RTX 4080顯卡預計將採用23Gbps GDDR6X顯存，功耗達340W

來源：WCCF Tech

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根據Kopite7kimi的爆料，英偉達的GeForce RTX 4080顯卡有了新的規格信息，改變了顯存規格和功耗,NVIDIA利用更快的GDDR6X內存模塊（顯存爲16GB大小），同時4080將獲得23Gbps的速率。這也導致了功耗的略微提高，從之前的320W上升到340W。

不過，在其他GPU配置中，可能將之前預定配置的64MB的二級緩存和高達224個ROPs削減成48MB的二級緩存和較低的ROPs。

至於顯卡內存規格，GeForce RTX 4080預計將採用16GB GDDR6X容量，據說在256位總線接口上以23Gbps的速度調整。這將提供高達736 GB/s的帶寬。不過這仍然比RTX 3080提供的760 GB/s帶寬慢一點，因爲它有一個320位接口，但容量只有10 GB。英偉達可能會整合一個下一代內存壓縮套件，以彌補256位接口的不足。

在功率方面，TBP的額定功率現在設定爲340W，比我們之前得到的320W規格增加了20W。這使TBP與現有的RTX 3080顯卡（高達350W）達到了相同的水平。現在還不知道其他RTX 40系列顯卡是否也將獲得更快的GDDR6X內存處理，不過目前美光已經開始全面大規模生產高達24Gbps的GDDR6X內存模塊，總會有用到他們的地方。

NVIDIA's GeForce RTX 4080 graphics card has got a new spec update from leaker, Kopite7kimi, who reports even faster GDDR6X memory. According to the leaker, most of the specifications for the NVIDIA GeForce RTX 4080 graphics card remain the same and the only thing that has changed is the memory spec and the power design. It looks like NVIDIA will be leveraging from Micron's faster GDDR6X memory modules, with the 4080 reportedly getting 23 Gbps dies. This spec update has also resulted in a slightly higher TBP, moving up to 340W from the previous 320W figure. Let's make some updates. RTX 4080PG136/139-SKU360AD103-300-A19728FP3216GB 23Gbps GDDR6Xtotal card power 340W — kopite7kimi (@kopite7kimi) August 23, 2022 NVIDIA GeForce RTX 4080 'Expected' Specifications The NVIDIA GeForce RTX 4080 is expected to utilize a cut-down AD103-300 GPU configuration with 9,728 cores or 76 SMs enabled of the total 84 units whereas the previous configuration offered 80 SMs or 10,240 cores. While the full GPU comes packed with 64 MB of L2 cache and up to 224 ROPs, the RTX 4080 might end up with 48 MB of L2 cache and lower ROPs too due to its cut-down design. The card is expected to be based on the PG136/139-SKU360 PCB. As for memory specs, the GeForce RTX 4080 is expected to rock 16 GB GDDR6X capacities that are said to be adjusted at 23 Gbps speeds across a 256-bit bus interface. This will provide up to 736 GB/s of bandwidth. This is still a tad bit slower than the 760 GB/s bandwidth offered by the RTX 3080 since it comes with a 320-bit interface but a lowly 10 GB capacity. To compensate for the lower bandwidth, NVIDIA could be integrating a next-gen memory compression suite to make up for the 256-bit interface. For power, the TBP is now set to be rated at 340W, a 20W increase from the previous 320W spec that we got. This brings the TBP to the same ballpark as the existing RTX 3080 graphics card (up to 350W). Now it is not known whether the other RTX 40 series graphics cards will also be getting the faster GDDR6X memory treatment but we know that Micron has commenced full mass production of up to 24 Gbps GDDR6X memory modules so they have to go somewhere. The NVIDIA GeForce RTX 4080 and RTX 4070 graphics cards will be amongst the first graphics cards besides the RTX 4090 to launch to gamers however we can't tell whether the green team plans to launch them within this year soon after RTX 4090 or wait till early next year. The RTX 4090 is so far expected to launch around October 2022.