differance between QS and ES?

is there a differance in these two I want to buy a i7 920 or 840 and I have seen several on ebay and some say QS and some say ES. Which is better? Thanks..

 

QS is supposedly a "final revision" ES... but I honestly think there isn't much difference. QS or ES chips vary from chip to chip, make sure to check with the seller that everything works.

You could search this and probably find 50 threads with more precise info.

 

as far as i'm aware:-

QS: pretty much the last revision of the ES before it goes retail; all the major kinks should have been worked out of it by now.

ES: basically what it say on the tin....it's an engineering sample; might be prone to issues.

EDIT: damn, too slow to post lol

 

i would not consider getting an ES or QS for the 920xm if i were you. some owners have experienced throttling issues (and a lack of temps sensors for others too) with these chips. many of them have returned these chips and replaced them with retail or oem versions.
i dont know if the same goes for other ES/QS core i7 quads

 

I'm fairly certain that ES processors also do not come with a warranty as they are engineering samples only, not products meant for public consumption. In any event, I'd be very careful about delving into the realm of ES procs. Not only is it illegal to sell (and some say even own) ES procs, but if you encounter a problem with it, you're basically SOL.

 

I don't know if it helps but not long ago I bought an ES Intel 5100 wifi card.It carried no warranty,had a lot of issues,and I ended up throwing it away shortly.I learned the hard way what ES meant.

 

I've used multiple ES processors--of which, my QX9300 being a QS--and I've had no issues with them. I'd suggest researching the sSpec of any ES or QS processor that you may plan to buy.

 

ES is a Engineering Sample, function will vary.
QS is a Qualifying Sample, fully functioning.

With QS they manufacturers can fully test out their hardware, cooling solutions and bios etc. It does not mean it will run cool or even be able to run full tilt on a production machine for extended periods. For this reason some QS may be better than others.

My personal opinion is with Core i7's they are really pushing the silicon. The QS versions are silicon meant to test the hardware/software and little else. They are not meant for long term use and why you see the issues.

The QX9300 was C2D based and well developed with the kinks already worked out of the silicon so the QS's are of a much better quality. The same goes for the X9100 E0 stepping. Just look at the difference between X9100 C0 and E0 should give you a good clue as to what maturity of the silicon will do.........

 

Thank you good info

 

I've had nothing but pleasant experience with ES chips. I've been using ES chips since Conroe first debuted.

 

Yeah, my Q9100 ES has been doing wonderfully. Unlocked multiplier and registers as a "Extreme Edition" processor. Overclocks to 3ghz easily with just a multiplier raise.

Everything works too...temps sensors and all!

 

ive had about 20 Es/QS chips and the only issue i have run into is that some manufacturers mother boards don't work with them. but the ships themselves worked like a charm and ive never had an issue with the chip.

 

How do you tell if you have a QS or an ES version?

 

????????????