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  #21 (permalink)  
Old 19th June, 2013, 12:26 PM
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Yes, it's in part a seller language problem, the rest appears a complete seller misunderstanding of the 4670 specs. I'm noticing it's not that unusual to see Mtps referred to as MHz, the source of my confusion. Since these memory chips are spec'd at 500MHz (Samsung data sheet), 800MHz is clearly wrong. I'm left wondering if I'd bought their 4670 version instead, whether there'd be any actual difference at all (outside of a $15 higher price).

I'm also noticing that video card reviewers don't seem to think anything of a GPU running at 70C, or even 80C. If those really are considered reasonable temps for a modern GPU, then my Zalman purchase was virtually a complete waste of $25. Ah, well, my purpose was to get my gamer up to pretty much the highest graphics performance available for AGP, and so I'm probably pretty much there shy of a real GDDR3 4670.
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Last edited by TrevorS; 19th June, 2013 at 12:54 PM.
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  #22 (permalink)  
Old 19th June, 2013, 05:24 PM
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whoa, AGP huh? i had no idea you were still running AGP!!!
Crazy!

I would have known if I looked up those cards.
I remember doing one last upgrade on an older machine with a Radeon 3850 512 RAM 256-bit
Not a bad card.. a few years later I traded it for an Intel Core 2 Duo.
But that was the last AGP upgrade I ever made for that old machine.

[edit]Duh, I forget the title of this thread!
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Last edited by booman; 19th June, 2013 at 06:56 PM.
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  #23 (permalink)  
Old 19th June, 2013, 06:32 PM
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Quote:
Originally Posted by TrevorS View Post
Yes, it's in part a seller language problem, the rest appears a complete seller misunderstanding of the 4670 specs. I'm noticing it's not that unusual to see Mtps referred to as MHz, the source of my confusion. Since these memory chips are spec'd at 500MHz (Samsung data sheet), 800MHz is clearly wrong. I'm left wondering if I'd bought their 4670 version instead, whether there'd be any actual difference at all (outside of a $15 higher price).

I'm also noticing that video card reviewers don't seem to think anything of a GPU running at 70C, or even 80C. If those really are considered reasonable temps for a modern GPU, then my Zalman purchase was virtually a complete waste of $25. Ah, well, my purpose was to get my gamer up to pretty much the highest graphics performance available for AGP, and so I'm probably pretty much there shy of a real GDDR3 4670.
Describing it as 800 MHz is not incorrect, but it is an incomplete description. All that says is that something happens 800 million times per second.

In the case of DDR memory it means 800 million data words are transferred every second, two per clock cycle.

Describing it as 800 MT/s is still short of the mark, because it raises the question of what is transferred 800 million times per second?

If they just quoted the memory's maximum bandwidth, things would be easier to follow. 6.4 GB/s in the case of DDR2-800.
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Last edited by danrok; 19th June, 2013 at 06:33 PM.
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  #24 (permalink)  
Old 19th June, 2013, 07:55 PM
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The PCIe and AGP versions of the 4650 had same specs, but the AGP 4670 MEM clock (667MHz) was reigned in relative to the PCIe version (1000MHz), I presume that was due to the bandwidth difference. So, I guess my card is falling short some 162MHz of memory clock. I'll have to try the clocks again, see if they can climb just a little higher .

I never had a PCIe motherboard in the house until four or five weeks ago when I decided to build a "piledriver" video cruncher (first new machine in ten years thread in AMD motherboards). Bought a refurb 6670 for it, but turned out to be DOA. Bought a 7770 which worked fine, but just returned it today, replaced it with a freebie 5450.

The games I pickup are mostly "classics", most recent being "Crysis" (arrived used from an Amazon seller a week ago). As a 2007 release, my clocked 4650 is probably adequate, especially since I normally run 1024x768 on my 17" CRT (provides a good perch for my 5.1 center channel )! Nope, no bragging rights for my gamer (though it does have a nice Audigy2 sound card and Logitech speaker system). If I ever find it running out of gas for titles I want to spin, I'll just have to pick up a PCIe motherboard and accoutrements. Still, no rush, I've plenty of "classics" I haven't even opened yet !
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Last edited by TrevorS; 19th June, 2013 at 08:03 PM.
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  #25 (permalink)  
Old 19th June, 2013, 08:16 PM
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Quote:
Originally Posted by danrok View Post
Describing it as 800 MHz is not incorrect, but it is an incomplete description. All that says is that something happens 800 million times per second.

In the case of DDR memory it means 800 million data words are transferred every second, two per clock cycle.

Describing it as 800 MT/s is still short of the mark, because it raises the question of what is transferred 800 million times per second?

If they just quoted the memory's maximum bandwidth, things would be easier to follow. 6.4 GB/s in the case of DDR2-800.
Can't say I entirely agree. Given the context, the description 800MHz is flatly misleading whereas 800Mtps is sufficiently descriptive, each transfer clearly being the width of the memory bus. To specify the memory bandwidth is really yet another piece of information separate from the other two, but true, it best describes the memory performance, however, I don't always see that number advertized.
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Last edited by TrevorS; 19th June, 2013 at 08:25 PM.
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