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RV740  (Source: Guru of 3D)

  (Source: Guru of 3D)
Benchmarks place it comfortably between the HD4830 and HD4850

Despite an uncharacteristically tight-lipped stance from ATI on its first 40nm parts, hardware review website Guru of 3D has managed to secure a sample of an RV740-based graphics card and put it through the paces. At first glance, the specifications suggest that it is little more than a shrunken RV770LE core, but a closer look reveals several improvements

According to the preview published today, the GPU boasts 640 shaders, 32 TMUs, and 16 ROPs; all the same as the RV770LE. However, the core and memory clocks both receive a significant bump, up from 575MHz to 650MHz and 1800MHz GDDR3 to 3200MHz GDDR5 respectively. The substantial boost in memory frequency works to offset the performance difference incurred by the smaller 128-bit memory bus on the RV740, which brings the reported math processing rate for the GPU up to 900 GigaFLOPS.

Every single benchmark result published in the review places the RV740-based card right between the existing Radeon HD4830 and HD4850 graphics cards, also from ATI. For example, at 8xMSAA and 16xAF in the popular first person shooter Left 4 Dead, the RV740 turns in 28 FPS, flanked by scores of 25 and 30FPS from the two cards at 2560x1600 resolution. The card does exhibit a significant performance drop at higher resolutions, likely the result of the 128-bit memory bus width and the relatively low 512MB of memory. Other reported benchmarks include Far Cry 2, Crysis WARHEAD, Call of Duty 5: World at War, Brothers in Arms: Hell’s Highway, and 3DMark Vantage.

MSRP for RV740-based graphics cards is expected to be $99 USD, which should make it a very attractive offering in the upper-mainstream segment. While the official name of the video card has not been released, the author of the article suspects it would be called the Radeon HD4750, which would be a logical name for a card with the given characteristics.

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A Tight Fit
By jskirwin on 2/25/2009 4:49:55 PM , Rating: 3
Every single benchmark result published in the review places the RV740-based card right between the existing Radeon HD4830 and HD4850 graphics cards, also from ATI.

In most of the review's benchmarks there were about 6 FPS difference between the 4830 and 4850. The RV740 fits right in between the two - 3 FPS more than the 4830, 3 FPS less than the 4850.

Seems like a tight fit to me for a new product.

RE: A Tight Fit
By Motoman on 2/25/2009 4:52:16 PM , Rating: 2
...IIRC, a 4850 is going for around, what, $150 now? If this thing comes in at $100 or less, at a loss of 3FPS, then the 4850 (and probably the 4830) become useless anyway.

RE: A Tight Fit
By Lonyo on 2/25/2009 7:38:30 PM , Rating: 2
If indeed the HD4830 doesn't just get removed from the product line altogether.
Why continue to make more expensive cards that perform worse?
With (presumably) improving yields on the HD4850/70 core, the 30 shouldn't be as necessary for using up failed cores, and a cheaper to manufacture (as a whole product) RV740 makes sense as a total replacement.

RE: A Tight Fit
By MonkeyPaw on 2/26/2009 7:45:07 AM , Rating: 3
This card will be cheaper to produce, thus the best to market at $100. Don't forget the RV790 is also on its way, and it's a die shrink with modest improvements. Chances are the 4830, 4850, and 4870 will all go EOL once the (mildly) faster RV790 products launch. I don't know what the RV790 products might be called--perhaps we'll see a 4950 and 4970.

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