2D quality in Parhelia vs. P750 vs. P650

[alexudal]

is there any? maybe in 2d speed? maybe in overclockability, with raising PCI clock to 143, 150 Hz included?

[Fluff]

I wouldnt have thought so. Maybe the Parhelia might have slightly better components / board layout.

[PAugustin]

I own a P8X at home and a P650 at work. I don't think there are any differences regarding image quality. I can't be 100% certain because I don't have the same monitors but I think the cards share the same IQ...

[alexudal]

? cards are different...

Theoretically, I can agree on 2D "static" quality: obviously RAMDACs and those famous 5th order filters are the same.
2D speed must be different: Parhelia has twice the memory bus bandwidth, my question was how much different? Obviously, not much, but, say, underclocked G400 leaves smeary trails when, say, some window is dragged across the screen fast enough, or some blur/parazite pixelation in DVD movies, so the question was how much better Parhelia is in these tests than P750/P650?

Slightly better components? I don't get it: nobody puts faulty Parhelia GPU into P750/P650, they are the same. I bet even that infamous banding is the same in P750/P650. Sloppy board layout for P750/750? They are not nVidia/ATi, they don't outsource their reference layout to some obscure Chinese village crafters.

So, apart from 3D speed (which I trust is nothing to write mom about for all three boards when in newest games, anyway) is there any Parhelia edge over P750/P750 in 2D worth of ~$120 to ~$160 price difference? Has anyone seen some color/sharpness/movements representative DVDs using these boards, to tell the diff?

[PAugustin]

I don't think you will see any difference in 2D. The only differences I see are there because one card has 2 crappy Samsung monitors (the P650) and the other one has a Sony and an Eizo (Parhelia).

I haven't felt any slowdonw or experienced any window trail on the screen, even if I drag a window from one screen to the other one.

[Kruzin]

Re: ? cards are different...

Originally posted by alexudal
Slightly better components? I don't get it: nobody puts faulty Parhelia GPU into P750/P650, they are the same. I bet even that infamous banding is the same in P750/P650. Sloppy board layout for P750/750? They are not nVidia/ATi, they don't outsource their reference layout to some obscure Chinese village crafters.

P650 and 750 are built on the Parhelia-LX chip, a "trimmed down" version of the Parhelia chip. Fewer pipelines, 1/2 the bandwidth.
The board layout is totally different. There is very little in common component-wise between a full-blown Parhelia and P series Millenniums

The banding and FAA issues are fixed on the P-LX chips, as they are on the newer P8x chips

[Kruzin]

Matrox's published comparison of the cards:

http://www.matrox.com/mga/products/comp_chart/gseries_pseries_parhelia.cfm