GTX970 bug?

本帖最後由 vigiloconfido 於 2015-1-28 09:36 編輯

唔知會點呢... 張新卡先用左個零月...

http://www.lazygamer.net/general ... ory-allocation-bug/

http://www.extremetech.com/extreme/198214-198214

Edit 28/1: 外國朋友仔實測,今舖NV掰掰
http://www.reddit.com/r/pcmaster ... at_1440p_and_above/
用左A卡好耐,但A卡Driver好衰,所以先轉N記
世上無樂土

所以係當用到3G+既時候, memory banwidth有bug drop得好勁而影響性能?

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類似當年6系卡1.5gb~2gb vram既情況...

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有無人知a卡有無甘既情況?

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有無人知a卡有無甘既情況?
qian1234 發表於 2015-1-24 14:12



N卡廢都唔好拉埋其他人落水啦

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970 受災, 4GB 專利

http://www.techpowerup.com/20920 ... -3-3-gb-report.html
It may be the most popular performance-segment graphics card of the season, and offer unreal levels of performance for its $329.99 price, but the GeForce GTX 970 suffers from a design flaw, according to an investigation by power-users. GPU memory benchmarks run on GeForce GTX 970 show that the GPU is not able to address the last 700 MB of its 4 GB of memory.

The "GTX 970 memory bug," as it's now being called on tech forums, is being attributed to user-reports of micro-stutter noticed on GTX 970 setups, in VRAM-intensive gaming scenarios. The GeForce GTX 980, on the other hand, isn't showing signs of this bug, the card is able to address its entire 4 GB. When flooded with posts about the investigation on OCN, a forum moderator on the official NVIDIA forums responded: "we are still looking into this and will have an update as soon as possible."

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本帖最後由 mpegdecoder 於 2015-1-24 18:00 編輯

那個 Nai's Benchmark 程式的數據可靠性存疑?!!
剛用來測試 GTX650TI BOOST 2GB 驅動 347.25
RAM 到達 1280MB 後就下降

Nai's Benchmark
Allocating Memory . . .
Chunk Size: 128 MiByte
Allocated 15 Chunks
Allocated 1920 MiByte
Benchmarking DRAM
DRAM-Bandwidth of Chunk no. 0 (0 MiByte to 128 MiByte):111.10 GByte/s
DRAM-Bandwidth of Chunk no. 1 (128 MiByte to 256 MiByte):110.66 GByte/s
DRAM-Bandwidth of Chunk no. 2 (256 MiByte to 384 MiByte):111.18 GByte/s
DRAM-Bandwidth of Chunk no. 3 (384 MiByte to 512 MiByte):110.77 GByte/s
DRAM-Bandwidth of Chunk no. 4 (512 MiByte to 640 MiByte):110.88 GByte/s
DRAM-Bandwidth of Chunk no. 5 (640 MiByte to 768 MiByte):111.01 GByte/s
DRAM-Bandwidth of Chunk no. 6 (768 MiByte to 896 MiByte):112.96 GByte/s
DRAM-Bandwidth of Chunk no. 7 (896 MiByte to 1024 MiByte):115.29 GByte/s
DRAM-Bandwidth of Chunk no. 8 (1024 MiByte to 1152 MiByte):115.25 GByte/s
DRAM-Bandwidth of Chunk no. 9 (1152 MiByte to 1280 MiByte):115.16 GByte/s
DRAM-Bandwidth of Chunk no. 10 (1280 MiByte to 1408 MiByte):39.21 GByte/s
DRAM-Bandwidth of Chunk no. 11 (1408 MiByte to 1536 MiByte):45.88 GByte/s
DRAM-Bandwidth of Chunk no. 12 (1536 MiByte to 1664 MiByte):39.22 GByte/s
DRAM-Bandwidth of Chunk no. 13 (1664 MiByte to 1792 MiByte):39.21 GByte/s
DRAM-Bandwidth of Chunk no. 14 (1792 MiByte to 1920 MiByte):15.47 GByte/s
Benchmarking L2-Cache
L2-Cache-Bandwidth of Chunk no. 0 (0 MiByte to 128 MiByte):143.79 GByte/s
L2-Cache-Bandwidth of Chunk no. 1 (128 MiByte to 256 MiByte):143.79 GByte/s
L2-Cache-Bandwidth of Chunk no. 2 (256 MiByte to 384 MiByte):143.79 GByte/s
L2-Cache-Bandwidth of Chunk no. 3 (384 MiByte to 512 MiByte):143.79 GByte/s
L2-Cache-Bandwidth of Chunk no. 4 (512 MiByte to 640 MiByte):143.79 GByte/s
L2-Cache-Bandwidth of Chunk no. 5 (640 MiByte to 768 MiByte):143.79 GByte/s
L2-Cache-Bandwidth of Chunk no. 6 (768 MiByte to 896 MiByte):143.79 GByte/s
L2-Cache-Bandwidth of Chunk no. 7 (896 MiByte to 1024 MiByte):143.79 GByte/s
L2-Cache-Bandwidth of Chunk no. 8 (1024 MiByte to 1152 MiByte):143.79 GByte/s
L2-Cache-Bandwidth of Chunk no. 9 (1152 MiByte to 1280 MiByte):143.79 GByte/s
L2-Cache-Bandwidth of Chunk no. 10 (1280 MiByte to 1408 MiByte):140.71 GByte/s
L2-Cache-Bandwidth of Chunk no. 11 (1408 MiByte to 1536 MiByte):141.39 GByte/s
L2-Cache-Bandwidth of Chunk no. 12 (1536 MiByte to 1664 MiByte):140.72 GByte/s
L2-Cache-Bandwidth of Chunk no. 13 (1664 MiByte to 1792 MiByte):140.72 GByte/s
L2-Cache-Bandwidth of Chunk no. 14 (1792 MiByte to 1920 MiByte):15.47 GByte/s

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回覆 7# mpegdecoder
6系卡都曾經有過一個說法就係1.5GB之後剩低果500mb vram形同虛設

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我玩ACU有時會成個畫面停咗幾秒, 唔知關唔關事...

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回覆  mpegdecoder
6系卡都曾經有過一個說法就係1.5GB之後剩低果500mb vram形同虛設 ...
danny9428 發表於 2015-1-24 20:19


why my 660 can reach 1738mb in Dragon Age Inquisition with ultra setting?

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