AMD's B3 stepping Phenom gets tested

By on March 12, 2008, 5:49 PM
Samples of AMD’s long awaited B3 stepping quad-core Opteron finally made its way to system integrators earlier this month, fixing the translation lookaside buffer (TLB) erratum that caused the company to stop shipments of the server chip late last year. Phenoms affected by the erratum, however, continued to ship together with a BIOS fix – though the workaround supposedly hampered performance considerably in some tasks.

Well, the folks at AnandTech have managed to get their hands on a 2.2GHz engineering sample B3 stepping Phenom and ran a few tests against a B2 stepping Phenom 9600 to get an idea of how much of a performance hit the BIOS TLB fix incurs. The highest performance impact was on a WinRAR benchmark, with a drop of over 70 percent. The results show the B3 Phenom actually performing slightly better than the B2 chip with the fix disabled (1357KB/s versus 1348KB/s), while the B2 chip with the BIOS fix enabled scored a meager 365KB/s. Check out the complete report here.

User Comments: 3

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howzz1854 said:
oh that is just the biggest FUBAR ever. how can they screw up this BIG. i think it's time for them to liquidate and start a new name and company. j/k
peas said:
Intel has screwups just as bad. x86 CPUs are very complex products and it's impossible to find & fix every single bug.
thomasxstewart said:
YABOO B3 is only slightly better than PREVIOUS ISSUED b2? Entire system had big problem, AMD issued white enginneering paper without specifiying exact voltages & I mean how plural of them? So its hunt & guess world, some how this is more CRASH & BURN TECHnology case,AMD claims to be neck & neck with Intel in Nahalem area. Certainly barcelona is big mistake right now, from what I've read.Signed:PHYSICIAN THOMAS STEWART VON DRASHEK M.D.
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