going in BIOS, searching for Performance mode, and selecting ENABLED and/or TURBO.
b.> It means that you don't have PAT, that means you're in like ~3-10% performance loss. Enable it, and enjoy.
Good luck, MadHyeNa.