At first, i've no huge personal experience about different AM2/AM3 CPU generation combined with 700/800/900er Chipsets, i only have that 790FX one and mostly AM2 CPUs but now what i know or think, maybe it helps you:
- also i have an Sempron (not sure 140 or 145) but this will not recognized on my 790FX M4A79 Deluxe although on compatibly list, only black screen, but only quick tested one BIOS (but works on other boards).
- my Athlon II X2 270 Sub (Regor Cores) is about 280 BusSpeed, Sargas should be same architecture/core
- As you said other Semprons about 260-270 limited too on ambient for this TeamCup (by temps or BusSpeed?), but as i see mostly GeForce/nForce Chipsets, all Subs with more than 260MHz are with Gigabyte Boards, except these twos
The Sempron 145 @ 3986MHzscores getScoreFormatted in the HWBOT x265 Benchmark - 1080p benchmark. Bullshooterranks #95 worldwide and #33 in the hardware class. Find out more at HWBOT.
hwbot.org
The Sempron 145 @ 4362MHzscores getScoreFormatted in the HWBOT x265 Benchmark - 1080p benchmark. FoX_UAranks #81 worldwide and #21 in the hardware class. Find out more at HWBOT.
hwbot.org
- Infrareds Sub was with 890 Chipset which was designed for AM3 CPUs and DDR3
What i want to say, maybe its something about a specific combination of CPU / Board-Brand and Modell / Chipset / BIOS-Version, 700er Chipsets released before Sargas CPUs and there are differents
790FXs there are with SB700 or SB600, the early Boards had the SB600 as your DFI from the 940BE Sub (and in your case an different LPCIO/ITE Chip than most others, dont know if this matters), i dont know if there are different revisions of the 790fx chipset. have your Board ACC? But i think this was an SB7xx-only thing.
as far as I can remember about the older tests with locked CPUs, me helped on little pump up of NB / CPUNB and HT / SB voltages for higher BusSpeed, respectively some of this ones.