- 61 months ago
I just selected and bought my chip: a Pentium G3220T, 35 W, $50. I thought someone else might get value out of this analysis I did.
I was aiming for the cheapest low-TDP Haswell I could possibly get. At first I was eyeing the Celeron G1820T, because passmark.com listed it on their chart "All-time [best] Price [for] Performance". It seems $44 is the going rate for a used G1820T on eBay (free shipping), and that's what I was about to buy.
But then I saw a few other Haswell models on eBay too. Turns out there are 35 W Pentiums as well, which have a 3 MB L3 cache (vs. the Celeron's 2 MB). There are two classes of 35 W Pentiums, one for DDR 3-1333 and another for DDR3-1600. I focused on the DDR3-1333 class, and really only one chip was available for sale anywhere: the G3220T. It goes for $49.95 (shipped) on eBay (used).
I compared the two and determined for myself that the Pentium G3220T is a better value than the Celeron G1820T.
To calculate price per performance for each, I divided the price by the passmark value. Then I subtracted the two $/passmark values and divided that by the G1820T's $/passmark, to determine what percentage premium $/passmark I'm paying extra for the G3220T. It came out to be about 8% more in $/passmark for the G3220T.
Then I went back to the original passmark ratings for each chip, subtracted them, and divided them by the G1820T's passmark value, in order to determine what percentage premium in performance the G3220T has. It came out to about 9%.
So, I figured, I'm paying 8% more money in exchange for 9% more performance. That sounded like a good deal to me.
(I also compared the higher-end Pentium G3450T (the fastest 35 W Pentium, w/DDR3-1600) to the G1820T. It was something like 20% higher cost for %12 more performance. I'm going for value, so I decided against that hike.)
Sources: http://en.wikipedia.org/wiki/Haswell_%28microarchitecture%29#Desktop_processors passmark.com ebay.com Google Shopping