NVIDIA "G80" Retail Details Unveiled

samsung

w00t) http://www.dailytech.com/article.aspx?newsid=4441


woo

流氓兔116

难道是GDDR4太贵了还是发热量太高了

niwei

:funk: MD,我点了半天也没打开

gzeasy2006

原帖由 不老牛奶 于 2006-10-5 13:32 发表
NV果然是坚定的GDDR4反对者——

那G80用什么类型的显存？

aeondxf

core clock 575 MHz
shaders clocked 1350 MHz……

流氓兔116

原帖由 不老牛奶 于 2006-10-5 13:37 发表

不清楚NV和INTEL的具体原因，但是这两家厂商都不推崇GDDR4，尤其是NV，即使显卡显存的吞吐率都受到影响，也坚持不采用GDDR4。

难道是想砍价
ATI的支持

fineday

原帖由 samsung 于 2006-10-5 13:27 发表
w00t) http://www.dailytech.com/article.aspx?newsid=4441


woo

除了频率，没新意:p

gzeasy2006

原帖由 不老牛奶 于 2006-10-5 13:38 发表

新闻里不是说了，估计是384bit的GDDR3。

GDDR3？ 那频率是多少？比GDDR4的频率低吗？

killpmp

同频下GDDR4性能稍微不如GDDR3
而且从X1950XTX的情况来看2GHz的GDDR4对性能的提升也并没想像中的那么大，但发热量却大了不少

或许是G80太热了，还要12颗GDDR4的话那就更是火上浇油了

shu0202

应该是功耗问题。

niwei

MD,G80是80NM,单核心(_(

mrxstc2

点不开，谁贴一下

fineday

原帖由 shu0202 于 2006-10-5 14:04 发表
应该是功耗问题。

GDDR4和早期GDDR2差不多，功耗巨大，价格贵。
NV摆明了继续玩成本:p
另外，R600的所谓512bit，没准又是RingBus带宽
若是512bit的MC，光是PCB成本估计就要比G80成卡还贵了:p 没个16层别想稳定

killpmp

DirectX 10 compliant GeForce 8800GTX and 8800GTS headed your way

DailyTech's hands-on with the GeForce 8800 series continues with more information about the GPU and the retail boards. The new NVIDIA graphics architecture will be fully compatible with Microsoft’s upcoming DirectX 10 API with support for shader model 4.0, and represents the company's 8th generation GPU in the GeForce family.

NVIDIA has code-named G80 based products as the GeForce 8800 series. While the 7900 and 7800 series launched with GT and GTX suffixes, G80 will do away with the GT suffix. Instead, NVIDIA has revived the GTS suffix for its second fastest graphics product—a suffix that hasn’t been used since the GeForce 2 days.

NVIDIA’s GeForce 8800GTX will be the flagship product. The core clock will be factory clocked at 575 MHz. All GeForce 8800GTX cards will be equipped with 768MB of GDDR3 memory, to be clocked at 900 MHz. The GeForce 8800GTX  will also have a 384-bit memory interface and deliver 86GB/second of memory bandwidth. GeForce 8800GTX graphics cards are equipped with 128 unified shaders clocked at 1350 MHz. The theoretical texture fill-rate is around 38.4 billion pixels per second.

Slotted right below the GeForce 8800GTX is the slightly cut-down GeForce 8800GTS. These graphics cards will have a G80 GPU clocked at a slower 500 MHz. The memory configuration for GeForce 8800GTS cards slightly differ from the GeForce 8800GTX. GeForce 8800GTS cards will be equipped with 640MB of GDDR3 graphics memory clocked at 900 MHz. The memory interface is reduced to 320-bit and overall memory bandwidth is 64GB/second. There will be fewer unified shaders with GeForce 8800GTS graphics cards. 96 unified shaders clocked at 1200 MHz are available on GeForce 8800GTS graphics cards.

Additionally GeForce 8800GTX and 8800GTS products are HDCP compliant with support for dual dual-link DVI, VIVO and HDTV outputs. All cards will have dual-slot coolers too.  Expect GeForce 8800GTX and 8800GTS products to launch the second week of November 2006. This will be a hard launch as most manufacturers should have boards ready now.

Power requirements for the G80 were detailed in an earlier DailyTech article.

gzeasy2006

原帖由 不老牛奶 于 2006-10-5 13:41 发表

但比等效频率和I/O传输率，肯定是GDDR4占优，但是NV采用384bit的显存位宽也许能挽回一些劣势。

GDDR3的频率最高能上到多高？

killpmp

如果真是1800MHz的GDDR3的话，那么跟2000MHz的GDDR4性能也基本相同
不过看起来高端显卡显存总带宽要看位宽了

[ 本帖最后由 killpmp 于 2006-10-5 14:15 编辑 ]

fineday

原帖由 不老牛奶 于 2006-10-5 14:15 发表

NV应该不会冒险直接用这么高频率的GDDR3。因为功耗也很巨大。

:huh: 不是说了，900MHz的GDDR3么。

godlike

:huh: GTS 320bit