4890 underperforming

[almighty15]

My XFX 4890 has an under average Vantage score, it gets roughly ~8000 GPU points with the performance setting as oposed to the ~10000 points it should be getting.

I've tried it with 2 different CPU's, a Pentium Dual Core E6300 and a Athlon 2 x2 250. The Pentium E6300 was tried from speeds of 2.8Ghz all the way up to 4.2Ghz and the Athlon x2 was tried from 3Ghz upto 3.6Ghz and no matter what the CPU clock the GPU score remained at ~8000 points.

However I chucked it into my uncles rig that houses a stock clocked core i7 and in his system it got the ~10000 points that it should be getting!

Why won't it in my system?

There's no way a 3.6Ghz Athlon x2 and a 4.2Ghz Wolfdale powered E6300 is bottlnecking a single stock clocked 4890. Both system were running the same drivers as well

Any ideas?

 

[4T5]

What PSU's do the two systems have & how is the case cooling ?

 

[almighty15]

We both have 1Kw PSU's and both systems have water cooled CPU's.

My case has better air flow as well.

 

[Deleted member 76686]

How does it fair in real games and perhaps other benchmarks?

 

[asoxedri]

mine gets 9800 ish points with Q6700 @ 3ghz. perhaps its down to cpu and motherboard limitations? i think mine is limited by motherboard.

 

[blaineoliver]

Not enough ram bandwidth i would say, get the FSB nice and high.

 

[buttkinz]

does running a quad make a difference?

 

[almighty15]

Not enough ram bandwidth i would say, get the FSB nice and high.

RAM doesn't make a 2000 point difference and besides my RAM was at 1150Mhz @ 5-5-5-15 and my FSB was at 450Mhz so I wasn't bandwidth limited.

 

[Clairvoyant]

Just ran mine and got 10449