B.Ob. Posted May 15, 2008 Share Posted May 15, 2008 ATI Radeon 4800 Launch Details "ATI’s Radeon 4800 series will be introduced in three flavors - as 4850, 4870 and 4870 X2. The company will also offer a “4850 256MB” (as opposed to 512 MB in other versions), but this SKU is a so-called "option" and is geared towards to the OEM/ODM/SI crowd to support them with cheaper parts for the back-to-school period and beyond." Quote Link to comment Share on other sites More sharing options...
ParoxysM Posted May 15, 2008 Share Posted May 15, 2008 No wonder the 3870s are $134 @ Newegg. Quote Link to comment Share on other sites More sharing options...
PurSuiT Posted May 15, 2008 Share Posted May 15, 2008 and the x3870 x2 is not PCIe 2.0 Looks like I am waiting and getting (2) 4870 x2 cards Quote Link to comment Share on other sites More sharing options...
ParoxysM Posted May 15, 2008 Share Posted May 15, 2008 Why are the x3870x2 listed as PCIe 2.0 on newegg? ASUS EAH3870X2/G/3DHTI/1G Radeon HD 3870 X2 1GB 512-bit GDDR3 PCI Express 2.0 x16 HDCP Ready Video Card - Retail VisionTek 900228 Radeon HD 3870 X2 1GB 512-bit GDDR3 PCI Express 2.0 x16 HDCP Ready CrossFire Supported Video Card - Retail GECUBE HD3870X2-F3 Radeon HD 3870 X2 1GB 512-bit (256-bit x 2) GDDR3 PCI Express 2.0 x16 HDCP Ready CrossFire Supported Video Card - Retail Quote Link to comment Share on other sites More sharing options...
PurSuiT Posted May 15, 2008 Share Posted May 15, 2008 got me. They also state 1GB and 512Bit. both false. "Our sources explained to us that using a PCIe Gen1 controller 3870 X2 was a mistake, since the board was hungry for data and didn't sync well with this interface. Don't expect the ATI team to repeat that mistake with the 4870 X2. However, we admit that we have no idea what kind of connection two RV770 GPUs will have." Quote Link to comment Share on other sites More sharing options...
PurSuiT Posted May 15, 2008 Share Posted May 15, 2008 http://arstechnica.com/reviews/hardware/at...70x2-review.ars "ATI's decision to use a PCIe 1.1 bridge chip constrains it from advertising the 3870X2 as a "PCIe 2.0" solution, but the company claims that it tested the card with both a PCIe 1.1 and a PCIe 2.0 bridge chip and saw no significant performance difference between the two. On the manufacturing side of the equation, the PCIe 1.1 bridge chip in question is a chip that ATI's board manufacturers have worked with before, and it's less expensive (and available in greater volume) than its PCIe 2.0 counterpart." Quote Link to comment Share on other sites More sharing options...
PurSuiT Posted May 15, 2008 Share Posted May 15, 2008 "Right in between the two GPUs, there is a PLX Technology PEX 8547 bridge chip. This is basically a 48-lane PCI-Express 1.1 switch with three configurable slots – these can be configured as x1, x2, x4, x8 or x16 lanes. Naturally, AMD is using the three configurable slots as three PCI-Express x16 lanes, with one going to each GPU and the remaining x16 lane going down to the PCI-Express interconnect. Due to the point-to-point nature of PCI-Express, that's all that AMD needed to do to get CrossFire working on a single card." "We inquired about PCI-Express 2.0 support, but AMD was quick to state that the performance difference between the two on this class of graphics card is going to be less than one percent, no matter what resolution is used. In other words, the tangible real-world performance benefit of a PCI-Express 2.0 switch is going to be absolutely nothing." Quote Link to comment Share on other sites More sharing options...
ParoxysM Posted May 15, 2008 Share Posted May 15, 2008 I'm holding out for PCIe 3.4 Quote Link to comment Share on other sites More sharing options...
PurSuiT Posted May 15, 2008 Share Posted May 15, 2008 I'm holding out for PCIe 3.4 Not giving up you Vesa Local Bus until then? Quote Link to comment Share on other sites More sharing options...
B.Ob. Posted May 15, 2008 Author Share Posted May 15, 2008 Why are the x3870x2 listed as PCIe 2.0 on newegg? ASUS EAH3870X2/G/3DHTI/1G Radeon HD 3870 X2 1GB 512-bit GDDR3 PCI Express 2.0 x16 HDCP Ready Video Card - Retail VisionTek 900228 Radeon HD 3870 X2 1GB 512-bit GDDR3 PCI Express 2.0 x16 HDCP Ready CrossFire Supported Video Card - Retail GECUBE HD3870X2-F3 Radeon HD 3870 X2 1GB 512-bit (256-bit x 2) GDDR3 PCI Express 2.0 x16 HDCP Ready CrossFire Supported Video Card - Retail Marketing..... The 38xx chips are pci-e 2.0, just the bridge chip they use is NOT. Rest is total mem, total mem width, not individual chip. Quote Link to comment Share on other sites More sharing options...
DaPoets Posted May 16, 2008 Share Posted May 16, 2008 ooo new shinny Quote Link to comment Share on other sites More sharing options...
B.Ob. Posted May 19, 2008 Author Share Posted May 19, 2008 The 4000 GPU is yet more powerful, "the 4600 series will have 240, the 4800 series will have 480, and the 4870 X2 will sport a total of 960 SPs" Keep in mind the 2900XT and 38xx have 320. That is a 50% boost just in raw number. Who knows if efficiency is also improved. Quote Link to comment Share on other sites More sharing options...
ParoxysM Posted May 19, 2008 Share Posted May 19, 2008 These are GeForce 4 names from 6 years ago, n1. Quote Link to comment Share on other sites More sharing options...
PurSuiT Posted May 20, 2008 Share Posted May 20, 2008 These are GeForce 4 names from 6 years ago, n1. like the 9600 and 9800???? The nVidia 9700 (pro) will kick ass... Quote Link to comment Share on other sites More sharing options...
B.Ob. Posted May 22, 2008 Author Share Posted May 22, 2008 4800 possible specs Probably not correct, but interesting never-the-less!!! Quote Link to comment Share on other sites More sharing options...
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