Well, you should be 380/340 if it's a 9800 PRO.
Are you sure it isn't a PRO "lite" or non-pro, or one of those other shite versions?
Well, regardless... your core should easily clock to 380. As far as your memory though, depending on the type it is it may or may not make the 23 Mhz jump to 340.
At those speeds, I'd return it anyway. Unless you got it used for really cheap.
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Radeon 9500 (modded to PRO w/8 pixel pipelines)
AMD AthlonXP 2400+ (O/C to 2600+ with 143 fsb)
3dMark03: 3586