AMD's DirectX 10.1 entry and mid-range level GPUs: RV620 and RV635

Monday 10th September 2007, 12:12:00 PM, written by Farid

Information about the future successors of the RV610 and RV630, found respectively in the Radeon HD 2400 and 2600, has been unearthed. The always unable to keep a secret sources close to graphics card manufacturers told DigiTimes that AMD's DirectX 10.1 entry-level and mid-range graphics processor would be known under the incremental names of RV635 and RV620.

Manufactured at TSMC like their predecessors, these two new chips will be fabricated on a 55nm half-node process, whereas current Radeon HD 2400 and 2600-powering chips are 65nm products. Additionally to their new manufacturing process, RV635 and RV620's main upgrade comes from their DirectX 10.1 compatibility, making the chips Shader Model 4.1 compliant.

The still unnamed boards, likely to be named Radeon HD 2500 and 2650 according to the same sources, will be PCI Express 2.0 and Display Port compatible. RV635 and RV620 are also expected to be pin compatible and use the same PCB design as the previous chips --RV630 and RV610—to allow add-in-board (AIB) manufacturers a simple inventory transition between the production of old and new products.

First samples of the new chips should be sent to AIB manufacturers in October this year. These new boards should be launched by Q108, as early as January.

Discuss on the forums

Tagging

ati ± rv635, rv620, rv630, rv610


Latest Thread Comments (44 total)
Posted by vertex_shader on Wednesday, 09-Jan-08 11:49:37 UTC
HD3670 256mb ES review (http://en.expreview.com/?p=178)

Rv630 149mm
Rv635 120mm

Its a engineering sample but the card 55nm GPU has lower GPU clock speed (725mhz) than the hd2600xt GPU at 65nm (800mhz).
Expreview tested the card at hd2600xt 800/1600 clocks, its consume more power at idle/load than the 65nm version, this can be change if the retail card has a newer revision GPU, when not than than this shrink goes in the bad way.
Card support powerplay, 2d clock speed are 110mhz/405mhz.

Posted by no-X on Wednesday, 09-Jan-08 12:39:44 UTC
According to this slide, AMD isn't going to launch HD3670 - only HD3850:

Image: http://media.bestofmicro.com/N/J/73423/original/02RV620.jpg

Posted by vertex_shader on Wednesday, 09-Jan-08 12:57:53 UTC
Quoting no-X
According to this slide, AMD isn't going to launch HD3670 - only HD3850:

[IMG]ttp://media.bestofmicro.com/N/J/73423/original/02RV620.jpg[/IMG]
Rv620le = xx50, rv620pro = xx70, rv635pro = xx50, weird.
Well time will tell what coming, its won't surprise me after i read expreview rv635 review they skip the XT version.

Posted by CJ on Wednesday, 09-Jan-08 13:25:12 UTC
Quoting vertex_shader
Rv620le = xx50, rv620pro = xx70, rv635pro = xx50, weird.Well time will tell what coming, its won't surprise me after i read expreview rv635 review they skip the XT version.
That slide is correct.There is currently only 1 RV635 SKU and that's the HD3650. So that preview is falsely assuming that there will be a HD3670. The HD3650 will come in 2 variants though. One with GDDR2 and one with GDDR3.

Posted by vertex_shader on Wednesday, 09-Jan-08 13:40:29 UTC
Quoting CJ
There is currently only 1 RV635 SKU and that's the HD3650. So that preview is falsely assuming that there will be a HD3670.
Ok, but its show the reason why no XT (xx70) version coming.

Posted by Mariner on Wednesday, 09-Jan-08 16:15:45 UTC
Although it is entirely possible that a 55nm shrink could use more power than the 65nm 'original' chip (depending on inner workings of the process itself, I assume), the use of an engineering sample doesn't tell us much, does it? Surely such an engineering sample could be running at different voltage to the final chips also?

Posted by no-X on Wednesday, 09-Jan-08 18:06:04 UTC
Maybe HD3670 will be second X1650XT? (crippled performance chip - thus released later?)

Posted by Jawed on Wednesday, 09-Jan-08 18:19:56 UTC
Quoting no-X
Maybe HD3670 will be second X1650XT? (crippled performance chip - thus released later?)
There really should be HD37xx, i.e. something like RV660, I reckon. Jawed

Posted by no-X on Wednesday, 09-Jan-08 19:47:35 UTC
RV670, 1-2 dead quads, 600MHz core, 128bit..?

Posted by vertex_shader on Tuesday, 15-Jan-08 12:52:48 UTC
HD3450 128mb review (http://en.expreview.com/?p=201)

Rv610 78.75mm
Rv620 66.5mm

Quote
The card in our hand is RV620 LE, Radeon HD 3450 with 128MB GDDR2 memory. For NDA reason, we can not post any picture before the official launch.
This part is funny, NDA can't allow pictures for the card before launch but allow performance review before lauch :lol:

Image: http://www.expreview.com/img/review/rv620-hd3450/rv6203d.png


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