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29 March 2008

AMD B3 Phenom X4 9850 benchmarked Part1

AMD Phenom is back with not 1, not 2, not 3, but 7 fresh from the oven models. The infamous TLB bug gone, and the B3s are renamed as 9x50. In this extract of the article from Anandtech, we shall see how they perform against Intel's offerings as well as their B2 siblings.

Cores Stepping Clock Speed TDP L2 Cache L3 Cache 1 Ku Price
AMD Phenom X4 9850 4 B3 2.5GHz 125W 2MB 2MB $235
AMD Phenom X4 9750 4 B3 2.4GHz 125W 2MB 2MB $215
AMD Phenom X4 9750* 4 B3 2.4GHz 95W 2MB 2MB $???
AMD Phenom X4 9650* 4 B3 2.3GHz 95W 2MB 2MB $???
AMD Phenom X4 9550 4 B3 2.2GHz 95W 2MB 2MB $195
AMD Phenom X4 9100e* 4 B2 1.8GHz 65W 2MB 2MB ~$200
AMD Phenom X3 8600* 3 B2 2.3GHz 95W 1.5MB 2MB ~$175
AMD Phenom X3 8400* 3 B2 2.1GHz 95W 1.5MB 2MB ~$150
*OEM only

Phenom X4 9850

The 9850, being the top of the line B3 Phenoms, is a "Black Edition" part, meaning it has an unlocked multiplier. It is also the first AMD processor to have its L3/Northbridge/Memory Controller running at 2.0Ghz.


Overclocking wise, it was slightly better than any previous attempts, it managed to stabilize @ 2.8Ghz with a voltage boost.

Performance Impact of the TLB Bug

SYSMark 2007 DivX CineBench R10 3dsmax 9 WinRAR
AMD Phenom 9600 (B2 Stepping) - TLB Fix Disabled 117 74.3 fps 7396 7.20 1348 KB/s
AMD Phenom 9600 (B2 Stepping) - TLB Fix Enabled 105 72.0 fps 7031 6.47 367 KB/s
Performance Impact -10.3% -3.1% -4.9% -10.1% -72.8%

As you can see, there are loss in performance in all areas. Running Winrar with the TBL fix enabled is as good as disabling 3 out of the 4 cores.

Test Platform

CPU: AMD Phenom 9850 (2.5GHz)
AMD Phenom 9750 (2.4GHz)
AMD Phenom 9550 (2.2GHz)
AMD Phenom 9600 (2.3GHz)
AMD Phenom 9500 (2.2GHz)
Intel Core 2 Quad Q9300 (2.50GHz/1333MHz)
Intel Core 2 Quad Q6600 (2.40GHz/1066MHz)
Intel Core 2 Duo E8200 (2.66GHz/1333MHz)
Intel Core 2 Duo E6750 (2.66GHz/1333MHz)
Motherboard: ASUS P5E3 Deluxe (X38)
MSI K9A2 Platinum (790FX)
Chipset Drivers: Intel (Intel)
AMD Catalyst 8.3
Hard Disk: Western Digital Raptor 150GB
Memory: Corsair XMS2 DDR2-800 4-4-4-12 (1GB x 2)
Corsair XMS3 DDR3-1066 7-7-7-20 (1GB x 2)
Video Card: eVGA GeForce 8800 GT SSC
Video Drivers: NVIDIA ForceWare 169.25
Desktop Resolution: 1920 x 1200
OS: Windows Vista Ultimate 32-bit

Next Page

Part 1: Introduction, Overclocking & Test Platform
Part 2: Benchmarks
Part 3: Gaming & Power Consumption


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